CAJ | 학술논문

生物材料%生物材料学术探讨%三维有限元%单端固定桥%双端固定桥%种植体%牙列缺损%最大等效应力值%最小安全系数%其他基金生物材料%生物材料學術探討%三維有限元%單耑固定橋%雙耑固定橋%種植體%牙列缺損%最大等效應力值%最小安全繫數%其他基金
생물재료%생물재료학술탐토%삼유유한원%단단고정교%쌍단고정교%충식체%아렬결손%최대등효응력치%최소안전계수%기타기금
biomaterials%biomaterial academic discussion%three-dimensional finite element%cantilever fixed partial denture%rigidly fixed bridge%implants%dentition defect%maximum equivalent stress%minimum safety coefficient%other grants-supported paper

背景:单端固定桥在临床修复牙列缺损时,对于种植体和桥体的数量、位置以及受力情况方面还存在一些争议. 目的:通过三维有限元方法分析前牙区单端固定桥的受力情况. 方法:应用计算机模拟三维有限元的方法,对种植体支持的固定义齿进行有限元分析,不同数量种植体以及种植体位于固定桥不同位置时,种植体及其周围骨组织的应力应变情况,为临床提供指导意义. 结果与结论:①当加载力量及角度相同的情况下,随种植体数量减少或桥体长度增加,种植体及周围骨质的最大等效应力值逐渐增大,最小安全系数逐渐减小.当加载角度为22.5°时,种植体及周围骨质的最大应力值最小,最小安全系数为所有加载角度的最大,随着角度的继续增大,种植体及周围骨质的最大应力逐渐增大,最小安全系数又逐渐减小.②单端桥修复前后应力分布不均,基牙骨支持组织的应力均集中于其颈部.③3个单位缺牙区域,基牙数越多,修复成功率越高.合理选择单端固定桥和双端固定桥的修复设计是治疗成功的关键.
배경:단단고정교재림상수복아렬결손시,대우충식체화교체적수량、위치이급수력정황방면환존재일사쟁의. 목적:통과삼유유한원방법분석전아구단단고정교적수력정황. 방법:응용계산궤모의삼유유한원적방법,대충식체지지적고정의치진행유한원분석,불동수량충식체이급충식체위우고정교불동위치시,충식체급기주위골조직적응력응변정황,위림상제공지도의의. 결과여결론:①당가재역량급각도상동적정황하,수충식체수량감소혹교체장도증가,충식체급주위골질적최대등효응력치축점증대,최소안전계수축점감소.당가재각도위22.5°시,충식체급주위골질적최대응력치최소,최소안전계수위소유가재각도적최대,수착각도적계속증대,충식체급주위골질적최대응력축점증대,최소안전계수우축점감소.②단단교수복전후응력분포불균,기아골지지조직적응력균집중우기경부.③3개단위결아구역,기아수월다,수복성공솔월고.합리선택단단고정교화쌍단고정교적수복설계시치료성공적관건.
@@@@BACKGROUND:There are stil some controversies for the number, position as wel as the force of the implants and the bridge during the clinical repairing of dentition defects with cantilever fixed partial denture. @@@@OBJECTIVE:To analyze the force conditions of anterior region cantilever fixed partial denture with three-dimensional finite element. @@@@METHODS:The computer was used to simulate the three-dimensional finite element method to analyze the implant-supported fixed dentures, as wel as the stress and strain status of implants and surrounding bone tissues with different numbers and different positions of implants located on the cantilever fixed partial denture, in order to provide guiding significance for the clinical application. @@@@RESULTS AND CONCLUSION:When implanted with the same load force and load angle, the maximum equivalent stress of the implants and the surrounding bone was gradual y increased with the reducing of the implant number and the increasing of the bridge length, and the minimum safety coefficient was decreased gradual y. When the load angle was 22.5°, implants and the surrounding bone showed the lowest maximum stress, and the minimum safety coefficient was highest. With the increasing of the load angle, the maximum stress of the implants and the surrounding bone was increased gradual y, and the minimum safety coefficient was decreased. The distribution of the stress was uneven before and after repaired with cantilever fixed partial denture, and stress distribution in supporting bone of abutment mainly concentrated in neck. For the three units of edentulous area, the success rate of repairing was positively correlated with the number of abutment. Reasonable choice of cantilever fixed partial denture and rigidly fixed bridge is the key for the successful of the treatment.