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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한치과보철학회 The Journal of Advanced of Prosthodontics The Journal of Advanced of Prosthodontics 제13권 제1호
- 발행연도
- 2021.1
- 수록면
- 12 - 23 (12page)
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초록· 키워드
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Purpose. The aim of the study was to compare the lingualized implant placement creating a buccal cantilever with prosthetic-driven implant placement exhibiting excessive crown-to-implant ratio. Materials and Methods. Based on patient’s CT scan data, two finite element models were created. Both models were composed of the severely resorbed posterior mandible with first premolar and second molar and missing second premolar and first molar, a twounit prosthesis supported by two implants. The differences were in implants position and crown-to-implant ratio; lingualized implants creating lingually overcontoured prosthesis (Model CP2) and prosthetic-driven implants creating an excessive crown-to-implant ratio (Model PD2). A screw preload of 466.4 N and a buccal occlusal load of 262 N were applied. The contacts between the implant components were set to a frictional contact with a friction coefficient of 0.3. The maximum von Mises stress and strain and maximum equivalent plastic strain were analyzed and compared, as well as volumes of the materials under specified stress and strain ranges. Results. The results revealed that the highest maximum von Mises stress in each model was 1091 MPa for CP2 and 1085 MPa for PD2. In the cortical bone, CP2 showed a lower peak stress and a similar peak strain. Besides, volume calculation confirmed that CP2 presented lower volumes undergoing stress and strain. The stresses in implant components were slightly lower in value in PD2. However, CP2 exhibited a noticeably higher plastic strain. CONCLUSION. Prosthetic-driven implant placement might biomechanically be more advantageous than bone quantity-based implant placement that creates a buccal cantilever.
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참고문헌 (50)
참고문헌 신청
2017 / The Glossary of Prosthodontic Terms: Ninth Edition / J Prosthet Dent 117:e1~e105
Hälg GA / 2008 / Bone level changes at implants supporting crowns or fixed partial dentures with or without cantilevers / Clin Oral Implants Res 19:983~990
Stegaroiu R / 1998 / Influence of restoration type on stress distribution in bone around implants : a three-dimensional finite element analysis / Int J Oral Maxillofac Implants 13:82~90
Kim P / 2014 / The impact of cantilevers on biological and technical success outcomes of implant-supported fixed partial dentures. A retrospective cohort study / Clin Oral Implants Res 25:175~184
Romeo E / 2003 / Implant-supported fixed cantilever prostheses in partially edentulous arches. A seven-year prospective study / Clin Oral Implants Res 14:303~311
Hälg GA / 2008 / Bone level changes at implants supporting crowns or fixed partial dentures with or without cantilevers / Clin Oral Implants Res 19:983~990
Stegaroiu R / 1998 / Influence of restoration type on stress distribution in bone around implants : a three-dimensional finite element analysis / Int J Oral Maxillofac Implants 13:82~90
Kim P / 2014 / The impact of cantilevers on biological and technical success outcomes of implant-supported fixed partial dentures. A retrospective cohort study / Clin Oral Implants Res 25:175~184
Romeo E / 2003 / Implant-supported fixed cantilever prostheses in partially edentulous arches. A seven-year prospective study / Clin Oral Implants Res 14:303~311
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