Department of Mechanical Engineering of National Chung Cheng University, Chia-Yi, 62100, Taiwan.
J Dent Res. 2013 Jul;92(7):655-60. doi: 10.1177/0022034513488392. Epub 2013 May 6.
Topical fluoride treatment prevents dental caries. However, the resulting calcium-fluoride-like deposits are soft and have poor wear resistance; therefore, frequent treatment is required. Lasers quickly heat surfaces and can be made portable and suitable for oral remedies. We examined the morphology, nanohardness, elastic modulus, nanowear, and fluoride uptake of fluoride-treated enamel followed by CO2 laser irradiation for 5 and 10 sec, respectively. We found that laser treatments significantly increased the mechanical properties of the calcium-fluoride-like deposits. The wear resistance of the calcium-fluoride-like deposits improved about 34% after laser irradiation for 5 sec and about 40% following irradiation for 10 sec. We also found that laser treatments increased fluoride uptake by at least 23%. Overall, laser treatment significantly improved fluoride incorporation into dental tissue and the wear resistance of the protective calcium-fluoride layer.
局部用氟化物治疗可预防龋齿。然而，由此产生的类似氟化钙的沉积物质地柔软，耐磨性差；因此，需要频繁治疗。激光可以迅速加热表面，并且可以制成便携式，适用于口腔治疗。我们研究了氟化物处理后的牙釉质的形态、纳米硬度、弹性模量、纳米磨损和氟化物摄取，然后分别用 CO2 激光照射 5 和 10 秒。我们发现激光处理显著提高了类似氟化钙沉积物的机械性能。激光照射 5 秒后，类似氟化钙沉积物的耐磨性提高了约 34%，照射 10 秒后提高了约 40%。我们还发现激光处理至少增加了 23%的氟摄取。总的来说，激光处理显著提高了氟化物在牙体组织中的结合和保护性氟化钙层的耐磨性。
