牙体缺损类型与纤维桩位置对桩核冠修复上颌前磨牙抗折性能的影响  

Influence of remaining coronal tooth structure and fiber post location on the fracture resistance of restored endodontically treated maxillary premolars

作　　者：陈春霞[1] 张亚东 柯研 米靖 阳桂芳 石韶青 王永生[1] CHEN Chunxia;ZHANG Yadong;KE Yan;MI Jing;YANG Guifang;SHI Shaoqing;WANG Yongsheng(Tianjin Stomatological Hospital,The Affiliated Stomatological Hospital of Nankai University,300040,China;School of Medicine,Nankai University,Tianjin)

机构地区：[1]天津市口腔医院,南开大学附属口腔医院,300040 [2]南开大学医学院

出　　处：《实用口腔医学杂志》2024年第6期860-863,共4页Journal of Practical Stomatology

基　　金：天津市口腔功能重建重点实验室青年项目(编号:2021KLQN06)。

摘　　要：纳入120颗离体上颌前磨牙分成5组(每组24颗),制备360°牙本质肩领(A组)、颊侧180°牙本质肩领(B组)、腭侧180°牙本质肩领(C组)、远中180°牙本质肩领(D组)、近中180°牙本质肩领(E组),分别用树脂核+全冠修复、颊侧根管纤维桩+树脂核+全冠修复、腭侧根管纤维桩+树脂核+全冠修复、颊、腭侧根管纤维桩+树脂核+全冠修复。结果显示:A组样本牙的抗折破坏载荷值高于B、C、D、E组(P<0.05),颊侧根管置入纤维桩抗折强度高于腭侧(P<0.05)。提示360°完整牙本质肩领能提供最佳的抗折强度,牙本质肩领不完整时,推荐置入颊侧根管纤维桩修复。120 extracted maxillary first premolars were endodontically treated and randomly divided into 5 groups(n=24).The teeth in group A had 4 walls of coronal tooth structure,in group B,C,D and E had only 3 walls,missing the palatal,buccal,mesial and distal wall,respectively.The teeth in group A0-E0(n=6)were restored without post,in group A1-E1(n=6)with buccal post,in group A2-E2(n=6)with palatal post,in group A3-E3(n=6)with buccal and palatal post,respectively.The fracture resistance of group A was higher than that of B,C,D and E groups(P<0.05).The fracture resistance of fiber posts placed in the buccal root canal was higher than that in the palatal root canal(P<0.05).The 360°complete ferrule can provide the best fracture resistance,When the ferrule is not complete,it is recommended to place buccal fiber post for repair.

关 键 词：牙本质肩领 纤维桩 根管治疗 抗折强度 

分 类 号：R783.3[医药卫生—口腔医学]