2010 Volume 53 Issue 1 Pages 73-79
The purpose of this study was to evaluate two kinds of commercial tooth-surface coating materials as anti-demineralizing agents. Cementum surfaces of extracted bovine incisors were used in this study. The samples consist of "coating" surfaces and "non-coating" surfaces. "Coating" cementum surfaces were treated with either "Pain-Free Desensitizer®" (Group P) or "G-Coat®" (Group G), while "non-coating" cementum surfaces were not treated at all. Samples were immersed in 0.1mol/l lactic acid solution (pH=4.8) for 36 hours. After immersion, they were observed with a light microscope, and the thicknesses of demineralized or remaining areas were measured. In both groups, 10 samples were evaluated. One-way analysis of variance (ANOVA) and Fisher's PLSD test were used to determine significant differences of the results. And the cementum-material interfaces were observed with a scanning electron microscope (SEM). The results were as follows: 1. Thickness of "non-coating" bovine cementum demonstrated a significant decrease compared with "coating" cementum. In group P, the thickness of "non-coating" cementum decreased 38.8% compared with "coating" cementum. In group G, it decreased 28.4%. There was no statistically significant difference between the groups. 2. SEM observation revealed no gap formations between tooth-surface coating materials and teeth surfaces in both experimental groups. These results suggested that root surface cementum treated with tooth-surface coating materials could have anti-demineralizing properties.
