【摘要】：目的:探討Er:YAG激光預備對牙釉質表面性能及樹脂粘結強度的影響。方法:選取50顆無齲壞、無充填物的人離體前磨牙或磨牙,用渦輪手機按近遠中方向將離體牙切割成頰/舌兩部分,最終選取84個樣件,按不同的表面處理方法隨機分為7組(A-G組),每組12個樣件。每組2個樣件掃描電鏡觀察,其余10個樣件分別在處理后的牙釉質表面粘結光固化復合樹脂,進行剪切強度測試。結果:A組剪切強度最高(20.51±3.33)MPa。B、C、D組剪切強度次之,與A組比差異無統(tǒng)計學意義。E、F、G組剪切強度較弱,其中E組剪切強度與B、C、D組無顯著差異,F、G組與其他組有顯著差異。掃描電鏡觀察:隨著激光能量的增加,牙釉質表面粗糙度增加。激光處理后再進行酸蝕處理,牙釉質表面整體結構均勻,釉柱結構清晰可見,無玷污層。結論:Er:YAG激光處理牙釉質表面不能達到類似酸蝕的效果。激光加酸蝕能達到類似酸蝕的效果。牙釉質剪切粘結強度隨著激光能量的增加而增加。
[Abstract]:Objective: to investigate the effect of Er:YAG laser preparation on enamel surface properties and resin bonding strength. Methods: 50 undecayed and filling free premolars or molars were selected. The extracted teeth were cut into buccal and tongue parts by turbine cell phone, and 84 samples were selected. According to different surface treatment methods, 7 groups (group A-G) were randomly divided into 7 groups with 12 samples in each group. Two samples of each group were observed by scanning electron microscope, and the other 10 samples were bonded with light-cured composite resin on the surface of enamel after treatment, and the shear strength was tested. Results the shear strength of group A was the highest in group A (20.51 鹵3.33). There was no significant difference between group A and group A. the shear strength of group E was weaker than that of group A. there was no significant difference in shear strength between group E and group D. There was a significant difference between group E and other groups. SEM observation: with the increase of laser energy, the surface roughness of enamel increased. After laser treatment, the enamel surface was uniform, the enamel post structure was clearly visible, and there was no smear layer. Conclusion the treatment of enamel surface by W: er: YAG laser can not achieve the similar effect of acid etching. The effect of laser acid-etching is similar to that of acid-etching. The shear bond strength of enamel increases with the increase of laser energy.
【作者單位】： 南京大學醫(yī)學院附屬口腔醫(yī)院南京市口腔醫(yī)院;
【基金】：國家自然基金協(xié)作項目(編號:2014-27-280)
【分類號】：R783.1
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本文編號：2236727