상악 전치부 즉시하중 임플란트의 식립 깊이에 따른 삼차원 유한요소 분석
Three-dimensional finite element analysis according to the insertion depth of an immediately loaded implant in the anterior maxilla
박철우, 김성훈, 여인성, 윤형인, 한중석,
소속 상세정보
박철우 ( Park Cheol-Woo ) - 서울대학교 치의학대학원 치과보철학교실
김성훈 ( Kim Sung-Hun ) - 서울대학교 치의학대학원 치과보철학교실
여인성 ( Yeo In-Seong ) - 서울대학교 치의학대학원 치과보철학교실
윤형인 ( Yoon Hyung-In ) - 서울대학교 치의학대학원 치과보철학교실
한중석 ( Han Jung-Suk ) - 서울대학교 치의학대학원 치과보철학교실
Abstract
Purpose: The purpose of this study was to investigate the effects of the insertion depth of an immediately loaded implant on the stress distribution of the surrounding bone and the micromovement of the implant using the three-dimensional finite element analysis.
Materials and methods: A total of five bone models were constructed such that the implant platform was positioned at the levels of 0.00 mm, 0.25 mm, 0.50 mm, 0.75 mm, and 1.00 mm depth from the crest of the cortical bone. A frictional coefficient of 0.3 and the insertion torque of 35 Ncm were simulated on the interface between the implant and surrounding bone. A static load of 178 N was applied to the provisional prosthesis with a vertical load in the axial direction and an oblique load at 30°with respect to the central axis of the implant, then a finite element analysis was performed.
Results: The implant insertion depth significantly affected the stress distribution on the surrounding bone. The largest micromovement value of the implant was 39.34 μm. The oblique load contributed significantly to the stress distribution and micromovement in comparison to the vertical load.
Conclusion: Increasing the implant insertion depth was advantageous in dispersing the concentrated stress in the cortical bone and did not significantly affect the micromovement associated with early osseointegration failure.
키워드
Dental implants; Immediate dental implant loading; Insertion depth; Finite element analysis
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