Chemical Changes Associated with Increased Acid Resistance of Er:YAG Laser Irradiated Enamel
Table 1
Mean values and standard deviations of elements’ atomic percentages and the Ca/P ratio on the irradiated enamel surface by experimental groups and stages.
Element
Average value and standard deviation
Group I: control
Group II: 100 mJ
Group III: 200 mJ
Group IV: 300 mJ
Untreated surface
After acid dissolution
Before irradiation
After irradiation
After acid dissolution
Before irradiation
After irradiation
After acid dissolution
Before irradiation
After irradiation
After acid dissolution
Carbon C
Oxygen O
Phosphorus P
Chlorine Cl
Calcium Ca
Ca/P ratio
Groups with different letters are significantly different ().