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首页> 外文期刊>The Journal of Prosthetic Dentistry >Relationship between crown placement and the survival of endodontically treated teeth.
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Relationship between crown placement and the survival of endodontically treated teeth.

机译：牙冠位置与牙髓治疗牙齿存活之间的关系。

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Statement of Problem. Crowns have been considered the restoration of choice for endodontically treated teeth, but their selection has been based primarily on anecdotal evidence. Purpose. This study tested the hypothesis that crown placement (coronal coverage) is associated with improved survival of endodontically treated teeth when preaccess, endodontic, and restorative factors are controlled. Material and Methods. A University of Iowa College of Dentistry treatment database was used to identify permanent teeth that had undergone initial obturation between July 1, 1985, and December 31, 1987. Study patients were restricted to persons with at least 1 dental visit in each 2-year interval from 1985 to 1996; a simple random sample of 280 patients (n = 400 teeth) was selected. Dental charts, radiographs, and computerized databases were examined to ascertain variables of interest and to verify study inclusion criteria. Kaplan-Meier survival estimates were generated for the 203 teeth that satisfied study inclusion criteria. Multivariate Cox proportional hazards regression models were developed, with standard errors adjusted to account for clustering of teeth within patients. Results. When tooth type and radiographic evidence of caries at access were controlled, the final Cox model showed that endodontically treated teeth not crowned after obturation were lost at a 6.0 times greater rate than teeth crowned after obturation (95% confidence interval: 3.2 to 11.3). Conclusion. Within the limitations of this study, a strong association between crown placement and the survival of endodontically treated teeth was observed. These results may impact treatment planning if long-term tooth retention is the primary goal.
机译：问题陈述。牙冠被认为是牙髓治疗牙齿的修复选择，但是其选择主要基于轶事证据。目的。这项研究检验了以下假设：在控制预入牙，牙髓和修复因子后，牙冠位置（冠状覆盖）与经牙髓治疗的牙齿的存活率提高有关。材料与方法。使用爱荷华大学牙科学院的治疗数据库来识别在1985年7月1日至1987年12月31日期间初次阻塞的恒牙。研究对象仅限于每两年间隔至少进行一次牙齿访视的人1985年至1996年;选择了280位患者（n = 400颗牙齿）的简单随机样本。检查了牙科图表，射线照片和计算机数据库，以确定感兴趣的变量并验证研究纳入标准。满足研究纳入标准的203颗牙齿产生了Kaplan-Meier生存估计。开发了多变量Cox比例风险回归模型，并调整了标准误差以考虑患者牙齿的聚集。结果。当控制了牙齿的类型和进入时龋的影像学证据后，最终的Cox模型显示，经牙髓治疗的未闭塞牙的丢失率是闭塞后加冕牙的6.0倍（95％置信区间：3.2至11.3）。结论。在这项研究的局限性内，观察到牙冠位置和牙髓治疗牙齿的存活之间有很强的联系。如果长期保持牙齿是主要目标，那么这些结果可能会影响治疗计划。

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