He had a dislocation of his left hip with a fracture of the femur head inside the joint capsule. The femur head has fragmented.
Further management is directed to relief of pain with subsequent ambulation.
Early hip arthroplasty, either bipolar, unipolar or total hip is an option but bear in mind that the revision rate is high. I suggest fusion so as to achieve a stable hip with no pain and the patient can ambulate without fear of common problems associated hip arthroplasty especially in young individuals. However at a later age patient may opt for total hip arthroplasty at say 50-60 years old. I recommend that you aproach the hip posteriorly and reconstruct the femoral head with autogenous bone graft. The fragments can be secured with appropriately sized Hebert screws.