HARI KRISHNA, N.V.V(MAJOR)RAGHUNATH, MVAIKUNTA RAO, VRAMESH CHANDRA, T. S.2018-06-052018-06-052016-11http://krishikosh.egranth.ac.in/handle/1/5810049079THESESABSRACT: The present study was conducted on clinical cases with femur fractures presented to the department clinics. In the present study, highest incidence was observed in femur (33.92%) out of total fracture cases and in femur 52.50% were diaphyseal. The cases selected were grouped into two groups of six each. In group I, the fracture was stabilised with IM pin and in group II with “stack pinning” using two IM pins, filling only 70-80 % of medullary cavity. Cerclage wires were used as ancillary fixation in required cases. Lateral and cranio-caudal radiographs of the fractured bone were taken for confirmatory diagnosis, implant selection and surgical approach. Craniolateral approach was used to expose the fracture fragments and reduction under isoflurane anaesthesia. Retrograde technique followed in both the groups was satisfactory. The dogs were evaluated by radiography, serum biochemistry and lameness grading on 0, 15th, 30th and 60th post-operative days. The fracture healed by secondary healing in both the groups with development of bridging periosteal callus. There was no significant difference between the groups and intervals with regard to serum calcium and phosphorus. Elevation of ALP from 0 to 60th postoperative day was observed in both the groups. All the animals regained normal return to weight bearing early (within one month). The IM pin was removed on 60th postoperative day. Seroma and pin migration were observed in three cases. To conclude, intramedullary pinning was an easy, most economic, less time consuming and least traumatic technique for the stabilisation of femur fracture in dogs with good outcome. However, stack pinning provided no advantage of increased torsional stability. The technique resulted in early weight bearing and good functional limb out come.ennullThesis