The Appraisal Study Of Maxillofacial Injury Severity Degree

Maxillofacial part is made of many bones, which sustain natural maxillofacial shapes. In the middle of maxillofacial part bones are united by bones aperture, combine many skeletal sinuses. Orbital sinus; nasal cavity; oral cavity contains important organizational organs. Because maxillary bones is thinner, when it is injured many bone fractures will be found. Mandible has very special shape, when it suffers from force, many boned fracture will be found simultaneously in mandible. The marked character of maxillofacial trauma is many boned fracture, after patients injured mainly shows facial deformity, functional and psychological handicap, but are far-forth worse than who patients don't die usually.With the improvement of modernization and the change of life style in our country, trauma incidences have increased greatly, which has heavily threatened our health and quality of life as a nosogenetic factor. Therefore more and more attention has been paid to the treatment of maxillofacial trauma. Now maxillofacial trauma severity scores has not uniform criterion in domestic and foreign country, the epidemiological study of maxillofacial trauma has not uniform criterion either, which makes the outcome of epidemiological study have no scientific research value. Moreover the existing traumatic appraisal methods can not evaluate maxillofacial trauma availably, so it is necessary to study maxillofacial traumatic appraisal methods conformed to maxillofacial surgery characters. Maxillofacial trauma severity scores had been reported rarely in foreign papers, but there were many research papers of this problem in our county. But they did not realize that maxillofacial anatomic trauma can affect maxillofacial function, their appraisal methods mixed maxillofacial anatomic trauma and maxillofacial function, and trauma indexes were too simple and incomplete. Thus their methods can't show exactly maxillofacial injury severity. The purpose of this study is to establish a method of trauma severity scores evaluation, which makes different trauma can be compared, provides uniform criterion for epidemiological research and trauma database.Delphi technique and analytic hierarchy process (AHP) were employed to set up an appraisal method of maxillofacial injury severity. In the study, maxillofacial anatomical and functional injuries were divided into hierarchies, and every hierarchy was further divided into several injury indexes by the idea of AHP, with every injury index classified. Every injury index in the same hierarchy was valuated by other indexes through Delphi technique, to gain compounded weight of every index. The results showed that the appraisal means of maxillofacial anatomic and functional injury severity was obtained, the appraisal methods was expressed by the sum, which was added by the product of the average compounded weigh and classification of appraisal indexes severity degree. Then 60 clinical maxillofacial traumatic cases were selected, anatomic and functional injury severity were summed respectively, the correlation of two sums models were analyzed.The result of the study shows that it is an effective method to apply the Delphi technique and analytic hierarchy process (AHP) to setting up the appraisal means of maxillofacial injury degree, making qualitative description of maxillofacial injury into quantitative data. Mathematics model of injury severity scores have statistics significant correlation between the anatomic and functional injury, Correlative coefficien(t0.674)was obtained, correlation is significant at the 0.01 level. It demonstrates that maxillofacial anatomic injury indexes can reflect maxillofacial functional injury severity when maxillofacial injury severity is appraised. Maxillofacial injury severity is not only appraised exactly but also abbreviated. The record system of maxillofacial trauma is ruled by the new appraisal methods.