Extent of tibiofemoral osteoarthritis before knee arthroplasty: multicenter data from the osteoarthritis initiative.

Background: Knee arthroplasty traditionally is recommended for persons with substantial disability and disabling pain attributable to moderate or severe osteoarthritis (OA). Pain and functional status after arthroplasty may be influenced by the extent of knee OA before surgery and recent evidence suggests persons with less severe knee OA before undergoing TKA have greater pain levels and worse function than persons with more severe knee OA.

Questions/purposes: We determined the proportion of patients undergoing knee arthroplasty who had less than moderate knee OA before surgery and who had either a radiographically normal medial or lateral joint space before surgery.

Pectoralis major tendon avulsion from rappelling.

To our knowledge, we are reporting the first case of a pectoralis major tendon avulsion from rappelling. The mechanism of injury in this case differs biomechanically from the commonly associated activity of bench pressing. The patient's initial presentation, course of corrective treatment, and postoperative rehabilitation is discussed in detail.