Machado Alana Cristina, Phillips Thaís Santiago, Zimmerman Richard, Scaramucci Taís, Amaechi Bennett Tochukwu
Department of Restorative Dentistry, University of São Paulo, School of Dentistry, São Paulo, São Paulo, Brazil.
Department of Comprehensive Dentistry, University of Texas Health San Antonio, San Antonio, Texas, USA.
Am J Dent. 2022 Feb;35(1):49-54.
To evaluate in vitro the potential of an intraoral scanner (IOS) to monitor erosive tooth wear (ETW) using different alignment software with distinct quantitative measurement metrics.
15 unpolished bovine crowns were exposed to citric acid (pH ~2.5) at 24-hour intervals up to 168 hours. At baseline and after each acid exposure episode, the teeth were scanned with IOS (3Shape TRIOS 3). Scanned images from each data point were superimposed on baseline image using WearCompare software to obtain volume loss (mm³) and area loss (mm²) and using IOS built-in software (3Shape TRIOS Patient Monitoring) to obtain depth loss (mm). Pearson's test was used to determine the correlation between acid exposure time (h) and each outcome measure (α= 0.05).
As the acid exposure time increased, the lesion parameters (depth, volume, and area) increased. Friedman's test showed that relative to baseline volume loss became significant (P< 0.05) after 72 hours from median 11.48 mm³ (IQI 25% = 8.72 mm³), eroded area became significant (P< 0.05) from median 48.67 mm² (IQI 25% = 44.46 mm², P< 0.05) after 96 hours, and erosion depth became significant (P< 0.05) from median 0.69 mm (IQI 25% = 0.66 mm²) after 144 hours. A strong correlation was observed between depth (mm²) and time (r= 0.9993 P< 0.0001), volume (mm³) and time (r= 0.9968, P< 0.0001), and area (mm²) and time (r= 0.9475, P= 0.0003).
Currently, there is no quantitative method for clinical monitoring of erosive tooth wear. The present study demonstrated that the intraoral scanner is a potential clinical tool for detecting and quantitatively monitoring early and advanced erosive tooth wear.
在体外评估口腔内扫描仪（IOS）使用具有不同定量测量指标的不同对齐软件监测侵蚀性牙齿磨损（ETW）的潜力。
15个未抛光的牛牙冠每隔24小时暴露于柠檬酸（pH约2.5）中，直至168小时。在基线和每次酸暴露后，用IOS（3Shape TRIOS 3）对牙齿进行扫描。使用WearCompare软件将每个数据点的扫描图像叠加在基线图像上，以获得体积损失（mm³）和面积损失（mm²），并使用IOS内置软件（3Shape TRIOS患者监测）获得深度损失（mm）。使用Pearson检验确定酸暴露时间（小时）与每个结果测量之间的相关性（α = 0.05）。
随着酸暴露时间的增加，病变参数（深度、体积和面积）增加。Friedman检验表明，相对于基线，体积损失在72小时后从中位数11.48 mm³（四分位数间距25% = 8.72 mm³）开始变得显著（P < 0.05），侵蚀面积在96小时后从中位数48.67 mm²（四分位数间距25% = 44.46 mm²，P < 0.05）开始变得显著，侵蚀深度在144小时后从中位数0.69 mm（四分位数间距25% = 0.66 mm²）开始变得显著（P < 0.05）。观察到深度（mm²）与时间（r = 0.9993，P < 0.0001）、体积（mm³）与时间（r = 0.9968，P < 0.0001）以及面积（mm²）与时间（r = 0.9475，P = 0.0003）之间存在强相关性。
目前，尚无用于侵蚀性牙齿磨损临床监测的定量方法。本研究表明，口腔内扫描仪是检测和定量监测早期和晚期侵蚀性牙齿磨损的潜在临床工具。
