CAJ | 학술논문

目的探讨植入位点不同时颧骨种植义齿种植体-骨界面的应力分布规律.方法计算机模拟建立上颌后牙区重度萎缩三维有限元模型,分别在第一前磨牙区、第二前磨牙区、第一磨牙区和第二磨牙区模拟颧骨种植义齿修复.进行垂直向、颊向30°和舌向30°加载100 N,统计分析植入位点不同时颧骨种植义齿种植体-骨界面的应力.结果 1)第一前磨牙区颧骨种植体颊侧暴露较多,与临床不符.2)上颌后牙区拉应力峰值比较:选择第二磨牙区植入时最大,第二前磨牙区次之,第一磨牙区最小.上颌后牙区压应力峰值比较:选择第二磨牙区植入时最大,第一磨牙区次之,第二前磨牙区最小.颧骨区拉应力及压应力峰值比较:选择第二前磨牙区植入时最大,第一磨牙区次之,第二磨牙区最小.结论选择第一磨牙区颧骨种植义齿修复较好.
목적 탐토식입위점불동시권골충식의치충식체-골계면적응력분포규률.방법 계산궤모의건립상합후아구중도위축삼유유한원모형,분별재제일전마아구、제이전마아구、제일마아구화제이마아구모의권골충식의치수복.진행수직향、협향30°화설향30°가재100 N,통계분석식입위점불동시권골충식의치충식체-골계면적응력.결과 1)제일전마아구권골충식체협측폭로교다,여림상불부.2)상합후아구랍응력봉치비교:선택제이마아구식입시최대,제이전마아구차지,제일마아구최소.상합후아구압응력봉치비교:선택제이마아구식입시최대,제일마아구차지,제이전마아구최소.권골구랍응력급압응력봉치비교:선택제이전마아구식입시최대,제일마아구차지,제이마아구최소.결론 선택제일마아구권골충식의치수복교호.
Objective To probe the implant-bone-interface stress distribution of zygomatic implant denture con cerning different implant sites. Methods Three-dimensional finite element model for severe atrophy maxillary posterior tooth area was established biomechanically in this study by computer technique and zygomatic implant was simulated into the model in the first-maxillary-premolar region, the second-maxillary-premolar region, the first-maxillary-molar region and the second-maxillary-molar region respectively. Vertical loading, buccal(30°) loading and lingual (30°) loading were preformed, 100 N. Then these load cases were calculated and analyzed. Results 1)When the implant site was placed in the first-maxillary-premolar region, the buccal side of zygomatic implant exposed out of the bone and didn't meet the clinical request. 2)As far as the tensile stress peak value in the maxillary posterior-tooth area was concerned, the highest value was recorded when the implant was placed in the second-maxillary-molar region, and then the medium value was recorded when the implant was placed in the second-maxillary-premolar region, and the smallest was recorded when the implant in the first-maxillary-molar region. As far as the compressive stress peak value in the maxillary posterior-tooth area was concerned, the highest value was recorded when the implant was placed in the second-maxillary-molar region, and then the medium was recorded when the implant was in the first maxillary-molar region, and the smallest value was presented when the implant was in the second-maxillary-premolar region. As far as the tensile and compressive stress peak values in the zygomatic area were concerned, the highest value was recorded when the implant was in the second-maxillary-premolar region, and then the medium value when the implant was in the first-maxillary-molar region, and the smallest when the implant was in the second-maxillary molar region. Conclusion The first-maxillary-molar region is the best implant site of zygomatic implant denture.