Title: The effects of implant design, bone quality, and insertion process on primary stability of dental implants: an in-vitro study
Authors: Mansour Rismanchian; Mojtaba Afshari
Addresses: Dental Implants Research Center, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran ' Dental Implants Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Mechanical Engineering, Faculty of Engineering, Islamic Azad University, Najaf Abad Branch, Najafabad, Isfahan, Iran
Abstract: The aim of this study was to analyse the maximum insertion torque (MIT) with respect to the implant thread face angle, bone quality and the insertion process. Two implants were designed and made: one with high face angle (HFA) and the other with low face angle (LFA). Bovine bones were classified, and then the MIT values of the implants were measured per round using standard protocol. Finally, three-way ANOVA was used to interpret the MIT values. For the main effects, MIT values (mean and standard error) of LFA (17.4 ± 0.7 N cm) and HFA implants (20.8 ± 0.7 N cm) were significantly different. The MIT values for the D4 (9.4 ± 0.6 N cm), D3 (19.1 ± 0.7 N cm), and D2 (28.8 ± 1.1 N cm) bones were significantly different. Considering the higher primary stability as an essential provision for immediate load implants, it is recommended to use implants featured with higher thread face angles.
Keywords: implant design; maximum insertion torque; MIT; primary stability; PS; in-vitro; bone quality; thread design; thread face angle; three-way ANOVA.
International Journal of Biomedical Engineering and Technology, 2020 Vol.34 No.4, pp.319 - 333
Received: 23 Aug 2017
Accepted: 30 Nov 2017
Published online: 05 Jan 2021 *