Weibrich G, Wahlmann U, Kunkel M, Reichert T, Wagner W
Klinik für Mund-, Kiefer- und Gesichtschirurgie, Mainz.
Mund Kiefer Gesichtschir. 1999 Jul;3(4):200-4. doi: 10.1007/s100060050130.
Laser systems are frequently used in dentistry. New laser scanner technologies are promising more homogeneous ablation of pathological ablations of the skin and mucosa. The theoretical advantages of these systems have not yet been sufficiently evaluated by histological findings. For this reason, we compared two laser scanners with different scanning patterns in this study (Silktouch and Swiftlase, by Sharplan, Germany).
In this animal study (79 male Osborn-Mendel rats), skin defects of 3-mm diameter were lasered on to the backs of the animals, one for each method mentioned above (defocused laser, Swiftlase, and Silktouch). The histological investigations were conducted, depending on the time after surgery (9 h, 1, 2, 3, 4, 5, 6, 7, 9, 11, or 13 days). On the clinical site, we evaluated the visible ablation rate, homogeneity and morphology of the wound surface and the degree of carbonization. In the histomorphological investigations, we determined the degree of thermal damage as well as the morphology of the necrotic area and reepithelization pattern of the surface.
The Silktouch scanner clinically showed a homogeneous ablation rate with less carbonization than the Swiftlase scanner. In the histological specimen, this correlated with an increase in the tissue ablation rate and decreasing thermal damage to the surrounding tissue. Especially in the early wound-healing period, there was a more rapid reepithelization after the use of the Silktouch scanner. These differences could not be evaluated in the later wound-healing period. Compared to the defocused laser ablation, both scanning systems seem to have benefits within these parameters.
The results of this study seem to show a diminished perifocal damage and reduced clinical postoperative morbidity achieved by using laser scanning systems. Compared to the Swiftlase laser, the Silktouch seems to deliver better results.
激光系统在牙科中经常使用。新的激光扫描技术有望更均匀地消融皮肤和黏膜的病理性病变。这些系统的理论优势尚未通过组织学研究得到充分评估。因此，在本研究中我们比较了两种具有不同扫描模式的激光扫描仪（德国Sharplan公司生产的Silktouch和Swiftlase）。
在这项动物研究中（79只雄性奥斯本-孟德尔大鼠），在动物背部进行直径3毫米的皮肤缺损激光治疗，每种上述方法（散焦激光、Swiftlase和Silktouch）各进行一次。根据术后时间（9小时、1、2、3、4、5、6、7、9、11或13天）进行组织学研究。在临床方面，我们评估了可见的消融率、创面的均匀性和形态以及碳化程度。在组织形态学研究中，我们确定了热损伤程度以及坏死区域的形态和表面再上皮化模式。
在临床上，Silktouch扫描仪显示出均匀的消融率，碳化程度低于Swiftlase扫描仪。在组织学标本中，这与组织消融率的增加和对周围组织热损伤的减少相关。特别是在伤口愈合早期，使用Silktouch扫描仪后再上皮化更快。在伤口愈合后期无法评估这些差异。与散焦激光消融相比，两种扫描系统在这些参数范围内似乎都有优势。
本研究结果似乎表明，使用激光扫描系统可减少病灶周围损伤并降低临床术后发病率。与Swiftlase激光相比，Silktouch似乎能提供更好的结果。
