An in vitro evaluation of the tensile and shear strengths of four adhesives used in orthodontics.
An in vitro evaluation of the tensile and shear strengths of four adhesives used in orthodontics.
复制标题
正畸中使用的四种粘合剂的拉伸和剪切强度的体外评估。
DOI：
10.1093/ejo/18.4.319
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发表时间：
1996
影响因子：
2.6
通讯作者：
P. McSherry
中科院分区：
文献类型：
--
作者：
P. McSherry
本文研究了四种釉质粘接剂的体外剪切强度和拉伸强度。检查的材料为System 1+、Vitrebond、C & B Metabond和Panavia-Ex（原始版本）。还在扫描电子显微镜下研究了每种材料的失效模式。将方丝网状支架粘结到已拔出的前磨牙的颊侧表面，并使用Instron 1011试验机施加力。结果表明，Panavia-Ex（喷砂托槽）的抗拉强度最高（P < 0.01）。Panavia-Ex与C & B Metabond（P < 0.05）和其他材料（P < 0.01）相比具有最高的剪切强度。C & B Metabond的剪切强度和拉伸强度最高（P < 0.01）。与Vitrebond相比，System 1+的拉伸强度无显著差异，但System 1+的剪切强度更强（P < 0.01）。失败的分析表明，50%的样本失败的粘合剂-搪瓷界面，25%的失败的组合模式，其余25%的失败，要么金属或内聚。
The in vitro shear and tensile strength of four enamel adhesives was investigated. The materials examined were System 1+, Vitrebond, C & B Metabond and Panavia-Ex (original version). The mode of failure of each material was also investigated under a scanning electron microscope. Edgewise mesh-backed brackets were bonded to the buccal surface of extracted premolar teeth and forces applied with an Instron 1011 testing machine. Results indicated that Panavia-Ex (with sandblasted brackets) had the highest tensile strength when compared to the other materials (P < 0.01). Panavia-Ex had the highest shear strength when compared to C & B Metabond (P < 0.05) and to the other materials (P < 0.01). C & B Metabond had the highest shear and tensile strength of the other adhesives (P < 0.01). No significant differences were found for System 1+ when compared to Vitrebond for tensile strength, but System 1+ was stronger for shear strength (P < 0.01). Analysis of failure shows that 50% of the samples failed at the adhesive-enamel interface, 25% failed in a combined mode and the remaining 25% failed either adhesively to metal or cohesively.