[Effect of chemical compounds of Galla chinensis on enamel surface rehardening in vitro].
OBJECTIVE
To evaluate the effect of chemical compounds extracted from Galla chinensis on enamel surface rehardening in vitro.


METHODS
Sixty bovine enamel blocks with early carious lesions were randomly divided into six groups: group1 treated NaF (positive control); group2 with GCE; group3 with GCE-B; group4 with GCE-B1; group5 with GCE-B2 and group6 with deionized water (negative control). The lesions were subjected to a pH-cycling regime for 12 days. Surface enamel microhardness was measured on the enamel blocks before and after demineralization. After pH-cycling, and the percentage of surface microhardness recovery (SMHR) was calculated.


RESULTS
Obvious increase of the surface hardness of the enamel was observed in all the treatments except GCE-B2 and deionized water (P < 0.05).


CONCLUSIONS
The present study demonstrates the potential of the three GCEs (GCE, GCE-B and GCE-B1) to effect net rehardening of artificial carious lesions under dynamic pH-cyclic conditions.
Chu
Jin-pu
JP
Key Laboratory for Oral Biomedical Engineering of Ministry of Education, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
Li
Ji-yao
JY
Hao
Yu-qing
YQ
Zhou
Xue-dong
XD
D000818:Animals; D002417:Cattle; D003731:Dental Caries / Q000188:drug therapy*; D003743:Dental Enamel / Q000187:drug effects*; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D005707:Gallic Acid / Q000494:pharmacology*; D066298:In Vitro Techniques; D014089:Tooth Remineralization
D004365:Drugs, Chinese Herbal; D005707:Gallic Acid