三种桩核系统修复残根的抗折性能比较

发布时间：2018-07-20 12:31

【摘要】：目的:探讨不同材质桩核修复对薄弱残根抗折性能的影响。方法:54颗离体下颌前磨牙分为牙本质肩领1 mm组、2 mm组和无肩领对照组,组内再分为3组,每组6颗样本牙,每组分别用铸造金属桩核、预成玻璃纤维桩+复合树脂桩核、二氧化锆瓷桩核修复后再进行全冠修复。测定各样本牙的疲劳强度,采用SPSS 13.0软件包对实验结果进行双因素方差分析。结果:在肩领高度相同的条件下,3种桩核修复后牙的疲劳强度为:纤维桩核瓷桩核金属桩核(P0.05)。预备牙本质肩领可显著提高3种材质桩核修复牙的疲劳强度(P0.05)。结论:纤维桩抗疲劳强度优于铸造金属桩和瓷桩,折裂模式均表现可二次修复类型,有利于剩余牙根的保存。随着牙体剩余量的增加,修复体的抗折能力也增加。
[Abstract]:Objective: to investigate the effect of different materials of post and core restoration on the flexural properties of weak residual roots. Methods 54 mandibular premolars in vitro were divided into 2 mm group and 2 mm group with 1 mm dentine shoulder collar and control group without shoulder collar. The two groups were divided into 3 groups, 6 teeth in each group. Each group was treated with cast metal post core and preformed glass fiber post composite resin post core. Zirconia porcelain post and core were repaired with full crown. The fatigue strength of each tooth was measured and the results were analyzed by using SPSS 13.0 software package. Results: under the condition of the same height of shoulder and collar, the fatigue strength of the three kinds of post and core prosthesis was as follows: fiber post and porcelain post core metal post and core (P0.05). Preparation of dentin shoulder collar could significantly increase the fatigue strength of the teeth repaired by three kinds of materials (P0.05). Conclusion: the fatigue strength of fiber pile is better than that of cast metal post and porcelain pile, and the fracture mode can be repaired twice, which is beneficial to the preservation of residual root. With the increase of the residual amount of tooth, the flexural strength of the prosthesis also increased.
【作者单位】：韶关学院医学院口腔科;
【基金】：广东省医学科研基金项目(编号:A2012698) 韶关市创新资金项目(编号:2060502)
【分类号】：R783.3

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