Objective:To explore the effects of surface bonding on compressive strength of chemically-cured(Dycal) and light-cured (Calcimol LC) calcium hydroxide.Methods:32 experimental specimens were prepared and divided into 4 groups(n =8):Group A,Dcyal without surface bonding;Group B,Calcimol LC without surface bonding;Group C,Dycal with surface bonding;Group D,Calcimol LC with surface bonding.German Zwick universal electronic testing machine was used to test the compressive strength of the specimens.Results:The average compressive strength value of group A,B,C and D was (110.48 ± 19.9),(162.6 ±7.8),(136.8 ± 17.2) and (223 ± 31.1) MPa respectively.Among them,the compressive strength of Group D was the highest (P ＜ 0.05).Compressive strength value of group B was higher than that of group A (P ＜ 0.05).No statistical difference was detected between other groups.Conclusion:The compressive strength of Light-cured Calcium Hydroxide is higher than that of chemically-cured Calcium Hydroxide.Surface bonding treatment can improve the compressive strength of Light-cured Calcium,no apparent effects can be produced on chemicallycured Calcium Hydroxide.%目的:比较化学固化氢氧化钙(Dycal)和光固化氢氧化钙(Calcimol LC)表面粘接处理后对其压缩强度的影响.方法:制备实验试件32个,分4组(n=8):A组为Dycal组;B组为Calcimol LC组;C组为粘接处理的Dycal组;D组为粘接处理的Calcimol LC组.采用德国Zwick电子万能试验机对各个试件进行压缩强度检测.结果:A、B、C、D组的平均压缩强度值分别为(110.48±19.9)、(162.6±7.8)、(136.8±17.2)和(223±31.1) MPa.D组压缩强度值高于其他3组(P＜0.05),B组的压缩强度值高于A组(P＜0.05),其他组间无明显统计学差异.结论:光固化氢氧化钙的压缩强度高于化学固化氢氧化钙,光固化氢氧化钙表面粘接处理后,提高了充填体的压缩强度,而化学固化氢氧化钙表面粘接处理对其压缩强度没有影响.
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