中国实用口腔科杂志

中国实用口腔科杂志 ›› 2010, Vol. 3 ›› Issue (05): 295-297.

• 论著 • 上一篇    下一篇

LED固化系统应用于乳牙复合体修复研究

  

  1. 1.昆明医学院附属口腔医院口腔预防与儿童口腔科，昆明  650000；2.中山大学附属口腔医院儿童口腔科，广州  510060
  • 收稿日期:2010-03-22 修回日期:2010-04-25 出版日期:2010-05-15 发布日期:2010-06-01

  • Received:2010-03-22 Revised:2010-04-25 Online:2010-05-15 Published:2010-06-01

摘要：

目的    探讨LED固化系统应用于乳牙复合体修复后，对边缘密闭性、操作时间、操作复杂程度的影响。方法    收集2007—2008年中山大学附属口腔医院儿童口腔科拔除的离体乳磨牙97颗，将牙冠制备成牙片，表面制备Ⅰ类洞，共成功制备牙片84片。将制备了洞型的牙片随机分为A、B、C、D4组，每组21个。A组：F2000复合体+Xeno Ⅲ黏结系统+QTH光固化系统；B组：F2000复合体+Xeno Ⅲ黏结系统+ LED光固化系统；C组：Dyract复合体+Xeno Ⅲ黏结系统+QTH光固化系统；D组：Dyract复合体+Xeno Ⅲ黏结系统+LED光固化系统。温度循环法模拟体内状况处理样本后，扫描电镜观察，并行染料渗透实验。单盲法对二维微渗漏情况进行观察。结果    各组二维微渗漏程度的组间差异无统计学意义（P > 0.05）。经扫描电镜观察可见，无论采用何种组合方式，充填材料均密实无裂隙，周边牙体组织完好无裂纹，黏结剂的分布都比较均匀连续。结论    由于LED固化系统具有良好的边缘密闭性、操作时间短和操作便利等突出优点，值得口腔临床推广使用。

关键词: 乳牙, 固化系统, 密闭性, 复合体

Abstract:

Objects    To evaluate the effects on the marginal leaking tightness， treating time and the complexity of treatment made by various Light-curing units applied to the compomer restoration of primary teeth. Methods    Class I cavities were prepared in crowns of human primary molar teeth. Teeth were divided into 4 groups nith 21 in each. Group A was managed with F2000 compomer + Xeno Ⅲ adhesive system + QTH Light-curing units,group B with F2000 compomer + Xeno Ⅲ +LED Light-curing units，group C with Dyract compomer + Xeno Ⅲ +QTH Light-curing units, group D with Dyract compomer + Xeno Ⅲ +LED Light-curing units. After the specimens were thermocycled（500 cycles between 5～55℃ with 15-second dwell time），we used the scanning electron microscope（SEM） to observe the specimens and he experiment of dye infiltration was performed. observe the 2-dimentional microleakage by single blind method. Results    Besides the rapid reducing of  operation time，The groups using LED Light-curing units have the same capability of marginal-sealing as those using QTH Light-curing units （P > 0.05）. Conclusion    The LED Light-curing unit can not only approach marginal-tightness as QTH Light-curing unit， but also reduce operation time and make the treatment more convenient.

Key words: primary tooth；Light-curing unit；marginal leaking tightness；compomer