BackgroundThe stability provided by Load Sharing Miniplate Osteosynthesis (LSMO) in dentate mandibular fractures (DMF) is usually adequate for bone healing. Non-union following LSMO is an uncommon complication. Objectivesto determine the incidence and identify contributing factors, if any, on non-union amongst DMF that have undergone a LSMO. MethodsA Retrospective Case-Control study with allocation ratio of 1:3; Cases included DMF Non-union following LSMO and Controls included healed DMF following LSMO over a 5-year period. Relevant socio-demographic data, mandible fracture characteristics and treatment variables were collected for both groups of patients. ResultsOf the 381 patients who underwent LSMO DMF, 12 cases of non-union were identified. Control group included 36 patients with uncomplicated healing. A significant association was observed between non-union and tooth in the line of fracture, post-operative infections and time from injury to LSMO. Odds Ratio with chronic alcohol usage was 1.4. Conclusion:Vigilant follow-up of patients with chronic alcohol use, teeth in fracture line and adherence to LSMO principles may help in minimising the non-union complication.