Professor, Department of Prosthodontics, Faculty of Dentistry, Fluminense Federal University (UFF), Nova Friburgo, Brazil.
Researcher, Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
J Prosthet Dent. 2024 Apr;131(4):603-610. doi: 10.1016/j.prosdent.2022.03.003. Epub 2022 Apr 14.
The minimum number of implants to support fixed complete dentures is still unclear.
The purpose of this retrospective clinical study was to evaluate the survival rate of fixed complete dentures supported by 3 immediately loaded implants opposing maxillary complete dentures.
A retrospective study of edentulous patients rehabilitated with complete dentures opposing mandibular metal-resin implant-supported fixed complete dentures supported by 3 immediately loaded implants was conducted in a 48-hour protocol. Fifty-one machined and 99 rough-surface implants were evaluated from 2.2 up to 8 years. Implant loss, peri-implant outcomes, and mechanical complications were assessed by considering the influence of age, sex, health status, smoking, excessive alcohol consumption, educational level, and socioeconomic status. The presence of comorbidities in relation to the implant surface or the cantilever lengths was also evaluated.
Four machined and 6 rough-surface implants failed, a 6.7% failure rate. The cantilever length varied from 3.3 to 22.9 mm. Mechanical complications were abutment screw loosening (3.0%), prosthetic screw loosening (17%), screw fracture (1%), superstructure detachment and fractures (16%), metal framework fracture (2%), maxillary denture fractures (6%), and mandibular prosthesis loss (4%). Peri-implant mucositis was found in 27% of participants. The cumulative implant and mandibular prosthesis survival rates were 93.3% and 96%, respectively. None of the variables evaluated, including demographic data and health status, were found to influence clinical failures and/or mechanical complications.
Mandibular fixed complete dentures supported by 3 implants can be considered a successful treatment with reduced costs compared with those of other fixed options for application in public health.
支持固定全口义齿的最小种植体数量仍不清楚。
本回顾性临床研究的目的是评估 3 个即刻负载种植体支持上颌全口义齿的固定全口义齿的存活率。
按照 48 小时方案，对用下颌金属树脂种植体支持的固定全口义齿修复的无牙颌患者进行回顾性研究。评估了 51 个加工表面种植体和 99 个粗糙表面种植体，随访时间为 2.2 至 8 年。考虑到年龄、性别、健康状况、吸烟、酗酒、教育水平和社会经济地位的影响，评估了种植体的丢失、种植体周围的结果和机械并发症。还评估了种植体表面或悬臂长度与共病之间的关系。
4 个加工表面种植体和 6 个粗糙表面种植体失败，失败率为 6.7%。悬臂长度从 3.3 到 22.9 毫米不等。机械并发症包括基台螺丝松动（3.0%）、修复体螺丝松动（17%）、螺丝断裂（1%）、上部结构脱落和断裂（16%）、金属框架断裂（2%）、上颌义齿断裂（6%）和下颌义齿丢失（4%）。27%的患者出现种植体周围黏膜炎。种植体和下颌义齿的累积存活率分别为 93.3%和 96%。评估的变量，包括人口统计学数据和健康状况，均未发现与临床失败和/或机械并发症有关。
与其他固定选择相比，用 3 个种植体支持的下颌固定全口义齿可被认为是一种成功的治疗方法，可降低成本，适用于公共卫生。
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