Mechanical Properties of Mini-Implants Used in Extra-Radicular Anchorage

IF 0.4 Q4 DENTISTRY, ORAL SURGERY & MEDICINE
Gabriela Barros Lopes, M. Pithon, C. Mordente, L. Nojima, M. Horta, D. Oliveira, Rodrigo Vilamarim Soares
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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.
用于根外支抗的微型种植体的力学性能
目的:评价不锈钢微型种植体的力学性能,并与传统的钛铝钒合金微型种植体进行比较。材料与方法:分为G1组(n=24), 8 × 1.5 mm钢MIs;G2 (n=24), 12 × 2.0 mm钢MIs;G3 (n=24), 10 × 1.5 mm钛合金MIs。在10头猪的上颌骨颧嵴下区和下颌臼齿后三角区植入72枚MIs。通过拔出、插入扭矩、断裂和冲击试验,测量了MIs的抗拉强度、初级稳定性和断裂强度。采用数字扭矩计测量插入和断裂扭矩,采用万能机械试验机进行拔出测试,采用测周仪测量MIs的微运动。形态学和MI成分评估,扫描电子显微镜(SEM)进行。采用D'Agostino & Pearson、Kruskal-Wallis和Dunn事后检验和正态性检验。结果:G2插入和骨折扭矩显著高于G1和G3插入和骨折扭矩(p<0.05)。拉出试验和冲击试验在各组间显示出相似的值。扫描电镜显示,断裂点主要在钢的第4螺纹(G1和G2)和钛铝钒的第7螺纹(G3)上。结论:不锈钢MIs的力学性能优于钛铝钒合金MIs。
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来源期刊
CiteScore
1.40
自引率
0.00%
发文量
39
审稿时长
24 weeks
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.
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