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In view of growing interest in natural treatments, clays would appear to be a good alternative for speeding up the healing process during the treatment of wounds. Of the various clays, palygorskite, a clay from the Brazilian State of Piauí, composed of silicon and aluminum, has shown itself to be pharmaceutically useful as a healing agent. The aim of this article is to evaluate the effect on the healing of wounds of Piauí palygorskite, both in its natural state and when organophilic, by way of comparative analysis of macroscopic and histological tests on skin wounds in adult male and female two-month-old Wistar rats. To this end, a circular trichotomy of the dorsal cornus of the rats was carried out to confirm the effects of treatments involving 0.9% saline solution, collagenase, natural palygorskite, organophilic palygorskite with cetyltrimethylammonium chloride, and organophilic palygorskite with alkyldimethylbenzylammonium chloride. The testing of all the clays involved microbiological evaluation using the depth of plaque and surface striation methods, along with post-treatment macroscopic analysis of skin wounds by way of organoleptics, pachymetry and histological analysis. Microbiological evaluation revealed the need for sterilization of the clay prior to incorporation in the pharmaceutical form. Macroscopic analysis suggests that healing of the wounded area occurred, and histological analysis showed the beneficial effect of the topical use of clay material. Our data suggest that palygorskite may be more powerful than other healing agents, although, on completing treatment, all the animals studied showed the same degree of tissue repair

The effect of natural and organophilic palygorskite on skin wound healing in rats