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Technique guides are not considered high yield topics for orthopaedic standardized exams including ABOS, EBOT and RC.
A 67-year-old woman presents with chronic right hip pain, exacerbated by long walks. She has limited hip range of motion, particularly in flexion and internal rotation. Radiographs are depicted in Figure A. This is her first time seeking treatment. What is the mechanism of action of a medication strongly recommended for short-term pain relief according to the most recent (2013) AAOS Clinical Practice Guidelines?
Direct action on hypothalamic regulating center with anti-pyretic effects
Binds to cannabinoid receptors in neural tissues
Binds directly to nuclear receptors to interrupt the inflammatory and immune cascade via mRNA changes
Maintains synovial fluid viscosity and supports articular cartilage shock absorption
Inhibits sodium ion channels to inhibit sensory nerve impulse initiation and conduction
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A 67-year-old male golfer presents with right hip pain of three years duration which has persisted despite daily oral anti-inflammatory medications and physical therapy. He wishes to compete in a recreational golf tournament in five months. Which treatment modality would offer the most reliable functional improvement in this patient?
Hyaluronic acid injection
Cemented hip hemiarthroplasty
Cementless total hip arthroplasty
Which of the following is a characteristic change in cartilage involved in moderate osteoarthritis?
Decreased thickness of subchondral bone
Decreased chondrocyte activity
Increased proteoglycan quantity
Increased water content
Increased collagen quantity