CAJ | 학술논문

背景:研究表明口腔的日常咀嚼功能会对纤维桩核修复体的抗折性能产生影响.目的:评价石英纤维桩复合树脂核全冠修复的下颌前磨牙的疲劳抗性.方法:将正畸拔除的44颗单根前磨牙分为实验组和对照组,每组22颗,离体牙行石英纤维桩复合树脂核金属烤瓷冠修复,实验组行频率为6 Hz、次数为120万次的45°循环加载,对照组不进行循环加载,然后两组分别行速率为1 mm,min的45°侧向加载.记录牙根出现折裂时的破坏力值、牙根的折裂模式以及桩核脱位情况.结果与结论:实验组和对照组的抗荷载力均值分别为(733.88±254.99)N和(869.14±280-26)N,两组之间差异无显著性意义(P>0.05).实验组有1例垂直根折,其余均为可修复性根折,两组未见桩核脱位现象.说明石英纤维复合树脂桩核系统修复后的离体牙整体疲劳抗性优异.
배경:연구표명구강적일상저작공능회대섬유장핵수복체적항절성능산생영향.목적:평개석영섬유장복합수지핵전관수복적하합전마아적피로항성.방법:장정기발제적44과단근전마아분위실험조화대조조,매조22과,리체아행석영섬유장복합수지핵금속고자관수복,실험조행빈솔위6 Hz、차수위120만차적45°순배가재,대조조불진행순배가재,연후량조분별행속솔위1 mm,min적45°측향가재.기록아근출현절렬시적파배력치、아근적절렬모식이급장핵탈위정황.결과여결론:실험조화대조조적항하재력균치분별위(733.88±254.99)N화(869.14±280-26)N,량조지간차이무현저성의의(P>0.05).실험조유1례수직근절,기여균위가수복성근절,량조미견장핵탈위현상.설명석영섬유복합수지장핵계통수복후적리체아정체피로항성우이.
BACKGROUND: Studies demonstrate that there are some effects of oral masticatory function on the fracture resistance ability of the fiber post-core prosthesis.OBJECTIVE: To evaluate the fatigue resistance of lower premolars restored with quartz-fiber post-core and full crown. METHODS: Totally 44 single rooted lower premolars recently extracted from orthodontic patients were divided into the experimental and the control groups, with 22 teeth in each group. All the teeth were restored with fiber post-core and full crown. In the experimental group, loads were applied at an 45 to the long axis of the teeth with a cyclic loading at a 6 Hz frequency, and then both two groups were loaded at an 45 to the long axis of the teeth at a crosshead speed of 1 mm/min. The destructive force values, the fracture mode of root and the situation of post-core dislocation with root fracture were recorded.RESULTS AND CONCLUSION: The mean loading force was (733.88N 254.99) N and (869.14N 280.26) N in the experimental group and the control group, respectively, and there was no significant difference in two groups (P> 0.05). The experimental group had one case with vertical root fracture, the others had repairable root fracture and the dislocation of post-core did not happen in the two groups. The results demonstrated that there is a good fatigue resistance in the removed teeth with quartz-fiber post-core and full crown.