Details of the Researcher

PHOTO

Akio Izumida
Section
Tohoku University Hospital
Job title
Assistant Professor
Degree

  • 博士（歯学） (Tohoku University)

Education 1

  • Tohoku University　Faculty of Dentistry　歯学科

    - 1994/03

Professional Memberships 6

  • 日本補綴歯科学会 東北北海道支部幹事

    2019/04 - 2021/03

  • 日本総合歯科学会（評議員）

    2019/04 - 2021/03

  • 日本総合歯科学会（2015/04-2017/03 評議員）

  • 日本総合歯科学会（2017/04-2019/03 評議員）

  • 日本歯科理工学会(2006/04-2008/03 DE編集協力委員)

  • 日本歯科理工学会(2004/04-2006/03 DE編集協力委員)

︎Show all ︎Show first 5

Research Interests 4

  • 磁性アタッチメント

  • レジン

  • 印象材

  • レオロジー

Research Areas 1

  • Life sciences / Prosthodontics /

Papers 44

  1. 咀嚼時の力を測る新システムの開発に関する研究 テクスチャーの異なる食品に対する咀嚼力の比較検討

    久米井 亨仁, 加地 仁, 泉田 明男, 高橋 正敏, 菊池 雅彦

    日本総合歯科学会雑誌　16　5-12　2024/10

    Publisher: 日本総合歯科学会

    eISSN： 2189-938X

  2. Potential complications of CAD/CAM-produced resin composite crowns on molars: A retrospective cohort study over four years. International-journal Peer-reviewed

    Miyu Inomata, Akio Harada, Shin Kasahara, Taro Kusama, Akane Ozaki, Yusuke Katsuda, Hiroshi Egusa

    PloS one　17　(4)　e0266358　2022

    DOI： 10.1371/journal.pone.0266358 　

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    PURPOSE: Evaluation of the clinical performance of computer-aided design/computer-aided manufacturing-produced resin composite crowns (CAD/CAM composite crowns) on molars with a particular focus on placement location. METHODS: A retrospective cohort study was performed based on the clinical records of patients with CAD/CAM composite crowns on molars (June 2016 to March 2021). The hazard ratios (HRs) and 95% confidence intervals (95% CIs) were estimated based the Cox proportional hazard model to evaluate the effect of tooth location on complication type and occurrence. Covariates included crown location (maxilla/mandible, distalmost tooth/not distalmost tooth, and first molar/second or third molar) and endodontically treated (nonvital) or untreated (vital) tooth. RESULTS: Overall, 362 crowns were evaluated (mean follow-up: 378 days, median: 286 days), and 106 crowns (29.3%) showed complications, most frequently crown debonding. The cumulative success and survival rates were 70.9% and 93.7%, respectively, after 1 year and 49.5% and 86.5%, respectively, after 3 years. There was no significant difference in the HRs and log-rank tests in the Kaplan-Meier curves based on crown location parameters (P > 0.05). However, placement on vital teeth was associated with higher risks than on nonvital teeth (HR, 1.55; 95% CI, 1.03-2.23). In addition, the cement as a covariate yielded a high HR. CONCLUSIONS: The location of CAD/CAM composite molar crowns is unlikely a risk factor for complications; therefore, these crowns can be clinically applied to all molars. However, the application of such molar crowns to vital teeth and the use of a cement other than adhesive resin cement present risks.

  3. Clinical evaluation of monolithic zirconia crowns: a failure analysis of clinically obtained cases from a 3.5-year study. Peer-reviewed

    Shoko Miura, Shinobu Yamauchi, Shin Kasahara, Yusuke Katsuda, Masanori Fujisawa, Hiroshi Egusa

    Journal of prosthodontic research　2020/09/09

    DOI： 10.2186/jpr.JPOR_2019_643 　

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    PURPOSE: The primary purpose of this study was to examine the clinical performance of monolithic zirconia single crowns in terms of short-term failure or complications. The secondary purpose was to detect the originating flaws of clinically failed monolithic zirconia crowns to find the causes of failure. METHODS: A short-term prospective cohort study based on record evaluation and clinical examination of patients treated with tooth-supported monolithic zirconia crowns was performed in the Department of Fixed Prosthodontics, Tohoku University Hospital, Japan. The crowns were prepared during the follow-up period from April 2014 to July 2018. The 3.5-year cumulative success and survival rates were set as primary endpoints. Fractures of the crown or fragments were inspected under a scanning electron microscope for descriptive fractography. RESULTS: During the study period, 40 monolithic zirconia crowns were placed. Four crowns experienced clinical complications, including: 1) fracture of the crown (two crowns), 2) abrasion of the crown (one crown), and 3) fracture of the antagonist tooth (one crown). The estimated Kaplan-Meier 3.5-year success and survival rates were 90.5% (95% confi dence interval [CI]: 73.1-97.1) and 92.8% (95% CI: 74.1-98.3), respectively. Fractography revealed that all fractures were initiated from the wear phase on the occlusal surface. CONCLUSIONS: The results of this study suggest that the molar application of monolithic zirconia crowns requires detailed attention to interocclusal clearance and the restoration of the antagonist tooth.

  4. A case report of a partial denture changed to an overdenture using a magnetic attachment. Peer-reviewed

    Akio Izumida, Masahiko Kikuchi

    東北大学歯学雑誌　37(2), 38(1), 38(2), 39(1)合併号　(2/1-2/1)　40-44　2020

    Publisher: 東北大学歯学会

    ISSN： 0287-3915

  5. 適合試験材の練和比が物性に及ぼす影響

    南 慎太郎, 泉田 明男, 菊池 雅彦

    日本補綴歯科学会誌　11　(特別号)　203-203　2019/05

    Publisher: (公社)日本補綴歯科学会

    ISSN： 1883-4426

    eISSN： 1883-6860

  6. A Thick Frame Decreases the Fracture Toughness of Veneering Ceramics Used for Zirconia-Based All-Ceramic Restorations Peer-reviewed

    Shinobu Yamauchi, Shoko Miura, Shin Kasahara, Jirun Sun, Hiroshi Egusa

    Journal of Prosthodontic Research　63　(2)　184-192　2019/04

    DOI： 10.1016/j.jpor.2018.11.007 　

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    PURPOSE: To investigate the influence of firing condition and thickness of a yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) frame on the fracture toughness of veneering ceramics. METHODS: Layering and pressable ceramics without frames or on 0.8- and 1.2-mm-thick Y-TZP frames were fired with 5 schedules (normal and 4 customized conditions). The fracture toughness of the ceramics was measured at 0.5-2.5mm from the frame by the indentation fracture method. Crystal structures at the measurement points were evaluated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). RESULTS: Under customized firing conditions, the fracture toughness of the layering ceramic significantly decreased, particularly near the frame. Use of a 1.2-mm-thick frame significantly decreased the fracture toughness of both layering and pressable ceramics compared to ceramics without the frame. The decreased fracture toughness only occurred close (0.5 and 1.0mm) to the frame. XRD analysis showed identical diffraction patterns between points near and far from the frame, suggesting that the decreased fracture toughness was not due to crystal defects or impurities. SEM revealed many microcracks and large crystals in layering ceramic near the 1.2-mm-thick frame, possibly resulting from the thermal properties of the zirconia frame, such as large heat capacity and low thermal conductivity. CONCLUSIONS: Modification of the firing conditions from the manufacturer's instructions and inclusion of a thick Y-TZP frame decreased the fracture toughness of veneering ceramics at the interface, suggesting that a thick frame would pose a potent fracture risk in veneering ceramics used for zirconia-based all-ceramic restorations.

