Journal
JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY
Volume 30, Issue 4, Pages 290-297Publisher
WILEY
DOI: 10.1111/jopr.13320
Keywords
T-scan; dental occlusion; finite element analysis; electromyography
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Funding
- Youth Scientific Research Funds of School of Stomatology, Shandong University [2018QNJJ01]
- Shandong Medical and Health Science and Technology Development Plan [2017WS112]
- Construction Engineering Special Fund of Taishan Scholars [ts201511106]
- National Key Research and Development Program of China [2016YFC1102705]
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This study found that in implant-supported fixed dentures for the edentulous mandible, 1-piece design showed better performance than 3-piece design in terms of oral hygiene, occlusal parameters, and biomechanical analysis.
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.
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