[Color-difference evaluation of denture base resin based on CIECAM02 color appearance model].

OBJECTIVE: To compare the following color-difference equations: CMC, DE2000, CAM02-LCD, CAM02-SCD, CAM020-UCS, and to search for the most appropriate one to evaluate denture base resin. METHODS: Thirty-five denture based resin pieces which were aging during different time were measured using SP62 spectrophotometer and the color-difference was calculated using the above equations. PF/3, STRESS, and F-test of every calculation result were compared. RESULTS: PF/3 of CMC, DE2000, CAM02-LCD, CAM02-SCD, CAM020-UCS were: 22.448, 22.220, 22.840, 21.760, 22.049; STRESS of those were: 0.205, 0.228, 0.260, 0.192, 0.240. CONCLUSION: By comprehensive comparison of PF/3, STRESS and F-test, CAM02-SCD is the most appropriate equation for denture base resin, which was followed by CMC. The scatter diagram of color-difference showedthat color difference measured by instrument method is more objective and accurate compared with human eyes.