Moyin Shabna, Chaturvedi Saurabh, Alqahtani Nasser M, Shariff Mansoor, Abdelmonem Adel M, Alfarsi Mohammed A
Department of Conservative Dentistry and Endodontics, Sree Anjaneya Institute of Dental Sciences, Calicut, Kerala, India.
Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi Arabia.
J Pharm Bioallied Sci. 2019 May;11(Suppl 2):S236-S239. doi: 10.4103/JPBS.JPBS_306_18.
This study aimed to evaluate the fracture resistance strength of different post systems in endodontically treated teeth.
Freshly extracted 60 single-rooted first premolars were selected for this study. Conventional step-back technique was used to prepare a canal for all the teeth. Obturation was carried out and post space was created using a Peeso reamer. All teeth were randomly divided into three groups of 20 samples in each group: Group I, teeth inserted with prefabricated carbon posts; Group II, teeth inserted with prefabricated zirconia posts; and Group III, teeth inserted with prefabricated everStick posts. Core buildup was performed using light-cured composite resin. Compressive load required to fracture the tooth was measured using a universal testing machine.
The compressive strength of zirconia posts was highest with a mean of 796.10 ± 20.78 followed by carbon posts (628.22 ± 18.11) and lower compressive strength was exhibited by everStick posts (534.13 ± 19.98). An analysis of variance revealed a statistically highly significant difference ( < 0.005) among the different posts used, and a statistically significant difference between carbon posts vs. zirconia posts, carbon posts vs. everStick posts, and zirconia posts vs. everStick posts ( < 0.05).
Zirconia posts show the maximum fracture resistance than the carbon posts and everStick posts.
本研究旨在评估不同桩系统在根管治疗后的牙齿中的抗折强度。
本研究选取60颗新鲜拔除的单根第一前磨牙。对所有牙齿采用传统逐步后退技术制备根管。进行根管充填，并用Peeso扩孔钻制备桩道。所有牙齿随机分为三组，每组20个样本：第一组，插入预制碳纤维桩的牙齿；第二组，插入预制氧化锆桩的牙齿；第三组，插入预制everStick桩的牙齿。采用光固化复合树脂进行核修复。使用万能试验机测量牙齿折断所需的压缩载荷。
氧化锆桩的抗压强度最高，平均值为796.10±20.78，其次是碳纤维桩（628.22±18.11），everStick桩的抗压强度较低（534.13±19.98）。方差分析显示，所使用的不同桩之间存在统计学上的高度显著差异（<0.005），并且碳纤维桩与氧化锆桩之间、碳纤维桩与everStick桩之间以及氧化锆桩与everStick桩之间存在统计学上的显著差异（<0.05）。
氧化锆桩比碳纤维桩和everStick桩表现出最大的抗折性。
