Biomechanics of internal connection in mandibular implant-supported prosthesis under effect of loadings and number of implants: A 3D finite element analysis

• Published in: Computers in biology and medicine 2022-09, Vol.148, p.105755-105755, Article 105755
• Main Authors: Dayrell, Andreza Costa, Pimenta de Araújo, Cíntia Tereza, Rocha, Ricardo Lopes, Isolan, Cristina Pereira, Noritomi, Pedro Yoshito, Mesquita, Marcelo Ferraz
• Format: Article
• Language: English
• Subjects: Biomechanics; Bone implants; Bone strain; Dental implants; Edentulous; Finite element analysis; Finite element method; Mandible; Mathematical models; Mechanical loading; Multiple prostheses; Numerical analysis; Prostheses; Prosthetics; Software; Stress; Stress distribution; Tapering; Titanium; Transplants & implants
• ISSN: 0010-4825; 1879-0534
• DOI: 10.1016/j.compbiomed.2022.105755

The success of bone-implant prostheses depends on several factors, among them an adequate distribution and passive adaptation of occlusal loading. this study evaluated the stress distribution in mandibular implant-supported prosthesis with internal connection morse taper interface, under effect of number of implants (4 or 5) and loadings (bilateral 100 N, bilateral 300 N). the virtual models were subjected to analysis by 3D finite element method, across four experimental conditions. The stress values were evenly distributed to the peri-implant bone and implants in all simulated conditions. Stress values did not increase in the same proportion as the increase in the applied load (from 100 to 300 N). The stress value was 1.1 times higher on the implants and nearly doubled (1.5–2 times) on the peri-implant bone. For mandibular implant-supported prosthesis, the morse taper interface is strongly recommended, with similar mechanical demand for four and five implants in both loading conditions. Five implants offered no additional benefit over four implants. The commercial pure titanium frameworks presented stress values close to the yield strength of the metal, especially at the intersection with the cantilever. [Display omitted] •The CM interface provides a homogeneous stress distribution in all implants and bones.•The CM interface showed higher stress absorption, although lower bone transference.•The bone stress values did not increase at the same rate as the load:1.5–2 times.•The implants' stress values did not increase at the same rate as the load:1.1 times.•The increase of 1 implant didn't a significant influence on the stress reduction.