Johns Hopkins University Orthopedic Department at Good Samaritan Hospital provides a comprehensive range of orthopedic services to its patients. The department s attending physicians provides consultation services to adults undergoing reconstructive surgeries. This includes the surgical treatment of arthritis problems, particularly in the hip and knee. The surgeries performed by the Johns Hopkins University s physicians include core decompression, osteotomy of the hip and knee, total hip and knee replacement, as well as revision total hip and knee surgery. In addition to the standard cases performed, its orthopedic division is recognized throughout the United States as a tertiary referral center for more difficult cases and for various types of revision surgeries. The orthopedic group has been actively involved in establishing a research center for patients diagnosed with avascular necrosis of bone. Some of the surgeries performed in the department include trap door procedure, core biopsy, arthroscopy, menisectomy, fusions, bone grafting, resurfacing arthroplasty, bipolar and osteotomies. The department is located in Baltimore.