Adeyemi A A, Jarad F D, Pender N, Higham S M
The University of Liverpool, Department of Clinical Dental Sciences, Edwards Building, Daulby Street, Liverpool L69 3GN, UK.
J Dent. 2006 Aug;34(7):460-6. doi: 10.1016/j.jdent.2005.10.006. Epub 2005 Dec 6.
This study compares the use of QLF with digital imaging in the detection and quantification of the development and removal of stain on teeth.
Two experimental phases, tooth staining and tooth whitening, conducted in vitro on labial 12 mm(2) enamel windows made on ten extracted bovine teeth, developed stains in 6-min cycles (2 min in each solution) using artificial saliva, chlorhexidine and tea solutions and removed them using sodium perborate monohydrate in 2-min cycle monitored at the end of each cycle with QLF (Inspektor Research Systems, NL) and digital photography (Fuji, Japan). The stain values were quantified as DeltaQ derived from QLF and DeltaE from digital imaging. This was observed by the two methods correlated with Pearson correlation coefficient (r). Regression equations (R(2)) were also obtained.
For both staining and stain removal there was a statistically significant (p<0.01) reverse correlation between DeltaQ values for QLF (r=-0.924, R(2)=85.4%) and DeltaE values for digital imaging (r=-0.994, R(2)=98.8%), respectively.
QLF showed a high correlation with digital imaging as a technique for detecting and monitoring tooth stains and tooth whitening in vitro. The potential for QLF with further development as a tool for monitoring staining and whitening of teeth may be possible in vivo in addition to the diagnostic ability for caries detection.
本研究比较了定量光导荧光法（QLF）与数字成像技术在检测和量化牙齿上污渍形成及清除情况的应用。
在十颗拔除的牛牙上制备唇面12平方毫米的釉质窗口，进行体外实验的两个阶段，即牙齿染色和牙齿美白。使用人工唾液、洗必泰溶液和茶溶液以6分钟周期（每种溶液中2分钟）形成污渍，并用单水过硼酸钠以2分钟周期清除污渍，在每个周期结束时用QLF（荷兰Inspektor Research Systems公司）和数字摄影（日本富士公司）进行监测。污渍值通过QLF得出的ΔQ和数字成像得出的ΔE进行量化。通过Pearson相关系数（r）观察两种方法之间的相关性，并获得回归方程（R²）。
对于染色和污渍清除，QLF的ΔQ值（r = -0.924，R² = 85.4%）与数字成像的ΔE值（r = -0.994，R² = 98.8%）之间分别存在统计学显著的负相关（p < 0.01）。
作为一种体外检测和监测牙齿污渍及牙齿美白的技术，QLF与数字成像显示出高度相关性。除了具有龋齿检测诊断能力外，随着进一步发展，QLF作为一种监测牙齿染色和美白工具在体内应用也具有潜力。
