Koh S H, Chan J T, You C
Department of General Dentistry, University of Texas Dental Branch, Houston 77030, USA.
Gen Dent. 1998 May-Jun;46(3):278-80.
Clinicians often do not place pit and fissure sealants immediately after topical fluoride treatment because fluoride treatment might reduce bonding to enamel. The effect of NaF, SnF2, and APF on the in-vitro bond strength of two sealants to enamel was determined. The fluoride treatments and control (artificial saliva) were applied to enamel surfaces for four minutes and rinsed. A filled sealant (FluoroShield) and an unfilled sealant (Concise) were bonded to the etched enamel and debonded in tension using a universal testing machine. NaF increased the bond strength of the unfilled sealant; SnF2 and APF had no significant effect. NaF and APF decreased the bond strength of filled sealant while SnF2 had no significant effect. The bond strength of the filled sealant was higher than or equal to that of the unfilled sealant. Exposure of enamel to NaF, SnF2, or APF prior to placement of unfilled or filled sealants has no effect on in vitro bond strength between the enamel and the sealants.
临床医生通常不会在局部用氟治疗后立即放置窝沟封闭剂，因为氟治疗可能会降低与牙釉质的粘结。研究了NaF、SnF2和APF对两种封闭剂与牙釉质体外粘结强度的影响。将氟化物处理剂和对照物（人工唾液）应用于牙釉质表面4分钟后冲洗。将一种填充封闭剂（FluoroShield）和一种未填充封闭剂（Concise）粘结到酸蚀后的牙釉质上，并使用万能试验机进行拉伸脱粘。NaF提高了未填充封闭剂的粘结强度；SnF2和APF没有显著影响。NaF和APF降低了填充封闭剂的粘结强度，而SnF2没有显著影响。填充封闭剂的粘结强度高于或等于未填充封闭剂。在放置未填充或填充封闭剂之前，牙釉质暴露于NaF、SnF2或APF对牙釉质与封闭剂之间的体外粘结强度没有影响。
