背景：改性玻璃离子水门汀提高了玻璃离子水门汀的机械性能、耐磨性和美观性，被逐渐应用于口腔临床的诸多方面，但对改性玻璃离子水门汀的氟释放行为和溶解特性尚不明确。目的：考察FujiⅡ传统型玻璃离子水门汀、Fuji Plus羟基磷灰石改性型玻璃离子水门汀、FujiⅨ金属增强型玻璃离子水门汀及FujiⅡLC光固化树脂改性型玻璃离子水门汀在人工唾液中的氟释放行为与溶解特性。方法：将4种玻璃离子水门汀试样浸没在人工唾液中，采用氟离子选择性电极测定试样浸泡0-28 d的氟释放量；利用分析天平测定试样浸泡3，7，14，28 d的质量，以算溶解率，采用SPSS软件和Origin软件分别进行氟释放量统计学分析和非线性拟合回归分析。结果与结论：各玻璃离子水门汀均在第1天达到最高的氟释放量，在随后几天迅速下降，之后保持稳定，其中FujiⅡLC光固化树脂改性型玻璃离子水门汀的氟释放单日量与累积量，以及溶解率显著高于其他3种玻璃离子水门汀(P <0.01)。方程Y=a+b*t0.5+c*t可较好模拟氟释放累积量变化过程，氟释放累积量与溶解率近似呈正比例关系。FujiⅡLC光固化树脂改性型玻璃离子水门汀达到最高的氟释放累积量与溶解率比值。

BACKGROUND:Modified glass ionomer cements improve the mechanical properties, abrasion resistance and beauty of traditional glass ionomer cements, and therefore they have been gradualy adopted in many fields of oral clinical application. However, it is not clear that the fluoride release behavior and soluble characteristics. OBJECTIVE:To investigate the fluoride release behavior and soluble characteristics of four glass ionomer cements in artificial saliva: Fuji II tranditional type, Fuji Plus hydroxyapatite modified type, Fuji IX metal modified type, and Fuji II LC light-curing resin modified type. METHODS: For each glass ionomer cement, cylindrical specimens were made and immerged into the artificial saliva. Fluoride release within 0-28 days was measured by using fluoride ion selective electrode. The weight of specimens was measured by using an analytical balance to further calculate the solubility. SPSS and Origin software were used for statistical analysis and nonlinear regression a

目的：观察新型自黏结树脂水门汀的黏结力，探讨其临床适用性。方法选择2010年5月~2011年10月在本院就诊的58例进行根管治疗的患者，随机分为试验组30例和对照组28例，试验组采用新型自黏结树脂水门汀黏结修复处理，对照组采用传统聚羧酸锌水门汀黏结修复处理，观察两组的患牙修复成功率并分别测试和记录1、3、6、12、24个月的黏结强度。结果试验组患牙修复成功率为97.1%（34/35），对照组患牙修复成功率为94.1%（32/34），两组比较差异无统计学意义（χ2=0.3795，P=0.5379）。1个月后，两组黏结强度比较差异无统计学意义（P〉0.05）；3、6、12、24个月后，试验组的黏结强度明显高于对照组，差异有统计学意义（P〈0.05）。结论相对于传统聚羧酸锌水门汀，新型自黏结树脂水门汀虽未明显提高患牙修复功率，但其黏结强度大，可以更好地增强黏结效果，值得临床推广应用。

Objective To observe the bonding power of new self-adhesive resin cement and discuss its clinical appli-cability. Methods Fifty-eight patients visited our hospital for root canal therapy from May 2010 to October 2011 were selected and divided into experimental group (n=30)and control group (n=28).In the experimental group,new self-adhe-sive resin cement for repair was applied,while in the control group,traditional zinc polycarbonoxylate cement was adopt-ed.The success rate of repair in the affected teeth was observed and the adhesive strength was measured and recorded after 1,3,6,12,24-month. Results The success rate of repair of the affected teeth in the experimental group was 97.1%(34/35),while in the control group,the rate was 94.1%(32/34),with no statistical difference (χ2=0.3795,P=0.5379).Adhe-sive strength in both groups after one month was compared,with no statistical difference (P>0.05).However,adhesive strength in the experimental group after 3,6,12,24 months was mo

目的：通过应用玻璃离子水门汀材料、光固化氢氧化钙垫底后光固化复合树脂材料及光固化氢氧化钙垫底后光固化流动树脂材料三种不同的楔状缺损修复方式，比较对照这三种修复方式的临床疗效。方法：临床选择180颗尖牙或是前磨牙牙齿楔状缺损需要修复的患者64例，分为A、B、C三组，每组60颗牙齿，分别采用玻璃离子水门汀材料、光固化氢氧化钙垫底后光固化复合树脂材料、光固化氢氧化钙垫底后光固化流动树脂材料三种方法修复楔状缺损，并于术后6个月随访观察疗效。结果：充填后6个月A、B、C组三种方法修复楔状缺损的成功率分别为81.67%、93.33%和95.00%，其中B、C两组高于A组，差异有统计学意义（P 0.05）。结论：对牙本质暴露的牙齿楔状缺损光固化氢氧化钙垫底后光固化流动树脂材料具有较高的修复效果。

