METHODS: The (810 and 980 nm) dual-wavelength diode laser was used at 1.5 W and 2.5 W (CW) power settings, and the (2780 nm) Er, Cr:YSGG laser was used at 2.5 W and 3.5 W (PW) power settings. Both laser systems were used to incise the tissues of freshly dissected sheep tongue pieces to obtain the following histopathological criteria: epithelial tissue changes, connective tissue changes, and lateral thermal damage extent by optical microscopy.
RESULTS: The epithelial and connective tissue damage scores were significantly higher in the dual-wavelength diode laser groups than in the Er, Cr:YSGG laser groups (P<0.001), and there was a significant difference between some groups. The extent of lateral thermal damage was also significantly higher in the diode laser groups than in the Er, Cr: YSGG laser groups (P<0.001), and there was a significant difference between groups. Group 2 (2.5 W) of the diode laser was the highest for all three criteria, while group 3 (2.5 W) of the Er, Cr:YSGG laser was the lowest.
CONCLUSIONS: The Er, Cr:YSGG laser with an output power of 2.5 W is, histologically, the most effective and safest laser for oral soft tissue incision. The dual-wavelength diode laser causes more damage than the Er, Cr:YSGG laser, but it can be used with a low output power and 1 mm safety distance in excisional biopsy.
方法:在1.5W和2.5W(CW)功率设置下使用(810和980nm)双波长二极管激光器,和(2780nm)Er,Cr:YSGG激光器在2.5W和3.5W(PW)功率设置下使用。两种激光系统均用于切开新鲜解剖的绵羊舌片的组织,以获得以下组织病理学标准:上皮组织变化,结缔组织改变,光学显微镜的横向热损伤程度。
结果:双波长二极管激光组的上皮和结缔组织损伤评分明显高于Er,Cr:YSGG激光组(P<0.001),某些组之间存在显着差异。二极管激光器组的横向热损伤程度也明显高于Er,Cr:YSGG激光组(P<0.001),组间有显著差异。二极管激光器的第2组(2.5W)在所有三个标准中都是最高的,而Er的第3组(2.5W),Cr:YSGG激光最低。
结论:Er,Cr:YSGG激光器的输出功率为2.5W,组织学上,最有效和最安全的激光用于口腔软组织切口。双波长二极管激光器比Er造成更多的损坏,Cr:YSGG激光器,但它可以用于低输出功率和1毫米的安全距离切除活检。