Influence of gripping with pliers on the surface rugosity of orthodontic wires

Vol. 16 – Number 61 – 2023 Original article Page 44-55 Influence of gripping with pliers on the surface rugosity of orthodontic wires Carlos Sebastian Arias¹ Carlos Nelson Elias² Victor Angelo Montalli³ Jurandir Barbosa³ Roberta Tarkany Basting³ Abstract Proposition: the surface roughness of orthodontic wires was evaluated in vitro before and after gripping with two different orthodontic pliers. Material And Methods: Units were made of 30 round heat-activated Nickel Titanium alloy wires 0,014” (Neosentalloy, GAC), and another group with 30 rectangular steel wires 0,019 x 0,025”. The surface roughness was evaluated with a rugosimeter (NewViewTM 7100, Zygo), before and after gripping with Weingart plier on the left side and Mathieu plier on the right side (Dentaurum), in addition to the average difference in roughness between groups of the same types of wires with parameters Ra (μm), Rq (μm), PV (μm), Srmax Iso (nm). The variation of parameters with different clamps was evaluated (Wilcoxon test); different alloys by the same clamp, 95% confidence level and p<0.05. Results: The round wires showed significant differences (Ra and Rq) before and after being gripped with Mathieu plier. The roughness was higher after being gripped. Weingart pliers and round wires obtained the same results, with greater roughness after being clamped. Rectangular wires showed significant differences in all parameters, with both clamps. The means of the differences in the parameters between the Weingart pliers and the Mathieu forceps on the round wires were not statistically significant. In the rectangular wire, the values between the tweezers showed greater roughness with the grip of the Weingart pliers, with significant differences.Conclusion: After securing the orthodontic wires, the Weingart pliers and the Mathieu tweezers increased the roughness parameters. Descriptors: Surface roughness, friction, orthodontic wires, weingart pliers, mathieu. ¹ Faculty of Dentistry – National University of Asunción – Asunción – Paraguay. ² Laboratory of Biomaterials – Military Institute of Engineering. ³ Faculty of Dentistry – SL Mandic. DOI: 10.24077/2023;1661-02631171