不同纤维桩表面处理方式对牙根修复后抗折裂强度的影响  

Effects of Different Surface Treatment Methods of Fiber Post on the Fracture Resistance after Teeth Root Repair

作　　者：冯嵩[1] 陈尔军[1] 宋明宇[1] 肖永芳[1] 刘静明[1] FENG Song;CHEN Er-jun;SONG Ming-yu;XIAO Yong-fang;LIU Jing-ming(Department of Stomatology,Beijing Tongren Hospital of Capital Medical University,Beijing,100023,China)

机构地区：[1]首都医科大学附属北京同仁医院口腔科,北京100023

出　　处：《现代生物医学进展》2020年第12期2258-2262,共5页Progress in Modern Biomedicine

基　　金：国家自然科学基金项目(81670989)。

摘　　要：目的:探讨不同纤维桩表面处理方式对牙根修复后抗折裂强度的影响。方法:收集行正畸拔除的前磨牙120颗作为本研究样本,随机将120个纤维桩分为对照组、喷砂组和过氧化氢酸蚀组,每组40例。对照组纤维桩表明不给予任何处理,喷砂组给予氧化铝砂粒持续喷砂粗化处理,过氧化氢酸蚀组给予10%过氧化氢溶液处理,均包埋于纤维桩道预备好的离体牙内,采用相同树脂制备成核,行全冠修复与黏固,再模拟口腔内部环境给予样本牙冷热循环处理,经相同环境加载后,置于电子万能实验机获取样本牙抗折裂强度数据。对比三组离体牙样本体型数据、离体牙断裂方式、抗折裂强度,对三组进行为期24个月的定期随访,统计三组修复体断裂率,并采用Kaplan-Meier曲线和Log Rank法分析三组的生存状况。结果:三组的离体牙样本关于牙齿长度、牙根长度、颈部颊舌径及颈部近远中径对比差异无统计学意义(P>0.05);喷砂组和过氧化氢酸蚀组的离体牙抗折裂强度显著强于对照组(P<0.05);喷砂组和过氧化氢酸蚀组的牙齿折裂总发生率分别为20.00%和22.50%,均显著低于对照组的70.00%(P<0.05)。但两组间比较差异无统计学意义(P>0.05)。喷砂组、过氧化氢酸蚀组的生存状况显著优于对照组。结论:前磨牙修复过程中,对纤维桩表面进行喷砂或过氧化氢酸蚀处理均能提高牙根修复后抗折裂强度,改善修复体修复效果生存状况,且两种纤维桩表面处理方式对离体牙样本的断裂方式和抗折裂强度影响相当。Objective: To investigate the effects of different surface treatment methods of fiber post on the fracture resistance after teeth root repair. Methods: 120 cases of premolars with orthodontic extraction were collected, 120 fiber posts were randomly divided into the control group, sandblasting group and hydrogen peroxide etching group, with 40 cases in each group. The control group was not given any treatment on the surface of fiber post, the sandblasting group was given alumina sand granules for continuous sandblasting and roughening, and the hydrogen peroxide etching group was treated with 10% hydrogen peroxide solution, and then embedded in the isolated teeth of the fiber post, given the same resin to prepare nucleation for complete coronal restoration and adhesion, and then they were given thermal-cold cycling treatment of sample teeth by simulating internal environment of oral cavity, and placed on an electronic universal testing machine to obtain the fracture resistance data of sample teeth after being loaded in the same environment. The body shape data of isolated teeth samples and fracture modes and fracture resistance of isolated teeth were compared among the three groups.The three groups were given 24 months of routine follow-up, and the fracture rate of restorations was counted in the three groups.Kaplan-Meier curve and Log Rank method was used to analyze the survival status in the three groups. Results: There was no significant difference in the teeth length, length of teeth root, diameter of neck buccal tongue and mesio-distal diameter of neck among the three groups(P>0.05). The fracture resistance of isolated teeth in the sandblasting group and hydrogen peroxide etching group were significantly stronger than that in the control group(P<0.05). The total incidence rate of teeth fracture was 20.00% in the sandblasting group and 22.50% in the hydrogen peroxide etching group, which were significantly lower than that in control group(70.00%, P<0.05).However, there was no significant difference between the

关 键 词：纤维桩 喷砂处理 过氧化氢酸蚀处理 牙根修复 抗折裂强度 

分 类 号：R783.4[医药卫生—口腔医学]