探究聚醚醚酮桩核抗折性和修复后牙根抗折性  

To investigate the flexility of the post core and the root after restoration

作　　者：修朝博 储茂然 刘娟[1] 孙宇[1] XIU Zhaobo;CHU Maoran;LIU Juan;SUN Yu(Department of Proshodontics,the First Afiliated Hospitad of Harbin Medical University,Harbin 150007)

机构地区：[1]哈尔滨医科大学附属第一医院,150007

出　　处：《现代口腔医学杂志》2024年第2期112-117,共6页Journal of Modern Stomatology

基　　金：哈尔滨医科大学附属第一医院横向课题(_XFF1A_1502562998)。

摘　　要：目的比较三种材料(钴铬合金;聚醚醚酮;纤维桩)的抗折性及其作为桩核材料修复下颌单根前磨牙后牙根的抗折性,探究聚醚醚酮桩核的抗折性是否能满足临床需求。方法将三组不同材料的桩包埋在树脂块中,每组各8根,用万能力学试验机检测最大负载值并记录。将49颗下颌单根前磨牙根据所用材料和牙本质肩领高度(1mm;1.5mm)不同随机分为七组,桩核冠修复、包埋后在万能材料力学试验机上测出最大负载值并观察破坏模式。结果单纯材料抗折性对比中,聚醚醚酮组的最大负载值介于另外两组之间,与另外两组的差异均有统计学意义(P<0.05)。三种材料作为桩核材料修复下颌单根前磨牙后各组牙根的抗折性对比中,聚醚醚酮组与纤维桩组的最大负载值差异有统计学意义(P<0.05),与钴铬合金组的最大负载值差异无统计学意义(P>0.05)。聚醚醚酮组多为可修复性破坏。结论聚醚醚酮桩核的抗折性能满足临床需求且修复后发生不可修复性根折的概率较小。Objective Compare the bending resistance of three materialscobalt-chromium alloy,Polyether ether ketone,and fiber post-both in their pure form and as post-core materials for the restoration of the roots of mandibular single premolars.The objective of this study is to investigate whether the flexural resistance of the post-core material made of polyether ether ketone meets clinical requirements for dental restoration.Methods Three sets of piles made of different materials were embedded in the resin blocks,with eight piles in each set.The maximum load values of these piles were then measured using a universal mechanical testing machine and recorded.Forty-nine mandibular premolar teeth with single roots were randomly assigned to seven groups based on the material used and the height of the dentine shoulder collar(1 mm;1.5 mm).After the post-core-crown restoration and embedding,the maximum load value was measured on the universal material testing machine,and then the failure mode was observed.Results During the comparison of the bending resistance of pure materials,it was observed that the maximum load value of the polyether ether ketone group fell between the other two groups,and a statistically significant difference was found when compared to the other two groups(P<0.05).After using three materials as post-core materials to restore the mandibular single premolar,in the comparison of the resistance to fracture of each group of teeth roots,the maximum load value of the polyether ether ketone group and the fiber post group were statistically different from each other(P<0.05),and there was no statistical difference between the maximum load value of the polyether ether ketone group and that of cobalt-chromium alloy group(P>0.05).The majority of damage in the polyether ether ketone group is repairable.Conclusion The flexural resistance of the polyether ether ketone post core is sufficient for clinical requirements,and the likelihood of irreparable root fractures after restoration with a polyether ether ketone post core

关 键 词：桩核 抗折性 聚醚醚酮 牙本质肩领 

分 类 号：R783.1[医药卫生—口腔医学]