[Experimental investigations on cartilage regeneration from perichondrium]

Cartilage regeneration was histologically evaluated in the pedicle thyroid perichondrial flaps bridging between the thyroid and the cricoid of 13 dogs. The result showed that the new cartilage presented mainly at the part of the pedicle end of the flap but disappeared gradually at middle part of the flap, and was replaced gradually by fibrosis from the pedicle end to the free end of the flap. It seemed that the perichondrial flap processed potential but limited capability of cartilage regeneration.