中国实用口腔科杂志

中国实用口腔科杂志 ›› 2011, Vol. 4 ›› Issue (01): 36-38.

• 论著 • 上一篇    下一篇

Er：YAG激光和酸蚀作用于牙釉质表面后剪切强度的比较研究

  

  1. 山西医科大学口腔医院， 太原  030001
  • 收稿日期:2010-10-08 修回日期:2010-11-29 出版日期:2011-01-15 发布日期:2011-02-22

  • Received:2010-10-08 Revised:2010-11-29 Online:2011-01-15 Published:2011-02-22

摘要：

目的    探讨Er：YAG激光照射对牙釉质表面的蚀刻效果，并与酸蚀效果进行比较研究。方法    2010年4—7月在山西医科大学选取40颗完整的人离体双尖牙，随机分为4组（每组各10颗牙），即酸蚀组（35％的磷酸），Er：YAG激光组（5 Hz，100 mJ，0.5 W），酸蚀加Er：YAG激光组，Er：YAG激光加酸蚀组。分别在牙釉质表面进行蚀刻处理，黏结光固化复合树脂，进行剪切强度测试。结果    酸蚀加Er：YAG激光组的剪切强度值最高［（16.0±4.2 ）MPa］，与其他组比较差异有统计学意义（P < 0.05）；Er：YAG激光加酸蚀组的剪切强度值最低［（7.1±2.9）MPa］，与其他组比较差异有统计学意义（P < 0.05）；酸蚀组剪切强度值［（11.3± 5.7 ）MPa］与Er：YAG激光组的剪切强度值［（10.3±4.6 ）Mpa］居中，二者相比较差异无统计学意义（P > 0.05）。结论    Er：YAG激光蚀刻可达到类似酸蚀的剪切强度，酸蚀后再用Er：YAG激光照射可在一定程度上提高剪切强度。

关键词: Er：YAG激光, 酸蚀, 剪切强度

Abstract:

Objective    To study the etching effect of enamel surface irradiated by Er：YAG laser，and compare it with the effect of acid etching. Methods    A total of 40 complete isolated human premolars were chosen and were randomly divided into four groups of 10 teeth each at Shanxi Medical University from April 2010 to July 2010. Acid group （35% phosphoric acid），Er：YAG laser group （5Hz，100mJ，0.5W）， acid etching+ Er：YAG laser group， Er：YAG laser+acid etching group. Respectively conduct the etching treatment on enamel surface， light-cured composite resin bonding and the shear strength test. Results    Acid+Er：YAG laser group got the highest shear strength value （16.0±4.2）MPa， compared with other groups the difference was statistically significant （P < 0.05）； Er：YAG laser+acid group got the lowest shear strength value［（7.1±2.9 ）MPa］， compared with other groups the difference was statistically significant （P < 0.05）；the value of the shear strength of acid group［（11.3±5.7）MPa］ and the Er：YAG laser group［（10.3±4.6）MPa］ were in middle，which had similar results，and the two had no statistically significant difference by comparison（P > 0.05）. Conclusion    Er：YAG laser etching can achieve similar shear strength to acid；acid etching with Er：YAG laser irradiation can improve the shear strength to some extent.

Key words: Er：YAG laser； acid etching； shear strength