Department of Orthodontics and Dentofacial Orthopedics, AECS Maaruti College of Dental Sciences and Research Centre, Bangalore, India.
Angle Orthod. 2011 Nov;81(6):1028-35. doi: 10.2319/021111-101.1.
To assess the antiadherent and antibacterial properties of surface modified stainless steel orthodontic brackets with photocatalytic titanium oxide (TiO(2)) against Lactobacillus acidophilus.
This study was done on 120 specimens of stainless steel preadjusted edgewise appliance (PEA) orthodontic brackets. The specimens were divided into four test groups. Each group consisted of 30 specimens. Groups containing uncoated brackets acted as a control group for their respective experimental group containing coated brackets. Surface modification of brackets was carried out by the radiofrequency (RF) magnetron sputtering method with photocatalytic TiO(2). Brackets then were subjected to microbiological tests for assessment of the antiadherent and antibacterial properties of photocatalytic TiO(2) coating against L acidophilus.
Orthodontic brackets coated with photocatalytic TiO(2) showed an antiadherent effect against L acidophilus compared with uncoated brackets. The bacterial mass that was bound to the TiO(2)-coated brackets was less when compared with the uncoated brackets. Furthermore, TiO(2)-coated brackets had a bactericidal effect on L acidophilus, which causes dental caries.
Surface modification of orthodontic brackets with photocatalytic TiO(2) can be used to prevent the accumulation of dental plaque and the development of dental caries during orthodontic treatment.
评估经光催化氧化钛（TiO2）表面改性的不锈钢正畸托槽的抗黏附和抗菌性能，以抵抗嗜酸乳杆菌。
本研究共涉及 120 个不锈钢预调直丝弓正畸托槽标本。标本分为 4 个实验组，每组 30 个标本。不含涂层托槽的组作为各自含涂层托槽实验组的对照组。采用射频（RF）磁控溅射法对托槽进行表面改性，形成光催化 TiO2 涂层。然后对托槽进行微生物学测试，以评估光催化 TiO2 涂层对嗜酸乳杆菌的抗黏附和抗菌性能。
与未涂层托槽相比，经光催化 TiO2 涂层处理的正畸托槽对嗜酸乳杆菌具有抗黏附作用。与未涂层托槽相比，与 TiO2 涂层托槽结合的细菌量较少。此外，TiO2 涂层托槽对导致龋齿的嗜酸乳杆菌具有杀菌作用。
经光催化 TiO2 表面改性的正畸托槽可用于预防正畸治疗过程中牙菌斑的堆积和龋齿的发生。
