Biomaterials, Biomimetics & Biophotonics Research Group (B3), King's College London Dental Institute, Guy's, King's College and St Thomas' Hospitals, London, UK.
Med Oral Patol Oral Cir Bucal. 2011 Nov 1;16(7):e1022-30. doi: 10.4317/medoral.17397.
The purpose of this study was to evaluate the changes in dentinal permeability (i.e. hydraulic conductance) after prophylactic treatment performed using prophy-powders with air-polishing system or prophy-pastes applied on exposed middle dentine. The changes in dentine morphology were evaluate by SEM.
Several prophylactic pastes or air-polishing powders were tested in this study. Dentine discs from human third molars were used to study the quantitative reduction of the dentine permeability under simulated pulpal pressure (20 cm H₂O). Further specimens were gold-coated and observed with the use of a SEM.
The results of this study showed different reductions of dentin permeability effects based on the type of product employed (i.e. prophylactic paste or air-polishing powders). The use of Sylc bioactive glass and sodium bicarbonate were the most effective in reducing dentine permeability of the specimens etched with the phosphoric. The air-polishing procedures performed with Sylc bioactive glass created a dentine surface devoid of exposed dentinal tubules due to the presence of a compact multilayered smear layer. Colgate Sensitive Pro-Relief and Nupro NU-Solution reduced the dentine permeability up to 69.8% and 66.9% respectively.
Although all the tested products are able to statistically reduce dentine permeability, Sylc bioactive glass is an innovative and effective product suitable for the reducing of the dentine permeability during prophylactic procedures of air-polishing.
本研究旨在评估使用牙菌斑抛光粉和牙菌斑膏对暴露的中层牙本质进行预防性治疗后牙本质通透性（即水力传导率）的变化。通过扫描电镜评估牙本质形态的变化。
本研究测试了几种牙菌斑抛光膏或牙菌斑抛光粉。用人的第三磨牙牙本质片研究模拟牙髓压力（20cmH₂O）下牙本质通透性的定量减少。进一步的样本进行镀金处理，并使用 SEM 进行观察。
本研究结果表明，根据所使用产品的类型（即预防性膏剂或牙菌斑抛光粉），牙本质通透性的降低效果不同。Sylc 生物活性玻璃和碳酸氢钠的使用在降低磷酸蚀刻样本的牙本质通透性方面最为有效。由于存在致密的多层玷污层，使用 Sylc 生物活性玻璃进行的牙菌斑抛光处理会在牙本质表面形成无暴露牙本质小管的状态。高露洁敏感 Pro-Relief 和 Nupro NU-Solution 分别将牙本质通透性降低了 69.8%和 66.9%。
尽管所有测试的产品都能够在统计学上降低牙本质通透性，但 Sylc 生物活性玻璃是一种创新且有效的产品，适用于在牙菌斑抛光预防性治疗中降低牙本质通透性。
