Technique of Framework Cemented on Prepared Abutments to Obtain Passive Fit at Fixed Complete Denture: A 2-Year Follow-Up Report

The passive fit of implant-supported dentures is fundamental to the rehabilitation success due the absence of the periodontal ligament in osseointegrated implants. Many techniques to obtain passive fit have been reported in the literature, some inaccessible for the clinicians and dental laboratories. This case report presents a technique to fabricate fixed complete dentures aiming at obtain passive fit with reduced time and cost, but without demerit for the aesthetics, function and longevity. A 40-year-old woman was referred for treatment presenting some teeth in the maxilla and an edentulous mandible, reporting eating problems related to instability and little retention of the mandibular complete denture. Treatment based on the reverse planning was performed to guide the rehabilitation with a complete mandibular fixed complete denture and maxillary occlusal plane adjustment. The framework of the fixed complete denture was manufactured luting a cast metal bar above the prepared titanium cylinder abutments using resin cement. The aim of this technique was to obtain a fixed complete denture with passive fit presenting positive esthetic and functional outcomes after 2 years of follow-up.

种植支持式义齿（implant-supported dentures）的被动适配（passive fit）是修复成功的核心前提，这是由于骨整合种植体（osseointegrated implants）不存在牙周韧带（periodontal ligament）。目前文献中已报道多种可实现被动适配的技术，但其中部分技术难以被临床医师与牙科实验室开展应用。本病例报告介绍一种旨在实现被动适配的固定全口义齿（fixed complete dentures）制作技术，该技术可缩短制作时长、降低成本，且不会对美学效果、咀嚼功能与修复体使用寿命造成不利影响。一名40岁女性患者前来就诊，上颌尚存部分天然牙，下颌为无牙颌，主诉因下颌全口义齿固位不佳、松动移位而出现进食困难。治疗采用逆向规划（reverse planning）以指导下颌固定全口义齿修复，并对上颌咬合平面进行调整。该固定全口义齿的支架通过树脂水门汀（resin cement）将铸造金属杆粘接于预制备的钛圆柱基台（titanium cylinder abutments）之上完成制作。本技术旨在获得具备被动适配特性的固定全口义齿，经2年随访后，其美学与功能效果均表现优异。