Department of Radiology and Medical Physics, School of Medicine and Dentistry, University of Granada, Granada, 18071, Spain.
Lasers Med Sci. 2011 May;26(3):317-24. doi: 10.1007/s10103-010-0784-y. Epub 2010 Apr 27.
Various authors have reported more effective fluoridation from the use of lasers combined with topical fluoride than from conventional topical fluoridation. Besides the beneficial effect of lasers in reducing the acid solubility of an enamel surface, they can also increase the uptake of fluoride. The study objectives were to compare the action of CO(2) and GaAlAs diode lasers on dental enamel and their effects on pulp temperature and enamel fluoride uptake. Different groups of selected enamel surfaces were treated with amine fluoride and irradiated with CO(2) laser at an energy power of 1 or 2 W or with diode laser at 5 or 7 W for 15 s each and compared to enamel surfaces without treatment or topical fluoridated. Samples were examined by means of environmental scanning electron microscopy (ESEM). Surfaces of all enamel samples were then acid-etched, measuring the amount of fluoride deposited on the enamel by using a selective ion electrode. Other enamel surfaces selected under the same conditions were irradiated as described above, measuring the increase in pulp temperature with a thermocouple wire. Fluorination with CO(2) laser at 1 W and diode laser at 7 W produced a significantly greater fluoride uptake on enamel (89 ± 18 mg/l) and (77 ± 17 mg/l) versus topical fluoridation alone (58 ± 7 mg/l) and no treatment (20 ± 1 mg/l). Diode laser at 5 W produced a lesser alteration of the enamel surface compared to CO(2) laser at 1 W, but greater pulp safety was provided by CO(2) laser (ΔT° 1.60° ± 0.5) than by diode laser (ΔT° 3.16° ± 0.6). Diode laser at 7 W and CO(2) laser at 2 W both caused alterations on enamel surfaces, but great pulp safety was again obtained with CO(2) (ΔT° 4.44° ± 0.60) than with diode (ΔT° 5.25° ± 0.55). Our study demonstrates that CO(2) and diode laser irradiation of the enamel surface can both increase fluoride uptake; however, laser energy parameters must be carefully controlled in order to limit increases in pulpal temperature and alterations to the enamel surface.
各种作者已经报告了使用激光联合局部氟化物比传统局部氟化物更有效地氟化物。除了激光在降低牙釉质表面酸溶性方面的有益作用外，它们还可以增加氟化物的摄取。本研究的目的是比较 CO(2)和 GaAlAs 二极管激光对牙釉质的作用及其对牙髓温度和牙釉质氟摄取的影响。选择的不同牙釉质表面组用胺氟化物处理，并用 CO(2)激光以 1 或 2 W 的能量功率照射 15 秒，或用二极管激光以 5 或 7 W 的能量功率照射 15 秒，然后与未经处理或局部氟化的牙釉质表面进行比较。通过环境扫描电子显微镜（ESEM）进行检查。然后用选择性离子电极测量牙釉质上沉积的氟化物量，对所有牙釉质样品的表面进行酸蚀。在相同条件下选择的其他牙釉质表面如上所述进行照射，用热电偶线测量牙髓温度的升高。CO(2)激光 1 W 和二极管激光 7 W 的氟化物处理在牙釉质上产生了显著更高的氟摄取（89±18 mg/l）和（77±17 mg/l），而与单独的局部氟化物处理（58±7 mg/l）和无处理（20±1 mg/l）相比。与 CO(2)激光 1 W 相比，二极管激光 5 W 对牙釉质表面的改变较小，但 CO(2)激光（ΔT°1.60°±0.5）提供的牙髓安全性大于二极管激光（ΔT°3.16°±0.6）。二极管激光 7 W 和 CO(2)激光 2 W 都对牙釉质表面造成了改变，但 CO(2)再次获得了更大的牙髓安全性（ΔT°4.44°±0.60），而二极管（ΔT°5.25°±0.55）。我们的研究表明，CO(2)和二极管激光对牙釉质表面的照射都可以增加氟化物的摄取；然而，必须仔细控制激光能量参数，以限制牙髓温度的升高和牙釉质表面的改变。
