Flashcards on Stiff Finger Joints: Diagnosis and Treatment
Stiff Finger Joints: Diagnosis & Treatment Guide for Students
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Finger Joint Arthroplasty Techniques
103 cards
Card 1
Question: What are the three types of implants commercially available in the United States for metacarpophalangeal (MP) joint arthroplasty (as of 2010)?
Answer: Silicone elastomer implants (hinged spacers after resection arthroplasty), a metal-and-plastic surface replacement arthroplasty (SRA) designed for cem
Card 2
Question: For which patient population have silicone elastomer MP joint implants traditionally been most commonly used?
Answer: Patients with rheumatoid arthropathy; less commonly for trauma or isolated degenerative arthritis.
Card 3
Question: What are the main advantages of silicone elastomer implant arthroplasty for finger joints?
Answer: Known material with long track record; predictable and dependable in low-demand patients; provides a serviceable result in painful and stiff arthritic
Card 4
Question: What are the major drawbacks of silicone elastomer implants for finger joints?
Answer: Limited range of motion and stability, susceptibility to rotation and lateral deformation, dependence on surrounding soft tissues for stability, commo
Card 5
Question: Does implant fracture of silicone elastomer always require revision surgery?
Answer: No — implant fracture is common but does not necessarily imply the need for revision.
Card 6
Question: What is surface replacement arthroplasty (SRA) attempting to recreate in finger joints?
Answer: The normal geometric articulation of the premorbid joint, aiming to restore near-normal kinematics with a virtual center of rotation.
Card 7
Question: List the theoretical advantages of SRA for finger joints.
Answer: Reconstructs an anatomic joint with a virtual center of rotation (allowing rolling and sliding), improves mechanical advantage of agonist muscles, req
Card 8
Question: What are the main disadvantages and challenges of SRA in the MP joint?
Answer: Higher risk of subluxation or dislocation, increased technical difficulty in tendon balancing, difficulty revising a failed arthroplasty, and general
Card 9
Question: Why has development of a reliable SRA device for the MP joint been difficult?
Answer: Because of problems associated with stability of the prosthesis in the MP joint.
Card 10
Question: What contributions did Linscheid and associates make to MP joint SRA design?
Answer: They developed SRA components based on extensive anatomic and histologic evaluation of normal articular surface geometry, producing a design that prov