10.3969/j.issn.1674-4985.2013.18.011

目的：对比4种树脂水门汀粘结Ceramage聚合瓷嵌体后的微渗漏,为临床选择树脂水门汀提供参考。方法：40个离体无龋前磨牙按嵌体制洞原则制备近中邻牙合面洞,Ceramage聚合瓷制作树脂嵌体后随机分为4组（n=10）,分别使用Rely X ARC、Rely X Unicem、Panavia F、ResiCem 4种树脂水门汀粘结嵌体。经冷热循环500次品红染色后,金刚砂片平行于牙体长轴沿近远中方向将修复体纵向剖开2次,在体视显微镜下测量染料渗入轴壁、颈壁的深度。结果：在轴壁4种材料微渗漏长度差异有统计学意义（F=8.04,P〈0.05）;Rely X Unicem组的微渗漏值高于Rely X ARC组（q=6.56）、Panavia F组（q=5.579）、ResiCem组（q=5.158）,差异有统计学意义（P〈0.05）,其他3组间差异无统计学意义（P〉0.05）。颈壁：不同材料间的微渗漏差异无统计学意义（F=2.112,P〉0.05）;同材料组的颈壁渗漏程度均显著高于轴壁（P〈0.05）。结论：Rely X Unicem对釉质的封闭效果较差;Rely X ARC、Panavia F、ResiCem均是粘结树脂嵌体理想的粘结剂。

AIM:To compare the microleakage of Ceramage polymerization ceramic inlay after cemented by 4 kinds of resin cement.METHODS:Mesial-occlusal cavity was prepared on 40 extracted caries free premolars.40 Ceramage polymerization ceramic inlays were made and were cemented into the cavities of the teeth by Rely X ARC, Rely X Unicem,Panavia F and ResiCem respectively(n =10).After 500 psychro-thermal cycles,the teeth were stained by fuchsin.The inlays were cut longetively and dye penetration was measured under microscope.RESULTS:In terms of shaft wall,significant difference in microleakage was found among the 4 groups by single factor analysis of variance (F=8.04,P 0.05).In terms of gingival wall,no statistically significant difference of microleakage was found among the 4 groups (F=2.112,P>0.05).In all groups,microleakage in gin-gival wall was significantly higher than that in shaft wall(P<0.05).CONCLUSION:The cementing effect of Rely X Unicem is the poorest among the 4 resin cements.

目的：探讨牙本质屏障法用于牙齿充填材料体外细胞毒性试验测定的特点。方法：低速锯片切新鲜拔除的磨牙,获取紧邻牙髓的颊侧牙本质片,选择通透值相近的牙本质片作为牙本质屏障,制作细胞毒性体外测试装置,用此装置测定氧化锌丁香油水门汀、复合树脂、玻璃离子水门汀、氢氧化钙水门汀、磷酸锌水门汀及阴性对照材料和阳性对照材料的细胞毒性,同时用传统的浸提液法测定这5种材料的细胞毒性。结果：牙本质屏障法测定的5种材料的细胞相对活性（%）分别为89.1±3.6、81.8±3.7、96.4±2.8、96.2±1.8、74.5±2.8;浸提液法测定的5种材料的浸提原液细胞相对活性（%）分别为35.6±5.2、72.9±4.3、91.5±1.3、90.2±2.6、59.3±2.6。结论：牙本质屏障可以显著减少充填材料对细胞的毒性作用,牙本质屏障法更能反映充填材料的体内细胞毒性。

AIM:To compare cell reaction to five common dental filling materials tested with an indirect contact method equipped with dentin barrier and a conventional extraction culture method.METHODS:Dentin discs with 0.5mm in thickness were cut from the buccal inner dentin of freshly extracted molars and were determined for hy-draulic permeability.The discs with similar permeability were used as barrier to prepare device for cytotoxicity test in vitro.Cytotoxicity of composite resin,ZOE,GIC,Ca(OH)2 and ZPC cement,was tested using both this device and conventional extraction culture method with MTT assay.RESULTS:Relative cell viability (RCV,%)obtained with dentin barrier for the five filling materials were:81.8 ±3.7,89.1 ±3.6,96.4 ±2.8,96.2 ±1.8 and 74.5 ±2.8 re-spectively.The RCV(%)obtained with extraction culture method were 72.9 ±4.3,35.6 ±5.2,91.5 ±1.3,90.2 ± 2.6 and 59.3 ±2.6 respectively.CONCLUSION:Dentin barrier reduced the toxicity of filling material to cells,and the