Paris S, Meyer-Lueckel H, Kielbassa A M
Dept. of Operative Dentistry and Periodontology, University School of Dental Medicine, Campus Benjamin Franklin, Charité-Universitätsmedizin Berlin, Berlin, Germany.
J Dent Res. 2007 Jul;86(7):662-6. doi: 10.1177/154405910708600715.
Infiltration of non-cavitated caries lesions with light-curing resins could lead to an arrest of lesion progression. The aim of this study was to evaluate the penetration of a conventional adhesive into natural enamel caries after pre-treatment with two different etching gels in vitro. Extracted human molars and premolars showing proximal white-spot lesions were cut across the lesions perpendicular to the surface. Corresponding lesion halves were etched for 120 sec with either 37% phosphoric acid gel (H(3)PO(4)) or 15% hydrochloric acid gel (HCl), and subsequently infiltrated with an adhesive. Specimens were observed by confocal microscopy. Mean penetration depths (SD) in the HCl group [58 (37) microm] were significantly increased compared with those of the H(3)PO(4) group [18 (11) microm] (p < 0.001; Wilcoxon). It can be concluded that etching with 15% hydrochloric acid gel is more suitable than 37% phosphoric acid gel as a pre-treatment for caries lesions intended to be infiltrated.
用光固化树脂浸润非龋洞性龋损可使病损进展停止。本研究的目的是在体外评估两种不同蚀刻凝胶预处理后一种传统黏结剂渗入天然牙釉质龋的情况。将显示邻面白斑病损的拔除人类磨牙和前磨牙垂直于表面横切病损。相应的病损一半用37%磷酸凝胶（H₃PO₄）或15%盐酸凝胶（HCl）蚀刻120秒，随后用一种黏结剂浸润。通过共聚焦显微镜观察标本。与H₃PO₄组[18（11）微米]相比，HCl组的平均渗透深度[58（37）微米]显著增加（p<0.001；Wilcoxon检验）。可以得出结论，对于拟浸润的龋损，用15%盐酸凝胶蚀刻作为预处理比37%磷酸凝胶更合适。
