发光二极管光固化灯和普通卤光灯对离体牙树脂固化微渗漏影响的研究  

Effect of Light-emitting Diode Curing Light and Halogen Light on Microleakage of Extracted Teeth

作　　者：郭斌[1] 王青青[1] 阙克华[1] 谢思静[1] 郝玉庆[1] 杨帆[1] 刘静[1] 

机构地区：[1]四川大学华西口腔医学院口腔生物医学工程教育部重点实验室,成都610041

出　　处：《四川大学学报（医学版）》2006年第6期947-950,共4页Journal of Sichuan University(Medical Sciences)

摘　　要：目的探讨牙科发光二极管光固化灯对离体牙备洞树脂充填固化后的边缘微渗漏的影响。方法离体磨牙73颗,随机分为实验组(MORITATMPENCURE,38颗牙)和对照组(3MTMESPETMEliparTM2500,35颗牙),制备标准类洞,隔湿、消毒,干燥后用可乐丽菲露AP-X复合树脂充填,用上述两种光源的固化灯固化,打磨抛光。经冷热循环处理后进行染色、剖开,用体视显微镜定量和扫描电镜定性观察并拍照。结果体视显微镜下实验组和对照组中没有产生微渗漏的牙齿均占大多数,而重度微渗漏均极少,两者均有较好的边缘封闭效果,差异无统计学意义,扫描电镜提示实验组边缘密合度要好于对照组。结论发光二极管光固化灯和普通卤光灯一样,都可以较好地固化可乐丽菲露AP-X复合树脂,而发光二极管光固化灯可能有更好的降低微渗漏的能力。Objective To evaluate the effect of light-emitting diode （LED） curing light and Halogen dental curing light on the microleakage of Clearfil AP-X composite restorations and to provide evidence for clinical use of LED curing light. Methods Class V cavities were prepared in 73 freshly extracted teeth. The teeth were randomly divided into two groups being exposed to light-emitting diode curing light MORITA^TM PENCURE and halogen light 3M^TM ESPE^TM Elipar^TM 2500 respectively, and then treated with thermocycling （500 cycles, 5-55 ℃）, section and dyeing. The amounts of dye infiltration and marginal seal were examined by stereomicroscope and scanning electron microscope （SEM） respectively. Results No significant differences were found in the amount of dye infiltration shown in the stereo-photomicrograph between the two groups. However, the SEM revealed better marginal seals of those teeth exposed to LED curing light. Conclusion The LED curing light may be able to achieve the same or better effect on reducing microleakage compared with the Halogen dental curing light. Further studies are needed.

关 键 词：普通卤光灯 发光二极管光固化灯 边缘微渗漏 

分 类 号：R783[医药卫生—口腔医学]