两种粘结剂对纤维根管桩粘固力的实验研究

目的比较磷酸锌水门汀和双固化树脂粘结剂粘结纤维树脂根管桩的粘固力差异,为临床合理选择粘结剂提供实验依据。方法选用经体外根管治疗的新鲜拔除人上颌中切牙60颗,随机分成2组,每组30颗,分别用磷酸锌水门汀和双固化树脂粘结剂粘结纤维树脂桩,用万能力学测试机测试纤维桩脱落个数并进行χ2检验。结果 2组脱落个数无显著性差异(P>0.05)。结论磷酸锌水门汀和双固化树脂水门汀都可以用于粘固纤维树脂根管桩,用磷酸锌水门汀可以降低医疗成本。     

光固化氢氧化钙制剂作为临时冠粘结剂的临床应用

目的 探讨光固化氢氧化钙制剂作为临时冠粘结剂的可行性.方法 纳入242例需行临时冠的患者,根据每月就诊周数顺序随机分为3组,每组患牙制作临时冠并分别采用TempoCemNE(n=78)、Provicol(n=80)、Calcimol LC(n=84)行临时冠粘结,1周后复诊,观察固位效果、牙龈状况以及牙髓状况,比较其临床效果.结果 1周后复诊,3组间总体的固位效果、牙龈状况以及牙髓状况比较,差异无统计学意义(c12=5.553,P1=0.062>0.05;c22=4.783,P2=0.091>0.05;c32=3.290,P3=0.193>0.05).结论 光固化氢氧化钙制剂Calcimol LC和临时冠粘结剂TempoCemNE、Provicol具有相似的粘结效果,牙龈和牙髓保护作用良好,操作简单,可作为一种新型临时冠粘结剂进行临床应用.     

LuxaCore冠核材料作为粘结剂对纤维桩固位力的影响

目的：纤维桩粘结过程中分别使用LuxaCore冠核材料（LuxaCore）和Paracem Universal DC（DC）树脂作为粘结剂,比较两者粘结效果的差异。方法：选用20颗新鲜拔除的单根前磨牙进行牙体预备,分别使用LuxaCore和DC作为粘结剂粘接纤维桩,电子力学试验机测试其固位力;扫描电镜观察两者粘接界面的差异;40例患者40颗牙应用LuxaCore和DC作为粘接剂进行纤维桩核冠修复,1年后复查,比较两者临床指标的差异。结果：两种粘结剂粘接的纤维桩固位力大小差异无统计学意义（P〉0.05）;两种粘结剂的纤维桩界面无明显差异;临床病例1年后复查,两种粘结剂的各临床指标无明显差异。结论：LuxaCore冠核材料对纤维桩的粘结效果与DC无显著性差异,可用于纤维桩的粘固。     

种植体基桩高度和表面积对三种粘结剂粘固效果的影响

目的：观察氧化锌丁香油水门汀（ZOE）、聚羧酸锌水门汀（PCC）、玻璃离子水门汀（GIC）对不同高度和表面积的种植基桩固位力的影响。方法：制备高度分别为3、4、5、6、7mm的5种不同高度的种植基桩及与基桩相匹配的金属基底冠。将不同高度基桩分为三组,分别用ZOE,PCC和GIC粘结金属基底冠和基桩。通过推拉力计测量垂直方向的脱位力。采用F检验,SNK-q和t检验比较各组数据之间的差异,比较基桩高度和表面积与脱位力之间的相关性。结果：在同一种粘结剂的粘结作用下,基底冠与不同高度的基桩产生的脱位力之间存在显著性差异（P〈0.05）;不同的粘结剂对不同高度和表面积的基桩与基底冠产生的脱位力之间部分存在显著性差异（P〈0.05）;基桩的高度和表面积与脱位力之间呈正相关关系（P〈0.05）。结论：基桩的高度和表面积对基桩的固位力有明显影响,当基桩高度较低时,不足以提供足够的固位力。基桩的高度和表面积均能较好地代表固位力     

