الفهرس 
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Abstract
This work was divided into two main categories (A) Clinical cases: In this part of the research, surgical treatment of hip dysplasia, hip luxation, femoral neck fracture, and degenerative hip joint disease were performed using femoral head and neck ostectomy (FHO). A thirty three different breeds of dogs weighing 14-52 kg suffering from different hip joint disorders were admitted to the Vet. Surgery clinic, Faculty of Vet. Med. Zagazig University and from some different private pet animal clinics. They were of different breeds including 13 German shepherded, 6 rottweiler, 4 golden retriever, 2 Caucasian, 1 saint Bernard, 1 mongrel dog, 1 husky, 1 Pitbull, 1 presa canario, 1 malino, 1 Samoyed and 1 mastif dog. They were of different sexes.
The admitted cases were diagnosed by clinical signs (visual pain assessment and lameness scoring), clinical crepitus exam, and plain radiography. The FHO technique applied in the affected cases revealed successful results with the absence of painful lameness noticed after 3 weeks postoperatively but nonpainful lameness was observed then decreased gradually till disappearance when muscles become stronger to compensate for the absence of the head of the femur with minimal complications. FHO is a very good salvage economic satisfactory technique with minimal complications. Using an oscillating saw and sharp osteotome is better than using of Gigli saw which leave small part of the femoral neck.