IADR Abstract Archives
Agreement in tooth color determination between visual assessment by different observers, and a spectrophotometer.
Objectives: The aim of this study was assess the agreement in tooth color determination between visual assessment by different observers with dissimilar training degrees, and a spectrophotometer.
Methods: 73 dental students, (87.76% women and 12.33 men) with a mean (SD) age of 26.05 (± 4.36) years, in the fourth year of their dental degree at the University of Buenos Aires agreed to participate through an informed consent. Exclusion criteria were: having received a bleaching treatment in the previous 6 months, presence of total or partial peripheral restoration, tetracycline, fluoride or hypoplasia pigmentations, fracture, lesions in the right upper central incisor (1.1) and its absence. A dental prophylaxis procedure was performed on the bucal surface of each 1.1 with a prophylaxis brush (TDV) mounted on low-speed rotary instruments Kavo 2068 CHC (Germany) micromotor and a Kavo LUX K201(Germany) contra-angle. Shade measurement was performed in each subject in the middle third of the 1.1 by three independent observers, with different levels of clinical training (O1, O2, O3) in the same dental dental unit (Sino S2316) and time slot, and without using the light from the dental unit. Each subject was examined separately, without spandex with the VITA Classical guide system according to the manufacturer's instructions. The visual method was first applied and then, under the same conditions, the VITA Easyshade V spectrophotometer (Zahnfabrikn Bad Säckingen, Germany) which was calibrated before each determination according to manufacturer instructions. Data was analyzed with Fleiss Kappa and Cohen Kappa
Results: The agreement between all the observers and Easy Shade was moderate Fleiss Kappa (CI95): 0.48 (0.32-0.53), and also moderate among the 3 observers Fleiss Kappa (CI95): 0.49 (0.41-0.57 ). Between pairs of observers and EasyShade: Cohen Kappa (CI95); O1/ES: 0.56 (0.4-0.72) Moderate; O2/ES: 0.32 (0.16-0.43) Fair; O3/ES: 0.31 (0.15-0.47) Fair; O1/O2: 0.52 (0.35-0.49) ; O2/O3: 0.51 (IC95:0.34 - 0.68) and O1/O3: 0,45 (IC95: 0.26-0.52), moderate.
Conclusions: Within the conditions of this study de agreement among visual and digital determination of tooth color appears to be related to the degree of training of the observer.
Methods: 73 dental students, (87.76% women and 12.33 men) with a mean (SD) age of 26.05 (± 4.36) years, in the fourth year of their dental degree at the University of Buenos Aires agreed to participate through an informed consent. Exclusion criteria were: having received a bleaching treatment in the previous 6 months, presence of total or partial peripheral restoration, tetracycline, fluoride or hypoplasia pigmentations, fracture, lesions in the right upper central incisor (1.1) and its absence. A dental prophylaxis procedure was performed on the bucal surface of each 1.1 with a prophylaxis brush (TDV) mounted on low-speed rotary instruments Kavo 2068 CHC (Germany) micromotor and a Kavo LUX K201(Germany) contra-angle. Shade measurement was performed in each subject in the middle third of the 1.1 by three independent observers, with different levels of clinical training (O1, O2, O3) in the same dental dental unit (Sino S2316) and time slot, and without using the light from the dental unit. Each subject was examined separately, without spandex with the VITA Classical guide system according to the manufacturer's instructions. The visual method was first applied and then, under the same conditions, the VITA Easyshade V spectrophotometer (Zahnfabrikn Bad Säckingen, Germany) which was calibrated before each determination according to manufacturer instructions. Data was analyzed with Fleiss Kappa and Cohen Kappa
Results: The agreement between all the observers and Easy Shade was moderate Fleiss Kappa (CI95): 0.48 (0.32-0.53), and also moderate among the 3 observers Fleiss Kappa (CI95): 0.49 (0.41-0.57 ). Between pairs of observers and EasyShade: Cohen Kappa (CI95); O1/ES: 0.56 (0.4-0.72) Moderate; O2/ES: 0.32 (0.16-0.43) Fair; O3/ES: 0.31 (0.15-0.47) Fair; O1/O2: 0.52 (0.35-0.49) ; O2/O3: 0.51 (IC95:0.34 - 0.68) and O1/O3: 0,45 (IC95: 0.26-0.52), moderate.
Conclusions: Within the conditions of this study de agreement among visual and digital determination of tooth color appears to be related to the degree of training of the observer.