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The effect of microwave disinfection on surface roughness and hardness of hot, cold acrylic resin and soft liner in different conditions | ||
| Journal of baghdad college of dentistry | ||
| Article 1, Volume 22, Issue 4, 2010, Pages 36-40 | ||
| Author | ||
| Rafah A. Ibrahem | ||
| Abstract | ||
| ABSTRACTBackground Microwave disinfection has been suggested as a method to disinfect the denture base and soft liner,however the effect of microwave heating on the surface roughness and hardness of cold cure acrylic resin, hot cureacrylic resin and soft liner have not been completely evaluated.Materials and Methods: 90 specimens of (12x12x3) mm were made from hot cure acrylic resin and cold cure acrylicresin and soft liner and divided into two groups, the first group was tested for surface roughness by profilometerbefore and after the specimen were disinfected by microwave in three different groups 40% concentration naclsolution, Distil water and dry irradiation of microwave for 10 min. And the other group also 45 specimens made fromthe same three different material were tested for hardness by a vicker’s hardness tester before and after disinfectionin 40% concentration nacl solution, Distil water and dry irradiation of microwave for 10 min.Results: Microwave disinfection for 10 minutes in different conditions 40% concentration nacl solution, Distil water anddry irradiation of microwave significantly increased the mean and SD values of surface roughness for hot acrylicresin, cold acrylic resin. And highly significant increase in mean SD values of surface roughness for soft liner materialsafter microwave disinfection in the three different conditions while the mean and SD values of hardness for cold, hotacrylic resin and liner materials does not significantly affected after microwave disinfection in the three conditions.Conclusion: Disinfection by microwave irradiation in 40% concentration nacl solution, Distil water and dry irradiationof microwave for 10 minutes increase the surface roughness for all the materials been evaluated but it did not effectthe hardness values of all materials been tested.Keywords: Microwave disinfection, surface roughness, hardness, soft liner, and nacl solution. (J Bagh Coll Dentistry2010;22(4):36-40). | ||
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