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Volume 6, Issue 9 (Suppl) Dentistry 2016
ISSN: 2161-1122 Dentistry, an open access journal Euro Dental Congress 2016
October 24-26, 2016
October 24-26, 2016 Rome, Italy
15th Euro Congress on
Dental & Oral Health
Zahra Khamverdi, Dentistry 2016, 6:9 (Suppl)
Effect of CO2 laser and casein phosphopeptide amorphous calcium phosphate (CCP/ACP) paste on
micro-hardness of demineralized enamel
Zahra Khamverdi
Hamedan University of Medical Sciences, Iran
C O2 laser and application of casein phosphopeptide amorphous calcium phosphate (CPP/ACP) have been suggested to prevent
enamel demineralization and increase resistance to caries. There is a gap of information on the comparison of the efficacy of
laser and CPP-ACP. The purpose of this study was to compare the effect of CO2 laser irradiation and CPP/ACP application on micro-
hardness of demineralized enamel. 30 sound maxillary extracted teeth were selected. The crowns were cut at the cement enamel
junction and were then mesiodistally sectioned into facial and palatal halves. Specimens were then mounted in self-polymerizing
acrylic blocks measuring 4x4 mm in such way that the enamel surface was exposed. After a pH cycling model, the specimens were
randomly divided into four groups (n=15) as follows: G1: without treatment (control), G2: CO2 laser, G3: CPP/ACP and G4: laser plus
CPP/ACP treatment. The micro-hardness of each specimen was measured using Vickers hardness testing (500 gr loads, 5 seconds,
three points). Data were analyzed using ANOVA and Tukey’s tests (α= 0.05). The mean value of micro-hardness for demineralized
enamel in groups two to four were significantly greater than the value for group one (control) (P<0.05). The mean value in groups
two and three were not significantly different (P>0.05). Significant difference was found in micro-hardness of group four with two
and three groups (P<0.05). It was concluded that CO2 laser irradiation, application of CPP/ACP and combination of both increased
the micro-hardness of demineralized enamel.
Biography
Zahra Khamverdi has completed her graduation from Isfahan University. She is a Professor in Operative Dentistry department from Dental Faculty, Hamadan
University of Medical Sciences. She has given presentation in the field of Operative Dentistry, Aesthetic Dentistry and Dental Materials in international and national
conferences and published more than 35 papers in scientific journals and has been serving as a member of Dental Research Center.