Velusamy Pavethynath, Shimada Yasushi, Kanno Zuisei, Ono Takashi, Tagami Junji
Department of Orthodontic Science, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.
Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.
Dent Mater J. 2019 Feb 8;38(1):22-27. doi: 10.4012/dmj.2017-262. Epub 2018 Aug 29.
The aim of this study was to evaluate in vitro detection of enamel white spot lesions around orthodontic brackets using swept-source optical coherence tomography (SS-OCT). Twenty-four clear orthodontic brackets were bonded onto the enamel surface of bovine incisor specimens using three types of orthodontic resin adhesives: non-fluoridated, fluoridated, and fluoridated light cured. The specimens were subjected to artificial demineralization. SS-OCT images were captured before demineralization and at 24 h and 1 week after demineralization. Lesion depth (LD) was measured and analyzed using Image J software. Results revealed significant increases in LD with time in all three groups. LDs were, however, significantly smaller in the fluoridated adhesive groups than in the non-fluoridated group. In addition, SS-OCT was validated for the detection of micro-leakage and white spot lesions beneath and around the orthodontic brackets.
本研究的目的是使用扫频光学相干断层扫描（SS-OCT）评估正畸托槽周围釉质白斑病变的体外检测。使用三种正畸树脂粘合剂将24个透明正畸托槽粘结到牛切牙标本的釉质表面：非氟化、氟化和氟化光固化。对标本进行人工脱矿。在脱矿前、脱矿后24小时和1周采集SS-OCT图像。使用Image J软件测量和分析病变深度（LD）。结果显示，所有三组的LD均随时间显著增加。然而，氟化粘合剂组的LD明显小于非氟化组。此外，SS-OCT在检测正畸托槽下方和周围的微渗漏和白斑病变方面得到了验证。
