Document Detail

The validity and repeatability of three light-induced fluorescence systems: An in vitro study.
MedLine Citation:
PMID:  10207198     Owner:  NLM     Status:  MEDLINE    
New optical systems are being developed that aim to determine the extent of demineralization in enamel. In our laboratory we have compared three such systems: a ring illuminator equipped with a laser, a beam splitter also equipped with a laser and an intra-oral camera equipped with a white-light arc lamp. The aim of the study was to compare the ability of the different optical systems to detect small enamel lesions with microradiographic analysis and to determine the repeatability of these systems. Forty human enamel specimens (3mm in diameter) were mounted in acrylic and polished. The specimens were kept moist throughout the study. Each specimen of the four groups was individually exposed to 14 ml of Carbopol demineralizing solution for 24, 48, 72 and 96 h, respectively. The mineral loss of the 40 specimens was assessed with blue-violet light- induced fluorescence. Each image was captured with a video camera and analysed with dedicated software. The measurements were repeated 3 times with complete shut-down of the system in between the measurements. The same measurements were performed with the ring illuminator, the beam splitter and the arc lamp. The specimens were then cut into thin sections and analysed with microradiography. Similar high correlations between microradiography and the light-based analysis systems were found for the beam splitter and the clinical caries camera set-up. The repeatability was best for the beam splitter set-up. This indicates that the light-induced fluorescence measurement technique can be used in different configurations and that the repeatability of the measurements is influenced by the physical stability of the set-up.
M Lagerweij; M van der Veen; M Ando; L Lukantsova; G Stookey
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Caries research     Volume:  33     ISSN:  0008-6568     ISO Abbreviation:  Caries Res.     Publication Date:    1999 May-Jun
Date Detail:
Created Date:  1999-07-13     Completed Date:  1999-07-13     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0103374     Medline TA:  Caries Res     Country:  SWITZERLAND    
Other Details:
Languages:  eng     Pagination:  220-6     Citation Subset:  D; IM    
Oral Health Research Institute, Indiana University School of Dentistry, Indianapolis, Ind., USA.
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MeSH Terms
Dental Caries / diagnosis*
Dental Enamel / pathology
Image Processing, Computer-Assisted
Lasers / diagnostic use
Light / diagnostic use*
Optics and Photonics
Photography / instrumentation
Reproducibility of Results
Transillumination / instrumentation,  methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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