Al-Suleiman Mahmoud, Silikas Nick, Watts David
Department of Orthodontics, Dental Faculty, The University of Aleppo, Aleppo-Syria.
Biomaterials Research Group, The University of Manchester, School of Dentistry, Manchester-UK.
J Orthod Sci. 2012 Jul;1(3):63-8. doi: 10.4103/2278-0203.103862.
To evaluate the effect of the application of either fluoride varnish (FV) or amorphous calcium phosphate (ACP) as preventive method on shear bond strength (SBS) at the same time of their bonding in vitro using self-etching primer (SEP) as an agent for enamel pre-treatment FV.
SIXTY HUMAN BICUSPIDS WERE RANDOMLY DIVIDED INTO FIVE GROUPS: G1 was rubbed by SEP for 5 s, G2 for 5 s by SEP and ACP, G3 for 10 s by SEP and ACP, G4 for 5 s by SEP and FV, and G5 for 10 s by SEP and FV. Stainless steel metal brackets were bonded. A Zwick/Roell Z020 Universal Testing Machine (Zwick GmbH and Co, Germany) with a 500 N load cell was used to test SBS. SBS values were analyzed using one-way analysis of variance (ANOVA) and Tukey's post hoc tests (P≤0.05). Differences in adhesive remnant index (ARI) values between groups were calculated.
The mean SBS values were 10.00±4.48 MPa, 5.71±4.3 MPa, 7.47±4.44 MPa, 4.4±2.39 MPa, and 3.98±0.83 MPa for groups 1-5, respectively. Significant differences in SBS values between all groups were found. The mean SBS values of groups 2, 4, and 5 were significantly lower than that of the G1. No significant difference was found between G3 and G1. Significant difference in ARI between the groups was found (P<0.001) and G1 had a significantly higher ARI.
The results suggested that the application of ACP at the same time of using SEP for 10 s has no effect on SBS.
评估在体外使用自酸蚀底漆（SEP）作为牙釉质预处理剂的同时，应用含氟涂料（FV）或无定形磷酸钙（ACP）作为预防方法对剪切粘结强度（SBS）的影响。
将60颗人双尖牙随机分为五组：G1组用SEP摩擦5秒，G2组用SEP和ACP处理5秒，G3组用SEP和ACP处理10秒，G4组用SEP和FV处理5秒，G5组用SEP和FV处理10秒。粘结不锈钢金属托槽。使用配备500N测力传感器的Zwick/Roell Z020万能材料试验机（德国Zwick有限公司）测试SBS。使用单因素方差分析（ANOVA）和Tukey事后检验分析SBS值（P≤0.05）。计算各组间粘结剂残留指数（ARI）值的差异。
1-5组的平均SBS值分别为10.00±4.48MPa、5.71±4.3MPa、7.47±4.44MPa、4.4±2.39MPa和3.98±0.83MPa。发现所有组之间的SBS值存在显著差异。2、4、5组的平均SBS值显著低于G1组。G3组和G1组之间未发现显著差异。发现各组间ARI存在显著差异（P<0.001），G1组的ARI显著更高。
结果表明，在使用SEP 10秒的同时应用ACP对SBS没有影响。
