treatment of tibia bone infection post surgery:

After an accident my fathers tibia was broken, an implant was inserted in a surgery.

Post surgery infection was developed forming pus. After 1.5 years implant was removed and bone was cleaned in a surgery. Even after removal of implant, infection remained same.

Now after 1.5 years of second surgery , doctors are suggesting another surgery to clean the bone once again. We have consulted another doctor who suggested to implant a ANTIBIOTIC NAIL after cleanup surgery.

Please suggest how should we proceed to handle this case?