[The histological reaction of cialit preserved hyaline and elastic cartilage implanted to replace partially bony wall of the guinea-pig bulla (author's transl)].

Cialit preserved cartilage was used to fill defects of the bulla of porpoises and the histological healing was studied. Hyaline and elastic cartilage are showing an integration without reactions. The cartilage is resorbed consecutively by the recipient and substituted by bone. Whereas the hyaline cartilage shows a complete bony substitute and a small enlargement we can registrate that the elastic cartilage often shows a resorptive tendency with replacement of connective tissue and loss of the shape. The histological results are corresponding to the clinical results when using preserved cartilage in middle ear surgery for restoring the posterior wall.