Cacciafesta Vittorio, Sfondrini Maria Francesca, Ricciardi Andrea, Scribante Andrea, Klersy Catherine, Auricchio Ferdinando
Department of Orthodontics, University of Pavia, Italy.
Am J Orthod Dentofacial Orthop. 2003 Oct;124(4):395-402. doi: 10.1016/s0889-5406(03)00504-3.
This study measured and compared the level of frictional resistance generated between stainless steel self-ligating brackets (Damon SL II, SDS Ormco, Glendora, Calif), polycarbonate self-ligating brackets (Oyster, Gestenco International, Göthenburg, Sweden), and conventional stainless steel brackets (Victory Series, 3M Unitek, Monrovia, Calif), and 3 different orthodontic wire alloys: stainless steel (Stainless Steel, SDS Ormco), nickel-titanium (Ni-Ti, SDS Ormco), and beta-titanium (TMA, SDS Ormco). All brackets had a.022-in slot, whereas the orthodontic wire alloys were tested in 3 different sections:.016,.017 x.025, and.019 x 0.025 in. Each of the 27 bracket and archwire combinations was tested 10 times, and each test was performed with a new bracket-wire sample. Both static and kinetic friction were measured on a custom-designed apparatus. All data were statistically analyzed (Kruskal-Wallis and Mann Whitney U tests). Stainless steel self-ligating brackets generated significantly lower static and kinetic frictional forces than both conventional stainless steel and polycarbonate self-ligating brackets, which showed no significant differences between them. Beta-titanium archwires had higher frictional resistances than stainless steel and nickel-titanium archwires. No significant differences were found between stainless steel and nickel-titanium archwires. All brackets showed higher static and kinetic frictional forces as the wire size increased.
本研究测量并比较了不锈钢自锁托槽（Damon SL II，SDS Ormco，加利福尼亚州格伦多拉）、聚碳酸酯自锁托槽（Oyster，Gestenco International，瑞典哥德堡）和传统不锈钢托槽（Victory Series，3M Unitek，加利福尼亚州蒙罗维亚）之间产生的摩擦阻力水平，以及3种不同的正畸弓丝合金：不锈钢（Stainless Steel，SDS Ormco）、镍钛合金（Ni-Ti，SDS Ormco）和β钛合金（TMA，SDS Ormco）。所有托槽的槽沟宽度均为0.022英寸，而正畸弓丝合金在3种不同规格下进行测试：0.016英寸、0.017×0.025英寸和0.019×0.025英寸。27种托槽与弓丝组合中的每一种都进行了10次测试，每次测试都使用新的托槽-弓丝样本。在定制设计的仪器上测量了静摩擦力和动摩擦力。所有数据均进行了统计分析（Kruskal-Wallis检验和Mann Whitney U检验）。不锈钢自锁托槽产生的静摩擦力和动摩擦力明显低于传统不锈钢托槽和聚碳酸酯自锁托槽，而后两者之间没有显著差异。β钛合金弓丝的摩擦阻力高于不锈钢弓丝和镍钛合金弓丝。不锈钢弓丝和镍钛合金弓丝之间未发现显著差异。随着弓丝尺寸增加，所有托槽的静摩擦力和动摩擦力均增大。
