Gabriela Barros Lopes, M. Pithon, C. Mordente, L. Nojima, M. Horta, D. Oliveira, Rodrigo Vilamarim Soares
{"title":"Mechanical Properties of Mini-Implants Used in Extra-Radicular Anchorage","authors":"Gabriela Barros Lopes, M. Pithon, C. Mordente, L. Nojima, M. Horta, D. Oliveira, Rodrigo Vilamarim Soares","doi":"10.1590/pboci.2023.044","DOIUrl":null,"url":null,"abstract":"Objective: To evaluate the mechanical properties of mini-implants (MIs) manufactured from stainless steel and compare them with conventional titanium-aluminum-vanadium alloy MIs. Material and Methods: The following groups were formed: G1 (n=24), 8 × 1.5 mm steel MIs; G2 (n=24), 12 × 2.0 mm steel MIs; and G3 (n=24), 10 × 1.5 mm titanium MIs. The 72 MIs were inserted in the infra zygomatic crest region of the maxilla and retromolar trigone in the jaw of 10 pigs. Pull-out, insertion torque, fracture and percussion tests were performed in order to measure the tensile strength, primary stability and fracture strength of MIs. A digital torque gauge was used to measure insertion and fracture torque, a universal mechanical testing machine was used for pull-out testing and a periotest device was used to measure the micromovement of MIs. For morphological and MI component evaluation, scanning electron microscopy (SEM) was performed. D'Agostino & Pearson, Kruskal-Wallis, and Dunn post-hoc and normality tests were used. Results: G2 insertion and fracture torques were significantly higher than G1 and G3 insertion and fracture torques (p<0.05). The pull-out and percussion tests presented similar values among the groups. SEM revealed that the fracture point was predominantly on the fourth thread for steel MIs (G1 and G2) and on the seventh thread for titanium-aluminum-vanadium MIs (G3). Conclusion: The mechanical properties of stainless steel MIs are superior to those of titanium-aluminum-vanadium alloy MIs.","PeriodicalId":45592,"journal":{"name":"Pesquisa Brasileira em Odontopediatria e Clinica Integrada","volume":null,"pages":null},"PeriodicalIF":0.4000,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Pesquisa Brasileira em Odontopediatria e Clinica Integrada","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1590/pboci.2023.044","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
引用次数: 0
Abstract
Objective: To evaluate the mechanical properties of mini-implants (MIs) manufactured from stainless steel and compare them with conventional titanium-aluminum-vanadium alloy MIs. Material and Methods: The following groups were formed: G1 (n=24), 8 × 1.5 mm steel MIs; G2 (n=24), 12 × 2.0 mm steel MIs; and G3 (n=24), 10 × 1.5 mm titanium MIs. The 72 MIs were inserted in the infra zygomatic crest region of the maxilla and retromolar trigone in the jaw of 10 pigs. Pull-out, insertion torque, fracture and percussion tests were performed in order to measure the tensile strength, primary stability and fracture strength of MIs. A digital torque gauge was used to measure insertion and fracture torque, a universal mechanical testing machine was used for pull-out testing and a periotest device was used to measure the micromovement of MIs. For morphological and MI component evaluation, scanning electron microscopy (SEM) was performed. D'Agostino & Pearson, Kruskal-Wallis, and Dunn post-hoc and normality tests were used. Results: G2 insertion and fracture torques were significantly higher than G1 and G3 insertion and fracture torques (p<0.05). The pull-out and percussion tests presented similar values among the groups. SEM revealed that the fracture point was predominantly on the fourth thread for steel MIs (G1 and G2) and on the seventh thread for titanium-aluminum-vanadium MIs (G3). Conclusion: The mechanical properties of stainless steel MIs are superior to those of titanium-aluminum-vanadium alloy MIs.
期刊介绍:
The PESQUISA BRASILEIRA EM ODONTOPEDIATRIA E CLINICA INTEGRADA operates under a continuous publication online modality. This model results in annual volumes, without issue numbers. The main goal of the PESQUISA BRASILEIRA EM ODONTOPEDIATRIA E CLINICA INTEGRADA is to publish results from Original Research as well as Systematic Reviews in the fields of Dentistry and related sciences areas. Its abbreviated title is Pesqui. Bras. Odontopediatria Clin. Integr., and it should be used in bibliographies, footnotes, references and bibliographic strips. PESQUISA BRASILEIRA EM ODONTOPEDIATRIA E CLINICA INTEGRADA encourages submissions from all authors throughout the world. Manuscripts are judged by two experts solely on the basis of their contribution of original data and ideas and their presentation. All manuscripts must comply with Instruction to Authors. The following articles will be considered for publication: Editorials, Original Articles, Systematic Reviews, Short communications and Letters to the Editor.