Abstract
The purpose of this study was to improve the property of photo-cured type denture relining resins. Specimens of three commercial resins were cured under 4 conditions (condition 1: photo-cure follow ing manufacturer's instructions, condition 2: condition 1 +heating at 60 for 15 minutes, condition 3: repeat condition 1 three times, condition 4: condition 3+condition 2).
1. The amount of eluted monomers under conditions 2, 3 and 4 measured by HPLC was decreased compared with that of condition 1.
2. The amount of generated radicals under condition 2, 3 and 4 measured by ESR was decreased compared with that of condition 1.
3. The curing depth, water sorption and transverse strength were increased compared with those of condition 1.
4. The adaptability, surface hardness and surface roughness were not influenced by curing conditions.
The results suggested that condition 4 is the most effective method to improve the property of photo-cured type denture relining resins, and condition 3 is a simple and effective method for clinical use.
