[Bone regeneration after filling of extensive cysts by means of bone collagen type 1].

It could be demonstrated by experimental studies on dogs that demineralized bone and bone products have a good osteogenetic potential which gives them a superior rating over artificial materials as replacement of autogenous bone transplants. The results of a prospective clinical study on 52 patients with 56 large mandibular or maxillary cysts are presented showing that bone collagen matrix type I is a good product for the filling of bone defects. Full reossification of a cyst was reaches as early as 8 months postoperatively in 20 cases. 32 defects had become substantially smaller. These results are discussed and compared to other methods mentioned in the literature.