  7. A case report of oral rehabilitation by applying implant treatment with sinus lift Peer-reviewed

    IZUMIDA Akio

    Ann Jpn Prosthodont Soc　11　(2)　167-170　2019/04

  8. A possible risk of CAD/CAM-produced composite resin premolar crowns on a removable partial denture abutment tooth: a 3-year retrospective cohort study

    Shoko Miura, Shin Kasahara, Shinobu Yamauchi, Yusuke Katsuda, Akio Harada, Jun Aida, Hiroshi Egusa

    Journal of Prosthodontic Research　63　(1)　78-84　2019/01

    DOI： 10.1016/j.jpor.2018.08.005 　

    ISSN： 1883-1958

  9. Denture repair with the application of a magnetic attachment to the inner crown of a telescopic crown: A 3-year follow-up case. Peer-reviewed

    Akio Izumida

    The Journal of the Japanese Society of Magnetic Applications in Dentistry　28　(2)　9-13　2019

  10. Effect of finish line design on stress distribution in bilayer and monolithic zirconia crowns: a three-dimensional finite element analysis study Peer-reviewed

    Shoko Miura, Shin Kasahara, Shinobu Yamauchi, Hiroshi Egusa

    European Journal of Oral Sciences　126　(2)　159-165　2018/04/01

    Publisher: Blackwell Munksgaard

    DOI： 10.1111/eos.12402 　

    ISSN： 1600-0722 0909-8836

  11. Clinical Evaluation of Zirconia-Based All-Ceramic Single Crowns: An up to 12-year Retrospective Cohort Study. International-journal Peer-reviewed

    Shoko Miura, Shin Kasahara, Shinobu Yamauchi, Yayoi Okuyama, Akio Izumida, Jun Aida, Hiroshi Egusa

    Clinical Oral Investigations　22　(2)　697-706　2018

    DOI： 10.1007/s00784-017-2142-y 　

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    OBJECTIVES: This study aims to investigate the incidence of clinical complications with tooth-supported zirconia-based all-ceramic single crowns and identify pertinent risk parameters. MATERIALS AND METHODS: A retrospective cohort study (May 2004 to April 2016) utilizing clinical records of patients receiving yttrium-oxide-partially stabilized zirconia (Y-TZP)-based all-ceramic crowns placed at Tohoku University Hospital was performed. The length of time of treatment success (complication event-free) and restoration survival (including minor complication events and remaining clinically functional) were estimated using Kaplan-Meier analysis. Multilevel survival analysis was used to identify risk factors. RESULTS: One hundred thirty-seven crowns were evaluated (mean follow-up time, 7.0 years). A total of 21 crowns experienced at least one complication with fracture of veneering ceramic being the most common (16 crowns). Estimated success and survival rates at 5 years (96.9 and 98.5%, respectively) decreased at 10 years to 62.1 and 67.2%, respectively. The risk of complications was significantly higher for molar crowns compared to anterior crowns (p < 0.01). A significant association of complications with metal antagonist restorations was shown by univariate analysis (p < 0.01). CONCLUSIONS: Given the study limitations, Y-TZP single crowns placed on anterior teeth demonstrated encouraging clinical results over a period of up to 10 years. However, there is a substantial risk of complications with posterior teeth within 10 years of restoration placement. CLINICAL RELEVANCE: Treatment with zirconia-based all-ceramic crowns for molar teeth with metal antagonist occlusion should be undertaken with caution.

  12. Three-dimensional finite element analysis of zirconia all-ceramic cantilevered fixed partial dentures with different framework designs Peer-reviewed

    Shoko Miura, Shin Kasahara, Shinobu Yamauchi, Hiroshi Egusa

    EUROPEAN JOURNAL OF ORAL SCIENCES　125　(3)　208-214　2017/06

    DOI： 10.1111/eos.12342 　

    ISSN： 0909-8836

    eISSN： 1600-0722

  13. Comparison of impression border form between mouth closing and opening impression procedures Peer-reviewed

    Hitoshi Kachi, Akio Izumida, Ken Takahashi, Shintaro Minami, Masahiko Kikuchi

    35・36　(2/1)　46-55　2017/06

    Publisher:

    ISSN： 0287-3915

  14. A case report of denture repair with application of a magnetic attachment to the inner crown of a telescopic crown Peer-reviewed

    IZUMIDA Akio

    24　(1)　78-82　2015/12

  15. Update zirconia restorations Peer-reviewed

    Takuro Takeichi, Shoko Miura, Shin Kasahara, Hiroshi Egusa, Mai Hara, Toru Sato, Masao Yoshinari, Tetsurou Odatsu, Ikuya Watanabe, Takashi Sawase

    JOURNAL OF PROSTHODONTIC RESEARCH　59　(2)　81-83　2015/04

    DOI： 10.1016/j.jpor.2014.11.005 　

    ISSN： 1883-1958

    eISSN： 2212-4632

  16. Clinical chipping of zirconia all-ceramic restorations Peer-reviewed

    Shokog Miura, Shing Kasahara, Momokog Kudo, Yayoig Okuyama, Masanobug Yoda, Hiroshig Egusa

    Interface Oral Health Science 2014: Innovative Research on Biosis-Abiosis Intelligent Interface　317-323　2015/01/01

    Publisher: Springer Japan

    DOI： 10.1007/978-4-431-55192-8_27 　

  17. Fit of zirconia all-ceramic crowns with different cervical margin designs, before and after porcelain firing and glazing Peer-reviewed

    Shoko Miura, Ryoichi Inagaki, Shin Kasahara, Masanobu Yoda

    DENTAL MATERIALS JOURNAL　33　(4)　484-489　2014/08

    DOI： 10.4012/dmj.2013-284 　

    ISSN： 0287-4547

  18. Laser welding between titanium as a magnetic shielding material and SUS 447J1 stainless steel Peer-reviewed

    Yukyo Takada, Masatoshi Takahashi, Akira KIkuchi, Hideki Sato, Akio Izumida, Yoshinori Nakamura, Yoshinobu Tanaka, Taichi Tenkumo

    22　(1)　90-95　2013/12

  19. Materials and internal structures of foreign-made dental magnetic attachments Peer-reviewed

    Yukyo Takada, Masatoshi Takahashi, Yosuke Kinouchi, Yoshinori Nakamura, Yoshinobu Tanaka, Hideki Sato, Akio Izumida, Taichi Tenkumo

    22　(1)　96-102　2013/12

  20. A Resin Facing Cast Crown with a Keeper-Bonding between the Keeper of a Magnetic Attachment and a Ag-Pd-Au Cast Alloy Was Used: A Case Report Peer-reviewed

    IZUMIDA Akio

    21　(1)　79-82　2012/12

  21. Finite element analysis to determine the stress distribution in implant components Peer-reviewed

    Ryoichi Inagaki, Masanobu Yoda

    Interface Oral Health Science 2011　263-264　2012/01/01

    Publisher: Springer Japan

    DOI： 10.1007/978-4-431-54070-0_76 　

  22. Effect of zirconia frame thickness on fracture toughness of veneer porcelain Peer-reviewed

    Momoko Kudo, Shoko Miura, Masafumi Kikuchi, Ryoichi Inagaki, Joonho Cho, Keiichi Sasaki, Masanobu Yoda

    Interface Oral Health Science 2011　268-270　2012/01/01

    Publisher: Springer Japan

    DOI： 10.1007/978-4-431-54070-0_78 　

  23. A Magnetic Attachment with a Casting Junction between the Keeper of a Magnetic Attachment and a Ag-Pd-Au Cast Alloy Was Used for Eight Years: A Case Report Peer-reviewed

