Evaluation of 1‐Piece Versus 3‐Piece Framework Designs for the Edentulous Mandible with Fixed Implant‐Supported Prostheses: A Clinical, Occlusal and Biomechanical Study. Issue 4 (15th January 2021)

• Record Type: Journal Article
• Authors: Yu, Wenqian; Chen, Siyi; Li, Xiaoqian; Ma, Xiaoni; Xu, Xin
• Is Part Of: Journal of prosthodontics. Volume 30:Issue 4(2021)
• Page Start: 290
• Page End: 297
• Publication Date: 2021-01-15
• Subjects: T‐scan -- dental occlusion -- finite element analysis -- electromyography; Prosthodontics -- Periodicals; Dental implants -- Periodicals; Dentistry -- Periodicals; 617.69
• DOI: 10.1111/jopr.13320
• Languages: English
• ISSNs: 1059-941X

Abstract

Abstract: Purpose: This study aims to evaluate the clinical, occlusal and biomechanical performance of 1‐piece and 3‐piece designs for implant‐supported fixed dentures in the edentulous mandible. Materials and Methods: A total of 65 patients with edentulous mandibles who underwent fixed implant‐supported restorations were recruited and subsequently assigned to 1 of 2 groups based on the framework design (1‐piece or 3‐piece). The participants underwent clinical and occlusal examination using a periodontal probe, T‐Scan III system, and electromyography 12 months after prosthesis delivery. Two mandibular finite element models were created to evaluate stress values and their distribution during function. Results: Ninety‐five point four percent (n = 62) of participants in the follow‐up period underwent clinical and occlusal examination after prosthesis delivery. Clinical examination revealed a trend towards increased inflammation around the implants in the 1‐piece prostheses. Occlusal parameters indicated that the 1‐piece design was superior for the masticatory system than the 3‐piece design. Biomechanical analysis revealed the highest stress values in the posterior region of the 3‐piece design. Conclusions: On the basis of ease of ensuring oral hygiene, when compared to the 3‐piece design, the 1‐piece framework design might be the superior therapy for restoring an edentulous mandible, based on occlusal and biomechanical outcomes.