不同粘结剂对玻璃纤维桩固位力影响的研究

目的：玻璃纤维桩以不同粘结材料粘固于根管内,测量并比较固位力的差别,为临床上选用合适的粘结材料提供参考。方法：将完整的已行根管治疗的离体人上中切牙30颗,分别于邻面釉牙骨质界水平截断,并机械预备根管,然后包埋在塑料柱内,随机分为3组,每组10个,用XL-50A型拉力试验机测量并记录桩脱位时所受的拉力。结果：3种粘结剂粘固同种大小桩时,粘结力相互间均有显著差别（P〈0．05）。结论：不同粘结剂对玻璃纤维桩的固位力有显著性影响。     

不同材料和粘结剂对悬臂梁桥力学性能影响的研究

本研究探讨了不同材料的悬臂梁式固定桥经不同粘结剂粘结前后的力学性能的变化,希望对临床提供一定指导。     

两种正畸粘结剂的临床应用观察

在使用固定矫正器的正畸治疗的过程中,托槽的粘结强度无疑对治疗效果起着至关重要的作用。本文通过对两种粘结剂粘贴托槽的临床效果观察,对其作出评价。１临床资料１．１临床资料为排除病例难易程度、受力不同及牙齿质量等因素对托槽粘结强度的影响,本文病例是从１９９...     

Luxatemp临时冠桥材料的临床应用效果研究

目的研究Luxatemp临时冠桥材料的临床应用效果。方法169例312颗需行烤瓷冠桥修复的活髓牙,用Luxatemp临时冠桥材料制作临时冠桥,从临时冠边缘适合性、解剖形态、颜色、表面光滑度4个方面评价临床效果。结果临时冠边缘适合性、解剖形态、颜色、表面光滑度的满意度分别为97.76%、100.00%、95.19%、88.78%。结论Luxatemp临时冠桥材料制作临时冠桥美观、方便,对牙髓刺激小,适合临床应用。     

托盘粘结剂对硅橡胶印模材料与托盘材料间粘结强度的影响

目的：研究托盘粘结剂对硅橡胶印模材料与不同托盘材料间粘结强度的影响。方法：分别选用GC和3M二种硅橡胶,托盘材料为不锈钢和自凝塑料,托盘粘结剂为GC和3M公司提供的专用粘结剂,进行交互使用,不涂粘结剂的作为对照组,共12组。各组均为6个样本。印模材料的调和按厂商说明进行,注入专门的测试装置中。等印模材料完全凝固后,把整个装置连接到万能测力仪上进行拉力测试,以5mm／min的速度拉伸直到粘附脱落。所得数据用SAS软件进行统计分析。结果：托盘粘结剂的使用能显著提高硅橡胶印模与托盘的粘结强度（P〈0．01）。在不使用托盘粘结剂时,不同托盘之间的粘接强度差异无统计学意义（P=0．1559）;且不同托盘材料与不同硅橡胶印模材料间无交互影响作用（P=0．8226）。无论使用哪种硅橡胶印模材料或哪种托盘材料,应用GC托盘粘结剂组的粘结强度均高于3M托盘粘结剂组（P〈0．01）。结论：临床取模过程中在托盘表面应用粘接剂能有效的改善硅橡胶印模材料和托盘的粘接强度,从而提高印模的精确性。不同厂家提供的专用粘结剂可交互使用。     

粘结剂在光固化复合树脂的层间粘结中作用的临床探讨

近十年来光固化复合树脂已广泛应用于牙体部分缺损、牙体形态异常、牙间隙及变色牙等临床修复.由于光固化复合树脂本身强度、临床操作技术等原因,修复体出现磨损、碎裂而部分脱落,在牙上余留的部分树脂受到口腔环境的污染,利用光固化复合树脂的粘结技术在污染的底层树脂上用新的光固化复合树脂添加恢复修复体缺损的部分,既能恢复美观、功能的要求又节省时间和材料.     