    IZUMIDA Akio

    18　(1)　68-71　2009/11

  24. Educational Effect on Tooth Preparation of Visual Feedback using Computer Graphics Peer-reviewed

    Toshinobu Abe, Yayoi Okuyama, Shin Kasahara, Kohei Kimura

    Ann Jpn Prosthodontics Soc　1　(2)　123-129　2009/04

    DOI： 10.1007/978-4-431-99644-6_98 　

  25. Study on the Bond Strength of Self-Wetting Hybrid Polysiloxane Impression Materials

    Izumida Akio, Ishibashi Minoru, Yoda Masanobu

    Abstracts of the General Sessions of the Japanese Society for Dental Materials and Devices　2009　60-60　2009

    Publisher: The Japanese Society for Dental Materials and Devices

    DOI： 10.14832/gsjsdmd.2009s.0.60.0 　

  26. Mechanical Properties of Hard Resins for Crowns and Bridges. 52 : 521-528, 2008. Peer-reviewed

    Akio Izumida, Masanobu Yoda, Ryoichi Inagaki, Jouji Toyoda, Minoru Ishibashi, Shin Kasahara, Kohei Kimura, IZUMIDA Akio

    The Journal of Japan Prosthodont Society　52　(4)　521-528　2008/10

    ISSN： 0389-5386

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    PURPOSE: Hard resins for crowns and bridges are widely used for esthetic restorations. The objective of this study was to evaluate the mechanical properties of new commercial hard resins and to compare the results with those of the other hard resins previously investigated. METHODS: Dentin and enamel made with two new hard resins (Epricord: EP, Kuraray, Co., Ltd., Osaka, Japan and Prossimo: PR, GC, Co., Ltd., Tokyo, Japan) were used in this study. Regarding the fundamental characteristics, the thermal expansion/shrinkage coefficient, the filler content, the polymerization shrinkage, and the wear were examined. Regarding the strength of resin, the bending strength, hardness, compression strength, elastic modulus, and fracture strength of a jacket crown were measured. RESULTS: These resins showed comparatively lower levels than the other hard resins regarding the bending strength, hardness, compression strength, and fracture strength of the jacket crown. The total filler content rate and wear amount of these resins exhibited similar values to those of the other resins. The thermal expansion/ shrinkage coefficients of these resins exhibited higher values than those of the other resins. EP showed a different tendency from PR about the compression strength, elastic modulus, and polymerization shrinkage. CONCLUSIONS: PR and EP did not show dramatically better physical properties. However, the results of each examination in this study may be acceptable clinically. The results of each investigation changed according to the products used, and proper use for each case and application was suggested.

  27. Preparation of TiO<inf>2</inf> coating on dental metal materials by plasma CVD Peer-reviewed

    Ryotaro Marumori, Teiichi Kimura, Takashi Goto, Masanobu Yoda, Kohei Kimura

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　55　(5)　331-335　2008/05

    Publisher: Japan Society of Powder and Powder Metallurgy

    DOI： 10.2497/jjspm.55.331 　

    ISSN： 0532-8799

  28. Galvanic corrosion of ferritic stainless steels used for dental magnetic attachments in contact with an iron-platinum magnet Peer-reviewed

    Keisuke Nakamura, Yukyo Takada, Masanobu Yoda, Kohei Kimura, Osamu Okuno

    DENTAL MATERIALS JOURNAL　27　(2)　203-210　2008/03

    DOI： 10.4012/dmj.27.203 　

    ISSN： 0287-4547

  29. [Thermal expansion of layering porcelains for the tetragonal stabilized zirconia]. Peer-reviewed

    Shoko Miura, Ryoichi Inagaki, Masanobu Yoda, Kohei Kimura

    Nihon Hotetsu Shika Gakkai zasshi　51　(3)　556-62　2007/07

    ISSN： 0389-5386

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    PURPOSE: The purpose of this study was to investigate the coefficients of thermal expansion and shrinkage of an all-ceramic system (cercon) smart ceramics, DeguDent) utilizing tetragonal stabilized zirconia. METHODS: The coefficients of thermal expansion and shrinkage of the core material and the layering porcelains (dentin and enamel) used in this study were measured according to the ISO 9693 standard. Five specimens for the core material and ten specimens for each layering porcelain were tested. The core specimens were milled, sintered, ground and polished. Five of the specimens for each layering porcelain were fired two times, and the remaining five specimens were fired four times. The fired layering porcelain specimens were ground and polished. The coefficients of thermal expansion and shrinkage were evaluated using a push-rod dilatometer at a heating rate of 5 degrees C /min over temperature ranges of 25-700 degrees C for the core, and 25-550 degrees C for the layering porcelain. For each specimen, the coefficients of thermal expansion was determined to be between 25 and 500 degrees C from the plotted curve of expansion versus temperature. RESULTS: For the core material, the coefficients of thermal expansion and shrinkage showed almost the same value (10.8 x 10(-6)/ degrees C). For the layering porcelains, the coefficients of thermal expansion and shrinkage ranged from 9.3-11.1 x 10(-6)/ degrees C. The difference of the coefficients of thermal expansion and shrinkage between the core materials and the layering porcelains was -0.3-1.5 x 10(-6)/ degrees C. The specimens fired two times and the specimens fired four times exhibited almost the same value for each layering porcelain. CONCLUSION: The core material and layering porcelains have a suitable relationship.

  30. Rheological Study of Hard Resin for Crown and Bridge Peer-reviewed

    泉田明男, 友田浩三, 木村幸平, 小松正志, 奥野 攻

    The Journal of Japan Prosthodontic Society　50　(3)　396-403　2006/07/10

    Publisher: Japan Prosthodontic Society

    DOI： 10.2186/jjps.50.396 　

    ISSN： 0389-5386

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    Purpose: For the purpose of evaluating the flow properties influencing the formativeness of commercial hard resin pastes used in the construction of crowns and bridges, we examined the behaviors of various resin pastes and their temperature dependence during manipulation.<BR>Methods: Five types of hard resins currently in use for the construction of crowns and bridges in the clinical setting, namely, New Meta Color INFIS, Solidex, Ceramage, Gradia, and Estenia C&B, were examined. The components and flow properties of each resin paste were investigated in relation to the dentine and enamel colors. The viscosities of the resin pastes before curing were measured by a cone-plate viscometer.<BR>Results: Each resin paste demonstrated a non-Newtonian flow, and the flow curve showed a hysteresis loop, in which the upward and downward curves were different. When the shear stress at the beginning of the holding time of the flow curve (20°C, 25°C, 30°C) of each resin paste was measured, the shear stress at 20°C was found to be significantly higher than that at 25°C and 30°C, and the shear stress at 25°C was found to be significantly higher than that at 30°C. The viscosity was found to be higher at lower temperatures than at higher temperatures. Comparison of the shear stresses at the beginning and at the end of the holding time revealed that the stress at the beginning of the holding time was significantly higher than that at the end of the holding time for all except the Estenia C&B resin paste.<BR>Conclusions: Each of the resin pastes used in the present study showed temperature dependence of its characteristics in the temperature range examined (20-30°C) and thixotropic fluidity. However, the flow characteristics of these resin pastes differed significantly, suggesting that the flow characteristics may affect the manipulation of resin formativeness.

