BACKGROUND: Existing indices to quantify tooth discolouration are mostly aetiology-specific. An index of tooth appearance (IOTA), derived from all types of tooth discolouration and surface defects, would allow the quantification of attractiveness for psychological assessment and treatment planning OBJECTIVE: To develop a perception based IOTA for quantification of all forms of tooth discolouration and surface defects. METHODS: One hundred images of discoloured teeth were twice ranked by a panel of judges according to perceived attractiveness. Mean image score was then used to arrange the images into a continuum of attractiveness and from these, ten images were selected, to constitute the illustrated IOTA. A second panel of judges assessed 35 clinical pictures using the IOTA, on two occasions. RESULTS: The first 100 images were assessed with a correlation of 0.79-0.81 between the two ranking sessions and with intra-group reproducibility of 0.8-0.94. The second panel of judges used the developed IOTA quickly, with an intra-judge correlation of 0.87 and inter-judge reliability of 0.72 and 0.74 for two sessions. CONCLUSIONS: The IOTA could be used by clinicians as a tool for quantifying disfigurement in teeth, irrespective of aetiology or histology.
BACKGROUND: Existing indices to quantify tooth discolouration are mostly aetiology-specific. An index of tooth appearance (IOTA), derived from all types of tooth discolouration and surface defects, would allow the quantification of attractiveness for psychological assessment and treatment planning OBJECTIVE: To develop a perception based IOTA for quantification of all forms of tooth discolouration and surface defects. METHODS: One hundred images of discoloured teeth were twice ranked by a panel of judges according to perceived attractiveness. Mean image score was then used to arrange the images into a continuum of attractiveness and from these, ten images were selected, to constitute the illustrated IOTA. A second panel of judges assessed 35 clinical pictures using the IOTA, on two occasions. RESULTS: The first 100 images were assessed with a correlation of 0.79-0.81 between the two ranking sessions and with intra-group reproducibility of 0.8-0.94. The second panel of judges used the developed IOTA quickly, with an intra-judge correlation of 0.87 and inter-judge reliability of 0.72 and 0.74 for two sessions. CONCLUSIONS: The IOTA could be used by clinicians as a tool for quantifying disfigurement in teeth, irrespective of aetiology or histology.
Authors: Nelly Molina-Frechero; Martina Nevarez-Rascón; Alfredo Nevarez-Rascón; Rogelio González-González; María Esther Irigoyen-Camacho; Leonor Sánchez-Pérez; Sandra López-Verdin; Ronell Bologna-Molina Journal: Int J Environ Res Public Health Date: 2017-01-12 Impact factor: 3.390