The American journal of orthopedics
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Review Case Reports
Proximal humerus osteolysis after revision rotator cuff repair with bioabsorbable suture anchors.
Biodegradable anchors were designed to provide secure fixation while allowing for later resorption and replacement by host tissue. First-generation implants degraded relatively rapidly and caused foreign-body reactions, synovitis, fragmentation, and osteolysis. ⋯ Case reports have described glenoid osteolysis around biodegradable suture anchor placement for shoulder stabilization, but up until now, to our knowledge, only 1 case of proximal humerus osteolysis has been reported for these implants. Here we describe a semicrystalline, poly-L-lactic acid bioabsorbable suture anchor failure after revision rotator cuff repair with subsequent humeral tuberosity osteolysis.
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In this article, we describe a case series study involving a new radiologic evaluation of sagittal imbalance. We review the current radiologic assessment of sagittal imbalance and introduce a new radiologic evaluation that helps in ruling out hip flexion contracture as the primary cause of sagittal imbalance and the type and level of spinal osteotomy required to regain sagittal balance. Sagittal imbalance is important in spinal deformity assessment. ⋯ Interobserver reliability was lower but good (κ = 0.76). Inclusion of the proximal femur on the long upright lateral plain radiograph of the entire spine and identification of the relation between the femoral axis line and the center of C7 are important in evaluating sagittal imbalance. Excellent intraobserver reliability, coupled with good interobserver reliability, suggest that this new radiologic assessment method can be helpful in preoperative assessment of sagittal imbalance.
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Proximal humeral fractures can safely and effectively be treated with minimally-invasive plate osteosynthesis (MIPO). Twenty-one patients treated with MIPO for 2-, 3-, and 4-part proximal humerus fractures were treated at a mean 6.8 days (range, 1-24 days) after injury and followed for a mean of 24 months (range, 5-38 months). All fractures healed by 8 weeks postoperatively, with reductions "good" in 18 (86%) of patients and "fair" in 3 (14%). ⋯ The mean Disability of the Arm, Shoulder, and Hand (DASH) score was 25.95 (range, 0-80). Excluding patients with associated injuries, a statistically significant difference (P<.05) was found in the DASH scores for those patients with greater tuberosity displacements between 3 mm and 8 mm and those patients with greater tuberosity displacement greater than 8 mm inferior to the articular surface. Clinical outcomes depended upon reduction of the greater tuberosity, which is facilitated by the MIPO technique.