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Probing the Influence of Hybrid Thread Design on Biomechanical Response of Dental Implants: Finite Element Study and Experimental Validation

Chakraborty, A and Sahare, KD and Datta, P and Majumder, S and Roychowdhury, A and Basu, B (2023) Probing the Influence of Hybrid Thread Design on Biomechanical Response of Dental Implants: Finite Element Study and Experimental Validation. In: Journal of Biomechanical Engineering, 145 (1).

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Official URL: https://doi.org/10.1115/1.4054984


This study aimed to perform quantitative biomechanical analysis for probing the effect of varying thread shapes in an implant for improved primary stability in prosthodontics surgery. Dental implants were designed 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 the designed implants, to quantify patient-specific peri-implant bone microstrain, 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. To validate computational biomechanics results, compression tests were performed on three-dimensional printed implants having the investigated thread architectures. Bone/implant contact areas were also quantitatively assessed. It was observed that, bone/implant contact was maximum for SQR implants followed by BUT and TRI implants. For all the cases, peak microstrain was recorded in the cervical cortical bone. The combination of different thread shapes in the middle or in the apical part (or both) was demonstrated to improve peri-implant microstrain, particularly for BUT and TRI. Considering 1500-2000 microstrain generates in the peri-implant bone during regular physiological functioning, BUT-SQR, BUT-TRI-SQR, TRI-SQR-BUT, SQR, and SQRBUT-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, BUTSQR-TRI, TRI-BUT-SQR, SQR, and SQR-TRI for the older group of human patients. Copyright VC 2023 by ASME.

Item Type: Journal Article
Publication: Journal of Biomechanical Engineering
Publisher: American Society of Mechanical Engineers (ASME)
Additional Information: The copyright for this article belongs to American Society of Mechanical Engineers
Keywords: 3D printers; Biomechanics; Compression testing; Computerized tomography; Virtual reality, Biomechanical response; Bone implant; Bone/implant contact; Dental implant design; Finite element analyse; Implant design; Initial stabilities; Micro-strain; Peri-implant bones; Thread design, Finite element method
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 25 Jan 2023 05:45
Last Modified: 25 Jan 2023 05:45
URI: https://eprints.iisc.ac.in/id/eprint/79483

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