title: Effect of enamel organic matrix on the potential of Galla chinensis to promote the remineralization of initial enamel carious lesions in vitro.
abstract: Galla chinensis, a natural traditional Chinese medicine with main composition of tannic acid and gallic acid, is formed when the Chinese sumac aphid Baker (Melaphis chinensis bell) parasitizes the levels of Rhus chinensis Mill. Galla chinensis has shown the potential to enhance the remineralization of initial enamel carious lesion, but the mechanism is still unknown. This study was to investigate whether the enamel organic matrix plays a significant role in the potential of Galla chinensis to promote the remineralization of initial enamel caries. Bovine sound enamel blocks and non-organic enamel blocks were demineralized and exposed to a 12 day pH cycling. During the pH cycling, 30 specimens with the enamel organic matrix were randomly divided into three groups, and treated with 1 g L(-1) NaF (group A), 4 g L(-1) Galla chinensis extract (group B1) or double deionized water (group C1). Twenty specimens without the enamel organic matrix were randomly divided into two groups, and treated with 4 g L(-1) Galla chinensis extract (group B2) or double deionized water (group C2). The integrated mineral loss and lesion depth of all the specimens were analysed by transverse microradiography. The integrated mineral loss and lesion depth of group B1 were less than those of groups B2, C1 and C2, and there were no statistical differences among groups B2, C1 and C2. In conclusion, Galla chinensis can enhance the remineralization of initial enamel carious lesion, and the enamel organic matrix plays a significant role in this potential of Galla chinensis.
authors.affiliation: State Key Laboratory of Oral Diseases, West China College of Stomatology, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China.
authors.forename: Linglin
authors.initials: L
authors.lastname: Zhang
authors.forename: Ling
authors.initials: L
authors.lastname: Zou
authors.forename: Jiyao
authors.initials: J
authors.lastname: Li
authors.forename: Yuqing
authors.initials: Y
authors.lastname: Hao
authors.forename: Liying
authors.initials: L
authors.lastname: Xiao
authors.forename: Xuedong
authors.initials: X
authors.lastname: Zhou
authors.forename: Wei
authors.initials: W
authors.lastname: Li
mesh_terms: D000818:Animals; D001857:Bone Matrix / Q000187:drug effects*; D002113:Calcification, Physiologic / Q000187:drug effects*; D002417:Cattle; D003731:Dental Caries / Q000188:drug therapy* / Q000503:physiopathology*; D003743:Dental Enamel / Q000187:drug effects*; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D005240:Feasibility Studies; D066298:In Vitro Techniques
chemical_list: D004365:Drugs, Chinese Herbal