um of at least nine months has to elapse since the initial injury, and there should be no signs of healing for the final three months for the diagnosis of fracture nonunion. There are a few different classification systems of nonunions, but nonunions are most commonly divided into two categories of hypervascular nonunion and avascular nonunion. In hypervascular nonunions, also known as hypertrophic nonunion, fracture ends are vascular and are capable of biological activity. Here is evidence of callus formation around the fracture site and it is thought to be in response to excessive micromotion at the fracture site. Avascular nonunions, also known as atrophic nonunion, are caused by avascularity, or inadequate blood supply of the fracture ends. There is no or minimal callus formation, and fracture line remains visible . is nonunion requires natural enhancement in addition to adequate immobilisation to heal.

Treatment of mandibular aims in achieving the bony union, right occlusion, preserve IAN and mental nerve function, to prevent malunion and to attain optimal cosmesis. Rigid plate and screw fixation have the advantage of allowing the patient to return to the role without the need of 4–6 weeks of IMF; but the success of rigid fixation depends upon accurate reduction. During adaptation of manipulating in a champys line of osteosynthesis in symphysis region, even main bar applied to the tooth for proper occlusion, but still, the bone fragments overlap bone prominence. Gaps will be present. To achieve bone contact for healing various method are devices for the same to hold the fracture segments together like Towel clamps, Modified towel clamps. Stress patterns generated by Synthes reduction forceps, orthodontic brackets, allis forceps, manual reduction, elastics internal traction reduction, bone holding forceps, tension wire method and vacuum splints, as without which there is always a gap and inability to fix using mini plate intraoperatively. Proper alignment and reduction are essential for mastication, speech, and normal range of oral motion.