Influence of eugenol-containing temporary cement on bonding of self-etching adhesives to dentin

PURPOSE: To investigate the influence of eugenol-containing temporary cement on bonding of resin composite to dentin mediated by self-etching adhesives. MATERIALS AND METHODS: Flat dentin surfaces were produced by grinding of extracted human molars. The dentin surfaces were either used directly or after a one-week exposure to a zinc oxide-eugenol cement (IRM). A resin composite (Herculite XRV) was bonded to the dentin surfaces following treatment with 1 of 6 self-etching adhesives (AdheSE, Adper Prompt L-Pop, Clearfil SE Bond, iBond, OptiBond Solo Plus - Self-Etch Adhesive System, and Xeno III). An adhesive system containing 0.5 M EDTA as dentin conditioner (Gluma Classic) was included as negative control, and an etch-and-rinse adhesive system (OptiBond FL) was included as positive control. After storage in water at 37 degrees C for 1 week, the bonded specimens were fractured in shear (n = 8 in each group). RESULTS: Previous contact of dentin with zinc oxide-eugenol cement significantly decreased the bond strength mediated by the negative control and did not affect the bond strength mediated by the positive control. For the self-etching adhesives, no effect was found of previous contact with zinc oxide-eugenol cement. With and without previous contact with zinc oxide-eugenol cement, the etch-and-rinse adhesive system yielded a significantly higher bond strength than all other adhesive systems. CONCLUSION: Previous contact with zinc oxide-eugenol cement did not decrease the bond strength of resin composite to dentin mediated by self-etching adhesives. This finding suggests that eugenol-containing temporary cements may be safe to use in combination with self-etching adhesives.     

Effects of temporary cementation on permanent cement retention to composite resin cores

This in vitro study compared the effects on retention of base metal cylindrical retainers placed on composite resin cores when pretreated with eugenol and noneugenol temporary cements. Sixty composite cores and base metal cylindrical retainers were tested. The cores were pretreated with eugenol and noneugenol temporary cements before eventual cementation with resin and zinc phosphate cements. Cemented core retention was measured by application of a compressive force to the cores in an Instron machine. Differences were found between the two permanent cements. Pretreatment with eugenol cement reduced retainer retention with resin cements, but had no effect with zinc phosphate cement. Pretreatment with noneugenol cement did not reduce retainer retention.     

Effect of a ZOE temporary cement on the bond strength of a resin luting cement

This study was conducted to determine if a eugenol-based temporary cement affected the bond strength of a dual-cure cement to etched enamel. Dicor buttons were cemented to etched enamel surfaces after pretreatment with a non-eugenol containing cement, a eugenol containing cement and a control. This study concluded that shear bond strengths were unaffected by the temporary cement, provided the enamel surface was cleaned with pumice and etched with 37% phosphoric acid.     

The temperature of cement specimens and its influence on measured strength

The change in temperature in cylindrical specimens of 7 different dental cements was measured under various storage conditions after removal from a water bath at 37°C. The strength of these cements was also measured using the same type of specimens in water at 37°C and at 0.5, 1, 5 and 60 min after removal from the water bath. All cements showed a rapid drop in temperature after removal from the water, somewhat dependent on the handling of the specimens. A significant increase in strength was shown for all cements during the first minutes after removal from the water bath. Testing cements at room temperature requires specific instructions with regard to the handling of the specimens and to the time after removal from the water bath for application of the load. Testing in water at 37°C eliminates these problems.     

Effect of eugenol and non-eugenol containing temporary cement on permanent cement retention and microhardness of cured composite resin

This present study had three aims: 1) to evaluate the bond strengths of carboxylate and resin cements in cementing cast Co-Cr crowns to pretreatment of composite resin cores with eugenol and non-eugenol containing temporary cements, 2) to determine the microhardness of composite resin treated with temporary cement, 3) to view the surface differences of composite resin with SEM. The composite cores were divided into three experimental groups for the following pretreatments: Group 1, No treatment was provided, Group 2, The external walls of the composite cores were covered with eugenol-containing temporary cement, Group 3, The external walls of the composite cores were covered with non-eugenol containing temporary cement. Analysis of variance results showed that there was a significant difference between all three groups. Temporary cement with eugenol was significantly reduced the bond strength of full crown casting with resin cement compared with non-eugenol. The resin specimens treated with the eugenol-containing temporary cement showed the lowest microhardness values, the non-eugenol-containing temporary cement was not significantly different from those of the control groups.     

