Cotert Hamit Serdar, Akcay Ilgin, Cotert Irem, Altinova Hepdurgun Ece
Department of Prosthodontics, Faculty of Dentistry, Ege University, Bornova, İzmir, Turkey.
Department of Endodontics, Faculty of Dentistry, Ege University, Bornova, İzmir, Turkey.
Clin Cosmet Investig Dent. 2021 Dec 29;13:541-552. doi: 10.2147/CCIDE.S345367. eCollection 2021.
A treatment protocol involving the root canal treatment with conventional palatal access cavity and the partial veneer application may considerably reduce the fracture resistance of the teeth. On the other hand, labial access cavity within the partial veneer outlines followed with the partial veneer application may more successfully recover the lost fracture resistance of the endodontically treated teeth. In this regard, the present study aims to compare the fracture resistances of upper central incisors endodontically treated with palatal and labial accesses and restored with restorative resin composite and lithium disilicate partial veneers.
Three groups consisting ten specimens each were prepared by using extracted sound human upper central incisors. Root canal treatments with palatal access, resin composite restoration of the access cavities and veneer restorations were applied to the first group (Group P). Root canal treatments with labial access, resin composite restoration of the access cavities and veneer restorations was applied to the second group (Group L). Veneer restorations were applied to the third group (Group C) without root canal treatment. Specimens were thermocycled and loaded to fracture in order to record their fracture resistances.
The mean fracture resistance of Group C was observed to be significantly higher, compared to Groups P and L (P < 0.05). Fracture resistance of Group L was observed to be higher, compared to Group P, but the difference was not found statistically significant. Light microscope revealed that the specimens fractured in five different modes.
Although the mean fracture resistance of the teeth that endodontically treated with labial access cavity prior to the ceramic partial veneer application was higher in comparison with the teeth that endodontically treated with palatal access cavity prior to the ceramic partial veneer application, the difference was found statistically insignificant (P < 0.05).
一种涉及传统腭侧入路根管治疗和部分贴面修复的治疗方案可能会显著降低牙齿的抗折性。另一方面，在部分贴面轮廓内采用唇侧入路并随后进行部分贴面修复，可能更成功地恢复经根管治疗牙齿丧失的抗折性。在这方面，本研究旨在比较经腭侧和唇侧入路根管治疗并用复合树脂和二硅酸锂部分贴面修复的上颌中切牙的抗折性。
使用拔除的健康人上颌中切牙制备三组样本，每组十个。第一组（P组）进行腭侧入路根管治疗、入路洞型的树脂复合修复和贴面修复。第二组（L组）进行唇侧入路根管治疗、入路洞型的树脂复合修复和贴面修复。第三组（C组）未进行根管治疗，仅进行贴面修复。对样本进行热循环处理并加载直至折断，以记录其抗折性。
观察到C组的平均抗折性明显高于P组和L组（P < 0.05）。观察到L组的抗折性高于P组，但差异无统计学意义。光学显微镜显示样本以五种不同模式折断。
尽管在应用陶瓷部分贴面之前经唇侧入路根管治疗的牙齿的平均抗折性高于经腭侧入路根管治疗的牙齿，但差异无统计学意义（P < 0.05）。
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