• Title, Summary, Keyword: 실링 어버트먼트

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Development of a Sealing-Type Abutment for Implant and the Performance Evaluation via Structural Analysis (임플란트용 실링 어버트먼트의 개발 및 구조해석을 통한 성능분석)

  • Kim, Jeong Min;Hong, Dae Sun
    • Journal of the Korean Society for Precision Engineering
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    • v.33 no.9
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    • pp.769-775
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    • 2016
  • Currently, dental implants are widely used as artificial teeth due to their good chewing performance and long life cycle. Generally, a dental implant consists of an abutment as the upper part and a fixture as the lower part. When chewing forces are repeatedly applied to a dental implant, a gap is often generated at the interfacial surface between the abutment and the fixture, and it results in some deterioration such as loosening of the fastening screw, dental retraction and fixture fracture. To enhance the sealing performance for coping with such problems, this study proposes a new sealing-type abutment having a number of grooves along the conical surface circumference, and it carries out finite element analysis in consideration of the external chewing force and pretension between the abutment and the fixture. The result shows that the proposed sealing-type abutment shows an enhanced sealing performance in terms of the contact pressure in comparison with a conventional abutment.

Optimization of the Groove Depth of a Sealing-type Abutment for Implant Using a Genetic Algorithm (유전자알고리즘을 이용한 임플란트용 실링어버트먼트의 홈 깊이 최적화에 관한 연구)

  • Lee, Hyeon-Yeol;Hong, Dae-Sun
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.17 no.6
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    • pp.24-30
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    • 2018
  • Dental implants are currently widely used as artificial teeth due to their good chewing performance and long life cycle. A dental implant consists of an abutment as the upper part and a fixture as the lower part. When chewing forces are repeatedly applied to a dental implant, gap at the interface surface between the abutment and the fixture is often occurred, and results in some deteriorations such as loosening of fastening screw, dental retraction and fixture fracture. To cope with such problems, a sealing-type abutment having a number of grooves along the conical-surface circumference was previously developed, and shows better sealing performance than the conventional one. This study carries out optimization of the groove shape by genetic algorithm(GA) as well as structural analysis in consideration of external chewing force and pretension between the abutment and the fixture. The overall optimization system consists of two subsystems; the one is the genetic algorithm with MATLAB, and the other is the structural analysis with ANSYS. Two subsystems transmit and receive the relevant data with each other throughout the optimization processes. The optimization result is then compared with that of the conventional one with respect to the contact pressure and the maximum stress. The result shows that the optimized model gives better sealing performance than the conventional sealing abutment.

Development and Performance Evaluation of a Sealing-Type Abutment Inserted with a Gold Ring (골드링을 이용한 완전 밀폐형 어버트먼트 개발 및 성능평가)

  • Hong, Dae Sun;Jeon, Yong-Jae;Lee, Hyeon-Yeol;Lee, Seung Young
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.15 no.2
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    • pp.97-103
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    • 2016
  • When chewing forces are repetitively applied to a dental implant, gaps are often generated at the interface surfaces between the abutment and the fixture, which results in some deterioration, such as loosening of the fastening screw, dental retraction, and fixture fractures. To cope with such problems, a sealing-type abutment having a number of grooves along the conical-surface circumference was previously developed, and it showed better sealing performance than conventional ones. To enhance the sealing performance, a new model in which a gold ring is inserted into the top groove of the sealing-type abutment is developed in this study. In addition, a manufacturing process is developed, and performance evaluations, such as fatigue and sealing tests, are carried out. The evaluation results show that the gold-ring-inserted sealing abutment yields better performance than conventional ones.