Incidence and pattern of mandible fractures in AAU affiliated hospitals (Yekatit 12 Hosptial Medical College and St.Peter’s specialized Hospital) Addis Ababa, Ethiopia.

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Addis Abeba University


Objectives: The objective of this study was to assess the incidence and pattern of mandible fractures in AAU affiliated hospitals in Addis Ababa, Ethiopia over a retrospective period of 3 years from January 2017 to December 2019 G C. Methodology: Retrospective review of pat ient’s records was conducted among those patients who visited AAU affiliated hospitals having mandibular fractures. The study was conducted from November, 2019 to August, 2020. The patients chart with incomplete information and those which are absent from shelf were excluded from the study. The data was entered, cleaned and analyzed using Epi info data version 7.0 Software. Descriptive analysis was computed as frequency of fractures, distribution of age, gender, etiology, diagnosis, and anatomical sites of mandibular fractures. Results: A total of 247 patients who were retrospectively evaluated at Yekatit 12 HMC and St.Peter’s specialized hospital between January 2017 and December 2019 sustained 343 mandibular fractures (mean of 1.4, range 1-3). The incidence of mandibular fracture was higher in male patients (83%) than in females (17%) (Male: Female ratio 5:1), and the peak incidence was during the third decade for both genders. The most common site of fracture was the body (26.53%), followed by the angle (23.9%), and parasymphysis (19.82%). Overall, interpersonal violence (46.15%) was the most common cause followed by RTA (27.53%). In male patients, the most common cause was interpersonal violence (50%); in females it was a RTA (34.14%). The anatomical sites of fracture reflected their cause. A total of (n=76, 30.76%) patients sustained other non-maxillofacial injuries of which head injury (n=58, 23.48%) is the most common. Conclusions: The most common cause of mandibular fracture was interpersonal violence. Mandibular fractures were more common in males than females with most patients aged 21-30 years. The most common fracture site was body of the mandible. The predominant treatment modality was open reduction and internal fixation (ORIF).



Mandibular fractures, Body, Etiology, Interpersonal violence (IPV), ORIF.