There are several things to think about in a case like this. First, what advice or counsel has your father's doctor given you? Is your father osteoporotic, a smoker, or have diabetes or cancer? All these things can delay bone healing.
Replacing a broken, infected hip with an implant can be a very good idea. Your father will likely be able to get back on his feet sooner. Early and rapid mobilization can reduce other health problems like blood clots, pneumonia, and muscle weakness.
A recent study at the Mayo Clinic in Rochester, Minnesota, compared two groups of patients. One group had a hip fracture that didn't heal. The joint was replaced. The other group of patients who received a hip replacement didn't have a hip fracture first.
Durability of the implant was less in patients who had a hip fracture first and then a joint replacement. The rate of hip dislocation was also high (almost 10 percent) in this group. It may be best to sit down with your father and the doctor and go over all the
risks and benefits before making this decision.