RESUMO
<p><b>OBJECTIVE</b>This study was conducted to counter the osteogenesis effects of processed autogenous tooth bone and xenogeneic bovine bone following tooth extraction and to provide an experimental basis for clinical applications.</p><p><b>METHODS</b>Central incisors were extracted with general anesthesia on both sides of a maxillary arch in 12 rabbits, which were randomly divided into three groups, thereby containing four rabbits in each group. Three rabbits were assigned to the experimental groups and one was for the control group. In the experimental groups, the xenogeneic bovine bone was applied to the left incisor socket, whereas the processed autogenous tooth bone was applied to the right incisor socket. The blank control group only extracted the teeth and did not implant any bone powder. The three groups died after 4, 8, and 12 weeks, respectively. A mineralization degree of new bone tissues was observed by fluorescence staining and the formation of a new bone was observed by histology.</p><p><b>RESULTS</b>The sedimentary mineralization rate was greater in the processed autogenous tooth bone than in the xenogeneic bovine bone (P<0.05). The trabecular bone of the xenogeneic bovine bone was sparse and slender. The left sockets, which were filled with the xenogeneic bovine bone, had more woven and less lamellar bones than the right sockets, which were filled with the processed autogenous tooth bone.</p><p><b>CONCLUSIONS</b>The processed autogenous tooth bone offers more advantages as a bone-grafting material than the xenogeneic bovine bone in terms of bone increment.</p>