Analysis of stress/strain distribution in dental mini-implants manufactured by additive manufacturing and machining.

Autor: de Oliveira TT; Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo (FORP-USP), Ribeirão Preto, Brazil., Valente MLDC; Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo (FORP-USP), Ribeirão Preto, Brazil., Simões IG; Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo (FORP-USP), Ribeirão Preto, Brazil., Batalha RL; Welding and Quality Institute (ISQ), Research, Development and Innovation, Lisbon, Portugal., Macedo AP; Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo (FORP-USP), Ribeirão Preto, Brazil., Bolfarini C; Department of Materials Engineering, Center for Exact Sciences and Technology, Federal University of São Carlos (UFSCAR), São Carlos, Brazil., Pauly S; Institute for Complex Materials, IFW Leibniz Institute for Solid State and Materials Research, Dresden, Germany., Dos Reis AC; Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo (FORP-USP), Ribeirão Preto, Brazil.
Jazyk: angličtina
Zdroj: Journal of biomedical materials research. Part B, Applied biomaterials [J Biomed Mater Res B Appl Biomater] 2023 Oct; Vol. 111 (10), pp. 1751-1762. Date of Electronic Publication: 2023 May 22.
DOI: 10.1002/jbm.b.35282
Abstrakt: The study aimed to analyze the stress/strain distribution of new designs of mini-implants manufactured by machining and additive manufacturing. Four designs were evaluated (Ø2.0 mm × 10 mm): Intra-lock, helical, threaded machined (MN threaded) and threaded by additive manufacturing (AM threaded). Analysis of stress was performed through photoelastic analysis (100 N axial/oblique loads) and analysis of strain by digital image correlation (DIC) (250 N axial/100 N oblique load). Data distribution was verified using the Shapiro-Wilk test and a significance level of 5% was adopted. Quantitative data were analyzed using the non-parametric Kruskal-Wallis test. In photoelastic analysis, the Intra-lock mini-implant showed the highest stresses in the cervical (104 kPa), middle (108 kPa), and apical (212 kPa) thirds. Higher stresses were observed in the oblique loading situation for all designs. For DIC analysis, axial loading, a significant difference was observed for the AM Threaded mini-implants about the other designs in the cervical third (p = .04), with the highest strain value 47 με [10; 76]. In oblique loading, a significant difference between the mini-implants was observed in the middle and apical thirds, with higher strains for the AM threaded design -185 με [-173; 162] (p = .009) and 242 με [87; 372] (p = .013), respectively. In general, the influence of different mini-implant designs and the additive manufacturing method on the stress/strain was observed, in the photoelastic and DIC analysis. The evaluated designs demonstrated a lower concentration of stress/strain in the cervical region compared to the apical region, and higher stress/strain in situations of oblique load compared with axial load.
(© 2023 Wiley Periodicals LLC.)
Databáze: MEDLINE
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