Filler S J, Lazarchik D A, Givan D A, Retief D H, Heaven T J
University of Alabama School of Dentistry, Birmingham.
Am J Dent. 1994 Apr;7(2):85-8.
This study determined the shear bond strength (SBS) of composite bonded to chlorhexidine-treated enamel and untreated enamel. Fifty human molars were mounted in cold- cure acrylic and the superficial enamel of the buccal or lingual surface was exposed using 600-grit silicon carbide paper. During the experimental protocol, the control group (n = 25) and the experimental group (n = 25) were stored in distilled water at 37 degrees C. The experimental group was immersed in 0.12% chlorhexidine gluconate for 1 minute, 4 times daily, for 7 days. Prisma APH composite was then bonded to all samples following acid etching for 30 seconds, and the SBS was determined. Shear bond strengths for the control (13.23 +/- 3.22 MPa) and the experimental (13.67 +/- 4.59 MPa) groups were not significantly different using a t-test. The result may be attributed to either a lack of effect of chlorhexidine or to the acid etch which dissolves the affected superficial enamel leaving an unaffected substrate for bonding.
本研究测定了复合树脂与经氯己定处理的牙釉质和未经处理的牙釉质之间的剪切粘结强度（SBS）。将50颗人类磨牙固定在冷固化丙烯酸树脂中，使用600目碳化硅砂纸暴露颊面或舌面的表层牙釉质。在实验过程中，对照组（n = 25）和实验组（n = 25）均在37℃的蒸馏水中保存。实验组每天4次浸泡在0.12%葡萄糖酸氯己定中1分钟，共7天。然后在酸蚀30秒后，将Prisma APH复合树脂粘结到所有样本上，并测定SBS。使用t检验，对照组（13.23±3.22 MPa）和实验组（13.67±4.59 MPa）的剪切粘结强度无显著差异。该结果可能归因于氯己定缺乏效果，或者是酸蚀溶解了受影响的表层牙釉质，留下未受影响的粘结基底。