  31. Mechanical Properties of a New Hard Resin for Crown and Bridge

    IZUMIDA AKIO, ISHIBASHI MINORU, INAGAKI RYOICHI, YAMADA SATOSHI, KASAHARA SHIN, YODA MASANOBU, KIMURA KOHEI

    Abstracts of the General Sessions of the Japanese Society for Dental Materials and Devices　2006　91-91　2006

    Publisher: The Japanese Society for Dental Materials and Devices

    DOI： 10.14832/gsjsdmd.2006f.0.91.0 　

  32. 歯槽骨延長術を併用したデンタルインプラント治療

    高田 陽子, 小枝 聡子, 泉田 明男, 豊田 丈爾, 依田 正信, 木村 幸平, 稲井 哲司, 伊藤 秀美, 小山 重人, 佐々木 啓一, 長坂 浩, 川村 仁

    東北大学歯学雑誌　24　(1)　36-37　2005/06

    Publisher: 東北大学歯学会

    ISSN： 0287-3915

  33. 高弾性重付加型シリコーンゴム印象材の動的粘弾性 Peer-reviewed

    泉田明男, 細谷 誠, 依田正信, 木村幸平

    歯科材料・器械　24　(4)　231-239　2005/04

    DOI： 10.18939/jjdm.24.4_231 　

  34. Quantitative evaluation of axial wall taper in prepared artificial teeth.

    Yayoi Okuyama, Shin Kasahara, Kohei Kimura

    Journal of oral science　47　(3)　129-133　2005

    DOI： 10.2334/josnusd.47.129 　

    ISSN： 1343-4934

  35. Mechanical Properties of New Hard Resin for Crown and Bridge

    IZUMIDA AKIO, ISHIBASHI MINORU, KONNNO TATSUHIKO, INAGAKI RYOUICHI, YAMADA SATOSHI, KASAHARA SHIN, YODA MASANOBU, KIMURA KOHEI

    Abstracts of the General Sessions of the Japanese Society for Dental Materials and Devices　2005　81-81　2005

    Publisher: The Japanese Society for Dental Materials and Devices

    DOI： 10.14832/gsjsdmd.2005s.0.81.0 　

  36. 義歯床用レジンの吸水性と動的粘弾性 Peer-reviewed

    片倉直至, 泉田明男, 佐々木英夫, 木村幸平, 奥野 攻

    東北大学歯学雑誌　23　(2)　67-72　2004/04

  37. 硬質レジン重合用光照射器の基礎的検討 Peer-reviewed

    泉田明男, 山田 聡, 依田正信, 木村幸平

    歯科審美　16　(2)　283-289　2004/03

  38. 市販親水性重付加型シリコーンゴム印象材の流動性 Peer-reviewed

    泉田明男, 細谷 誠, 片倉直至, 笠原 紳, 依田正信, 奥野 攻, 木村幸平

    歯科材料・器械　21　(5)　278-284　2002/04

    DOI： 10.18939/jjdm.21.5_278 　

  39. 各種歯冠用硬質レジンの物理的性質について―重合収縮と耐摩耗性― Peer-reviewed

    泉田明男, 菖蒲正宏, 豊田丈爾, 笠原 紳, 石橋 実, 稲垣亮一, 細谷 誠, 依田正信, 木村幸平

    歯科審美　14　(2)　219-224　2002/03

  40. 各種歯冠用硬質レジンの物理的性質について Peer-reviewed

    石橋 実, 依田正信, 稲垣亮一, 笠原 紳, 豊田丈爾, 細谷 誠, 泉田明男, 菖蒲正宏, 木村幸平

    歯科審美　13　(2)　256-263　2001/03

  41. 重付加型シリコーンゴム印象材の流動性に関するレオロジー的研究 Peer-reviewed

    泉田明男, 細谷 誠, 木村幸平

    日本補綴歯科学会雑誌　44　(6)　768-775　2000/12/10

    Publisher: Japan Prosthodontic Society

    DOI： 10.2186/jjps.44.768 　

    ISSN： 0389-5386

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    The purpose of this study was to give polyaddition-type silicone impression materials (Regular Type) the characteristics that the pastes are easy to mix, and they are difficult to hang down from the tray. In a previous study, the inorganic filler significantly affected the flow characteristics of impression materials. As usual, polyaddition-type silicone impression materials (Regular Type) do not have a yield value in the flow characteristics. A material with a yield value has superior workability characteristics.<BR>We attempted to make pastes of mixtures having a yield value. The silicone prepolymers used were vinyl polydimethylsiloxanes with 56, 000 and 85, 000 molecular weights (Mw), and the inorganic fillers used were quartz and synthetic silica (micro filler). The flow properties of experimental pastes were investigated by using a cone-plate viscometer, from the rheological point of view. As a result, a little addition of synthetic silica in experimental pastes made a flow property having a yield value and was effective in working. This study suggests a direction in manufacturing impression materials toward including superior characteristics that had low viscosity and was easy to mix in working.

  42. 市販粘膜調整材のゲル化後におけるレオロジー的性質 Peer-reviewed

    片倉直至, 細谷 誠, 泉田明男, 奥野 攻, 木村幸平

    東北大学歯学雑誌　19　(2)　116-124　2000/12

  43. 重付加型シリコーンゴム印象材の組成と流動特性 Peer-reviewed

    泉田明男, 細谷 誠, 片倉直至, 笠原 紳, 依田正信, 奥野 攻, 木村幸平

    日本補綴歯科学会雑誌　44　(4)　504-511　2000/08/10

    Publisher: Japan Prosthodontic Society

    DOI： 10.2186/jjps.44.504 　

    ISSN： 0389-5386

    More details Close

    The purpose of this study was to investigate flow characteristics of four commercial polyaddition-type silicone impression materials (Regular Type) before mixing.<BR>Base and catalyst pastes were filler and polymer separated by a centrifugal separator with benzene for component analysis. As a result, weight fraction of filler was 39-55% and the chief ingredient was silica. The main polymer of base and catalyst pastes was polydimethylsiloxane. Especially, base polymer included hydrogen polydimethylsiloxane which was a crosslinking agent. The molecular weight (Mw) of these polymer was mostly about 40, 000-70, 000.<BR>The viscosities of these pastes before mixing were measured by a cone-plate viscometer. Both base and catalyst pastes demonstrated pseudoplastic behavior which is the non-Newton flow. Particularly, base pastes showed thixotropic properties because of their clear hysteresis curves and time dependency on the viscosity. One of the base pastes had a yield value.<BR>The inorganic filler significantly affected on flow characteristics of impression materials. The results suggested a means to manufacture impression materials with superior characteristics for working.

  44. 市販ティッシュコンディショナーの組成と流動特性 Peer-reviewed

    細谷 誠, 片倉直至, 八代浩次, 豊田丈爾, 泉田明男, 依田正信, 奥野 攻, 木村幸平

    日本　43　(3)　551-558　1999/06/10

    Publisher: Japan Prosthodontic Society

    DOI： 10.2186/jjps.43.551 　

    ISSN： 0389-5386

    More details Close

    In this study, the relationship between the composition and the flow properties of three commercial tissue conditioners was investigated. Analysis of the composition was chiefly done by infrared spectroscopy (IR). As for the liquid, plasticizer was qualitatively determined and the content of alcohol was measured by distillation. The characteristics of polymer powders were obtained by means of gel permeation chromatography (GPC), particle size analyzer and SEM. As for the flow property, the apparent viscosity of a mixture of liquid and powder was measured by a cone and plate rotational viscometer.<BR>As a result, the liquid was a mixture of a phthalic ester plasticizer (dibutyl phthalate) with up to 13% ethyl alcohol. The polymer powders generally consisted of polyethyl methacrylate (PEMA), but one was a blend of PEMA and polyisobutyl methacrylate (iso-PBMA).<BR>The viscosities of mixtures were found to increase rapidly with an increase in the ethyl alcohol content, and an increase in temperature. Further, the viscosity curve of the tissue conditioner, of which the powder was a blend of PEMA and iso-PBMA, showed characteristic behavior. Thus it was suggested that the flow property of the tissue conditioner was affected by the molecular structure of the polymer powder.

