Comparative study on gingival retraction using mechanochemical procedure and pulsed Nd = YAG laser irradiation.

The aim of the present study was to study the tissue reaction and gingival healing in pulsed laser gingival retraction in comparison with chemico-mechanical gingival retraction technique. This work was applied on six patients recommended for orthodontic extraction of first premolars upper and lower. The patients were divided into three groups (two patients each). -One group with laser tissue retraction. -Another group with ferric sulphate (13.3%). -Third group with aluminium chloride (25%). The present histologic findings revealed that with the application of pulsed Nd: YAG laser the gingival tissues showed faster healing with less hemorrhage and less inflammatory reaction in comparison with the other two groups. In conclusion it was evident that pulsed laser is a surgical device increasingly important to dentistry. The present study can support with the clinical application of laser in gingival retraction as a simple convenient, painless method.