치조골 폭경과 임플랜트 고정체의 직경에 따른 지지조직의 응력분포
Stress analysis of supporting tissues according to implant fixture diameter and residual alveolar bone width
한상운, 박상원, 양홍소, 방몽숙, 박하옥, 임현필,
소속 상세정보
한상운 ( Han Sang-Un ) - 전남대학교 치의학전문대학원 치과보철학교실
박상원 ( Park Sang-Won ) - 전남대학교 치의학전문대학원 치과보철학교실
양홍소 ( Yang Hong-So ) - 전남대학교 치의학전문대학원 치과보철학교실
방몽숙 ( Vang Mong-Sook ) - 전남대학교 치의학전문대학원 치과보철학교실
박하옥 ( Park Ha-Ok ) - 전남대학교 치의학전문대학원 치과보철학교실
임현필 ( Lim Hyun-Pil ) - 전남대학교 치의학전문대학원 치과보철학교실
KMID : 0362420070450040506
Abstract
Statement of problem: The cumulative success rate of wide implant is still controversial. Some previous reports have shown high success rate, and some other reports shown high failure rate.
Purpose: The aim of this study was to analyze, and compare the biomechanics in wide implant system embeded in different width of crestal bone under different occlusal forces by finite element approach.
Material and methods: Three-dimensional finite element models were created based on tracing of CT image of second premolar section of mandible with one implant embedded. One standard model (6mm-crestal bone width, 4.0mm implant diameter central position) was created. Varied crestal dimension(4, 6, 8 mm), different diameter of implants(3.3, 4.0, 5.5, 6.0mm), and buccal position implant models were generated. A 100-N vertical(L1) and 30 degree oblique load from lingual(L2) and buccal(L3) direction were applied to the occlusal surface of the crown. The analysis was performed for each load by means of the ANSYS V.9.0 program.
Conclusion: 1. In all cases, maximum equivalent stress that applied 30? oblique load around the alveolar bone crest was larger than that of the vertical load. Especially the equivalent stress that loaded obliquely in buccal side was larger. 2. In study of implant fixture diameter, stress around alveolar bone was decreased with the increase of implant diameter. In the vertical load, as the diameter of implant increased the equivalent stress decreased, but equivalent stress increased in case of the wide implant that have a little cortical bone in the buccal side. In the lateral oblique loading condition, the diameter of implant increased the equivalent stress decreased, but in the buccal oblique load, there was not significant difference between the 5.5mm and 6.0mm as the wide diameter implant. 3. In study of alveolar bone width, equivalent stress was decreased with the increase of alveolar bone width. In the vertical and oblique loading condition, the width of alveolar bone increased 6.0mm the equivalent stress decreased. But in the oblique loading condition, there was not a difference equivalent stress at more than 6.0mm of alveolar bone width. 4. In study of insertion position of implant fixture, even though the insertion position of implant fixture move there was not a difference equivalent stress, but in the case of little cortical bone in the buccal side, value of the equivalent stress was most unfavorable. 5. In all cases, it showed high stress around the top of fixture that contact cortical bone, but there was not a portion on the bottom of fixture that concentrate highly stress and play the role of stress dispersion. These results demonstrated that obtaining the more contact from the bucco-lingual cortical bone by installing wide diameter implant plays an important role in biomechanics.
키워드
Stress analysis;Implant fixture diameter;Residual alveolar bone width
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