脉冲Nd：YAG激光照射牙本质后对光固化树脂充填体边缘微渗漏的影响  

Effects of Nd:YAG laser radiation on the microleakeage of Durafill

作　　者：马哲[1] 杨冬茹[1] 董福生[1] 武明轩[1] 刘莉[1] 

机构地区：[1]河北医科大学口腔医院,石家庄050017

出　　处：《现代口腔医学杂志》2006年第5期492-494,共3页Journal of Modern Stomatology

摘　　要：目的研究脉冲Nd：YAG激光照射牙本质后对光固化树脂充填体边缘微渗漏的影响,以探讨脉冲Nd：YAG激光在龋病治疗中的临床应用意义。方法选用正畸要求拔除的正常双尖牙30颗,随机分为A,B,C三组,每组10颗,用高速裂钻备洞(洞长、宽为3mm；洞深为2mm),A组为对照组,常规酸蚀树脂充填；B,C两组分别用50mJ,10Hz和100mJ,10Hz的脉冲Nd：YAG激光能量照射窝洞牙本质壁30s后树脂充填,分别用体视显微镜和扫描电镜观察充填体边缘和洞壁结合情况。结果体视显微镜下观察：A组的牙本质洞壁与光固化树脂充填体间染料渗入较多,着色较深；B、C组的牙本质洞壁与光固化树脂充填体间染料渗入较少,着色较浅。扫描电镜下观察：B、C组的牙本质洞壁与光固化树脂充填体间裂隙明显小于未经激光处理的对照组。结论脉冲Nd：YAG激光处理牙本质后进行光固化复合树脂充填,可以减少充填体微渗漏,有利于充填的成功。Objective To evaluate the effects of Nd：YAG laser radiation on the microleakeage of Durafill, and to disscuss the value of Nd： YAG laser in clinic. Methods Thirty extracted human bicuspid teeth were prepared to form cavity（length, 3mm width; 2mm deepth）, and randomly divided into 3 groups. Group A was used as normal control. Ten teeth were etched with 37% phosphoric acid and sealed with Durafill. In group B 10 teeth were lased with the power （50mj, 10Hz,30s） and sealed with Durafill. In group C 10 teeth were lased with the power（ 100m j, 10Hz, 30s） and sealed with Durafill. The microleakeage of Durfill in the 3 groups had been measured by using steroscopic microscope and SEM. Results The data of steroscopic microscope observation： there were deep peneration of coloring matter in group A than that of group B,C （ P 〈 0.01） The data of SEM observation： the cranny of the laser- treated group was smaller than that of the nordaser - treated group. Conclusion The cavity was filled with Durafill after treated with Nd ： YAG laser, the dentin could make more attachment with the filling. Nd：YAG laser could significantly reduced microleakeage of Durafill.

关 键 词：脉冲ND:YAG激光 牙本质 微渗漏 

分 类 号：R781.05[医药卫生—口腔医学]