Maleknejad Fatemeh, Ameri Hamideh, Manafi Safa, Chasteen Joseph, Ghavamnasiri Marjaneh
Department of Operative Dentistry, Mashhad Dental School and Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
Indian J Dent Res. 2013 Mar-Apr;24(2):225-8. doi: 10.4103/0970-9290.116690.
The degree of conversion of dental adhesive is an important parameter since poor mechanical properties are related to low percentage of monomer-to-polymer conversion within resin-based materials.
To evaluate the influence of polymerization time and light guide distance on the degree of conversion (DC) of three contemporary dental adhesives.
The spectral data of ExciTE DSC, Single Bond ® , and Adper ® Prompt L-Pop were analyzed using FTIR spectroscopy after 20 s, 40 s, and 60 s of photoactivation times. Light tip distances were kept at 1, 3, and 6 mm during the exposures.
Data were analyzed using ANOVA and Tukey's test (α = 0.05).
Within groups, greater DC values were found using a tip distance of 1 mm or a 60-s curing time for Single Bond ® (59%) and Adper ® Prompt L-Pop (65%). No statistically significant difference (P > 0.05) was found using either 1 mm or 3 mm tip distances after 20 s, 40 s, and 60 s of light curing time for Single Bond ® . ExciTE ® DSC showed the greatest DC values with light tip distances of 1 mm (90%) and 3 mm (89%), using 60 s of light curing.
The self-etch adhesive Adper ® Prompt L-Pop could be applied in shallow cavity preparations and must be light cured for at least 40 s. The light-cured total-etch adhesive ExciTE ® DSC could be applied in every restorative scenario if the curing time is extended up to 60 s or if the tip distance is extended up to 3 mm.
由于树脂基材料内单体到聚合物的转化率低与机械性能差相关，因此牙科粘合剂的转化率是一个重要参数。
评估聚合时间和光导距离对三种当代牙科粘合剂转化率（DC）的影响。
在光激活20秒、40秒和60秒后，使用傅里叶变换红外光谱法分析ExciTE DSC、Single Bond®和Adper®Prompt L-Pop的光谱数据。曝光期间，光尖端距离保持在1毫米、3毫米和6毫米。
数据采用方差分析和Tukey检验（α = 0.05）进行分析。
在各组中，对于Single Bond®（59%）和Adper®Prompt L-Pop（65%），使用1毫米的尖端距离或60秒的固化时间可获得更高的DC值。对于Single Bond®，在光固化20秒、40秒和60秒后，使用1毫米或3毫米的尖端距离未发现统计学显著差异（P > 0.05）。ExciTE®DSC在光固化60秒时，使用1毫米（90%）和3毫米（89%）的光尖端距离显示出最高的DC值。
自酸蚀粘合剂Adper®Prompt L-Pop可应用于浅窝洞制备，且必须光固化至少40秒。如果固化时间延长至60秒或光尖端距离延长至3毫米，光固化全酸蚀粘合剂ExciTE®DSC可应用于各种修复情况。
