Academic Centre for Dentistry Amsterdam (ACTA), Research Institute MOVE, University of Amsterdam, Department of Oral Implantology and Prostodontics, Amsterdam, The Netherlands.
Clin Implant Dent Relat Res. 2011 Dec;13(4):255-61. doi: 10.1111/j.1708-8208.2009.00210.x. Epub 2009 Aug 3.
The aim of this study was to present the clinical outcomes of the immediate loading of two bar-splinted implants retaining a mandibular overdenture.
In a clinical trial, 124 edentulous patients were treated according to a new treatment concept, which involves the immediate loading of two bar-splinted SLActive implants with an implant-retained mandibular overdenture. The new conventional mandibular denture is used as a template for implant positioning and as an impression tray, and for mounting the retention clip by the dental laboratory. At the same day the implants are placed, the conventional denture is converted into an implant-retained overdenture. During the healing and evaluation period, resonance frequency analysis (RFA) was undertaken to assess the effect of loading on implant stability and survival.
The survival rate of the implants was 98.8% during the evaluation period (12-40 months). Only 3 of the 248 implants were lost. During the healing (osseointegration) phase, the implant-stability quotient increased significantly (p = .0001). During the evaluation period, four patients (3%) needed a relining of their mandibular overdenture, whereas 13 patients (11%) needed relining of the maxillary denture.
Two interconnected implants can be successfully loaded by a mandibular overdenture at the same day of implant placement with a high survival rate of the implants. Only a few patients needed additional relining of the overdenture. Repeated RFA measurements can be useful in gauging implant stability and survival.
本研究旨在介绍即刻负载两根杆夹板式种植体固位下颌覆盖义齿的临床效果。
在一项临床试验中，124 名无牙颌患者按照一种新的治疗理念接受了治疗，该理念涉及即刻负载两根带有种植体固位下颌覆盖义齿的 SLActive 杆夹板式种植体。新的常规下颌义齿用作种植体定位和印模托盘的模板，并由牙科实验室安装固位夹。在放置种植体的同一天，将常规义齿转换为种植体固位覆盖义齿。在愈合和评估期间，采用共振频率分析（RFA）评估负载对种植体稳定性和存活率的影响。
在评估期（12-40 个月），种植体的存活率为 98.8%。248 个种植体中只有 3 个丢失。在愈合（骨整合）阶段，种植体稳定性商数显著增加（p=0.0001）。在评估期间，有 4 名患者（3%）需要重新衬垫下颌覆盖义齿，而有 13 名患者（11%）需要重新衬垫上颌义齿。
两根相互连接的种植体可以通过下颌覆盖义齿在种植体放置的同一天成功负载，种植体的存活率很高。只有少数患者需要额外衬垫覆盖义齿。重复 RFA 测量可用于评估种植体稳定性和存活率。
