In open-pack position for a joint, which is true?

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Prepare for the ABFAS Boards with our comprehensive quiz on Rearfoot and Forefoot topics. Dive into multiple choice questions, get detailed explanations, and boost your confidence for success!

Multiple Choice

In open-pack position for a joint, which is true?

Explanation:
Open-pack (loose-packed) position is the state where the joint is least congruent and the capsule is lax, with the ligaments slackened. In this position the articular surfaces contact each other minimally, which allows more accessory movement and makes it easier to perform joint mobilizations. That’s why the statement about the least amount of cartilage contacting is the best answer. In contrast, a close-packed position has maximal congruency and tight ligaments, providing stability but limiting motion. Dislocation or immobilization are not defining features of the open-pack position.

Open-pack (loose-packed) position is the state where the joint is least congruent and the capsule is lax, with the ligaments slackened. In this position the articular surfaces contact each other minimally, which allows more accessory movement and makes it easier to perform joint mobilizations.

That’s why the statement about the least amount of cartilage contacting is the best answer. In contrast, a close-packed position has maximal congruency and tight ligaments, providing stability but limiting motion. Dislocation or immobilization are not defining features of the open-pack position.

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