Alexander Robert, Xie John, Fried Daniel
Department of Growth and Development, University of California, San Francisco, California 94143, USA.
Lasers Surg Med. 2002;30(3):240-5. doi: 10.1002/lsm.10018.
Conventional methods of residual composite removal after the debonding of orthodontic brackets involve the use of abrasives that damage the underlying enamel. The objective of this study was to demonstrate that 355-nm laser pulses with a pulse width of 10 ns are well suited for the removal of composite through selective laser ablation.
STUDY DESIGN/MATERIALS AND METHODS: The residual composite remaining on the surface of extracted human third molars and bovine incisors was removed using multiple laser pulses from the third harmonic (355-nm) of a Q-switched Nd:YAG laser.
There is selective ablation of composite from the enamel surface without any discernable damage to the underlying enamel.
This study demonstrates that 355-nm, 10 ns laser pulses can be used for the selective ablation of dental composite without thermal or mechanical damage to the underlying enamel.
正畸托槽脱粘后去除残留复合材料的传统方法需要使用磨料，这会损伤下方的牙釉质。本研究的目的是证明脉宽为10纳秒的355纳米激光脉冲非常适合通过选择性激光烧蚀去除复合材料。
研究设计/材料与方法：使用调Q Nd:YAG激光的三次谐波（355纳米）发出的多个激光脉冲，去除拔除的人类第三磨牙和牛切牙表面残留的复合材料。
复合材料从牙釉质表面被选择性烧蚀，下方牙釉质未出现任何可察觉的损伤。
本研究表明，355纳米、10纳秒的激光脉冲可用于选择性烧蚀牙科复合材料，而不会对下方牙釉质造成热损伤或机械损伤。
