树脂改良玻璃离子体与磨牙制备或激光处理（铒：钇铝石榴石）牙齿的牙釉质之间的剪切粘结强度比较
Comparison of the Shear Bond Strength of Resin Modified Glass Ionomer to Enamel in Bur-Prepared or Lased Teeth (Er:YAG).
作者信息
Jafari Ahmad, Shahabi Sima, Chiniforush Nasim, Shariat Ali
机构信息
Associate Professor, Pedodontic Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
出版信息
J Dent (Tehran). 2013 Mar;10(2):119-23. Epub 2013 Mar 31.
OBJECTIVE
The purpose of this study was to evaluate the effect of Er:YAG laser on the shear bond strength of resin modified glass ionomer (RMGI) to enamel.
MATERIALS AND METHODS
Twenty extracted caries-free human premolars were selected. The teeth were embedded in acrylic resin. The buccal surfaces of each sample were ground to plane enamel with carbonated disc. The teeth were randomly divided in two groups. In the first group, the surfaces were treated by Er:YAG laser (350mJ/10Hz). The second group was prepared by carbide bur. Fuji IX RMGI was adhered to surfaces of the samples in both groups in rod shape. The shear bond strength of samples was measured by a universal testing machine. The results of the two groups were analyzed by T- test.
RESULTS
The means and standard deviations of shear bond strength of the laser-treated group and the bur-treated group were 6.75 ± 1.99 and 4.41 ± 1.62 Mpa, respectively. There is significant difference in the shear bond strength of RMGI between the two groups (P-value=0.01).
CONCLUSION
The laser group showed better results. Er:YAG laser can be an alternative technology in restorative dentistry.
目的
本研究旨在评估铒激光对树脂改性玻璃离子水门汀（RMGI）与牙釉质之间剪切粘结强度的影响。
材料与方法
选取20颗拔除的无龋人类前磨牙。将牙齿嵌入丙烯酸树脂中。用碳化盘将每个样本的颊面研磨至平面牙釉质。将牙齿随机分为两组。第一组，表面用铒激光（350mJ/10Hz）处理。第二组用硬质合金车针制备。两组样本表面均以棒状形式粘结富士IX RMGI。用万能试验机测量样本的剪切粘结强度。两组结果采用T检验进行分析。
结果
激光处理组和车针处理组的剪切粘结强度平均值及标准差分别为6.75±1.99和4.41±1.62MPa。两组间RMGI的剪切粘结强度有显著差异（P值=0.01）。
结论
激光组显示出更好的结果。铒激光可成为修复牙科中的一种替代技术。
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