Overdentures in the Edentulous Mandible Supported by Implants and Retained by a Dolder Bar: A 5‐Year Prospective Study. (11th August 2011)

• Record Type: Journal Article
• Authors: Heschl, Alexander; Payer, Michael; Clar, Volker; Stopper, Marlene; Wegscheider, Walther; Lorenzoni, Martin
• Is Part Of: Clinical implant dentistry and related research. Volume 15:Number 4(2013:Aug.)
• Page Start: 589
• Page End: 599
• Publication Date: 2011-08-11
• Subjects: crestal bone measurement -- Dolder bar -- edentulous mandible -- overdenture; Dental implants -- Periodicals; Dental Implantation -- Periodicals; Dental Implants -- Periodicals; 617.693
• DOI: 10.1111/j.1708-8208.2011.00380.x
• Languages: English
• ISSNs: 1523-0899

Abstract

ABSTRACT: Purpose: This prospective study was performed to evaluate the outcomes of XiVE® S plus implants (Dentsply Friadent, Mannheim, Germany) following conventional restoration with bar structures and overdentures in the edentulous mandible. Materials and Methods: A total of 39 patients were treated with four interforaminal implants ( n = 156) splinted by a Dolder bar. Overdentures were attached to the bars after 3 months of healing. As primary outcome measures, clinical and radiological parameters were evaluated at the time of implant placement (baseline) and once a year (1, 2, 3, 4, 5 years) after functional loading. Secondary outcome measures included (i) primary stability and surgical complications, as well as (ii) Periotest® (Medizintechnik Gulden, Modautal, Germany) values, implant survival, and prosthetic complications at baseline and follow‐up. Results: A total of 156 implants were placed. The vast majority ( n = 149) were tightened to >30 Ncm, while torques in the range of 20–30 Ncm were obtained in the remaining cases ( n = 7). Mean crestal bone levels around the implants were 0.41 mm at baseline and 1.04/1.20/1.34/1.45/1.44 mm after 1/2/3/4/5 years respectively. The mean values of the plaque, calculus, bleeding, and mucosal indices remained low throughout this period. The reported follow‐up periods involved one implant loss after 3 months (survival rate: 99.4%) and one implant failure after 4 years (success rate: 98.4%). Prosthetic complications included factures of bars ( n = 3) and denture teeth ( n = 7). Prosthetic survival was 100%. Conclusions: Dolder bars to restore oral implants in the edentulous mandible appear to offer a high rate of implant survival, good stability of the peri‐implant tissue, and a low rate of prosthetic complications.