December 2022 saw the first ever Case Competition on myAO. Surgeons from across the 5 specialties of the AO network shared interesting cases to be reviewed and discussed with their peers on myAO groups. The competition was tight but after deliberation we were delighted to announce the winners:  From die-punch fractures to shoulder instability in dogs, the winning surgeons showed us how they successfully managed treatment. Have a look at the winning cases below and feel free to leave a comment or show your appreciation thanks to the applaud function.  Die-punch fractures Dr. Anirban Chatterjee, MD, India  Trauma A die-punch fracture is a depression fracture of the lunate fossa of the distal radius that is caused by a vertical load through the lunate. In some cases, the die-punch fracture is in a state that is difficult to reset, such as when it is not limited to the lunate fossa.  Review the full case here  RFFF reconstruction of the Upper Lip  Dr. Alberto Rocha Pereira, Hospital da Luz, Lisbon/Portugal  CMF The radial forearm free flap (RFFF) is a flap with ideal characteristics for lip reconstruction because it is thin and can be folded to restore both the skin and the inner lining.  Review the full case here  THA with acetabular dysplasia   Dr. Yossef Elhelw, Egypt Recon Total hip arthroplasty with acetabular dysplasia presents many challenges to the reconstructive surgeon. The complex femoral and acetabular anatomy makes standard reconstruction technically challenging.   Review the full case here  Shoulder instability in dogs Dr. Lorenzo Pillin, the Netherlands VET Shoulder instability (SI) is one of the most common causes of front leg lameness in dogs. SI describes a wide range of soft tissue injuries to the ligaments, tendons and muscles of the shoulder. It affects all sizes and breeds of dogs.  Review the full case here   Not yet on myAO? Download the app and create your free account today!  Download app