An in vitro study of the salivary protective effect on dental erosion

doi:10.3877/cma.j.issn.1674-1366.2011.01.004

Abstract

Abstract:

Objective

To explore the protective effect of salivary on dental enamel against citric acidic erosion between children with and without dental erosion.

Methods

Ten ml of unstimulated whole saliva were collected from 5 boys with dental erosion and 5 boys without dental erosion. Fifteen extracted premolars of adolescent were collected and 30 enamel slices were prepared. The enamel specimens were divided randomly into 3 groups： control group （deionized water）， salivary group of children with dental erosion， and salivary group of children without dental erosion. The enamel specimens were immersed into the agents respectively for 10 days and exposed to 0.3% critic acid 5 min twice a day. The surface roughness of all enamel specimens was imaged using an atomic force microscopy and the surface microhardness of enamel was measured using a microhardness tester.

Results

The value of surface roughness of the control group was significantly higher than the two salivary groups， while the value of microhardness of the control group was significantly lower than the two salivary groups （P＜0.001）. No significant difference was found between erosion salivary group and non-erosion salivary group （P=0.695， P=0.432）.

Conclusions

Saliva can protect the enamel against acidic erosion. However， there was no statistically significant difference in protective effect of salivary between children with or without dental erosion.

Key words: Saliva, Dental erosion, Children, Microhardness, Atomic force microscopy

Ping WANG, Huan-cai LIN. An in vitro study of the salivary protective effect on dental erosion[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2011, 5(01): 19-25.

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Figures/Tables 8

References 18

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组别	Ra（nm）
组别	实验前	实验后
酸蚀症唾液组	94.85±11.23	314.51±25.28
无酸蚀症唾液症	90.81±14.29	310.28±23.53
去离子水组	88.52±12.40	416.07±22.80

组别	Ra（nm）
组别	实验前	实验后
酸蚀症唾液组	94.85±11.23	314.51±25.28
无酸蚀症唾液症	90.81±14.29	310.28±23.53
去离子水组	88.52±12.40	416.07±22.80

组别	显微硬度（kg/mm²）
组别	实验前	实验后
酸蚀症唾液组	340.96±3.91	254.88±11.29
无酸蚀症唾液症	336.70±6.65	250.60±12.97
去离子水组	338.92±4.29	190.86±11.46

组别	显微硬度（kg/mm²）
组别	实验前	实验后
酸蚀症唾液组	340.96±3.91	254.88±11.29
无酸蚀症唾液症	336.70±6.65	250.60±12.97
去离子水组	338.92±4.29	190.86±11.46

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