Effect of different impactor designs on biomechanical behavior in the interface bone-implant:​ a comparative biomechanics study

Bachiri, Abdessamed; Djebbar, Noureddine; Boutabout, Benali; Serier, Boualem

Affiliations

¹Mechanical Physic Laboratory of Materials (LMPM), Department of Mechanical Engineering, University of Sidi Bel Abbes, BP 89, Ben M’hidi City, Sidi Bel Abbes 22000, Algeria

²Mechanical Physic Laboratory of Materials (LMPM), Department of Mechanical Engineering, University of Hassiba Benbouali, Hay Salem, N 19 National road, Chlef 02000, Algeria

Abstract and keywords

Background and Objective: The implant makes it possible to replace a missing tooth in a very esthetic way with a very comfortable result because the tooth is fixed and independent of its neighbors, like a natural tooth. Titanium alloy grade 5 or Ti-6AI-4V, has excellent properties mechanical and an interesting modulus of elasticity. It is known to be biocompatible and remains the material of choice for the medical sector: orthopedic, dental implants and maxillofacial surgery. The objective of this study was to analyze the influence on the biomechanical behavior of dental implants with a variable velocity at the implant/bone contact area and to compare the differences EQV stress between spherical and conical impactor.

Methods: We chose a dental implant located in the lower jaw, in the region of the second premolar. The assembly consists of six parts: Feldsphatic porcelain crown, cobalt-chrome alloy framework, titanium alloy implant abutment and the jaw is composed of cancellous bone and cortical bone. The width and height of cortical bone model were 15.8 mm and 23.5 mm, respectively. The thickness of its upper part was 2 mm. The implant and its components were modeled using SolidWorks 2016 software and then exported to Abaqus program 6.13 using the finite element method. The geometry of the solid implant is presented in form of cylinder screw of length 8 mm and diameter 4.8 mm. The sizes of the abutment are: length l = 7.2 mm, lower diameter d1= 2.6 mm and great diameter d2 = 3.6 mm.

Results: Maximum von Mises stress generated by spherical impactor are lower than those obtained by conical impactor. For big velocity of the impactor, the stresses may be critical since the mechanical properties of the implant material and the cortical and cancellous bone could not withstand stress magnitudes recorded in this analysis.

Conclusions: A conical projectile leads to an equivalent stress greater than that generated by a spherical projectile. Whatever the projectile shape, the stress intensity increases in the different components of the dental prosthesis with increasing the impact velocity.

Keywords: Dental prosthesis; Velocity; Finite element analysis; Impactor

Links

DOI: 10.1016/j.cmpb.2020.105723

PubMed: 32877819

WoS: 000594824200014

History

Received: 2020-07-13

Revised: 2020-08-20

Accepted: 2020-08-20

Online: 2020-08-25

Cited Works (1)

Year	Entry
1999	Bermond F, Kallieris D, Mattern R, Ramet M, Bouquet R, Caire Y, Voiglio E. Human face response at an angle to the fore-aft vertical plane impact. In: Proceedings of the 1999 International IRCOBI Conference on the Biomechanics of Impact. September 23-24, 1999; Sitges, Spain.121-132.