A possible risk of CAD/CAM-produced composite resin premolar crowns on a removable partial denture abutment tooth: a 3-year retrospective cohort study
A possible risk of CAD/CAM-produced composite resin premolar crowns on a removable partial denture abutment tooth: a 3-year retrospective cohort study
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DOI：
10.1016/j.jpor.2018.08.005
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发表时间：
2019-01-01
影响因子：
3.6
通讯作者：
Egusa, Hiroshi
中科院分区：
文献类型：
--
作者：
Miura, Shoko;Kasahara, Shin;Egusa, Hiroshi
目的：评价计算机辅助设计/计算机辅助制造（CAD/CAM）生产的复合树脂冠（CAD/CAM复合冠）治疗前磨牙的早期表现，特别是在可摘局部义齿（RPD）基牙和牙弓中的远端牙上的放置，作为可能的临床危险因素。方法：回顾性队列研究（2014年4月至2017年7月），利用接受前磨牙CAD/CAM复合冠治疗的患者的临床记录。使用Kaplan-Meier分析估计(1)成功冠（无并发症事件）和(2)存活冠（临床功能包括重新修复）的治疗时间变量。采用log-rank检验分析“RPD基牙”和“远端牙”的生存分布。多水平生存分析用于确定危险比和相关危险因素。结果：327例患者共评估了547个冠（平均随访时间1.3±0.9年）。总共87个冠有至少一个并发症，冠固位丧失是最常见的（70个冠）。估计3年的成功率和生存率分别为71.7%和96.4%。RPD基牙发生并发症的风险明显高于非RPD基牙。近端牙弓与非近端牙弓的差异无统计学意义。结论：CAD/CAM复合冠在前磨牙上放置3年的并发症发生率为15.9%。在RPD基牙上放置这种冠有很大的并发症风险。(c) 2018年日本口腔修复学会。Elsevier Ltd.出版。版权所有。
Purpose: To evaluate the early performance of computer-aided design/computer-aided manufacturing (CAD/CAM)-produced composite resin crown (CAD/CAM composite crown) treatment on premolars, specifically, placement on a removable partial denture (RPD) abutment tooth, and the distalmost tooth in the dental arch, as possible clinical risk factors.Methods: A retrospective cohort study (April 2014 to July 2017) was performed utilizing the clinical records of patients who received a premolar CAD/CAM composite crown treatment. The variables of time of treatment for (1) successful crowns (complication event-free) and (2) surviving crowns (clinically functional including re-luted) were estimated using Kaplan-Meier analysis. Survival distributions regarding "RPD abutment tooth" and "distalmost tooth" were analyzed with the log-rank test. Multilevel survival analyses were used to identify hazard ratios and associated risk factors.Results: Five hundred and forty-seven crowns were evaluated (mean follow-up time 1.3 +/- 0.9 years) in 327 patients. A total of 87 crowns had at least one complication, with loss of crown retention being the most common (70 crowns). Estimated success and survival rates at 3 years were 71.7% and 96.4%, respectively. The risk of complications was significantly higher for an RPD abutment tooth than for a non-RPD abutment tooth. There was no significant difference between the distalmost tooth and non-distalmost tooth in the dental arch.Conclusions: The demonstrated complication rate for CAD/CAM composite crowns placed on premolars was 15.9% over a period of up to 3 years. There was a substantial risk of complications with placement of such a crown on an RPD abutment tooth. (c) 2018 Japan Prosthodontic Society. Published by Elsevier Ltd. All rights reserved.