Study on Cavity Cleansing Agents Applied to the Dentin Wall in Composite Restoration

(1)调理后牙本质表面形态变化与牙本质渗透性的关系测量等渗生理盐水的过滤，发现即使用涂抹层覆盖牙本质表面，过滤效果也非常轻微。使用六种牙本质清洁剂调理后，测量开放小管的过滤率和面积率（总结见表1）。KE和SB显著提高了滤过率和开放小管面积率（t检验，P<0.01）。经线性回归分析，滤过率与开放小管面积率呈极显著相关（r=0.9214， P<0.01）。(2)调理后与牙本质的剪切结合强度与牙本质通透性的关系。每次调理后PHOTO bond ^<TM>和PHOTO CLEARFUL BRIGHT^<TM>与牙本质的剪切结合强度见表2。除15ED外，经KE处理的牙本质表面剪切结合强度显著高于其他各组（t检验，P<0.01）。经线性回归分析，剪切黏结强度与滤过率无显著相关（r=0.2036， P<0.05）。

(1) The relationship between morphologic changes on dentin surface and dentin permeability after conditioningThe filtration of isotonic saline was measured and found to be very slight even when smear layers were used to cover the dentin surface. The filtration rates and area rates of open tubules were measured after conditioning using six kinds of dentin cleansing agents (summary in Table 1). KE and SB significantly increased the filtration rate and the area rate of open tubules more than the other ones (t-test, P<0.01). There was a significant relationship between the filtration rate and the area rate of open tubules using linear regression analysis (r=0.9214, P<0.01).(2) The relationship between shear bond strength to dentin and dentin permeability after conditioningThe shear bond strength of PHOTO BOND^<TM> and PHOTO CLEARFUL BRIGHT^<TM> to dentin after each conditioning are shown in Table 2. The shear bond strength of the dentin surfaces conditioned with KE measured significantly higher than the others except 15ED (t-test, P<0.01). There was no significant relationship between the shear bond strength and the filtration rate using linear regression analysis (r=0.2036, P<0.05).