ABSTRACT
An analysis of the characteristics of the facial fractures in children was performed in this paper by investigating the cases of the facial fractures in children.In the study,86 cases of facial fractures in children under 12 years from January 2000 to June 2008 were reviewed,who were treated by the Fourth Military Medical University. The information included the age,gender,time distribution of jury,type of fracture, nerve injury, and associated systemic injuries. The youngest age was 13 months, the ratio of male to female was 2.19∶ 1. The majority of fractures were occurred in summer. The most cases were caused by the traffic accidents, and the mandible fractures were higher than others. The number of conservative treatment were higher than operation,78% cases of condyle fractures were treated conservative, the operation of maxilla and zygomatic arch fracture were less than 50%. The males were higher than the females according to the facial fracture in children.Traffic accident was the main risk factor of condylar fracture. The mandibular fractures were occurred frequently and treated normally by conservative method.
ABSTRACT
Objective: To study the injury characteristics of blast injury in maxillofacial region wounded by spherical explosive. Methods: Spherical explosive was used to wound maxillofacial region in rabbits , after gross observation of the trauma , bone tissue specimens were collected from 0.5 or 1.0 cm to the boundary of wound 6 hours, 3 and 7 days after wounding respectively, the samples were prepared and stained with HE and modified Mallory's trichrome staining and observed under light microscope . Microcirculation in wounded bone was studied by ink injection and observed in ground bone sections. Results: No changes were found 6 hours after injury. Inflammatory infiltration were found 3 days after injury.Osteonecrosis was observed 7 days after injury, the structure of bone beyond 0.1 cm of the wound was found to be normal and restoration of bone was observed. Conclusion : Pathological changes of mandible injured by spherical explosive are similar to those of usual fracture except that the wound of blast injury is seriously polluted.
ABSTRACT
Objective: To estabish an animal model with blast injury in maxillofacial region and to study the biomechanical property of the model.Methods: Spherical explosive at different distances was used to make wound in maxillofacial region in dogs. The pressure on tissue at different level, the variation of horizontal acceleration and strain of the mandibular and temporal bone were dynamically measured.Results: About 3.5 cm?3.0 cm soft tissue defect and madibular splintered fracture occurred in maxillofacial region when the spherical explosive exploded on the surface of the dog's face and the animal survived. The pressure on mandible was respectively 3.6%?2.9% of the surface of dog's face when the spherical explosive exploded 0 and 1.00 cm away from the dog's face while the ratio of horizontal acceleration of cranium to mandibular was 1/8?1/6. Splintered fracture occurred in mandible when the mandibular strain was 11 375 ??.Conclusion: The model can be applied as an animal model with blast injuries in maxillofacial region.
ABSTRACT
Objective:To summarize the experience in clinical diagno sis of lymphonode reactive hyperplasia (LRH). Methonds: 39 cases with the final pathological diagnosis of lymphonode reactive hyperplasia were retrospectively reviewed.Results: 39 patients had th e incidence at the age of 7～61 years old and the medical history of 14 days ～8 years.The patients consulted doctors because of unilateral or bilateral painles s masses in the superior neck and low fever.32 of them underwent repeated antib iotics treatment.On admission 9 cases were diagnosed with lymphoma,6 tuberculos is,6 inflammation of lymph node and 18 were without identified diagnosis.The f inal pathological diagnoses of all the 39 cases was LRH.Antibiotic treatment wa s effective in the patients.Conclusion:LRH was usually mis diagnosed as other diseases.Swelling of lymph nodes in superior neck with low fe ver is the main symptom of LRH.