Morfis A S
Department of Conservative Dentistry Endodontics, University of Athens, School of Health Sciences, Faculty of Dentistry.
Oral Surg Oral Med Oral Pathol. 1990 May;69(5):631-5. doi: 10.1016/0030-4220(90)90248-q.
In this study, I review, clinically and radiographically, 303 patients with 460 single or multirooted endodontically treated teeth. In all teeth, the therapy was performed by me with the use of final restoration of the crown with or without post and full cast crown coverage after treatment. The teeth were functioning for at least 3 years, without having received any other type of dental work since then. I evaluated the existence of vertical root fracture, the function of the teeth, the type of root canal therapy, the type and length of the post, and the type of retention of the post used in all 460 teeth. After statistical evaluation of the results, I found that 3.69% of the teeth had had vertical root fracture. Computer analysis, simple correlation hypothesis, and distribution method with 1 degree of freedom revealed significant correlation between vertical root fracture and the technique of instrumentation and obturation of the canal (p = 0.025), the length of the post (p = 0.05), and the existence of the post (p = 0.05). On the contrary, I found no correlation between root fracture and type of retention of the prefabricated post used with respect to the method of obturation.
在本研究中，我对303例患者的460颗经牙髓治疗的单根或多根牙齿进行了临床和影像学检查。所有牙齿的治疗均由我进行，治疗后使用或不使用桩及全冠修复对牙冠进行最终修复。这些牙齿至少行使功能3年，此后未接受任何其他类型的牙科治疗。我评估了所有460颗牙齿的垂直根折情况、牙齿功能、根管治疗类型、桩的类型和长度以及所使用桩的固位类型。对结果进行统计评估后，我发现3.69%的牙齿发生了垂直根折。计算机分析、简单相关假设以及自由度为1的分布方法显示，垂直根折与根管预备和充填技术（p = 0.025）、桩的长度（p = 0.05）以及桩的存在（p = 0.05）之间存在显著相关性。相反，我发现根折与就充填方法而言所使用的预制桩的固位类型之间没有相关性。
