Residency Training Program in Orthodontics, Department of Pedodontics and Preventive Dentistry, Faculty of Dentistry, Srinakharinwirot University.
Department of Mechanical Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi.
Dent Mater J. 2022 Oct 2;41(5):682-687. doi: 10.4012/dmj.2021-295. Epub 2022 May 27.
This study aims to compare the static friction of untreated and fine particle shot peening (FPSP) treated stainless steel and ceramic bracket slots. A total of 60 pieces of stainless steel and 60 pieces of ceramic brackets (Roth prescription, 0.022×0.028 in) were divided into 3 groups: control (n=20), silica glass bead particle surface treatment (n=20) and stainless steel (SUS316L) particle surface treatment (n=20). Ten brackets of each group were combined with 0.019×0.025 in orthodontic stainless steel arch wires and were analyzed for static friction. The remaining 10 brackets of each group were tested for slot surface roughness and hardness. The result shows that stainless steel brackets treated with FPSP exhibited lower static friction, with smoother and harder surfaces than the control group (p<0.05). In contrast, treated ceramic brackets showed no difference from the control group in terms of static friction, roughness, and hardness (p>0.05).
本研究旨在比较未经处理和微粉高速粒子喷丸处理（fine particle shot peening，FPSP）后的不锈钢和陶瓷托槽槽沟的静摩擦系数。共制备 60 个不锈钢和 60 个陶瓷托槽（Roth 规格，0.022×0.028 in），分为 3 组：对照组（n=20）、玻璃珠粒子表面处理组（n=20）和不锈钢（SUS316L）粒子表面处理组（n=20）。每组中的 10 个托槽与 0.019×0.025 in 的正畸不锈钢方丝结合，用于分析静摩擦。每组剩余的 10 个托槽用于测试槽沟表面粗糙度和硬度。结果表明，与对照组相比，经 FPSP 处理的不锈钢托槽表现出较低的静摩擦系数，表面更光滑、更硬（p<0.05）。相比之下，经处理的陶瓷托槽在静摩擦系数、粗糙度和硬度方面与对照组无差异（p>0.05）。