Show all ︎Show first 5

Misc. 26

  1. 歯科技工用光照射器が歯冠用硬質レジンの物性に及ぼす影響

    泉田 明男, 菊池 雅彦

    日本歯科理工学会誌　34　(2)　174-174　2015/03

    Publisher: (一社)日本歯科理工学会

    ISSN： 1884-4421

  2. ジルコニアオールセラミック修復の臨床調査報告

    三浦 賞子, 笠原 紳, 奥山 弥生, 泉田 明男, 工藤 桃子, 依田 正信, 佐々木 啓一

    日本補綴歯科学会誌　6　(特別号)　308-308　2014/05

    Publisher: (公社)日本補綴歯科学会

    ISSN： 1883-4426

  3. 新歯冠用硬質レジンの物理的性質に関する研究

    泉田明男, 笠原紳, 加藤裕光, 稲垣亮一, 石橋実, 奥山弥生, 三浦賞子, 原田章生, 佐々木啓一

    日本補綴歯科学会学術大会プログラム・抄録集　123rd　298　2014/04/01

    ISSN： 1883-4426

  4. P-5 Mechanical properies of flowable hard resin for crowns and bridges

    Izumida A, Ishibashi M, Kasahara S

    The journal of the Japanese Society for Dental Materials and Devices　32　(5)　339-339　2013/09/25

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 1884-4421

    More details Close

    The aim of this study was to evaluate the mechanical properties of a flowable hard resin. Strength of this resin was investigated by three-point bending test. The samples were prepared made by laminating a paste type of this resin and a flowable type of this resin as well as samples made with only flowable type of resin. Samples made with only flowable type of this resin were exhibited sufficient strength. However, in order to avoid problems at the production of the facing crown, more to use a paste type of resin primarily would be better.

  5. Dimensional accuracy of plaster model-In vitro evaluation of non-destructive micro X-rays CT

    IZUMIDA A, ISHIBASHI M, KASAHARA S, YODA M

    The journal of the Japanese Society for Dental Materials and Devices　30　(5)　307-307　2011/09/25

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 1884-4421

    More details Close

    The purpose of this study is to evaluate the dimensional accuracy of plaster model applying a micro X-rays CT which is measureable non-destructively. Evaluation was performed by comparing the plaster model applying the micro X-rays CT and a cut plaster model which is measured directly. From the results of this study, it was shown that there was non-significant difference between two methods. Therefore, the micro X-rays CT was shown to be a useful technique to assess the dimensional accuracy of plaster model.

  6. Basic Properties of Self-Wetting Hybrid Polysiloxane Impression Materials

    IZUMIDA A., YODA M.

    Journal of the Japanese Society for Dental Materials and Devices　27　(5)　426-426　2008/09/25

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

  7. Discrepancies of Marginal Fit during Seating with Resin Modifided Glass-Ionomer Cements

    SAITO H, IZUMIDA A, KASAHARA S, KATO H, YODA M, KIMURA K

    52　(117)　171-171　2008/06/06

  8. P-57 Handling of Resin-Modified Glass Polyalkenoate Cements

    SAITO H., IZUMIDA A., KASAHARA S., YODA M., KIMURA K.

    Journal of the Japanese Society for Dental Materials and Devices　27　208-208　2008

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

  9. P-32 Basic Properties of Polyaddition-type Silicone Impression Materials with Titanium dioxide

    IZUMIDA A., YODA M.

    Journal of the Japanese Society for Dental Materials and Devices　27　167-167　2008

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

  10. Fundamental Properties of a New Hard Resin for Crown and Bridge with nano filler

    IZUMIDA A., MARUMORI R., YODA M., KIMURA K.

    Journal of the Japanese Society for Dental Materials and Devices　26　(2)　215-215　2007/04/25

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

  11. Fracture Behavior of Glass Fiber Reinforced Composite Resin : Application of Micro Focus X-ray CT System

    YAMADA S, KASAHARA S, IZUMIDA A, YODA M, KIMURA K, TAKADA Y, OKUNO O

    50　(115)　275-275　2006/07/08

  12. Fundamental properties of a new hard resin for crown and bridge

    IZUMIDA A., MARUMORI R., YODA M., KIMURA K.

    Journal of the Japanese Society for Dental Materials and Devices　25　(2)　130-130　2006/04/05

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

  13. Flow Properties of Resin Paste for Crown and Bridge

    26　(2)　225-225　2005/12/20

    ISSN： 0914-7713

  14. Mechanical properties of new hard resin for crown and bridge

    IZUMIDA A., MARUMORI R., OKUYAMA Y., YODA M., KIMURA K.

    Journal of the Japanese Society for Dental Materials and Devices　24　(5)　329-329　2005/09/05

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

  15. 3. 新歯冠用硬質レジンの基礎的物性に関する検討 : 熱膨張係数, 重合収縮率, 耐摩耗性, フィラー含有率(第46回東北大学歯学会講演抄録)

    丸森 亮太朗, 泉田 明男, 豊田 丈爾, 菖蒲 正宏, 奥山 弥生, 依田 正信, 木村 幸平, 東北大学大学院歯学研究科口腔修復学講座咬合機能再建学分野, 東北大学大学院歯学研究科口腔修復学講座咬合機能再建学分野, 東北大学大学院歯学研究科口腔修復学講座咬合機能再建学分野, 東北大学大学院歯学研究科口腔修復学講座咬合機能再建学分野, 東北大学大学院歯学研究科口腔修復学講座咬合機能再建学分野, 東北大学大学院歯学研究科口腔修復学講座咬合機能再建学分野, 東北大学大学院歯学研究科口腔修復学講座咬合機能再建学分野

    東北大学歯学雑誌 = Tohoku University dental journal　24　(1)　35-36　2005/06/30

    ISSN： 0287-3915

  16. ガラス繊維補強レジン複合体の破壊様相‐アコースティックエミッション法の応用‐

    山田聡, 泉田明男, 笠原紳, 依田正信, 木村幸平, 高田雄京, 奥野攻

    日本補綴歯科学会学術大会プログラム・抄録集　113th　(113回特別)　153-153　2005/05

    Publisher: (公社)日本補綴歯科学会

    ISSN： 1883-4426

  17. Mechanical Properties of Polyaddition-type Silicone Impression Materials for Implant

    IZUMIDA A., HOSOTANI M., YODA M., KIMURA K., KATAKURA N., OKUNO O.

    Journal of the Japanese Society for Dental Materials and Devices　23　(5)　373-373　2004/09/10

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

  18. Mechanical properties of polyaddition-type silicone impression materials having short setting time

    IZUMIDA A., HOSOTANI M., YODA M., KIMURA K., KATAKURA N., OKUNO O.

    Journal of the Japanese Society for Dental Materials and Devices　22　(5)　429-429　2003/08/25

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

  19. Thermoplasticity of the experimental root canal filling materials including guttapercha

    HAYASHI M., ARAKI Y., IZUMIDA A., KATSURA H., KIMURA K.

