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首页> 外文期刊>Operative dentistry >Efficiency of the polymer bur SmartPrep compared with conventional tungsten carbide bud bur in dentin caries excavation.
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Efficiency of the polymer bur SmartPrep compared with conventional tungsten carbide bud bur in dentin caries excavation.

机译：与传统的碳化钨芽钻相比，SmartPrep聚合物钻在牙本质龋中的效率更高。

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SmartPrep is a rotating instrument for dentin caries excavation made from a special polymer. The manufacturer's product information stated that SmartPrep removes carious dentin selectively. This in vitro study compared the efficiency of SmartPrep with conventional tungsten carbide bud burs. Fifty extracted teeth were split in the center of a carious lesion. The 100 specimens were randomly divided into five groups. Five dentists were asked to excavate 10 teeth each: one half with SmartPrep and the corresponding half with conventional bud burs. The time needed for the caries excavation was measured. Subsequently, histological specimens were produced from all cavities and analyzed by light-microscope after Mallory-Azan-staining. The thickness of the remaining caries was measured (< 1 mm or > 1 mm). The time expended was analyzed using the paired t-test. The results were analyzed for the remaining caries and thickness of the carious layer for every tooth, using the non-parametric Wilcoxon test for combinedrandom samples. A binary logistical regression was performed to determine the influence of the three variables (tooth, sections or bur) on the criteria "caries" or "carious layer thickness (> 1 mm)." The average time to excavate a cavity with SmartPrep was 208.1 seconds, and it was 228.32 seconds with conventional bud burs. The difference between the recorded times was not statistically significant (p > 0.05). In 37 of 50 teeth, the number of carious sections was higher in the SmartPrep group than in the bud bur group. In nine teeth, the quantity of carious sections was higher in the bud bur group than in the SmartPrep group. Four teeth showed no difference in the number of carious sections. The results were statistically significantly different (p < 0.001). In 30 teeth, the number of carious sections with a carious layer thicker than 1 mm was higher in the SmartPrep group compared with the bud bur group. In nine teeth, the number of carious sections was higher in the bud bur group than in the SmartPrep group. Eleven teeth showed no difference in thickness of the carious dentin layer. These results were statistically significantly different (p = 0.003). Binary logistical regression showed that only the variable "bur" (bud bur or SmartPrep) influenced the results concerning the criterion "caries" (p < 0.001).
机译：SmartPrep是一种旋转器械，用于由特殊聚合物制成的龋齿龋齿。制造商的产品信息表明，SmartPrep选择性去除龋齿。这项体外研究比较了SmartPrep与传统碳化钨芽针的效率。在龋病中心将五十颗拔出的牙齿分开。将100个标本随机分为5组。要求五名牙医分别挖掘10颗牙齿：其中一半使用SmartPrep，而另一半则使用传统芽针。测量龋齿开挖所需的时间。随后，从所有腔中产生组织学标本，并在Mallory-Azan染色后通过光学显微镜进行分析。测量剩余龋齿的厚度（<1 mm或> 1 mm）。使用配对的t检验分析了花费的时间。使用非参数Wilcoxon检验组合随机样本，分析了每个牙齿的剩余龋齿和龋齿层厚度。进行了二进制逻辑回归分析，以确定三个变量（牙齿，切片或钻头）对标准“龋齿”或“龋齿层厚度（> 1 mm）”的影响。使用SmartPrep挖洞的平均时间为208.1秒，而使用常规芽针的平均时间为228.32秒。记录的时间之间的差异无统计学意义（p> 0.05）。在50颗牙齿中的37颗中，SmartPrep组的龋齿数量高于芽bur组。在9颗牙齿中，芽bur组的龋齿切面数量高于SmartPrep组。四颗牙齿的龋齿数目没有差异。结果在统计学上有显着差异（p <0.001）。与芽bur组相比，SmartPrep组的30颗牙齿中，具有大于1 mm的龋齿层的龋齿切片数量更高。在9颗牙齿中，芽bur组的龋齿数目比SmartPrep组的高。十一颗牙齿的龋牙本质层厚度没有差异。这些结果在统计上有显着差异（p = 0.003）。二元逻辑回归表明，只有变量“ bur”（bud bur或SmartPrep）影响有关标准“龋齿”的结果（p <0.001）。

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