While this study is on the clinical development of temporomandibular joint disorders and understanding various biomechanical approaches through finite element analysis as a panacea, the primary aim is to perform a literature review. Usage of biomedical prosthesis, over the years, including the initial development and later modernization with image processing and computer simulations, are briefly discussed from 1800 to 2021. Both manual database data-handling and AI (artificial intelligence) algorithms are used to select 503 journal papers, of which 116 were further studied in this review. This review explains the complete biomechanical structure of the TMJ, as disclosed possible reasons for the disorders and shortcomings in the medical treatments. In the later sections, the paper discussed the boundary conditions and the results of various studies from 2000 to 2021. It also discussed 36 papers with TMJR devices- providing important information on the stress-strain distributions in the implant and the mandible-fossa component. Both custom and stock devices are discussed with a FEM approach, with a proper evaluation of multiple software for individual studies. Finally, TMJR devices are considered helpful for treating TMJ disorders. The FEM approach should be considered precise and valuable biomechanical simulation tool for modifying and improving next-generation prosthetic devices.
Objective: To perform quantitative biomechanical analysis, probing the effect of varying thread shapes in an implant for improved primary stability in prosthodontics surgery.
Methods: Dental implants with square (SQR), buttress (BUT) and triangular (TRI) thread shapes or their combinations. Cone-beam computed tomography images of mandible molar zones in human subjects belonging to three age groups were used for virtual implantation of designed implants, to quantify patient-specific peri-implant bone micro-strain, using finite element analyses. The in silico analyses were carried out considering frictional contact to simulate immediate loading with a static masticatory force of 200 N. In order to validate computational biomechanics results, compression tests were performed on 3D printed implants having investigated thread architectures. Bone/implant contact areas were also quantitatively assessed.
Results: Bone/implant contact was maximum for SQR implants followed by BUT and TRI implants. For all the cases, peak micro-strain was recorded in the cervical cortical bone. The combination of different thread shapes in the middle or apical part (or both) was demonstrated to improve peri-implant micro-strain particularly for BUT and TRI.
Conclusions: Considering 1500-2000 micro-strain generates in peri-implant bone during regular physiological functioning, BUT-SQR, BUT-TRI-SQR, TRI-SQR-BUT, SQR, SQR-BUT-TRI design concepts were suitable for younger; BUT-TRI-SQR, BUT-SQR-TRI, TRI-SQR-BUT, SQR-BUT, SQR-TRI for middle-aged, and BUT-TRI-SQR, BUT-SQR-TRI, TRI-BUT-SQR, SQR, SQR-TRI for older group of human patients.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.