Biomechanical analysis of different bone grafting locations and dimensions on anterior maxillary dental implants

• Main Authors: Po-Yu Lai, 賴柏聿
• Other Authors: Ming-Lun Hsu
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/05730918196260649679

碩士 === 國立陽明大學 === 臨床牙醫學研究所 === 99 === The biomechanical effects of functional loading on grafted bone around anterior maxillary implants remains controversial. The purpose of this study is to compare the biomechanical effects of different bone grafting locations and dimensions on anterior maxillary dental implants with three types of abutment angulations. 3-D finite element models with three different locations (cervical, middle and apical area) and three different dimensions (small, moderate and severe type) of grafted bone placed in buccal surface of a maxillary dental implant were constructed. Simulating occlusal force (178N) on three types of abutment (straight, 15-degree, 25-degree pre-angled) with an angle of 130-degree to abutment’s long axis was applied to investigate stress/strain distribution. Results of study revealed regardless of abutment angulations, grafted bone in implant cervical area demonstrates greatest stress/strain among different locations. Grafted bone both in implant middle and apical area reveals the same pattern and value of stress/strain as control model. Increasing dimensions of bone defect demonstrates little influence on stress/strain distribution and value. However both stress and strain of overall implant–bone system increased as abutment angulation increased. Moreover, the stress/strain among models of grafted bone in implant cervical area increased more than the other models. Within the limitation of this FEA study, the following conclusions can be drawn: 1. grafted bone in implant cervical area demonstrates greatest stress/strain among different locations. 2. dimension of graft material possessed only little influence of stress/strain distribution on both surrounding bone as well as graft material itself. 3. pre-angled abutment should be avoided when bone graft was placed in implant cervical area.