Article

Laser fluorescence device does not perform well in detection of early caries lesions in primary teeth: an in vitro study.

Department of Pediatric Dentistry, School of Dentistry, Universidade de São Paulo, São Paulo, Brazil.
Oral health & preventive dentistry (impact factor: 0.55). 01/2008; 6(2):165-9. pp.165-9
Source: PubMed

ABSTRACT To evaluate if using the laser fluorescence (LF) device improves the detection of early or more advanced occlusal caries lesions in primary teeth.
A total of 181 occlusal sites in primary teeth were assessed by one examiner using DIAGNOdent. The same examiner and a second examiner evaluated 72 of the sites again to assess intra- and inter-examiner reproducibility. After histological validation, lesions were divided at three thresholds according to the lesion depth: outer half of the enamel (D1), inner half of the enamel (D2) and dentine (D3). The sensitivity, specificity, accuracy and area under ROC curve were calculated for cut-off points for the sample considering the aforementioned thresholds. The parameters were compared using chi-square test and by comparison between unpaired ROC curves.
The overall LF performance was better at dentine threshold than at enamel threshold. The higher specificity was found at D3 and D2, and higher accuracy at D3 (P < 0.001). The intra- and inter-examiner agreements were classified as good or excellent for all thresholds.
The LF device performs better at the dentine threshold than at the enamel threshold. This method does not perform well in detecting initial enamel caries lesions.

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Keywords

181 occlusal sites
 
aforementioned thresholds
 
chi-square test
 
dentine threshold
 
detecting initial enamel caries lesions
 
enamel threshold
 
higher accuracy
 
higher specificity
 
inter-examiner agreements
 
inter-examiner reproducibility
 
laser fluorescence
 
lesion depth
 
LF device
 
LF performance
 
occlusal caries lesions
 
primary teeth
 
ROC curve
 
second examiner
 
thresholds
 
unpaired ROC curves