Department of Interdisciplinary Dentistry Pomeranian Medical University in Szczecin, Poland.
Biomed Res Int. 2021 Jan 28;2021:6611979. doi: 10.1155/2021/6611979. eCollection 2021.
Gummetal is a novel multifunctional alloy which possesses distinctive properties with the potential to refine and amend the efficacy of orthodontic treatment. The objective of this critical literature review was to investigate scientific evidence concerning the mechanical and clinical features of this recently manufactured beta-titanium orthodontic wire.
Electronic databases: PubMed, PMC, Google Scholar, Ovid, and Cochrane Library were searched. Studies investigating the properties of Gummetal orthodontic wire including in vitro and clinical studies were selected, validity was assessed, and data was extracted. The risk of bias was assessed by the Cochrane risk of bias Tool 2.0 in a randomized clinical trial. . Among 322 papers, 13 papers were selected and divided into two groups: prospective double-blinded randomized clinical trial and in vitro studies.
The results of this review should be interpreted with caution because of the heterogeneity of the studies. Only single clinical trial paper was found in the literature. The studies reported different characteristics obtained by various methods; thus, it was difficult to objectively compare the results. Low bending strength, low fatigue limit, and high resilience have been confirmed. Gummetal provides lower force than Nitinol and TMA but higher than Supercable wire. Plastic deformation of Gummetal questions its superelasticity. Friction of Gummetal wire is comparable to SS and CoCr wires. Because of its nontoxic chemical composition, Gummetal might be useful in the initial phase of orthodontic treatment for patients suffering from nickel allergy. Further studies are necessary to assess the usefulness of Gummetal in the clinical practice.
Gummetal 是一种新型多功能合金，具有独特的特性，有可能改善和修正正畸治疗的效果。本批判性文献综述的目的是研究有关这种最近制造的β钛正畸丝的机械和临床特性的科学证据。
电子数据库：PubMed、PMC、Google Scholar、Ovid 和 Cochrane Library 进行了搜索。选择了研究 Gummetal 正畸丝性能的研究，包括体外和临床研究，评估了有效性，并提取了数据。使用 Cochrane 偏倚风险工具 2.0 对随机临床试验进行了偏倚风险评估。在 322 篇论文中，选择了 13 篇论文，并将其分为两组：前瞻性双盲随机临床试验和体外研究。
由于研究的异质性，应该谨慎解释本综述的结果。文献中仅发现一篇单一的临床研究论文。研究报告了通过不同方法获得的不同特性，因此很难客观地比较结果。已证实低弯曲强度、低疲劳极限和高弹性。Gummetal 的力低于 Nitinol 和 TMA，但高于 Supercable 线。Gummetal 的塑性变形质疑其超弹性。Gummetal 线的摩擦与 SS 和 CoCr 线相当。由于其无毒的化学成分，Gummetal 可能对镍过敏的患者的正畸治疗初始阶段有用。需要进一步研究来评估 Gummetal 在临床实践中的有用性。
