Histological and histomorphometric evaluation of natural bovine bone substitute with hyaluronate in socket preservation-a report of three cases.

Tooth extraction is physiologically followed by resorption of alveolar bone. Surgical method which aims to minimise this reduction in alveolar bone with a goal to provide enough bone volume for dental implant insertion is called socket preservation. The purpose of this article was to asses clinical, histomorphometric and histological results of socket preservation conducted with natural bovine bone substitute with hyaluronate. Three patients with one or more hopeless teeth in posterior region planned for extraction and implant placement were included in these case reports. After atraumatic extractions, empty sockets were filled with the bovine xenograft with hyaluronate, and then covered with collagen sponge. After 4-7.5 months the samples for biopsy were taken and then implants were inserted. The augmented sites healed uneventfully and without any complications. The histological specimens demonstrated new bone formation and osteoclastic activity around the biomaterial, as well as blood vessels in soft tissue. Histomorphometrically, formation of new bone averaged 24.8% ± 4.7% (mean ± standard deviation) in bone biopsies taken from the center of the augmented site, while the residual biomaterial averaged 52.7% ± 4.9% and the soft tissue averaged 22.6% ± 4%. In conclusion, the natural bovine bone substitute with hyaluronate demonstrated excellent osteoconductive potential for bone regeneration.