Tribology in Orthopaedics — MCQs

Among the following dental files made of the same steel and size 55, which one is more prone to fracture?

In a functional implant, bone loss seen annually after 1 year is:

Most reliable method to identify putrefied bodies with metallic implants?

Which prosthesis is shown below in the X-ray?

A 65-year-old lady presented with a swollen and painful knee. On examination, she was found to have grade III osteoarthritic changes. What is the best course of action?

During performing a total hip replacement, the surgeon found destruction of the articular cartilage and multiple wedge-shaped subchondral depressions. What is this called?

What is the primary use of stainless steel in orthodontics?

A 9-month-old girl is brought by her mother who noticed asymmetric skin folds on the thighs and difficulty abducting the left hip during diaper changes. She was a firstborn, delivered in breech presentation. Examination reveals limited abduction of the left hip to 30 degrees. The pelvis radiograph is shown (Image 1). Which of the following is the most appropriate next step in management?

A 16-year-old boy presents with a 6-week history of progressively worsening pain and swelling around the right knee. He denies any trauma. On examination there is a firm, tender, warm swelling over the distal femur. Serum alkaline phosphatase is markedly elevated. The plain radiograph is shown in Image 1. Which of the following is the most appropriate next step in management?

Which of the following diagnostic studies is NOT useful in the evaluation of upper-extremity pain?