Yoshinori Gunji

Publications (3)2.6 Total impact

• Article: Stress distribution in the peri-implant bone with splinted and non-splinted implants by in vivo loading data-based finite element analysis.

  Ryuji Shigemitsu, Toru Ogawa, Tetsuya Matsumoto, Nobuhiro Yoda, Yoshinori Gunji, Yuki Yamakawa, Kiyohiro Ikeda, Keiichi Sasaki
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  ABSTRACT: The aim of this study was to evaluate stress distribution in peri-implant bone and to investigate the influence of splinting implants by finite element analysis (FEA) with in vivo loading data. The magnitude and direction of the force exerted on implants during maximal voluntary clenching of a subject were recorded with 3-D piezoelectric force transducers. FEA using in vivo loading data was conducted on splinted and non-splinted models with two implants. Overall, the splinted model reduced stress in peri-implant bone in comparison with the non-splinted model.
  Odontology 06/2012; · 1.22 Impact Factor
• Chapter: In vivo analysis of the 3-D force on implants supporting fixed prostheses

  Yoshinori Gunji, Nobuhiro Yoda, Takahiro Chiba, Toru Ogawa, Tsunemoto Kuriyagawa, Keiichi Sasaki
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  ABSTRACT: Three-dimensional (3-D) loads exerted on implants were measured in a patient with implant-supported fixed prosthesis using load-measuring devices including piezoelectric force transducers. The devices were mounted on implant-fixtures at the mandibular right molar region. Tasks analyzed were maximum voluntary clenching (MVC) and biting a piece of paraffin wax. Load measurements were made in two conditions; the superstructures were splinted and not splinted. Sum of load magnitudes exerted on the two implants showed no significant difference between with and without splinting regardless of task. During MVC, magnitudes were allocated more evenly to the two implants in the condition with splinting than without splinting. During wax biting, magnitudes and directions on both implants were not different significantly between with and without splinting. Key wordsbiomechanics-implant-prosthodontics-splinting-superstructure
  12/2009: pages 169-171;
• Article: In vivo load measurement for evaluating the splinting effects of implant-supported superstructures: a pilot study.

  Nobuhiro Yoda, Yoshinori Gunji, Toru Ogawa, Tetsuo Kawata, Keiichi Sasaki
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  ABSTRACT: The purpose of this in vivo study was to evaluate the biomechanical effects of splinting of implant-supported superstructures using piezoelectric transducers to measure the three-dimensional forces exerted on implants supporting fixed superstructures. Measuring devices were set into the implant fixtures at the mandibular right second premolar and first molar. During clenching, force magnitudes were allocated more evenly to the two implants if they were splinted compared with the unsplinted control implants. However, this equalization of load distribution was not apparent during wax biting. Splinting of implant-supported fixed superstructures affects the force exerted on implants, especially during clenching.
  The International journal of prosthodontics 26(2):143-6. · 1.38 Impact Factor