Healing responses to grafting of combined collagen-decalcified bone in periodontal defects in dogs.

The feasibility of a new combined collagen gel-autolysed antigen-extracted allogeneic bone implant was tested. Its effect on gaining new attachment in surgically created defects in four dogs was evaluated over 24 weeks. As controls, sites receiving implants of the bone implant alone, nonimplanted and untreated defects were also evaluated. The collagen gel encouraged ingrowth of regenerative tissue-fibroblasts in the early stages of wound healing while the allogeneic bone induced new bone formation. The graft materials were bicompatible, technically manageable and clinically effective. From the present preliminary study, it was evident that the combined autolysed antigen-extracted allogeneic bone-collagen gel implant may offer advantages over the present implant materials and techniques currently used in the treatment of periodontal intrabony defects.