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首页> 外文期刊>Key Engineering Materials >Occlusion Effect of Dentinal Tubules of the Dentifrice containing Sodium Metasilicate
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Occlusion Effect of Dentinal Tubules of the Dentifrice containing Sodium Metasilicate

机译：含有偏硅酸钠的洁牙剂的牙本质小管的闭塞作用

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摘要

Exposed dentine with patent tubules allows the movement of tubule fluid leading to dentine sensitivity. Occlusion of patent dentinal tubules effectively reduces the state of dentine hypersensitivity. Strontium chloride (SrCl_2) has been well known as a component of desensitizing dentifrice. Recently, new dentifrice containing sodium metasilicate was on the market for desensitizing dentifrice. The aim of this in vitro study was to compare the occlusion effect of dentinal tubule between the sodium metasilicate and the existing desensitizing dentifrices. Sixty-four human dentine specimens were embedded into a Teflon mold and were grinded with the use of silicone carbide papers to expose the surface of dentin. The dentin surface was etched with 37% phosphoric acid for 60 seconds and was treated with ultrasonic washing for 1 hour. The dentifrices used in the study are classified into four groups: G1-dentifrice containing Sodium metasilicate, G2-dentifrice containing Strontium chloride, G3-dentifrice containing Hydroxyapatite and G4-BSI reference dentifrice (control group). Toothpaste slurries were prepared as 20 gram of toothpaste in 80 ml of distilled water. Thirty-two specimens were brushed with the toothpaste slurries using V8 Cross Brushing Machine. Tooth-brushing was performed 5,000 times using a back-and-forth stroke. The pictures of the sizes of dentinal tubules were taken by scanning electron microscopy (x3000) and changes of tubule sizes were analyzed by digital analysis. The results showed that the difference of tubule size in descending order: G1-3.30±1.80, G2-2.82±1.73, G3-1.49±1.14, G4-1.04±0.94. The dentifrice containing Sodium metasilicate (22.5%) showed the highest dentinal tubule occlusion. Moreover, the dentifrice containing Sodium metasilicate statistically significantly increased occlusion of dentinal tubule as compared to BSI reference dentifrice (p < 0.05). Thus, new desensitizing dentifrice containing sodium metasilicate was more effective than existing desensitizing dentifrice on occlusion of dentin tubules.
机译：暴露的具有专利小管的牙本质允许小管液移动，从而导致牙本质敏感。牙本质小管的阻塞有效地降低了牙本质过敏的状态。众所周知，氯化锶（SrCl_2）是使洁齿剂脱敏的成分。近来，用于使洁牙剂脱敏的新的含有偏硅酸钠的洁牙剂在市场上。这项体外研究的目的是比较牙膏小管在偏硅酸钠和现有的脱敏牙膏之间的咬合效果。将六十四个人类牙质标本包埋在特氟隆模具中，并使用碳化硅纸研磨以暴露牙本质表面。用37％磷酸蚀刻牙本质表面60秒，并用超声波清洗1小时。研究中使用的洁齿剂分为四组：含偏硅酸钠的G1-牙粉，含氯化锶的G2-牙粉，含羟基磷灰石的G3-牙粉和G4-BSI参考牙粉（对照组）。将牙膏浆料制成80毫升蒸馏水中的20克牙膏。使用V8十字刷机将32个样本用牙膏浆料刷洗。来回刷牙进行了5,000次。通过扫描电子显微镜（x3000）拍摄牙本质小管尺寸的照片，并通过数字分析分析小管尺寸的变化。结果表明，肾小管大小的下降顺序为：G1-3.30±1.80，G2-2.82±1.73，G3-1.49±1.14，G4-1.04±0.94。含有偏硅酸钠（22.5％）的洁牙剂显示出最高的牙本质小管阻塞。此外，与BSI参考洁牙剂相比，含偏硅酸钠的洁牙剂在统计学上显着增加了牙本质小管的阻塞（p <0.05）。因此，在封闭牙本质小管时，含有偏硅酸钠的新的脱敏洁齿剂比现有的脱敏洁齿剂更有效。

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