摘要
目的 :通过研究脉冲Nd :YAG激光蚀刻 面窝沟后窝沟封闭剂的渗透性和密合性 ,探讨激光蚀刻在窝沟封闭中的应用价值。方法 :将 4 2颗离体前磨牙随机分为 6组 ,激光能量密度 (energydensity ,ED) 5 0J/cm2 组 ;激光ED 10 0J/cm2 组 ;激光ED 2 0 0J/cm2 组 ;激光ED 5 0 0J/cm2 组 ;激光ED 10 0 0J/cm2 组 ;酸蚀组。每组 7颗牙齿。各激光组分别根据各自的ED进行照射 ,酸蚀组用 35 %的磷酸蚀刻 ,然后进行窝沟封闭 ,6组间两两比较其渗透性和密合性。结果 :10 0 0J/cm2 组的宏观渗透性最好 ,与5 0 0J/cm2组比较无差别 (P >0 .0 5 ) ,与其它四组比较有显著性差异 (P <0 .0 5 ) ,优于其它四组。酸蚀组密合性最好 ,与 5 0 0J/cm2 组、10 0 0J/cm2 组无差别 (P >0 .0 5 ) ,与其它三组比较有显著性差异 ,明显优于其它三组 (P <0 .0 1)。结论
Objective: Using an in vitro study of the penetration and adaptation of pit and fissure sealant after pulse Nd:YAG laser etching the pits and fissures in occlusal surface of human premolars , to explore the utilization of laser etching in pit and fissure sealing. Methods: Forty-two normal premolars extracted for orthodontic reasons were used and random separated in six groups. Group 1 ~5 were etched with pulse Nd:YAG laser, energy density were set as 50J/cm 2?100 J/cm 2?200 J/cm 2?500 J/cm 2 and 1000 J/cm 2 separately (n=7 per group). Group 6 was etched with 35% phosphoric acid conventionally (n=7). Then sealed the pits and fissures. Compared the penetration and adaptation of pit and fissure sealant each other in the 6 groups. Results: Macro-penetration of sealant in 1000J/cm 2 group is the best, indiscriminating to 500J/cm 2 group(P>0.05), superior to the other four groups(P<0.05). Adaptation of sealant in acid etching group is the best, indiscriminating to 500J/cm 2 group and 1000J/cm 2 group(P>0.05), superior to the other three groups(P<0.01). Conclusion: Laser etching combined with acid etching properly can improve the penetration and adaptation of pit and fissure sealant sufficiently.
出处
《河北医学》
CAS
2001年第9期769-773,共5页
Hebei Medicine
