中国实用口腔科杂志

中国实用口腔科杂志

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声波手机与机用镍钛器械根管预备过程中根尖冲洗液及碎屑溢出比较研究

刘昕阳，詹福良，王兴勃   

  1. 中国医科大学口腔医学院·附属口腔医院牙体牙髓病科，沈阳  110002
  • 出版日期:2015-07-15 发布日期:2015-07-22

  • Online:2015-07-15 Published:2015-07-22

摘要：

评价机用镍钛器械与声波手机根管预备过程中冲洗液及碎屑溢出根尖情况。 方法    选取2012年10月至2014年1月在中国医科大学附属口腔医院口腔外科门诊因正畸治疗需要或牙周炎症拔除的单根管离体牙（长度与弯曲度相近）40颗作为研究样本，随机分为ProTaper组（使用机用ProTaper镍钛锉进行根管预备）和Sonic handpiece组（使用MM1500声波手机及其配套的Rispisonic和Shaper锉进行根管预备），并将离体牙安装到碎屑及液体收集装置。在根管预备过程中每换用一号器械时，用1 mL次氯酸钠溶液进行根管冲洗，用EP管收集根尖溢出冲洗液及碎屑，称重；恒温箱内干燥5 d后再次称重。比较两组根尖冲洗液及碎屑溢出情况。 结果    根尖冲洗液溢出量的中位数：ProTaper组为116.24 mg，Sonic handpiece组为13.76 mg，两组差异有统计学意义（P < 0.05）。根尖碎屑溢出量的中位数：ProTaper组为4.87 mg，Sonic handpiece组为0.63 mg，两组差异有统计学意义（P < 0.05）。结论    使用声波手机在根管预备时产生的根尖冲洗液及碎屑溢出均明显少于使用机用镍钛器械；声波手机具有较好的临床应用前景。

关键词: 碎屑溢出, 冲洗液溢出, 根管预备, 根管冲洗

Abstract:

Objective    To evaluate and compare the amount of debris and irrigant extrusion quantitatively by using rotary nickel-titanium （Ni-Ti） instrument and sonic handpiece in root canal preparation. Methods    Forty freshly extracted human teeth were selected，which were with single canals（having similar canal length and curvature）due to orthodontics therapy and periodontitis in Department of Oral and Maxillofacial Surgery of China Medical University Stomatology Hospital during October 2012 to January 2014. They were separated into two groups based on Ni-Ti instruments ProTaper and sonic handpiece and mounted in a debris collection apparatus. After each instrument change，1 mL of NaClO was used as the irrigant and the amount of irrigant extruded was measured by EP tube. The EP tube was weighed using an electronic microbalance to determine its weight. After drying in an incubator for five days，the EP tube was weighed again. Compare the amount of debris and irrigant extrusion quantitatively. Results    The median of the amount of irrigant：in the group of ProTaper it was 116.24 mg；in the group of sonic handpiece it was 13.76 mg. The rotary Ni-Ti instrumentation techniques extruded significantly more irrigant than sonic handpiece（P < 0.05）. The median of the amount of debris：in the group of ProTaper it was 4.87 mg；in the group of sonic handpiece it was 0.63 mg. The rotary Ni-Ti instrumentation techniques extruded significantly more debris than sonic handpiece（P < 0.05）. Conclusion    The sonic handpiece extrudes significantly less irrigant and debris than the rotary Ni-Ti instrumentation techniques. It has a good clinical application prospects.

Key words: debris extrusion, irrigant extrusion, root canal preparation, root canal irrigation