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- Title
Influence of Implant Inclination and Prosthetic Abutment Type on the Biomechanics of Implant-Supported Fixed Partial Dentures.
- Authors
Poletto-Neto, Victório; Tretto, Pedro Henrique Wentz; Zen, Bruno Massucato; Bacchi, Ataís; dos Santos, Mateus Bertolini Fernandes
- Abstract
Obtaining parallelism during implant placement is often difficult, leading to inclination of implants. The present study evaluated the stress distribution in 3-unit fixed partial dentures supported by 2 implants with different inclinations and prosthetic abutments. Universal castable long abutments (UCLAs) or tapered abutments were used considering 17° of implant angulation in different directions (mesial, distal, buccal, or lingual). To do so, 3-dimensional finite element models were built and exported to specific analysis software. Forces were applied to the functional cusps. Data were obtained with regard to the maximum principal and von Mises stresses (in MPa). No relevant differences were observed in the stress values in the cortical and cancellous bone nor in the prosthesis with UCLA or tapered abutments. However, a relevant stress reduction in the prosthetic screws of the tilted implant was observed when using UCLA abutments. According to the obtained results, it is possible to suggest that both UCLA or tapered abutments can be used for 3-unit fixed partial dentures when 1 of the implants is tilted. UCLA abutment might lead to less biomechanical problems related to screw loosening or fracture.
- Subjects
BRIDGES (Dentistry); CANCELLOUS bone; BIOMECHANICS; COMPACT bone; STRESS concentration
- Publication
Journal of Oral Implantology, 2019, Vol 45, Issue 5, p343
- ISSN
0160-6972
- Publication type
Article
- DOI
10.1563/aaid-joi-D-18-00305