Dynamic nature of abutment screw retightening: finite element study of the effect of retightening on the settling effect

The Journal of Prosthetic Dentistry
Haddad Arabi BulaqiFarideh Geramipanah

Abstract

A fundamental problem in fully understanding the dynamic nature of screw loosening is lack of recognition of the entire process of screw tightening and retightening. The purpose of this study was to explain the dynamic nature of abutment screw retightening by using finite element methods to investigate the effect of the coefficient of friction and retightening on the settling effect. Precise computer models were designed of a Straumann dental implant, a directly attached crown, an abutment screw, and the bone surrounding the implant. All threaded interfaces were designed with a spiral thread helix with a specific coefficient of static and kinetic friction, and the surfaces were characterized as fine, regular, and rough. Abaqus software was used for dynamic simulation, which involved applying rotational displacement to the abutment screw and torque controlling during the steps of tightening, relaxation, retightening, and second relaxation and at different coefficients of friction. The obtained torque and preload values were compared to the predicted values. When surfaces changed from fine to rough, the remaining torque and preload decreased, and the settling effect increased. Upon retightening, the remaining torque and preload i...Continue Reading

References

Oct 25, 2002·The Journal of Prosthetic Dentistry·George K TzenakisVirendra B Dhuru
Nov 3, 2004·Journal of Biomechanics·Dinçer Bozkaya, Sinan Müftü
Dec 18, 2008·Journal of Applied Oral Science : Revista FOB·Rafael Augusto StükerNilza Pereira da Costa
Apr 5, 2013·Clinical Implant Dentistry and Related Research·Julia-Gabriela WittnebenUrs Brägger
Jan 16, 2014·The Journal of Prosthetic Dentistry·Ana Paula FarinaMarcelo Ferraz Mesquita
Feb 18, 2014·The Journal of Prosthetic Dentistry·Daniela JörnLothar Borchers

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Citations

Nov 25, 2016·The Journal of Prosthetic Dentistry·Thalisson Saymo de Oliveira SilvaCarmem Dolores Vilarinho Soares de Moura
Nov 18, 2015·The Journal of Advanced Prosthodontics·Atais BacchiAloisio Oro Spazzin
Feb 18, 2020·Journal of Prosthodontic Research·Tsuyoshi KitagawaHiroshi Murakami
Aug 11, 2017·Implant Dentistry·Patricia Mitiko Asanuma HirayamaPedro Tortamano
Jun 25, 2020·International Journal of Implant Dentistry·Walid Al-ZordkMohamed Ghazy
Jul 29, 2020·International Journal of Implant Dentistry·Eman Mohammed Nasr AttiahTamer Mohamed Nasr Mostafa
Nov 27, 2020·International Journal of Environmental Research and Public Health·Ana Sofia VinhasMariano Herrero-Climent
Feb 4, 2021·Journal of Family Medicine and Primary Care·Ebrahim F Alsubaiy
Sep 3, 2021·Journal of Prosthodontic Research·Camila Berbel SelotoWirley Gonçalves Assunção

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