Abstract：
BACKGROUND: The aim of this case report was to discuss the clinical application using a quantitative light-induced fluorescent (QLF) device for the diagnosis and treatment of a cracked tooth as visualizing the tooth\'s crack.
METHODS: A 39-year-old woman visited a dental hospital complaining of throbbing pain on tooth #36. Observation of the tooth with naked eyes showed that tooth had a ceramic restoration with no specific findings. QLF device\'s images around the restoration, and after removal of the restoration were taken. In the QLF image after removal of the restoration, clear red-fluorescent crack line was shown, indicating that microorganism had penetrated along the crack path. During root canal treatment, the QLF image of the inside of the pulp chamber showed a pattern in which the crack line progressed into the tooth. During the treatment of the cracked tooth, the crack line was removed as much as possible using the fluorescent information obtained by the QLF device, and crack lines of fluorescence images quantitatively analyzed using a QLF\'s software.
CONCLUSIONS: Images acquired with the QLF device can provide useful information for detecting crack lines, recording the treatment process, and restorative management of cracked teeth.
METHODS: A 39-year-old woman visited a dental hospital complaining of throbbing pain on tooth #36. Observation of the tooth with naked eyes showed that tooth had a ceramic restoration with no specific findings. QLF device\'s images around the restoration, and after removal of the restoration were taken. In the QLF image after removal of the restoration, clear red-fluorescent crack line was shown, indicating that microorganism had penetrated along the crack path. During root canal treatment, the QLF image of the inside of the pulp chamber showed a pattern in which the crack line progressed into the tooth. During the treatment of the cracked tooth, the crack line was removed as much as possible using the fluorescent information obtained by the QLF device, and crack lines of fluorescence images quantitatively analyzed using a QLF\'s software.
CONCLUSIONS: Images acquired with the QLF device can provide useful information for detecting crack lines, recording the treatment process, and restorative management of cracked teeth.
摘要：
背景：本病例报告的目的是讨论使用定量光诱导荧光（QLF）设备诊断和治疗有裂纹的牙齿的临床应用，以可视化牙齿的裂纹。
方法：一名39岁的妇女去了一家牙科医院，抱怨36号牙齿上有阵痛。用肉眼观察牙齿表明，牙齿具有陶瓷修复体，没有具体发现。恢复周围的QLF设备图像，并在拆除后进行修复。在QLF图象去除后恢复，显示了清晰的红色荧光裂纹线，表明微生物沿裂纹路径渗透。在根管治疗期间，牙髓腔内部的QLF图像显示出裂纹线进入牙齿的图案。在治疗牙齿破裂的过程中，使用QLF设备获得的荧光信息尽可能多地去除裂纹线，使用QLF软件对荧光图像的裂纹线进行定量分析。
结论：使用QLF设备获取的图像可以为检测裂纹线提供有用的信息，记录治疗过程，和牙齿破裂的修复管理。
方法：一名39岁的妇女去了一家牙科医院，抱怨36号牙齿上有阵痛。用肉眼观察牙齿表明，牙齿具有陶瓷修复体，没有具体发现。恢复周围的QLF设备图像，并在拆除后进行修复。在QLF图象去除后恢复，显示了清晰的红色荧光裂纹线，表明微生物沿裂纹路径渗透。在根管治疗期间，牙髓腔内部的QLF图像显示出裂纹线进入牙齿的图案。在治疗牙齿破裂的过程中，使用QLF设备获得的荧光信息尽可能多地去除裂纹线，使用QLF软件对荧光图像的裂纹线进行定量分析。
结论：使用QLF设备获取的图像可以为检测裂纹线提供有用的信息，记录治疗过程，和牙齿破裂的修复管理。
