Grafting in Veterinary Medicine: A Mini Review

Grafting refers to a surgical procedure to move tissue from one site to another on the body, or from another creature, without bringing its own blood supply with it. Instead, a new blood supply grows in after it is placed. There were many types of grafts for reconstruction defec ts in many organs as bone graft , skin graft and tendon gr aft.

The Ultrastructure of Cadaverous Skin after Cryopreservation with Polyethylene Oxide-400

The cryopreservation is the method of selection of long-term skin preservation used for the closure of large wound defects and the only possibility of long preservation of graft skin material in the viable state. For the lowtemperature preservation of human skin was successfully used cryoprotectant Polyethylene oxide -400, which was confirmed by the clinical evaluation during autotransplantation /1/. At the same time many aspects of the influence of low temperatures on the ultrastructural skin components were unclear /2/. The investigation of subcellular elements during step of low-temperature preservation specifies mechanisms of influence on the tissue preservation factors and determine the condition of skin cellular elements /3,4,5/. The aim of this work is to study ultrastructural characteristics of human cadaverous skin during the stages of low-temperature preservation by PEO-400.In this investigation epidermal skin grafts with the thickness of 0.4-0.6 mm were studied in 6 hours after the accidental death divided in 3 series:

The activity of hair follicles in parabiotic rats

Hair growth in the rat occurs in a series of waves, which start ventrally and pass over the flanks to the back (Dry, 1926; Butcher, 1934; Johnson, 1958a). The activity of the hair follicle is cyclic; when the hair has been fully formed there is a period of quiescence during which the dead hair is retained as a ‘club’. The duration of the complete cycle varies with site and age, ranging from 24 to about 100 days (Ebling & Johnson, 1964). When hair follicles are translocated, they continue to maintain the periodicity characteristic of their sites of origin (Ebling & Johnson, 1959). On the other hand, when skin is exchanged between rats of different ages and thus with their hair growth waves out of phase, follicular activity in the graft skin in some circumstances comes into line with the activity of the host (Ebling & Johnson, 1961).