Retrospective clinical study of 842 clasp-retained removable partial dentures with a metal framework: survival, maintenance needs, and biologic findings.

IF 1.3 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Quintessence international Pub Date : 2024-10-24 DOI:10.3290/j.qi.b5566187
Silvia Brandt, Anna Winter, Hans-Christoph Lauer, Georgios Romanos
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Abstract

Objectives: To evaluate clasp-retained removable partial dentures (C-RPDs) with a metal framework for survival, maintenance requirements, and biologic implications.

Method and materials: C-RPDs were retrospectively analyzed based on patient records. Treatment failure was defined as fracture of a framework component (metal base or connector) or loss of an abutment tooth. Other outcome variables included factors that might conceivably impact C-RPD survival (maxilla vs mandible, Kennedy classes, opposing dentitions, treatment by students vs certified dental practitioners), mobility and caries of abutment teeth (in relation to clasp designs), and maintenance requirements (relining, clasp or resin fractures). Differences were evaluated by appropriate statistical tests at the P ≤ .05 level.

Results: A total of 612 patients (339 men, 273 women) 60.0 ± 11.5 years old at delivery were included, covering 842 C-RPDs and a mean observation period of 42.1 ± 33.2 months. Kaplan-Meier C-RPD survival was 76.2% after 5 years and 49.5% after 10 years. Biologic complications (ie, loss of abutment teeth) accounted for the vast majority (95.6%) of C-RPD failures, and Kaplan-Meier C-RPD survival was significantly better in the mandible (P = .015). Some clasp designs contributed significantly to caries and removal of abutment teeth (both P .05). No other significant differences were noted.

Conclusion: Tooth loss both emerges as the main cause of C-RPD failure and might be amenable to careful selection of clasp designs. Overall, better C-RPD survival should be expected in the mandible. A noncontributory role of Kennedy classes and opposing dentitions is tentatively suggested based on numerically heterogenous subgroups.

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842 枚金属框架扣式可摘局部义齿的回顾性临床研究:存活率、维护需求和生物学发现。
目的评估带有金属框架的带扣可摘局部义齿(C-RPD)的存活率、维护要求和生物学影响:根据患者记录对 C-RPD 进行回顾性分析。治疗失败的定义是框架部件(金属基托或连接体)断裂或基牙脱落。其他结果变量包括可能影响C-RPD存活率的因素(上颌与下颌、肯尼迪等级、对生牙、学生治疗与认证牙医治疗)、基牙的移动性和龋坏(与扣环设计有关)以及维护要求(重新衬垫、扣环或树脂断裂)。差异通过适当的统计检验进行评估,P ≤ .05 为差异水平:共纳入 612 名患者(男性 339 人,女性 273 人),分娩时年龄为 60.0 ± 11.5 岁,共进行了 842 次 C-RPD 治疗,平均观察时间为 42.1 ± 33.2 个月。卡普兰-米尔 C-RPD 5 年后存活率为 76.2%,10 年后存活率为 49.5%。生物并发症(即基牙脱落)占了C-RPD失败的绝大多数(95.6%),下颌骨的Kaplan-Meier C-RPD存活率明显更高(P = .015)。一些卡环设计明显导致基牙龋坏和脱落(P 均 < .05)。结论:结论:牙齿脱落是导致 C-RPD 失败的主要原因,仔细选择牙扣设计可能会有所帮助。总体而言,下颌骨的 C-RPD 成活率更高。根据数量上的异质性亚组,初步认为肯尼迪等级和对生牙的作用并不重要。
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来源期刊
Quintessence international
Quintessence international 医学-牙科与口腔外科
CiteScore
3.30
自引率
5.30%
发文量
11
审稿时长
1 months
期刊介绍: QI has a new contemporary design but continues its time-honored tradition of serving the needs of the general practitioner with clinically relevant articles that are scientifically based. Dr Eli Eliav and his editorial board are dedicated to practitioners worldwide through the presentation of high-level research, useful clinical procedures, and educational short case reports and clinical notes. Rigorous but timely manuscript review is the first order of business in their quest to publish a high-quality selection of articles in the multiple specialties and disciplines that encompass dentistry.
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