CAJ | 학술논문

背景：当前临床托槽黏结前处理牙釉质的方法有酸蚀与喷砂两种，但将喷砂技术直接用于未处理牙釉质面的研究较少。 　　目的：观察酸蚀、喷砂处理方法对牙釉质表面的损伤程度，并比较两种不同牙釉质表面处理方法下金属托槽粘接强度的差异。 　　方法：将9颗人正畸拔除前磨牙随机均分为3组，分别进行喷砂、酸蚀与抛光清洁处理，扫描电镜下观察牙体表面粗化效果。将40颗人正畸拔除前磨牙随机均分为2组，分别进行喷砂、酸蚀处理，粘接托槽24 h后，利用材料力学实验机测定剪切强度，并统计粘接剂残留指数。 　　结果与结论：扫描电镜观察发现，抛光清洁处理组牙釉质表面光滑，无破坏；喷砂组与酸蚀组牙釉质遭到破坏，表面粗糙，并且喷砂组牙釉质的破坏程度更大。喷砂组粘接强度显著高于酸蚀组(P <0.05)，喷砂组与酸蚀组的粘接剂残留指数比较差异无显著性意义(P >0.05)。表明相对于酸蚀处理，喷砂处理可提高牙釉质与托槽的粘接强度，但对牙釉质的破坏程度更大。
배경：당전림상탁조점결전처리아유질적방법유산식여분사량충，단장분사기술직접용우미처리아유질면적연구교소。 　　목적：관찰산식、분사처리방법대아유질표면적손상정도，병비교량충불동아유질표면처리방법하금속탁조점접강도적차이。 　　방법：장9과인정기발제전마아수궤균분위3조，분별진행분사、산식여포광청길처리，소묘전경하관찰아체표면조화효과。장40과인정기발제전마아수궤균분위2조，분별진행분사、산식처리，점접탁조24 h후，이용재료역학실험궤측정전절강도，병통계점접제잔류지수。 　　결과여결론：소묘전경관찰발현，포광청길처리조아유질표면광활，무파배；분사조여산식조아유질조도파배，표면조조，병차분사조아유질적파배정도경대。분사조점접강도현저고우산식조(P <0.05)，분사조여산식조적점접제잔류지수비교차이무현저성의의(P >0.05)。표명상대우산식처리，분사처리가제고아유질여탁조적점접강도，단대아유질적파배정도경대。
BACKGROUND:There are two ways to treat the enamel before bracket bonding: etching and sandblasting, but the few studies focus on the direct use of sandblasting technology on untreated enamel surface. OBJECTIVE:To observe the damage of etchingversus sandblasting to the enamel surface, and to compare the bonding strength of metal brackets adhesive to isolated teeth with these two kinds of surface treatments. METHODS:(1) Nine premolar teeth removed for orthodontic treatment were randomized into three groups: sandblasting, acid etching and polishing treatment groups. Surface roughening effects of these three kinds of treatments were observed under scanning electron microscope. (1) Another 40 premolar teeth removed for orthodontic treatment were randomized into two groups: sandblasting and acid etching groups. At 24 hours after bracket bonding, the shear strength was detected using mechanical testing machine, and the adhesive residue index of tooth surface was statisticaly calculated. RESULTS AND CONCLUSION: (1) Under the scanning electron microscope, polishing treatment had no damage to the enamel surface; but in the other two groups, the enamel surface was damaged to varying degrees, especialy in the sandblasting group. (2) The bonding strength in the sandblasting group was significantly higher than that in the acid etching group (P < 0.05), but there was no difference in the adhesive residue index of tooth surface between the two groups (P > 0.05). These findings indicate that compared with the acid etching technology, the sandblasting technology can increase the bonding strength between the enamel and metal bracket, but it also results in more damage.