Retrospective evaluation of prosthetic complications and peri-implant boneresorption in implant-supported single unit fixed restorations

Aim: The aim of this study was to retrospectively investigate the prosthetic complications and peri-implant bone loss by clinical and radiological examination at the 12th month of implantsupported single-unit fixed restorations. Materials and Methods: In this retrospective study, 100 volunteer patients, aged between 20 and 64, who received implant-supported single-member fixed restoration treatment, were scanned from the archives and included. The patients were scanned from the archives, called for 12-month follow-ups, and clinical and radiographic evaluations were made. G*Power (G*Power Ver. 3.0.10, Franz Faul, Üniversität Kiel, Germany) package program was used to calculate the sample size. Digital radiographs (periapical-panoramic films) taken from the patients at the end of the implant treatment and at the 12th month follow-up were recorded using Planmeca Romexis® software. ImageJ, a digital image analysis program, was used to evaluate marginal bone loss on radiographs (ImageJ 1.54g- Wayne Rasband and Contributons, National institutes of Health, USA). In evaluating the success and survival of the implants, the criteria in the consensus decisions published at the International Oral Implantology Congress in 2007 were taken as basis. In addition, prosthetic complications such as chipping, screw loosening and decementation; Its relationship with anatomical localization, implant length, implant diameter, abutment type, superstructure material, occlusal table and the condition of the opposing arch was evaluated. Results: The number of people with screw loosening problems at present or in the last 12 months was 15 (15.0%), and the number of people with decementation problems was 13 (13.0%). However, the number of people experiencing metal-porcelain chipping problems was found to be 4 (4.0%). Screw loosening was significantly higher in multi-unit abutments than in other abutment types. The survival rate of the implants evaluated in our study was 100%, and only 2 implants had problematic survival. Conclusion: The use of implants shorter than 10 mm and implant placement at the tissue level increases bone loss. In addition, screw loosening is more common in screw-retained abutments. Key Words: Dental Implant, Implant Supported Fixed Prosthesis, Prosthetic Complication, Bone Loss.