Jayasenthil Adhikesavan, Solomon-Sathish Emmanuel, Venkatalakshmi-Aparna Potluri, Balagopal Sunderasan
MDS, Reader, Department of Conservative Dentistry and Endodontics, Adhiparasakthi Dental College and Hospital, Melmaruvathur, Tamilnadu, India.
MDS, Professor, Department of Conservative Dentistry and Endodontics, Rajah Muthiah Dental College and Hospital, Chidambaram.
J Clin Exp Dent. 2016 Feb 1;8(1):e44-8. doi: 10.4317/jced.52491. eCollection 2016 Feb.
The purpose of this study was to relate the fracture resistance of endodontically treated teeth in relation to post geometry.
Forty single rooted mandibular premolars were instrumented by step - back technique and obturated by lateral condensation. Forty teeth were randomly divided into four groups: Reforpost glass fiber X-ray®, RelyX®, Exacto conical® and Parapost Fiber Lux®. The post spaces were prepared using respective drills and luted. The core build up was done and metal crowns were luted. Fracture resistance was determined in universal testing machine. The statistical analysis was done using one way ANOVA and post hoc Tukey Kramer test.
The teeth restored with Reforpost showed highest fracture resistance followed by Parapost and Exacto conical. The teeth restored with RelyX showed least fracture resistance. The teeth restored with Parapost had less unfavourable fracture followed by exacto conical.
Parallel design had less number of catastrophic failure and had better fracture resistance.
Fracture resistance, glass fiber post, post geometry, stress.
本研究的目的是探讨根管治疗后牙齿的抗折性能与桩形态之间的关系。
40颗单根下颌前磨牙采用逐步后退技术进行根管预备，侧方加压充填。40颗牙齿随机分为四组：Reforpost玻璃纤维X射线桩、RelyX桩、Exacto锥形桩和Parapost Fiber Lux桩。使用相应的钻针制备桩道并粘结桩。进行核桩修复并粘结金属全冠。在万能试验机上测定抗折性能。采用单因素方差分析和事后Tukey Kramer检验进行统计学分析。
使用Reforpost桩修复的牙齿抗折性能最高，其次是Parapost桩和Exacto锥形桩。使用RelyX桩修复的牙齿抗折性能最低。使用Parapost桩修复的牙齿出现不良折裂的情况较少，其次是Exacto锥形桩。
平行设计的灾难性失败数量较少，抗折性能更好。
抗折性能；玻璃纤维桩；桩形态；应力
