CAJ | 학술논문

背景：口腔种植修复中，种植体中基台角度的优化设计对骨吸收有重要影响，同时患者的高用力也对骨质的吸收重建有着重要影响。 　　目的：利用Ansys Workbench 13.0软件对上颌骨前牙区进行优化设计模型，探讨中切牙角度基台不同载荷对皮质骨和松质骨应力大小的影响。 　　方法：建立圆柱状V形螺纹种植体的上颌骨骨块三维有限元模型，设定基台角度为0°，5°，10°，15°，20°、25°，30°，设定加载应力为90，105，120，135，150，165，180，195，210 N。在种植体上模拟中切牙咬合，在修复体正中进行颊舌向力学加载，观察基台角度和加载应力变化对颌骨Von Mises应力峰值的影响。 　　结果与结论：单因素影响下，以基台角度为变量逐渐增加时，在唇腭侧向加载中皮质骨和松质骨的Von Mises应力峰值增幅分别为60.63%和69.30%；以加载应力为变量逐渐增加时，在颊舌向加载中皮质骨和松质骨的Von Mises应力峰值增幅分别为68.74%和69.30%。在基台角度和加载应力交互作用下，当加载应力小于150 N，同时基台角度小于25°时，对颌骨Von Mises应力峰值响应曲线的切线斜率位于-1至0之间。所以从力学分析看来，松质骨的应力大小更易受到基台角度和加载应力的影响，螺纹种植体最佳的基台角度设计应小于25°，咬合力应小于150 N。
배경：구강충식수복중，충식체중기태각도적우화설계대골흡수유중요영향，동시환자적고용력야대골질적흡수중건유착중요영향。 　　목적：이용Ansys Workbench 13.0연건대상합골전아구진행우화설계모형，탐토중절아각도기태불동재하대피질골화송질골응력대소적영향。 　　방법：건립원주상V형라문충식체적상합골골괴삼유유한원모형，설정기태각도위0°，5°，10°，15°，20°、25°，30°，설정가재응력위90，105，120，135，150，165，180，195，210 N。재충식체상모의중절아교합，재수복체정중진행협설향역학가재，관찰기태각도화가재응력변화대합골Von Mises응력봉치적영향。 　　결과여결론：단인소영향하，이기태각도위변량축점증가시，재진악측향가재중피질골화송질골적Von Mises응력봉치증폭분별위60.63%화69.30%；이가재응력위변량축점증가시，재협설향가재중피질골화송질골적Von Mises응력봉치증폭분별위68.74%화69.30%。재기태각도화가재응력교호작용하，당가재응력소우150 N，동시기태각도소우25°시，대합골Von Mises응력봉치향응곡선적절선사솔위우-1지0지간。소이종역학분석간래，송질골적응력대소경역수도기태각도화가재응력적영향，라문충식체최가적기태각도설계응소우25°，교합력응소우150 N。
BACKGROUND:To optimize the oral implant design in the abutment angle has an important effect on bone resorption, and meanwhile, the high bite force from patients is also crucial to rebuild bone absorption. OBJECTIVE:To optimize the model design of the maxilary anterior teeth using Ansys Workbench 13.0 software and to investigate the stress size on the cortical and cancelous bone from different angled abutments and different loads of the central incisor. METHODS:A three-dimensional finite element model of the V-shaped cylindrical threaded implants in the maxilary bone. Abutment angle was set as 0°, 5°, 10°, 15°, 20°, 25°, 30°, and the load stress was set as 90, 105, 120, 135, 150, 165, 180, 195, 210 N. Occlusion of the central incisor was simulated on the implants, and then, buccolingual mechanical loads were loaded on the center of prostheses to observe the effects of different abutment angles and loads on the Von Mises peak stress of the maxila and mandible. RESULTS AND CONCLUSION:Under the influence of a single factor, when the abutment angles acted as variables, the Von Mises peak stress of the cortical and cancelous bone was respectively increased by 60.60% and 69.30% under labial or palatal loads; when the loading stress acted as variables, the Von Mises peak stress of the cortical and cancelous bone was increased by 68.74% and 69.30% under buccolingual loads. When the loading stress was less than 150 N and the abutment angle was less than 25°, the slop of tangent for the mandible Von Mises stress response curve was-1 to 0. It seems from the mechanical analysis that the stress of cancelous bone is more susceptible to abutment angle and load stress; the optimal abutment of screwed implant should be designed to an angle less than 25° and an bite force less than 150 N.