    Journal of the Japanese Society for Dental Materials and Devices　22　(5)　327-327　2003/08/25

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

  20. Study on Wear of Natural Tooth and Several Restorative Materials for Crown and Bridge : Influence of Alloys on Wear

    TOYODA J, IZUMIDA A, INAGAKI R, YODA M, KIMURA K

    47　152-152　2003/05/09

    ISSN： 0389-5386

  21. Dynamic mechanical properties of high elastic polyaddition-type silicone impression materials

    IZUMIDA A., HOSOTANI M., KATAKURA N., YODA M., KIMURA K., OKUNO O.

    21　53-53　2002/08/10

    ISSN： 0286-5858

  22. <講演抄録>1.歯冠用硬質レジン・プロシモ^(R)の物質的性質(第39回東北大学歯学会講演抄録)(一般演題)

    菖蒲 正宏, 泉田 明男, 依田 正信, 笠原 紳, 石橋 実, 豊田 丈爾, 稲垣 亮一, 三上 眞, 佐藤 美次男, 佐々木 栄信, 加藤 裕光, 木村 幸平, 付属歯科技工士学校

    東北大学歯学雑誌 = Tohoku University dental journal　20　(2)　113-113　2001/12/01

    ISSN： 0287-3915

  23. Study on Wear of Natural Tooth and Several Restorative Materials for Crown and Bridge

    TOYODA J, IZUMIDA A, INAGAKI R, YODA M, KIMURA K

    45　(106)　197-197　2001/10/26

  24. <講演抄録>4.歯冠用硬質レジンの熱膨張に関する基礎的検討(第37回東北大学歯学会講演抄録)(一般演題)

    菖蒲 正宏, 依田 正信, 佐藤 美次男, 泉田 明男, 細谷 誠, 笠原 紳, 石橋 実, 豊田 丈爾, 稲垣 亮一, 三上 眞, 佐々木 栄信, 加藤 裕光, 木村 幸平

    東北大学歯学雑誌 = Tohoku University dental journal　19　(2)　192-192　2000/12/01

    ISSN： 0287-3915

  25. Rheological Study on Polyaddition-type Silicone Impression Materials

    HOSOTANI M, IZUMIDA A, YODA M, KASAHARA S, KIMURA K, KATAKURA N, OKUNO O

    40　(96)　40-40　1996/11/01

  26. Flow characteristics of polyaddition - type silicone impression materials

    IZUMIDA A., HOSOTANI M., KASAHARA S., KIMURA K., KATAKURA N., OKUNO O.

    14　(26)　30-31　1995/09/05

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

Show all ︎Show first 5

Presentations 55

  1. 臨床研修開始時の新たな取り組みについて．

    泉田明男, 南 慎太郎, 加地 仁, 王 鋭, 菊池 雅彦

    第12回日本総合歯科学会学術大会　2019/11/03

  2. Effect of mixing ratio for fitness test material on its physical properties

    IZUMIDA Akio

    2019/05/12

  3. Denture repair with the application of a magnetic attachment to the inner crown of a telescopic crown: A 3-year follow-up case. International-presentation

    IZUMIDA Akio

    The 18th International Conference on Magnetic Applications Dentistry　2019/02

  4. A case report of a partial denture changed to an overdenture using a magnetic attachment for three years

    IZUMIDA Akio

    2018/11/03

  5. 磁性アタッチメントを用いてオーバーデンチャーに移行した部分床義歯修理の一症例．

    泉田明男, 髙田雄京

    第27回日本磁気歯科学会学術大会　2017/11/11

  6. 歯科医師臨床研修修了後の進路―大学院進学状況―．

    泉田明男, 加地 仁, 王 鋭, 南 慎太郎, 菊池雅彦

    第10回日本総合歯科学会学術大会　2017/11/04

  7. サイナスリフトによるインプラント治療を応用した咬合回復の一症例．

    泉田 明男

    平成28年度日本補綴歯科学会・東北・北海道支部大会　2016/10/29

  8. 開口印象と閉口印象における印象辺縁形態の比較．

    加地仁, 泉田明男, 菊池雅彦

    平成27年度日本補綴歯科学会・東北・北海道支部大会　2015/10

  9. 歯科技工用光照射器が歯冠用硬質レジンの物性に及ぼす影響．

    泉田明男, 菊池雅彦

    第65回日本歯科理工学会　2015/04

  10. 新規歯冠用硬質レジンによるジャケットクラウンの破壊様相．

    相澤なみき, 原田章生, 木村真也, 泉田明男, 笠原 紳, 三浦賞子, 加藤裕光

    第37回日本歯科技工学会　2014

  11. ジルコニアオールセラミックの臨床調査報告．

    三浦賞子, 笠原紳, 奥山弥生, 泉田明男, 工藤桃子, 依田正信, 佐々木啓一

    第123回日本補綴歯科学会　2014

  12. 新歯冠用硬質レジンの物理的性質に関する研究．

    泉田明男, 笠原 紳, 加藤裕光, 稲垣亮一, 石橋 実, 奥山弥生, 三浦賞子, 原田章生, 佐々木啓一

    第123回日本補綴歯科学会　2014

  13. A Retrospective Study of Zirconia All-ceramic Single Crowns: 5-years clinical results. International-presentation

    S. MIURA, S. KASAHARA, M.KUDO, Y. OKUYAMA, A.IZUMIDA, M. YODA, K. SASAKI

    Innovative Research for Biosis-Abiosis Intelligent Interface Symposium (The 5th International Symposium for Interface Oral Health Science)　2014

  14. Effects of antiseptic solution on plaster model surface roughness. International-presentation

    Kato Hiroaki, Izumida Akio, Kasahara Shin

    The 5th International Congress of Dental Technology, The 49th Korean Dental Technologist Academic Conference, The 35th Nippon academy of Dental Technology　2013/07

  15. 歯冠用フロアブル硬質レジンの基礎物性に関する検討．

    泉田明男, 石橋 実, 笠原 紳

    第62回日本歯科理工学会　2013

  16. ジルコニアオールセラミッククラウンの臨床調査報告．

    工藤桃子, 三浦賞子, 笠原紳, 奥山弥生, 泉田明男, 稲垣亮一, 佐々木啓一, 依田正信

    第122回日本補綴歯科学会　2013

  17. 新歯冠用フロアブル硬質レジンの基礎物性に関する検討．

    泉田明男, 石橋 実, 笠原 紳, 依田正信

    平成24年度日本補綴歯科学会・東北・北海道支部大会　2012

  18. Mechanical Properties of a New Hybrid Hard Resin for Crowns and Bridges. International-presentation

    Izumida A, Ishibashi M, Inagaki R, Okuyama Y, Yoda M

    Proceedings of the International Dental Materials Congress 2011 In Conjunction with 57th General Session of the Japanese Society for Dental Materials and Devices　2011/05

  19. マイクロエックス線ＣＴ画像を用いた非破壊的検査による石膏模型の寸法測定評価．

    泉田明男, 石橋 実, 笠原 紳, 依田正信

    第58回日本歯科理工学会　2011

  20. 新重付加型シリコーンゴム適合試験材の流動特性．

    泉田明男, 依田正信

    第55回日本歯科理工学会　2010

  21. Study on the Bond Strength of Self-Wetting Hybrid Polysiloxane Impression Materials -Temperature Effects on Adhesive Properties-. International-presentation

    Akio Izumida, Minoru Ishibashi, Masanobu Yoda

    The 3rd International Conference on Processing, Manufacturing of Advanced Materials　2009/07

