摘要
目的 研究用于正畸托槽粘接的树脂改良型玻璃离子粘固剂的抗剪切强度。方法 30颗离体前磨牙平均分为 2组。一组用树脂改良型玻璃离子粘固剂 (Advance)粘接方丝弓正畸托槽 ,另一组用复合树脂釉质粘接剂 (DM)粘接。 2 4h后用材料力学试验机检测两种材料的抗剪切强度 ,统计牙面上粘接材料的残留指数。结果 2种粘接材料的抗剪切强度相似 [玻璃离子粘固剂为 (6 86 2±2 142 )MPa,复合树脂粘接剂为 (7 183± 3 2 0 5 )Mpa],差异无显著性。结论 体外研究中 ,树脂改良型玻璃离子粘固剂的抗剪切强度已达到复合树脂釉质粘接剂的水平 。
Objective The purpose of this study was to investigate the shear bond strength of resin modified glass ionomer used for orthodontic bracket bonding Methods 30 extracted premolars were evenly divided into two groups Edgewise brackets (Orsu) were bonded with resin modified glass ionomer (Advance) in group one and with composite resin (DM) in group two The shear bond strengths of two materials were tested by material testing machine after 24 hours The adhesive remnant index was scored after debonding Results The shear bong strengths of resin modified glass ionomer and composite resin were (6 862±2 142) MPa and (7 183±3 205) MPa respectively There were no statistically significant differences between two groups Conclusions In vitro bond strength of resin modified glass ionomer had reached the same level of composite resin It had the prospect of clinic use
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2000年第3期227-229,共3页
Chinese Journal of Stomatology
