An Experimental Study On Indirect Injury Of Teeth And Inferior Alveolar Neurovascular Bundle Caused By Maxillofacial Trauma

As an exerted part of the body, maxillofacial region has a high attack rate of trauma. When the region suffers impact injury or high velocity projectile injury, indirect injury of adjacent tissues and organs will usually occur. Teeth and inferior alveolar neurovascular bundle locate at the mandible; they would be subjected to indirect injury if the mandible is wounded. However, studies on indirect injury of teeth or inferior alveolar neurovascular bundle were seldom reported up to now.With the transition of medical model, during the treatment of the patient, we should not only save their lives, but also consider the rehabilitation of physiological function after treatment. A tooth is a significant organ for manducation and phonation; inferior alveolar nerve is one of the most important sensory nerves in maxillofacial region; they should not be ignored in trauma cases of oral and maxillofacial region. Furthermore, pulp tissues and periodontium differ from other tissues in morphosis and function. Therefore, it is necessary to study the characteristics of indirect injury of dental pulp, periodontium and inferior alveolar neurovascular bundle accompanying maxillofacial trauma.In this study, we used a new type of level air-pushed multifunctional bio-impactor device. This device could be used for implementing impact injuries or high velocity projectile injuries by some adjustment. By vulnerating mandibular body of excised dog's head with the bio-impactor, an animal model of indirect injury of teeth and inferior alveolar neurovascular bundle caused by maxillofacial impact injury and an animal model of indirect...