Data collection about failures in fixed partial dentures: 1-year monitoring

ABSTRACT Objective: The aim of this study was to evaluate the satisfaction of patients rehabilitated with fixed partial denture and the incidence of failures/clinical complications of prostheses after one year. Methods: The patients answered a questionnaire about the satisfaction degree with dental treatment performed and care maintenance for prosthesis conservation. Clinical and radiographic evaluations of the prosthesis were performed. Data were tabulated for descriptive analysis of the factors assessed, with calculation of absolute frequencies and percentages, and chi-square and Fisher’s exact test.. Results: A total of 9.67% failures were found. The most common was the prosthesis loosening (57.14%), followed by ceramic fracture (28.57%), and abutment tooth fracture (14.29%). Biological failures were observed in 30.65%. The most common failure was gingival recession (52.00%), periodontal pocket (24.00%), support periodontal involvement (16.00%), and recurrent caries (4.00%). Radiographic examination showed that 70.97% of the total number evaluated had some kind of failure. There was statistically significant association between satisfaction degree and technical failure (p=0.04). Conclusion: Patients were satisfied after observation period of 1 year. The main failures detected were: crown cementation failure and ceramic fracture; gingival recession, periodontal pocket; manufacture and cementation of short intraradicular post with increased diameter and crown cervical misfit.摘要 目的：本研究旨在评估接受固定局部义齿（fixed partial denture）修复的患者的满意度，以及修复体在1年后的失败/临床并发症发生率。 方法：受试患者填写问卷，以评估其对所实施牙科治疗及义齿维护护理的满意程度；同时对修复体开展临床与影像学评估。将数据制表以对所评估的因素进行描述性分析，计算绝对频数与百分比，并采用卡方检验与Fisher确切概率法进行统计学检验。 结果：本研究共检出9.67%的修复体失败病例。其中最常见的为修复体松动（57.14%），其次为瓷裂（28.57%）与基牙（abutment tooth）折断（14.29%）。生物学失败占比30.65%，最常见的类型为牙龈退缩（52.00%）、牙周袋形成（24.00%）、支持牙周组织受累（16.00%）以及继发龋（4.00%）。影像学检查显示，70.97%的受评估修复体存在至少一种失败类型。患者满意度与技术失败之间存在统计学意义的关联（p=0.04）。 结论：在为期1年的观察期后，患者整体满意度良好。本次检测发现的主要失败类型包括：冠粘结失败、瓷裂；牙龈退缩、牙周袋形成；以及直径过大的短根管内桩的制作与粘结，以及冠颈缘密合不良。