Treatment of edentulous mandible with metal‐resin fixed complete dentures: A 15‐ to 20‐year retrospective study

摘要

Abstract Objectives The purpose of this retrospective study was to report the implant and prosthetic complications of mandibular metal‐resin fixed complete dentures (MRFCDs) opposing a maxillary complete removable dental prosthesis (CRDP) in a 15‐ to 20‐year post‐placement follow‐up period. Material and methods Dental records of 24 edentulous patients treated by a mandibular MRFCD and a maxillary CRDP were reviewed. Complications for the implants, MRFCDs, and CRDPs were recorded in four different recall periods: 0–5?years, 5–10?years, 10–15?years, and more than 15?years. The survival and failure times based on Kaplan–Meier statistics were analyzed using Lifetest procedures. Product‐limit survival estimates were used for cumulative survival rates (CSRs). Results The mean service time was 18.5?years. The CSR for the implants and MRFCDs was 91.8% at 16.9?years (confidence intervals: 85.2% and 95.5%) and 80% at 19.6?years (confidence intervals: 44.1% and 94.1%), respectively. The implant failures after 15?years occurred because of a tumor resection. Acrylic resin tooth fracture (45.8% of patients) and wear (75% of patients) were the most common complications with the MRFCD. Retaining screw complications [loosening (8.1% of retaining screws) and fracture (11.3% of retaining screws)] were also common. Conclusions The outcomes seen with MRFCD over the long term were favorable. After placement of prostheses, 1 implant loss was observed potentially due to prosthetic/hygiene/periodontal factors. However, potential maintenance complications such as acrylic resin tooth fracture and/or wear and retaining screw loosening and fracture may occur in the long term when a similar design is used for the mandible.