Mechanical Properties of Mini-Implants Used in Extra-Radicular Anchorage
Pesqui. bras. odontopediatria clín. integr
;
23: e210155, 2023. tab, graf
Artigo
em Inglês
| LILACS, BBO
| ID: biblio-1507020
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 andMethods:
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.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Aço Inoxidável
/
Resistência à Tração
/
Titânio
/
Procedimentos de Ancoragem Ortodôntica
Tipo de estudo:
Estudos de avaliação
Limite:
Animais
Idioma:
Inglês
Revista:
Pesqui. bras. odontopediatria clín. integr
Assunto da revista:
Odontologia
Ano de publicação:
2023
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Federal University of Rio de Janeiro/BR
/
Pontifical Catholic University of Minas Gerais/BR
/
Southwest Bahia State University/BR
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