  22. 超親水性ハイブリッドシリコーンゴム印象材の接着強さに関する基礎的検討．

    泉田明男, 石橋 実, 依田正信

    第53回日本歯科理工学会　2009

  23. グラスアイオノマー系レジンセメントによるクラウン装着時の浮き上がり

    齋藤裕太, 泉田明男, 笠原 紳, 加藤裕光, 依田正信, 木村幸平

    日本補綴歯科学会第117回学術講演会　2008/06/07

  24. 二酸化チタン配合重付加型シリコーンゴム印象材の基礎的検討

    泉田明男, 依田正信

    日本歯科理工学会第51回学術講演会　2008/04/26

  25. グラスアイオノマー系レジンセメントの操作性に関する基礎的検討

    齋藤裕太, 泉田明男, 笠原 紳, 依田正信, 木村幸平

    日本歯科理工学会第51回学術講演会　2008/04/26

  26. 超親水性ハイブリッドシリコーンゴム印象材の基礎的検討．

    泉田明男, 依田正信

    第52回日本歯科理工学会　2008

  27. Mechanical Properties of a New Hard Resin for Crown and Bridge with nano filler International-presentation

    Akio Izumida, Masanobu Yoda

    日本歯科理工学会第50回学術講演会（国際歯科材料会議2007併催）　2007/11/22

  28. ナノフィラー配合新歯冠用硬質レジンの基礎的物性

    泉田明男, 丸森亮太朗, 依田正信, 木村幸平

    日本歯科理工学会第49回学術講演会　2007/05/12

  29. 新歯冠用硬質レジンの強度に関する検討

    泉田明男, 石橋 実, 稲垣亮一, 山田 聡, 笠原 紳, 依田正信, 木村幸平

    日本歯科理工学会第48回学術講演会　2006/10/28

  30. ガラス繊維補強レジン複合体の破壊様相の解明

    山田 聡, 笠原 紳, 泉田明男, 依田正信, 木村幸平, 高田雄京, 奥野 攻

    日本補綴歯科学会　2006/07/08

  31. 新歯冠用硬質レジンの基礎的物性に関する検討

    泉田明男, 丸森亮太朗, 依田正信, 木村幸平

    日本歯科理工学会　2006/04/22

  32. 歯冠用レジンペーストの流動性

    友田浩三, 泉田明男, 木村幸平, 小松正志, 奥野 攻

    日本歯科技工学会　2005/09/16

  33. 新歯冠用硬質レジンの操作性に関する基礎的検討

    泉田明男, 丸森亮太朗, 奥山弥生, 依田正信, 木村幸平

    日本歯科理工学会　2005/09/15

  34. ガラス繊維補強レジン複合体の破壊様相―アコースティックエミッション法の応用―．

    山田 聡, 泉田明男, 笠原 紳, 依田正信, 木村幸平, 高田雄京, 奥野 攻

    第113回日本補綴歯科学会　2005

  35. 歯冠用レジンの操作性について―レジンペーストの流動特性―．

    友田浩三, 泉田明男, 木村幸平, 小松正志, 奥野 攻

    第113回日本補綴歯科学会　2005

  36. 新歯冠用硬質レジンの強度に関する基礎的検討．

    泉田明男, 石橋 実, 今野龍彦, 稲垣亮一, 山田 聡, 笠原 紳, 依田正信, 木村幸平

    第45回日本歯科理工学会　2005

  37. インプラント用重付加型シリコーンゴム印象材の理工学的性質．

    泉田明男, 細谷 誠, 依田正信, 木村幸平, 片倉直至, 奥野 攻

    第44回日本歯科理工学会　2004/09/24

  38. 当科における歯槽骨延長術を併用したインプラント治療．

    高田陽子, 小枝聡子, 泉田明男, 豊田丈爾, 依田正信, 木村幸平, 稲井哲司, 伊藤秀美, 小山重人, 佐々木啓一, 長坂 浩, 川村 仁

    第46回東北大学歯学会　2004

  39. 新歯冠用硬質レジンの基礎的物性に関する検討‐熱膨張係数，重合収縮率，耐摩耗性，フィラー含有率‐．

    丸森亮太郎, 泉田明男, 豊田丈爾, 菖蒲正宏, 奥山弥生, 依田正信, 木村幸平

    第46回東北大学歯学会　2004

  40. 硬質レジン重合用光照射器の基礎的検討．

    泉田明男, 山田 聡, 依田正信, 木村幸平

    第1４回日本歯科審美学会　2003

  41. 試作ガッタパーチャ系根管充填材の熱可塑性．

    林 正規, 荒木吉馬, 泉田明男, 桂 啓文, 木村幸平

    第42回日本歯科理工学会　2003

  42. 硬化時間の短い重付加型シリコーンゴム印象材の理工学的性質．

    泉田明男, 細谷 誠, 依田正信, 木村幸平, 片倉直至, 奥野 攻

    第42回日本歯科理工学会　2003

  43. 天然歯および各種歯冠用修復材料の摩耗に関する検討―合金の種類による摩耗への影響―．

    豊田丈爾, 泉田明男, 稲垣亮一, 依田正信, 木村幸平

    第109回日本補綴歯科学会　2003

  44. 高弾性重付加型シリコーンゴム印象材の動的粘弾性．

    泉田明男, 細谷 誠, 片倉直至, 依田正信, 木村幸平, 奥野 攻

    第40回日本歯科理工学会　2002/08/31

  45. The Mechanical Properties of Hard Resins for Crown and Bridge. International-presentation

    AKIO IZUMIDA, MASANOBU YODA, KOHEI KIMURA

    7th Biennial Meeting of Asian Academy of Aesthetic Dentistry　2002/07

  46. 義歯床用レジンの物理的性質．

    片倉直至, 泉田明男, 佐々木英夫, 木村幸平, 奥野 攻

    平成14年度日本歯科理工学会北海道・東北支部夏期セミナー　2002

  47. 歯冠用硬質レジン・プロシモ®の物理的性質．

    菖蒲正宏, 泉田明男, 依田正信, 笠原 紳, 石橋 実, 豊田丈爾, 稲垣亮一, 三上 眞, 佐藤美次男, 佐々木栄信, 加藤裕光, 木村幸平

    第39回東北大学歯学会　2001/06

  48. 各種歯冠用硬質レジンの物理的性質について－重合収縮と耐摩耗性－．

    泉田明男, 菖蒲正宏, 豊田丈爾, 笠原 紳, 石橋 実, 稲垣亮一, 細谷 誠, 依田正信, 木村幸平

    第12回日本歯科審美学会学術大会　2001

  49. 天然歯および各種歯冠用修復材料の摩耗に関する検討．

    豊田丈爾, 泉田明男, 稲垣亮一, 依田正信, 木村幸平

    第106回日本補綴歯科学会　2001

  50. 親水性重付加型シリコーンゴム印象材の流動性－親水性付与による流動性への影響－．

    泉田明男, 細谷 誠, 片倉直至, 笠原 紳, 依田正信, 木村幸平, 奥野 攻

    平成13年度日本歯科理工学会北海道・東北支部夏期セミナー　2001

  51. 各種歯冠用硬質レジンの諸物性とジャケットクラウンの破折強度との関係

    豊田丈爾, 稲垣亮一, 笠原 紳, 細谷 誠, 石橋 実, 泉田明男, 菖蒲正宏, 依田正信, 木村幸平

    平成12年度日本補綴歯科学会東北北海道支部会　2000/09/02

  52. 歯冠用硬質レジンの熱膨張に関する基礎的検討

    菖蒲正宏, 依田正信, 佐藤美次男, 泉田明男, 細谷 誠, 笠原 紳, 石橋 実, 豊田丈爾, 稲垣亮一, 三上 眞, 佐々木栄信, 加藤裕光, 木村幸平

    第37回東北大学歯学会　2000/06/22

  53. 高弾性重付加型シリコーンゴム印象材の理工学的性質

    泉田明男, 細谷 誠, 笠原 紳, 依田正信, 木村幸平, 片倉直至, 奥野 攻

    第14回日本歯科産業学会　1999/08/28

  54. シリコーンゴム印象材の操作性に関するレオロジー的研究

    細谷 誠, 泉田明男, 依田正信, 笠原 紳, 木村幸平, 片倉直至, 奥野 攻

    第96回日本補綴歯科学会　1996/11/01

  55. 付加型シリコーンゴム印象材の流動性

    泉田明男, 細谷 誠, 笠原 紳, 木村幸平, 片倉直至, 奥野 攻

    第26回日本歯科理工学会　1995/09/29

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Research Projects 5

  1. Development of the novel light-cured dentin regenerative cement

    Takeru Kondo, Hiroaki Kakimuma, Hiroshi Egusa

    Offer Organization: Japan Agency for Medical Research and Development (AMED)

    System: Medical Device Research and Development Project: Challenge Type

    2025/05 - 2026/03

  2. Development of Bioactive Ti-Mg alloys for dental implants enhancing bone formation

    TAKADA YUKYO

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2013/04/01 - 2017/03/31

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    We aimed to develop Ti-Mg alloys with possibility that magnesium in their solid solution stimulated biomedical tissues as a trigger and that it resulted in leading bone morphogenetic growth. Although we invented a new alloying method applying gas-solid reaction, it did not work and we could not obtain the solid solution in which magnesium diffused. In concurrently running works, we succeeded to fix magnesium on the titanium surface easily as a compound, which was obtained by a surface modification of the magnesium ions on the alkaline heating treatment titanium surface. Sheet and cylinder types of specimens modified by magnesium ions were implanted into subcutaneous and thighbone of a rat, respectively. According to those tissues at the vicinity of the implants after two weeks, fiber structures on the modified specimens in the subcutaneous was thinner than those on pure titanium specimens. The improvement of the bone contact ratios could be confirmed by the modification of magnesium.

