Patil Prasad, Newase Pooja, Pawar Swapnil, Gosai Hasmukh, Shah Dharmendra, Parhad Sameer M
Department of Endodontics, Al Ameen Dental College, Bijapur, IND.
Department of Conservative Dentistry and Endodontics, Dr. D.Y. (Dnyandeo Yashwantra) Patil Dental College and Hospital, Pune, IND.
Cureus. 2022 Aug 17;14(8):e28090. doi: 10.7759/cureus.28090. eCollection 2022 Aug.
Endodontic access cavity preparation plays a vital role as preservation of enamel structure is of utmost importance for a tooth's strength to be maintained. As teeth become fragile after a root canal therapy, this study was designed to compare in vitro the fracture resistance of root-filled and restored teeth with traditional endodontic access cavity, conservative endodontic access cavity (CEC), ninja endodontic access cavity (NEC), and truss endodontic access cavity (TEC).
Control (intact teeth) and traditional endodontic access cavity as well as CEC, NEC, and TEC groups were each given a new human mandibular molar that was freshly removed. Cone beam computed tomography (CBCT) scans of the cone beam showed the values of CEC, NEC, and TEC. After that the teeth were endodontically treated and repaired. To test the specimens, universal testing equipment was used. In order to avoid tooth breakage, the maximum load was determined. Statistical analysis was used in the form of Kolmogorov-Smirnov and Levene tests, which were used to examine data for typical dispersion and consistency in change.
Intact teeth showed the highest resistance to fracture compared with other groups. TEC showed significantly higher resistance to fracture compared to the CEC design.
It is possible, within the restrictions of this research, to infer that the TEC design enhanced tooth fracture strength in comparison with the CEC design.
牙髓治疗开髓洞形预备起着至关重要的作用，因为保留牙釉质结构对于维持牙齿强度至关重要。由于根管治疗后牙齿会变脆弱，本研究旨在体外比较采用传统牙髓治疗开髓洞形、保守牙髓治疗开髓洞形（CEC）、忍者牙髓治疗开髓洞形（NEC）和桁架牙髓治疗开髓洞形（TEC）的根管充填和修复牙齿的抗折性。
对照组（完整牙齿）以及传统牙髓治疗开髓洞形组、CEC组、NEC组和TEC组，每组均给予一颗新拔除的人类下颌第一磨牙。锥形束计算机断层扫描（CBCT）显示了CEC、NEC和TEC的值。之后对牙齿进行根管治疗和修复。为测试标本，使用了万能测试设备。为避免牙齿折断，确定了最大负荷。采用Kolmogorov-Smirnov检验和Levene检验进行统计分析，用于检验数据的典型离散度和变化一致性。
与其他组相比，完整牙齿显示出最高的抗折性。与CEC设计相比，TEC显示出显著更高的抗折性。
在本研究的限制范围内，可以推断与CEC设计相比，TEC设计提高了牙齿的抗折强度。
