[Madrepore as a bone filler]

The authors studied the behaviour of the porite type coral which has been previously implanted in man in order to get a reparation of osseous and parodontal defects. The histomorfological exam (at the optical microscope, SEM and X-Ray microscope) of a non decalcified bioptic piece, which had been obtained with an appropriate instrument, shows a deposition of neoformed bone around the coral. Six months after the implantation the tissue was stable without any osteoclasts in activity; even the implanted coral grains had not been attached by them. The Authors agree with most of the statements made by Souyris et Al., but they do not believe in the total substitution of the coral with the bone, at least not in short terms: therefore further scientific works will be necessary to clear this point.