Effects of plaque control on the patency of dentinal tubules: An in vivo study in beagle dogs
Effects of plaque control on the patency of dentinal tubules: An in vivo study in beagle dogs
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DOI：
10.1902/jop.2006.050159
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发表时间：
2006-03-01
影响因子：
4.3
通讯作者：
Ebisu, Shigeyuki
中科院分区：
文献类型：
--
作者：
Suge, Toshiyuki;Kawasaki, Akiko;Ebisu, Shigeyuki
背景：本体内研究的目的是利用比格犬的活牙评估牙菌斑控制对牙本质小管通畅的影响。方法：在每只狗的下颌和上颌磨牙的颈部区域用菱形点制备 V 类蛀牙。为了模拟牙本质过敏状态，用50%柠檬酸酸蚀牙齿2分钟，获得开放的牙本质小管。通过每天刷左侧牙齿来实现牙菌斑控制，而右侧牙齿则没有进行牙菌斑控制。 1、2、3周后使用圆柱形金刚石点进行牙本质活检，获取牙本质标本。结果：在牙菌斑对照组中，部分牙本质小管被沉淀物闭塞（Ca/P = 1.49），7后牙本质小管直径从2.42+/-0.33μm（平均SD）减小至1.11+/-0.51μm。尽管大部分牙本质小管仍处于开放状态。相反，在非斑块对照组的牙本质小管中没有观察到沉淀。此外，由于管周和管间牙本质脱矿，牙本质小管的直径从 2.42 +/- 0.33 增加到 2.9 +/- 0.49 μm。结论：牙菌斑控制在减少牙本质小管的通畅方面发挥着关键作用，因此可能促进牙本质过敏的自然修复。
Background: The aim of this in vivo study was to evaluate the effects of plaque control on the patency of dentinal tubules using vital teeth of beagle dogs.Methods: Class V cavities were prepared on the cervical areas of the mandibular and maxillary molars in each dog with a diamond point. To simulate the state of dentinal hypersensitivity, the teeth were etched with 50% citric acid for 2 minutes to obtain patent dentinal tubules. Plaque control was achieved by brushing the left-side teeth every day, whereas no plaque control was performed for the right-side teeth. A dentin biopsy was performed after 1, 2, and 3 weeks using the cylindrical diamond point to obtain dentin specimens.Results: In the plaque control group, some of the dentinal tubules were occluded with precipitate (Ca/P = 1.49), and the diameter of the dentinal tubules decreased from 2.42 +/- 0.33 mu m (mean SD) to 1.11 +/- 0.51 mu m after 7 days, although most of the dentinal tubules remained open. In contrast, no precipitate was observed in the dentinal tubules of the nonplaque control group. Also, the diameter of the dentinal tubules increased from 2.42 +/- 0.33 to 2.9 +/- 0.49 mu m, due to the demineralization of the peritubular and intertubular dentin.Conclusion: Plaque control plays a key role in reducing the patency of dentinal tubules and, therefore, might promote the natural repair of dentinal hypersensitivity.