聚乳酸可吸收根管桩膜修复残根的抗折力研究与临床应用

发布时间：2018-06-26 19:17

本文选题：聚乳酸 + 可吸收根管桩膜　；参考：《广西医科大学》2014年硕士论文

【摘要】：第一部分聚乳酸可吸收根管桩膜修复残根的抗折力研究目的：探讨聚乳酸可吸收根管桩膜修复残根后的抗折力。方法：将24颗离体下颌前磨牙随机分成3组，，每组8颗，分别采用聚乳酸可吸收根管桩、玻璃纤维桩及复合树脂短桩进行树脂冠修复，采用电子万能材料测验机对试件进行抗折力测试，记录试件抗折力值，观察折裂模式。3组间抗折力比较采用单因素方差分析，两两比较采用LSD检验，采用双侧检验，检验水准α=0.05。结果：LSD检验结果显示，聚乳酸可吸收根管桩组与玻璃纤维桩组的抗折力无统计学差异（P=0.530），均低于复合树脂短桩组（P=0.004，0.016）。3组试件的折裂模式均为有利性牙折模式。结论：聚乳酸可吸收根管桩膜修复残根后的抗折力能满足临床需要。第二部分聚乳酸可吸收根管桩膜修复婴幼儿乳牙残根的病例分析目的：评价聚乳酸可吸收根管桩膜修复婴幼儿乳牙残根的效果。方法：选择7例婴幼儿19颗乳上前牙残根，在全身麻醉下对其进行常规根管治疗，采用聚乳酸可吸收根管桩膜辅助固位，光固化复合树脂功能性修复乳上前牙形态。患儿每3个月复查，设计观察至乳牙自然脱落。复查时检查患儿口腔卫生状况、牙龈健康状况及患牙修复体情况，评价聚乳酸可吸收桩膜结合复合树脂修复乳牙残根的效果；通过X线检查，观察聚乳酸桩膜与乳牙根吸收情况，以及继承恒牙发育情况。结果：聚乳酸可吸收根管桩膜修复婴幼儿乳牙残根12个月后，13颗修复体保存，保存率为68.42%；同期X线片复查显示聚乳酸可吸收根管桩膜与牙根同步吸收，恒牙胚发育未见异常。结论：聚乳酸可吸收根管桩膜修复婴幼儿乳牙残根的近期效果良好，远期效果需进一步研究。
[Abstract]:Part I study on the flexural strength of Polylactic Acid Absorbable Root pile membrane for repairing residual Root objective: to study the flexural strength of Polylactic acid absorbable root canal post membrane for repairing residual root. Methods: 24 mandibular premolars in vitro were randomly divided into 3 groups, 8 in each group, and were repaired with resin crown with polylactic acid absorbable root canal post, glass fiber post and composite resin short post respectively. An electronic universal material tester was used to test the flexural strength of the specimens. The values of the flexural strength of the specimens were recorded. The analysis of variance (ANOVA) was used to observe the fracture mode of group .3, the LSD test was used for the two groups, and the double side test was used to test the leveling 伪 0.05. Results the results of WLSD test showed that there was no significant difference in the flexural strength between the Polylactic acid absorbable root canal pile group and the glass fiber pile group (P0. 530), which was lower than that in the composite resin short pile group (P0. 004 + 0. 016). Conclusion: Polylactic acid absorbable root canal post membrane can meet the clinical requirement after repairing residual root. The second part: the case analysis of residual root restoration of infant deciduous teeth with polylactic acid absorbable root canal post membrane objective: to evaluate the effect of polylactic acid absorbable root canal post membrane on the restoration of residual root of infant deciduous teeth. Methods: the residual root of 19 primary anterior teeth of 7 infants were treated with conventional root canal under general anesthesia. Polylactic acid absorbable root canal post membrane was used to assist retention and light curing composite resin was used to repair the morphology of primary anterior teeth. The children were reexamined every 3 months and the deciduous teeth were observed naturally. To evaluate the effect of polylactic acid absorbable pile membrane combined with composite resin in repairing residual root of deciduous teeth, the oral health status, gingival health status and restoration of affected teeth were examined during reexamination. To observe the absorption of polylactic acid post membrane and root of deciduous teeth and the development of inherited permanent teeth. Results: after 12 months of restoration of residual root of infant deciduous teeth with polylactic acid absorbable root canal post membrane, the preservation rate was 68.42, and X-ray examination showed that polylactic acid absorbable root canal post membrane was absorbed simultaneously with root, and the development of permanent tooth germ was not abnormal. Conclusion: Polylactic acid (PLA) can be used to repair residual root of deciduous teeth in infants.
【学位授予单位】：广西医科大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R781.05

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