1 / 22

Overview

Overview. Principles of QLF The Equipment The Results Clinical Uses Questions and Demonstration. Why a New Diagnostic Method?. Prevent cavitation Spotting trouble early early lesions (white spots) bacterial activity Follow trouble through time

lavinia-combs
Télécharger la présentation

Overview

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Overview • Principles of QLF • The Equipment • The Results • Clinical Uses • Questions and Demonstration

  2. Why a New Diagnostic Method? • Prevent cavitation • Spotting trouble early • early lesions (white spots) • bacterial activity • Follow trouble through time • Objective support for the prevention process • Enhance the quality of oral care • Improve the quality of restorations and sealants • Improve, encourage and focus the quality of oral hygiene

  3. Early Lesion Detection • Scattering properties of tooth tissue allow contrast enhancement E D White Spot

  4. Red Fluorescence Detection E D

  5. Pre-invasive Lesion Detection

  6. White Light QLF QLF Contrast Enhancement

  7. Examples of Bacterial Activity

  8. Lightguide Video camera QLF system box PC The System and The Software

  9. Dentistry: QLF-Scan, QLF-Pro

  10. Longitudinal Monitoring

  11. Caries Mapping

  12. White Spot Lesion Exposed After Brushing Area = 9.6 mm2 ΔR = From 51.8% to 30.5 % Before brushing Area = 30.6 mm2 ΔR = 51.8 % Red Fluorescence: Quantification clean RCutoff = 20%

  13. Defective sealant. Red fluorescence indicating caries at the edges of a restoration. Discolored fissure in a molar identified as ‘sensitive’. Note the red hue around the fissure. Sealant applied over unprepared carious tooth The restoration was replaced, yet secondary caries remains. When the fissure was opened, a dentinal lesion was found. Danger Zones: Bacterial Activity Sealants Restorations Hidden Caries

  14. Red fluorescence indicating bacterially affected caries at the edges of a restoration. Corresponding radiograph: red arrows mark the radio-translucency underneath the restoration. The restoration was replaced, yet secondary caries remains. Use During Restorative Procedures • Diagnose presence of secondary caries • Check removal of bacterially affected tooth substance All pictures courtesy of Dr. R. Heinrich-Weltzien and Dr. J. Künisch, Friedrich-Schiller University of Jena, Erfurt, Germany

  15. Area = 2.2 mm2 ΔR = 32.4 % Area = 3.2 mm2 ΔR = 47.5 % Area = 0.7 mm2 ΔR = 25.3 % Red Fluorescence: Caries Excavation RCutoff = 20% P. Sas 2003

  16. No RF Red Fluorescence: Sealants Sound Sealant Leaking Sealant R. Heinrich et al. 2001

  17. Conclusions • Agreement with visual inspection (Radike) • better sensitivity • very good specificity • Quick patient assessment • Amount of initial lesions detected with QLF-Vision indicates caries risk • Longitudinal monitoring of lesions • follow de- and remineralization in time • QLF-Vision is a reliable method for early lesion monitoring

  18. QLF™ makes the invisible visible

  19. Clinical Validation • 1994 Øgaard and ten Bosch: demonstration of lesion tracking by measuring scattering properties • 1995 de Josselin de Jong ea: Improvement of QLF system • 1997 Al-Khateeb ea: detection of remin with QLF in weekly intervals consistent with microradiography • 1998 Al-Khateen ea: QLF can be used to evaluate pre-invasive treatment • 1998 Connersville study (IU): • QLF appropriate for use on occlusal as well as buccal-lingual surfaces • QLF is practical for large-scale clinical studies • QLF detects 4-9 times as many lesions vs. visual inspection • QLF validity for caries detection supported (ten Cate ea, 1999)

  20. Clinical Validation • 2001 Traneus ea: QLF is a sensitive method for longitudinal monitoring of incipient lesions on smooth surfaces • Heinrich ea (to be published): QLF was able to separate groups of high-caries patients (33) that were given prophylaxis with or without the application of fluoride varnish, every 8 weeks for 6 months.

  21. Clinical Validation in Progress • At IUPUI (Dr. George Stookey): • 2-Year study to validate QLF for the detection of primary caries • 2-Year study to validate QLF for the detection of secondary caries • 18-Month study of QLF to monitor caries in orthodontic patients • 18-Month study of ability of QLF to detect differences in caries rates in patients provided toothpastes with different concentrations of fluoride • At Inspektor: • Correlation between red fluorescence and specific bacterial strains. • Clinical study on bracket related incipient caries

More Related