ENAMEL DEMINERALIZATION DEPTH OF EXTRACTED YOUNG PERMANENT TEETH CAUSED BY CARBONATED BEVERAGE
Objective To investigate the change in microstructure and enamel demineralization depth of extracted young permanent teeth treated by carbonated beverage for different periods of time.Methods A total of 40 young permanent premolars were collected from orthodontic extraction.After being immersed in coca-cola for 1 week,the premolars were randomly divided into groups A,B,C,and D,with 10 premolars in each group.A scanning electron microscope was used to observe the morphological change of enamel surface in group A and enamel demineralization depth in group B.The premolars in groups C and D were immersed in human saliva with a volume fraction of coca-cola of 0.10 for 1 month,and then a scanning electron microscope was used to observe the morphological change of enamel surface in group C and enamel demineralization depth in group D.Results Group A had an irregular shape of enamel surface with a number of tiny crevices and rough surface.In group B,demineralization occurred at superficial enamel.Group C showed aggravated enamel demineralization with numerous holes at the enamel surface and an alveolate shape.Group D had demineralization in enamel and a significantly greater enamel demineralization depth than group B (x2 =5.0,P＜0.05).Conclusion Carbonated beverage may cause enamel demineralization,and the degree of enamel demineralization increases over the time of exposure to carbonated beverage.Demineralization caused by carbonated beverage is limited to the enam el,without the involvement of dentin.
NETL
NSTL
万方数据
维普
