使用新型荧光辅助识别技术（FIT）对正畸托槽周围光滑表面树脂密封剂进行完整性测试。
Integrity testing of a smooth surface resin sealant around orthodontic brackets using a new Fluorescence-aided Identification Technique (FIT).
出版信息
Angle Orthod. 2018 Nov;88(6):765-770. doi: 10.2319/110217-748.1. Epub 2018 Jul 13.
OBJECTIVE
: To investigate the integrity of a fluorescing resin-based sealant placed around orthodontic brackets using the Fluorescence-aided Identification Technique (FIT).
MATERIALS AND METHODS
: Standard brackets were bonded to the buccal surfaces of 17 extracted sound permanent premolar crowns sealed with ProSeal. Specimens were thermocycled (20,000 cycles, 5-55°C), and toothbrushing was simulated using an electric toothbrush and artificial aqueous toothpaste slurry. Changes in the sealed area were measured after one, two, three, and four alternating thermocycling-brushing cycles simulating 2 years of wear. Digital images were captured applying FIT (405 nm) using a digital camera-equipped stereomicroscope. ImageJ was used to measure sealant integrity and loss.
RESULTS
: There was a time-dependent decrease in sealed areas by between 21% and 100% (mean 54%). The sealant lost its integrity immediately after the first cycle, and unfilled areas were observed in all samples.
CONCLUSIONS
: The analyzed sealant lost its integrity over time. Using the proposed FIT, sealed surfaces were easily verified and quantified.
目的
使用荧光辅助识别技术（FIT）研究正畸托槽周围荧光树脂密封剂的完整性。
材料与方法
将标准托槽黏结于 17 颗离体完整恒前磨牙的颊面，并用 ProSeal 进行密封。标本经过热循环（20,000 次，5-55°C），并使用电动牙刷和人工水性牙膏糊剂模拟刷牙。模拟两年磨损，经过一个、两个、三个和四个交替热循环-刷牙循环后，测量密封区域的变化。使用配备数字摄像头的立体显微镜应用 FIT（405nm）获取数字图像。使用 ImageJ 测量密封剂的完整性和损失。
结果
密封区域的面积随时间呈下降趋势，下降幅度在 21%至 100%之间（平均 54%）。密封剂在第一个循环后立即失去完整性，所有样本中都观察到未填充区域。
结论
分析的密封剂随时间推移失去完整性。使用提出的 FIT，可以轻松验证和量化密封表面。
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