科研之友
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摘要
the use of laser neodymium-yttrium-aluminium-garnet (nd-yag) as an auxiliary tool on rejuvenation provided a refining of the traditional technique. this laser procedure show satisfactory results with technical improvement and postoperatory recovery. objectives: the aim of this study is to show the histological and morphometrical changes found in human eyelid tissue after the use of laser nd-yag and its comparision to the normal structure. material and methods: nine female patients underwent laser nd-yag application on their right eyelid. the left eyelid was taken by control-tissue, free of any kind of procedure. it was made many applications of the laser and on the last day, it was made a bilateral biopsy. the morphometrical criteria appraised were: epidermal denseness measure, subepidermal area free of injury, colagen degeneration and total dermal density. results: in those areas whose underwent laser the epidermal measure was of 33,53 micrometers (米m) and on the normal tissue, was of 29.61米m (p = 0.1099). the subepidermal measure was, on average, of 40.93米m on right side and of 36.27米m on left side (p = 0.1373). the colagen degeneration measure on the right side was of 293.54米m and on the left side was of 292.22米m (p = 0.4835). on the procedure site, the total dermal measure was of 681,48米m and on the free site, it was of 664.14米m (p = 0.3492). discussion and conclusions: despite the clinical changes observed after laser nd-yag therapy, there were neither histological nor morphometrical significative changes.
