The critical force and energy required to facilitate synovial joint cavitation are presented as functions of seven parameters: joint and patient stiffnesses, joint and patient elasticities, the proportion of impacting energy entering the joint and patient, and the critical joint distraction at which cavitation occurs. These parameters are governed by numerous properties of the patient, doctor, joint, and the adjustive process. Equations for the critical force and energy are derived and the seven parameters and their governing factors are discussed.
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