the most causative factors including traffic accidents , disputes , falls , sports injuries , occupational injuries and manner of social life are different amongst countries . factors such as manner of social life , use of vehicles , more usage drug and alcohol , widespread urban violence , dangerous sports can increase the incidence of trauma events . fortunately , the use of safety helmets and technology advances lead to safer vehicles and decrease in such injuries . previous studies have shown that most patients suffering trauma are male and in third decade of their life.[46 ] maxillofacial fractures can be classified according to mandibular , nasal bone , zygomatic and maxillary fractures . mandibular fractures include : simple , compound , comminuted complicated , greenstick , pathological and impacted fractures . also , it can be arranged by site of fractures such as alveolar , condyle , coronoid , body of mandible , angle of mandible and symphysis fracture . according to the pattern of fracture and muscle attachment , displacement of fracture segments maxillofacial fracture directly or indirectly can cause infection of nasal cavity , maxillary sinus , eye and brain abscess that deserves more consideration by specialist . when a facial fracture occurs , rehabilitation and reconstruction of the injured structures are of utmost importance . the goals of facial fractures treatment are rapid improvement of bone status , vision , chewing , talking and providing a favorable condition to revive function , esthetics and patient beauty . to achieve these goals , in addition to following principal rules of fractures treatment , in facial bones regardless of the type of fracture , the first step is to put teeth in proper occlusion to minimize patients inability of nutrition and enhance patient comfort . the aim of this study was to clarify the main causes of maxillofacial fractures in yazd , iran to increase public and professional awareness and knowledge for preventing more injuries and subsequent consequences . statistical population of this retrospective cross - sectional study included 194 patients has been admitted in yazd public hospital , iran . in this study variables such as age , gender , cause of accident , site of fracture and method of treatment were recorded in a questionnaire . accident causes were classified as follows : car and motor accident , fight , violence , land erosion , damage to sports and physical abuse . also , site of fractures such as mandible , maxilla , and zygoma , nasal , frontal and orbital was considered . after collection of all questionnaires , data were analyzed by spss software with descriptive analysis . one hundred and ninety four patients selected for this study ( 69% male and 31% females ) with age range between 20 to 29 years [ tables 1 and 2 ] . according to our result , most sites of fractures were in nasal bone ( 79% ) [ table 3 ] . frequency distribution of patients based on gender frequency distribution of patients based on age group frequency distribution of patients based on site of fractures fractures reasons in yazd city respectively was : motorcycle accident with 45% , car accident 26% , falls 20% , sports injuries 8% , argument and dispute 1% . after evaluating causes of maxillofacial fractures , the most frequent cause of injuries were motor cycle accidents ( 45% ) [ table 4 ] . frequency distribution of patients based on cause of fracture also , majority of people who had fractures were in the age group 20 - 29 years and the main cause of fractures in them was motorcycle accident . however , the most common cause of accident was different in each age group [ tables 59 ] . frequency distribution of patients based on type of treatment cause of fracture distribution based on gender cause of fracture distribution based on age group site of fracture distribution based on gender site of fracture distribution based on age group epidemiological studies in any society are increasing the quality of life . comparing our results with other studies showed that damage to the mandible is more in the world but in yazd , nasal bone fracture is more prevalent ( 79% ) . similar study in nigeria reported most incidence in age group with 21 - 30 years and in ahmad study with 20 - 29 years . statistical difference for gender was like other studies that the fracture incidence in male was 2 times more than female . the most common causes of maxillofacial fracture in yazd was according to following descending order : the most reasons related to the motorcycle accident with 45% , car accident 26% , falls 20% , sports injuries 8% , argument and dispute 1% . world reported region of high risk group were 21 - 29 years old people similar to our results but exceptionally , in yazd , injuries under 10 years age was much more than other part of the world , so more attention should be paid in this age group . result of our study , confirmed that facial fractures varies from one region to another and knowing these reasons helps prevent and treat these injuries .
background : fracture , is discontinuity of anatomical bone relations . 
 commonly , a maxillofacial fracture occurs after trauma but the etiology and pattern of this entity is different amongst countries . 
 the aim of this study was to clarify the main causes of this entity in yazd to increase public and professional awareness to prevent more injuries and subsequent consequences.materials and methods : this retrospective cross - sectional study consisted of 194 patients admitted in public hospitals in yazd , iran . 
 variables such as age , gender , cause of accidents , site of fracture and treatment method were noted and recorded in a questionnaire filled during hospitalization of these patients . 
 causes of accident were classified by 6 reasons such as accident by car and motorcycle , fighting and violence , falls , sports and occupational injuries . 
 the site of fractures , including mandible , maxilla , nasal , frontal and orbital were considered . 
 the data were analyzed using descriptive analysis.results:the results showed that maxillofacial fractures are more prevalent in male than females ( 69% versus 31% ) . 
 the most sites of fractures were nasal bone ( 79% ) . 
 the majority of people with maxillofacial fractures were in the age ranged between 20 - 29 years and the main reason of maxillofacial fractures was motorcycle accident.conclusion:according to our result , most sites of fractures were in nasal bone . 
 the main cause of maxillofacial fractures was motorcycle accident . 
 however , in each age range the most common cause of accident was different .