中国实用口腔科杂志

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不同釉质黏结剂去除方法对牙面着色影响分析

严 宏,张端强苏杰华   

  1. 福建医科大学附属口腔医院正畸科
  • 收稿日期:2009-07-22 修回日期:2009-08-05 出版日期:2009-09-15 发布日期:2009-09-15

  • Received:2009-07-22 Revised:2009-08-05 Online:2009-09-15 Published:2009-09-15

摘要: 摘要:目的 探讨尖锐刮治器刮除法、弯机+碳钨钻低速磨除法及直机+金刚砂针高速磨除法去除釉质黏结剂对牙面着色的影响。方法 收集2008年10月至2009年2月福建医科大学附属口腔医院正畸科患者因治疗需要而拔除的新鲜双尖牙80颗,将托槽黏结于牙体颊面后再去除。选出所有黏结剂残留在牙面上且黏结剂表面有完整托槽底板压痕的样本54颗,以氯己定+唾液+红茶制备牙外源性着色模型,应用3种不同的釉质黏结剂去除方法,分组去除牙表面残余釉质黏结剂并染色,记录托槽区牙面白色度值并进行统计分析。结果 3种不同的釉质黏结剂去除方法均可致牙面色素沉着,其中以C组(直机+金刚砂针高速磨除法)着色最深、白色度值最小,A组(尖锐刮治器刮除法)次之,而B组(弯机+碳钨钻低速磨除法)着色最浅、白色度值最高,3组间差异有统计学意义(P < 0.05)。结论 弯机+碳钨钻低速磨除法去除釉质黏结剂最有利于减少牙面着色,为最佳去除釉质黏结剂方法。

关键词: 外源性染色, 白色度值, 釉质黏结剂去除

Abstract: Abstract: Objective To compare the effect of three methods of removing orthodontic adhesive on extrinsic dental stain,including mechanical curettage instrument,low speed microbrasion with carbo-wolfram bur and high speed microbasion with diamond bur. Methods Totally 80 premolars freshly extracted for orthodontic reason were collected in the Department of Orthodontics,Affiliated Hospital of Fujian Medical University between Oct. 2008 and Feb. 2009. Brackets were bonded on the labial surface of each tooth and then removed;54 teeth with all adhesive remained and full mark of bracket base were chosen and divided into three groups for experiment. Artificial saliva with black tea and chlorhexidine mouth wash were used to construct extrinsic dental stain model. Orthodontic adhesive was removed by three methods accordingly,then all teeth were stained. The white chroma was recorded for statistical analysis. Results Extrinsic dental stain was found after adhesive removal by all three methods. Group C(high speed microbasion with diamond bur) showed the darkest coloration and lowest white chroma;group A(mechanical curettage instrument) showed medial coloration and white chroma,while B group(low speed microbrasion with carbo-wolfram bur) showed the lightest coloration and highest white chroma. The difference among three groups was of statistical significance(P < 0.05). Conclusion Removing adhesive by low speed microbrasion with carbo-wolfram bur is good for preventing extrinsic dental stain,and it is the best method to remove orthodontic adhesive.

Key words: extrinsic dental stain, white chroma, removal of orthodontic adhesive