Nano-Crystalline Ceramic Coatings for the Reduction of Sliding Resistance of Orth

描述（由申请人提供）：在这个项目中，纳米晶体陶瓷将使用离子束辅助沉积（IBAD）将纳米晶体陶瓷应用于正畸弓丝表面，以减少滑动阻力。当托架沿着金属丝滑动到新的位置时，过度的滑动阻力会阻碍牙齿运动，导致难以预测的结果，并且需要增加力量，治疗时间，“椅子时间”和患者费用。纳米晶IBAD陶瓷将减少耦合中的摩擦，更重要的是，通过硬化弓丝，将消除托架和弓丝结合点处的缺口，并加剧典型的粘滑运动轮廓。纳米晶形态也产生了具有更高韧性的表面，以抵抗磨损。在这个项目中，Al2O3， TiO2和ZrO2涂层将被应用于圆形和矩形截面的CuNiTi和2Ti弓线上，并在滑动抗拉测试中与未涂层的导线进行比较。将确定适合不同处理阶段的最佳材料组合。使用坚韧的、粘附的低滑动阻力涂层将有效地将滑动阻力与拱丝的其他机械性能分离开来。机械和滑动特性的新组合将成为可能，这将为医生提供解决特定患者问题的新工具。

DESCRIPTION (provided by applicant): In this program, nano-crystalline ceramics will be applied to the surface of orthodontic archwires using ion beam assisted deposition (IBAD) to reduce sliding resistance. Excessive sliding resistance works against tooth motion as the bracket slides along the wire into a new position, resulting in less predictable outcomes, and requiring increased force, treatment time, "chair time", and patient costs. Nano-crystalline IBAD ceramics will reduce friction in the couple, and more importantly, through hardening the arch wire, will eliminate the notching which occurs at binding points between the bracket and the wire, and exacerbates the typical stick-slip motion profile. Nano-crystalline morphology also yields a surface with improved toughness for withstanding wear. In this program, Al2O3, TiO2, and ZrO2 coatings will be applied to round and rectangular cross-section CuNiTi and 2Ti archwires, and compared to uncoated wires in a sliding resistance tensile test. The best material combinations appropriate for various treatment phases will be determined. Application of tough, adherent low sliding resistance coatings will effectively decouple sliding resistance from other mechanical properties of the arch wire. New combinations of mechanical and sliding properties will be made possible which will provide the practitioner with new tools for solving specific patient problems. PUBLIC HEALTH RELEVANCE: In this program, nano-crystalline ceramics will be applied to the surface of orthodontic arch wires using ion beam assisted deposition to reduce sliding resistance. Excessive sliding resistance works against tooth motion as the bracket slides along the wire into a new position. These ceramic coatings will produce more predictable outcomes, requiring less force, shorter treatment time, and decreased patient costs.