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PubMed1980

[Studies on laser surgery of erosio portionis (author's transl)].

Seventy cases of erosio portionis were treated by the carbon dioxide laser beam and all cases were cured by the 6th week. The healing process was studied histologically and cytologically, and then therapeutic procedure was standardized. Histologically, the majority of lamina propria was vaporized by the laser beam. Below the vaporized surface area, a very superficial necrotic tissue could be seen. But the zone of necrosis was gradually thickened by stromal ischemic changes and the necrotic tissue was exfoliated by the 3rd week. After a complete removal of this lamina propria, a granulation tissue was formed and then the secondary stroma could be found. On the granulation tissue, reserve cell hyperplasia and consequently squamous metaplasia could be found in the 1st-4th week. Then, by the 6th week, normal squamous epithelium could be seen. Cytologically, the nuclei and cytoplasm of columnar epithelial cells were greatly elongated and thin immediately after laser surgery. Tissue repair cells and metaplastic cells were found 1st-4th week after laser surgery. For curing of erosio portionis, lamina propria must be removed by the lack of 3-4 mm peripheral and 6-7 mm central tissues forming a funnel shaped.

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