Comparative study of processed autogenous tooth bone and xenogeneic bovine bone in repairing an alveolar bone defect / 华西口腔医学杂志

<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>

Research progress in applications used for guided tissue regeneration in endodontic surgery / 口腔疾病防治

@#Conventional root canal therapy can not completely treat all periradicular lesions, especially combined endodontic-periodontic diseases, large periapical lesions and bone defect lesions. Guided tissue regeneration greatly improves the success rate of endodontic surgery in treating these lesions. This article focuses on the application of various grafting materials, guided bone regeneration membranes and regulatory factors in endodontic surgery.

Study on Communicating Branches of Sural Nerve: Review of Literature and its Clinical Implications.

Introduction: Variations of nerve are not only of anatomic and embryological interest but also of clinical importance. Their adequate knowledge will help in increasing surgical precision and decreasing morbidity. Materials and Methods: In the present study the communicating branches of sural nerve were studied. The material for the present study comprised of 60 lower extremities belonging to 30 adult human cadavers obtained from Department of Anatomy, GMC, Amritsar, India. The sural nerve was identified and traced downward in the limb. Result: In the present study these communicating branches arose either from lateral sural cutaneous nerve (branch of common peroneal nerve) or superficial peroneal nerve (intermediate dorsal cutaneous branch) or from tibial nerve itself. Discussion: Sural nerve is usually used as grafting material. So these described variations are helpful for planning operative approaches that minimize risk of sural nerve injury. Moreover the anatomic course of nerve in distal leg and ankle makes it susceptible to local trauma and also to increased risk of injury during surgical intervention at ankle.