1. It is suggested that replacement of the costo-clavicular ligament is mechanically an essential part of the operative treatment of recurrent sterno-clavicular dislocation.2. Tenodesis of the subclavius appears to be the simplest and safest way of achieving such replacement.3. Two cases are described of recurrent sterno-clavicular dislocation treated by this procedure and capsulorrhaphy.4. Full function was restored in both cases; and there had been no recurrence at the times of follow-up—three years and six months after operation in the first case, and twelve months after operation in the second. In this case the joint had withstood violence that had shattered the clavicle.5. Further trial in judiciously selected cases, with report, is suggested.
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