Reproducibility of electronic tooth colour measurements
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Anja Ratzmann
Abstract
Clinical methods of investigation, such as tooth colour determination, should be simple, quick and reproducible. The determination of tooth colours usually relies upon manual comparison of a patient's tooth colour with a colour ring. After some days, however, measurement results frequently lack unequivocal reproducibility. This study aimed to examine an electronic method for reliable colour measurement. The colours of the teeth 14 to 24 were determined by three different examiners in 10 subjects using the colour measuring device Shade Inspector™. In total, 12 measurements per tooth were taken. Two measurement time points were scheduled to be taken, namely at study onset (T1) and after 6 months (T2). At either time point, two measurement series per subject were taken by the different examiners at 2-week intervals. The inter-examiner and intra-examiner agreement of the measurement results was assessed. The concordance for lightness and colour intensity (saturation) was represented by the intra-class correlation coefficient. The categorical variable colour shade (hue) was assessed using the kappa statistic. The study results show that tooth colour can be measured independently of the examiner. Good agreement was found between the examiners.
©2008 by Walter de Gruyter Berlin New York
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Articles in the same Issue
- Guest editorial
- Biomechanics and biomaterials in oral rehabilitation and dental treatment
- Mini review
- Bone quality, quantity and metabolism in terms of dental implantation
- Research articles
- Finite element representation of bone substitute remodelling in the jaw bone
- The biomaterial influences the ossification after sinus floor elevation using tissue-engineered bone grafts
- O-phospho-l-serine: a modulator of bone healing in calcium-phosphate cements
- A new design for post and core restorations implementing positive locking
- Mechanical loading of orthodontic miniscrews – significance and problems: an experimental study
- Effect of load angulation and crown shape on forces acting on post and core restored teeth: an in vitro study
- Failure analysis of a new post-and-core restoration system using the finite element method
- The influence of the root cross-section on the stress distribution in teeth restored with a positive-locking post and core design: a finite element study
- Reproducibility of electronic tooth colour measurements