  3. The development of suppressing dental plaque's adhesion to hard resin

    IZUMIDA Akio

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2011 - 2013

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    This study was carried out by paying attention to the properties of titanium dioxide. Titanium dioxide applied to environmental technology can be expected to provide a self-cleaning effect, and it has good wettability with water. The samples were made by replacing the titanium dioxide part of the hard resin's composition. As a result, the sample had a mechanical strength comparable to commercially available material. In addition, improvemed wettability was observed in that sample. The improved of wettability of the sample is related to the fact that material is less likely to adhere to the surface. From these results, it was possible to obtain suggestions for developing a veneering resin to which dental plaque will have difficulty adhering.

  4. 軟らかく弾性回復性に優れた重付加型シリコーンゴム印象材の開発

    泉田 明男

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究(B)

    Institution: 東北大学

    2003 - 2004

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    本研究の前年度の目的は,精密弾性印象材として臨床において広く用いられている重付加型シリコーンゴム印象材の操作性の向上,すなわち,硬化前ペーストに練りやすさと垂れにくさを付与することであった。これを受けて今年度は硬化体の物性の向上を目指して研究を行った。 前年度に得られた試作ペースト中,練りやすさと垂れにくさを兼ね備え,最も操作性が良いと思われたキャタリストペースト相当のフィラー含有率40%のペーストに希釈触媒液を加えて,フィラー含有率40%のベースペースト相当のペーストと練和することにより硬化体を試作した。 硬化体は,はじめに動的試験として粘弾性スペクトロメータによる動的粘弾性試験を行い,貯蔵弾性率と損失正接を測定した。その結果,貯蔵弾性率は市販の従来型よりも小さな値をとる傾向を示し,損失正接は市販の高弾性型よりも小さな値をとる傾向を示した。また,静的試験として弾性ひずみ,永久ひずみ,硬さ試験を行った。その結果,市販材料の従来型と比較して弾性ひずみは大きく,永久ひずみは同程度硬さは小さな値をとる傾向を示した。 レジンとの接着に関しては,3種類の市販印象材に附属した接着剤について赤外分光光度計を用いて赤外分光分析を行い,含まれている官能基を推定した。その結果,共通してメチル基を含む有機けい素化合物が含まれていることが推定された。また,レジンとの接着が比較的良好な市販材には脂肪族不飽和炭化水素の存在が推定された。これらを参考に接着剤を試作しレジンとの接着性を検討した。その結果,接着強さはレジンとの接着が比較的良好な市販材料と同程度を示し,破断面は界面破壊を認めた。

  5. Development of New Tissue Conditioners used poly (butyl methacrylate)

    KATAKURA Naoyuki, IZUMIDA Akio

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2003 - 2004

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    The purpose of this study was to develop the new tissue conditioners, which consist of poly (butyl methacrylate) and the liquid plasticizer without an endocrine disrupter. 1.Syntheses of polymers Homopolymers (isoPBMA, PEMA) and copolymer of isobutyl methacrylate (isoBMA) and ethyl methacrylate (EMA) were synthesized by suspension polymerization in aqueous gelatin. 2.Particle size and molecular weight of polymers The particle size of polymer powder is related to flow properties and gelation time of powder/liquid mixtures. The particle sizes of polymer powders of isoPBMA, PEMA, and copolymer were 32μm, 29μm, and 35μm, respectively. The molecular weight of polymer is related to viscoelastic properties of powder/liquid mixtures after gelation. The weight average molecular weight. of isoPBMA and copolymer was 280,000, and that of PEMAwas 210,000. 3.Flow properties of powder and liquid mixtures The viscosity-time curves of mixtures of copolymer powder and plasticizer dibutyl sebacate (DBS) containing ethanol were measured by the cone-plate viscometer. After two or three minutes, the viscosities of mixtures increased rapidly with gelation. It was found that ethanol content of 13〜15% and powder/liquid ratio of 1.3〜1.4 were useful and practical for a tissue conditioner. 4.Dynamic viscoelasticity of powder and liquid mixtures The viscoelastic properties of mixtures of copolymer powder and DBS containing 13% ethanol after gelation were investigated by the dynamic method. The viscoelastic data of storage modulus G' and loss tangent tan δ versus frequencies at different temperatures were superimposed to a master curve by application of the time-temperature superposition principle. These viscoelastic properties of new experimental materials were similar to those of a commercially available tissue conditioner. This study indicates that a new tissue conditioner without an endocrine disrupter can be made by use of copolymer and DBS.

Social Activities 6

  1. [日本国内] 秋保診療所

    2007/04/01 - 2008/03/31

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    非常勤歯科医師

  2. [日本国内] 秋保診療所

    2006/04/01 - 2006/07/31

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    非常勤歯科医師

  3. [日本国内] 丸森町国保病院

    2005/09/01 - 2005/12/28

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    非常勤歯科医師

  4. [日本国内] 丸森町国保病院

    2004/04/01 - 2004/12/28

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    非常勤歯科医師

  5. [日本国内] 丸森町国保病院

    2003/04/01 - 2004/03/31

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    非常勤歯科医師

  6. [日本国内] 丸森町国保病院

    2002/04/01 - 2003/03/31

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    非常勤歯科医師

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Media Coverage 1

  1. 気になる症状 すっきり診断―歯の色が変わった―． Myself

    河北新報

    2022/09/11

    Type: Newspaper, magazine