Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Influence of the screw raw material and surface topography on mechanical behavior of Morse Taper Dental implant systems
Submission Author:
Rafaela Lopes da Silva , PR , Brazil
Co-Authors:
Rafaela Lopes da Silva, Giuseppe Pintaude
Presenter: Rafaela Lopes da Silva
doi://10.26678/ABCM.COBEM2023.COB2023-2251
Abstract
Contextualization: Dental implant manufacturers are seeking constant technological advances in the development of implantable medical devices. From a design perspective, the proper raw material selection and surface topography for each of the constituent parts of the dental implant system are as relevant as their geometry. So, it is relevant to evaluate the performance of new combinations of raw materials and surface topographies as candidates for those products. Purpose: This study aimed to evaluate the influence of screw raw materials and surface topographies on the mechanical behavior of a commercial Morse Taper implant system. Materials and methods: Four non-commercial combinations of raw materials and surface topographies (G1 - annealed, milled, and pink anodized Ti6Al4V-ELI titanium, G2 - annealed, milled and blue anodized Ti6Al4V-ELI titanium; G3 - annealed and milled Ti6Al7Nb titanium and G4 - extra hard and milled 316LVM stainless steel) were chosen as candidates to be used in the fabrication of prosthetic screws of a commercial Morse Taper implant system (Removal Prosthetic Screw Helix GM Implant manufactured by Neodent®). Mechanical compression and fatigue tests were performed following ISO 14801 recommendations. Statistics analyses were made using Minitab. Results: Compressive Tests: The 316LVM stainless steel screws from the G4 group reached the highest average compressive load at 420.8 N ± 6.2 N, statistically significant by Anova one way (α=0.01) in relation to the other groups tested. It was only possible to differentiate the means of the maximum compressive load between the other groups (G1, G2, and G3), resorting to the aid of Student's t-statistical analysis. Fatigue Tests: The maximum load value in high cycle fatigue, 200 N at 5M cycles, was also reached for G4, being 17.64% higher than the other groups tested in fatigue tests, which only reached 170 N at 5 M cycles. Conclusions: 316LVM stainless steel screw allowed the dental implant system to withstand higher loads in static and dynamic tests when compared to the other groups. It is suggested to carry out further studies using 316LVM stainless steel prosthetic screws in different implant systems to confirm the trend observed in this study, and once confirmed, evaluate the risk of galvanic corrosion between screws, prosthetic abutment, and implant.
Keywords
Mechanical tests, Dental Implant, Morse Taper, 316LVM Stainless Steel, Titanium alloys