粘结剂使用方式对全酸蚀树脂水门汀与牙本质粘结性能影响的研究

目的评价粘结剂的3种不同使用方式（不使用粘结剂,粘结剂不固化及粘结剂固化10 s）对全酸蚀树脂水门汀与牙本质间粘结性能的影响。方法新鲜拔除的无龋人第三磨牙45颗,随机分为9组（n=5）,流水降温下磨除冠部牙釉质,制备标准牙本质粘结面,酸蚀冲洗后表面按全酸蚀粘结技术处理,牙本质粘结剂处理方式按设计进行,然后与3种全酸蚀树脂水门汀（Rely X ARC、Calibra、VariolinkⅡ）粘结并测试微拉伸粘结强度,用扫描电镜观察粘结界面。结果对于3种全酸蚀树脂水门汀,不使用粘结剂组未测得粘结强度;粘结剂不固化组及粘结剂固化10 s组均获得较为满意的粘结强度,不固化组的微拉伸粘结强度（15.534±2.099;22.827±6.968;10.736±3.199）显著高于粘结剂固化10 s组（13.476±2.710;14.076±5.165;7.736±3.052）（P〈0.05）。结论①全酸蚀树脂水门汀应结合粘结剂同时使用。②牙本质涂布粘结剂后不单独固化可显著提高全酸蚀树脂水门汀与牙本质的粘结强度。     

氧化锌丁香油对3种永久粘固剂剪切强度影响的研究

目的研究氧化锌丁香油对3种永久粘固剂与牙本质间粘结强度的影响。方法将因正畸需要拔除的60颗前磨牙制成试样块并用树脂包埋,一面暴露作为测试面,去除其釉质暴露浅层牙本质并用砂纸磨平。分为玻璃离子组(Ⅰ组)、树脂改性玻璃离子体组(Ⅱ组)、树脂粘结剂组(Ⅲ组),然后各组再分为对照组(A组),氧化锌丁香油组(B组),每组10个试样。在万能试验机上测试4 mm直径树脂块在A、B两种条件下用3种永久粘结剂粘固后的剪切强度。并用扫描显微镜观察剪切后试样表面形貌。结果 3组受氧化锌丁香油影响较大((3.22±1.47)MPa对比(1.22±0.35)MPa,P=0.001),1组、2组在A、B两种条件下剪切强度差异无统计学意义(P>0.05)。结论使用氧化锌丁香油粘固剂预处理牙本质表面,对树脂类粘固剂有不利影响,而对玻璃离子和树脂改性玻璃离子体无不利影响。     

Effects of thermocycling on the tensile bond strength between resin cement and dentin surfaces after temporary cement application

PURPOSE: In a previous study the authors found that 2 of 3 tooth conditioners examined were able to reduce the negative effect of temporary cement on the bond strength between resin cement and teeth. The aim of this study was to evaluate the bond durability with the conditioners, as well as their capability for temporary cement dissolution. MATERIALS AND METHODS: After eliminating the temporary cement with a curette from the bovine dentin surface, a conditioner (ethyl dihydrogen phosphate, EP; or methacryloxyethyl dihydrogen phosphate, MEP) was applied to the surface and a resin cement was adhered. Tensile bond strength measurement, scanning electron microscopic observation, and energy-dispersive analysis were carried out without thermocycling and after thermocycling. RESULTS: The tensile bond strength gradually decreased with an increase in the number of thermocycles. However, specimens treated with EP or MEP showed significantly higher tensile bond strength values compared to those that did not receive conditioner application (P < 0.0001); EP showed significantly higher tensile bond strength values compared to the specimens that did not receive both temporary cement and conditioner application (P < 0.0001). The scanning electron microscopic, energy-dispersive, and solubility analyses suggest that both conditioners have the capability of dissolving temporary cement remnants. CONCLUSION: Both EP and MEP have potential value as conditioners to reduce the negative effect of temporary cement on the bond strength between resin cement and dentin and to improve the bond durability.