ABSTRACT
PURPOSE: To quantify the strain development of a new prefabricated implant-supported mandibular full-arch reconstruction. MATERIALS AND METHODS: Five resin models reflecting edentulous mandibles were each restored with three interforaminal implants and prefabricated frameworks with a novel compensation mechanism, cast frameworks, and computer-aided design/computer-assisted manufacturing (CAD/CAM)-fabricated frameworks. Strains were recorded during superstructure fixation. Statistical analyses (analysis of variance, t tests; α = .05) were based on level of misfit and distribution of misfit. RESULTS: Cast restorations showed significantly higher levels of misfit and a significantly more uneven distribution of misfit compared to prefabricated and CAD/CAM restorations (P < .05 for all comparisons). Prefabricated and CAD/CAM frameworks showed a similar low level and distribution of misfit (P = .24145 and P = .2837, respectively). CONCLUSION: The compensation mechanism of the prefabricated frameworks provides a level of fit comparable to CAD/CAM superstructures.
Subject(s)
Computer-Aided Design , Dental Prosthesis Design , Dental Prosthesis, Implant-Supported , Dental Stress Analysis , Mandibular Reconstruction/methods , Prosthesis Fitting , In Vitro TechniquesABSTRACT
PURPOSE: The purpose of this clinical investigation was to evaluate the treatment outcome with zygoma implants with regard to implant survival, patient satisfaction, and function of prosthesis replacement after 3 years. PATIENTS AND METHODS: The treatment outcome of 76 patients treated with 145 zygoma fixtures at 16 centers was evaluated with regard to implant survival. Status of peri-implant mucosa and amount of plaque were registered annually. Patients' and dentists' evaluations of the functional and esthetic outcome of the treatment were assessed at delivery of prosthesis and thereafter at each follow-up visit. RESULTS: Sixty of 76 patients were followed for 3 years after prosthetic delivery. Five of 145 placed zygoma implants failed during the course of the study resulting in an overall implant survival rate of 96.3%. At the 3-year follow-up, 75% of the implants sites were registered with normal peri-implant mucosa and 68% with no visible plaque. The patients were fully satisfied with the esthetic and functional outcome of the treatment in 86% and 71%, respectively, at the 3-year follow-up visit. All reported data from dentists scored from acceptable to excellent. CONCLUSION: The multicenter study showed a high predictability of the zygoma implant-supported rehabilitation.
Subject(s)
Alveolar Bone Loss/surgery , Dental Implantation, Endosseous/methods , Dental Prosthesis, Implant-Supported , Jaw, Edentulous/rehabilitation , Maxillary Diseases/surgery , Maxillofacial Prosthesis Implantation/methods , Adult , Aged , Alveolar Bone Loss/complications , Alveolar Bone Loss/pathology , Dental Implants , Denture, Complete , Female , Follow-Up Studies , Humans , Jaw, Edentulous/surgery , Male , Maxilla/pathology , Maxilla/surgery , Maxillary Diseases/complications , Maxillary Diseases/pathology , Maxillary Sinus/surgery , Middle Aged , Patient Satisfaction , Severity of Illness Index , Treatment Outcome , Zygoma/surgeryABSTRACT
PURPOSE: To evaluate treatment outcome with Zygoma fixtures (Nobel Biocare, Göteborg, Sweden) with regard to fixture survival, patient satisfaction, and function of prosthesis replacement. MATERIALS AND METHODS: The treatment outcome of 76 patients treated with 145 Zygoma fixtures at 16 centers was evaluated. Patient's and dentist's evaluations of the functional and aesthetic outcome of the treatment were assessed at delivery of prosthesis and at the 1-year follow-up visit. At the 1-year follow-up visit, the status of the peri-implant mucosa around the abutments and the amount of plaque were registered. RESULTS: Sixty-six of the 76 patients, with 124 Zygoma fixtures supporting the prosthetic restorations, were evaluated at the 1-year follow-up. The overall survival rate for the Zygoma fixtures was 97.9% after 1-year of follow-up. Eighty percent of the patients were fully satisfied with both aesthetic and functional outcome at the time of prosthetic insertion and at the 1-year follow-up. All reported data from the dentists, with the exception of one restoration with several abutment screw loosenings, scored from acceptable to excellent for the aesthetic and functional outcome of the treatment. The status of peri-implant mucosa was recorded as normal in approximately 60% of the sites. Plaque, when present, was more often detected on the palatal surfaces compared with the buccal surfaces. CONCLUSION: This 1-year follow-up of Zygoma fixtures has shown good results with an acceptable number of minor complications and a majority of satisfied patients.
