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Mechanical Properties of Mini-Implants Used in Extra-Radicular Anchorage
Lopes, Gabriela Barros; Pithon, Matheus Melo; Mordente, Carolina Morsani; Nojima, Lincoln Issamu; Horta, Martinho Campolina Rebello; Oliveira, Dauro Douglas; Soares, Rodrigo Vilamarim.
Affiliation
  • Lopes, Gabriela Barros; Pontifical Catholic University of Minas Gerais. Belo Horizonte. BR
  • Pithon, Matheus Melo; Southwest Bahia State University. Jequié. BR
  • Mordente, Carolina Morsani; Pontifical Catholic University of Minas Gerais. Belo Horizonte. BR
  • Nojima, Lincoln Issamu; Federal University of Rio de Janeiro. Rio de Janeiro. BR
  • Horta, Martinho Campolina Rebello; Pontifical Catholic University of Minas Gerais. Belo Horizonte. BR
  • Oliveira, Dauro Douglas; Pontifical Catholic University of Minas Gerais. Belo Horizonte. BR
  • Soares, Rodrigo Vilamarim; Pontifical Catholic University of Minas Gerais. Belo Horizonte. BR
Pesqui. bras. odontopediatria clín. integr ; 23: e210155, 2023. tab, graf
Article in En | LILACS, BBO | ID: biblio-1507020
Responsible library: BR1264.1
ABSTRACT
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.
Subject(s)
Key words

Full text: 1 Collection: 01-internacional Database: BBO / LILACS Main subject: Stainless Steel / Tensile Strength / Titanium / Orthodontic Anchorage Procedures Type of study: Evaluation_studies Limits: Animals Language: En Journal: Pesqui. bras. odontopediatria clín. integr Journal subject: ODONTOLOGIA Year: 2023 Document type: Article Affiliation country: Brazil Country of publication: Brazil

Full text: 1 Collection: 01-internacional Database: BBO / LILACS Main subject: Stainless Steel / Tensile Strength / Titanium / Orthodontic Anchorage Procedures Type of study: Evaluation_studies Limits: Animals Language: En Journal: Pesqui. bras. odontopediatria clín. integr Journal subject: ODONTOLOGIA Year: 2023 Document type: Article Affiliation country: Brazil Country of publication: Brazil