analagous to that during embryogenesis; and they develop in the sup- 

 portive connective tissue of ameloblastomas. 



Sometimes it appears that oxytalan fibers are more résistant to the 

 degradative influences of periodontal disease than is collagen since 

 they are sometimes présent when the immediately surrounding collagen 

 has been destroyed. However, they are also eventually destroyed. Many 

 new oxytalan fibers appear to develop immediately inferior to the cells 

 of the epithelialattachment as it proliférâtes apically with the progression 

 of periodontal disease. They also develop in the new repairative tissue 

 of the periodontal membrane conséquent to periodontal disease. 



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