Surgical treatment of displaced XXXX with a short intramedullary nail.

@entity1 @entity174 @entity819
BACKGROUND: The Polaris nail is an intramedullary device for treating displaced @entity174 with few published studies to support its use. Results of a consecutive series of @entity1 treated with the Polaris nail are presented. METHODS: Eighteen @entity1 with a mean age of 71 years (range, 37-84) were treated for twelve 2- and six 3-part @entity174 . Radiographic results for all @entity1 were evaluated. Thirteen @entity1 with an average follow-up of 42 months (range, 24-84) were available for functional evaluation. RESULTS: Seventeen of 18 @entity1 healed. Postoperatively, the neck/shaft angle collapsed an average 11   (range, 5-30  ) into varus. Nine of 18 @entity1 had final neck/shaft angles <120   and were considered radiographic malunions. The mean Constant and American Shoulder and Elbow Surgeons (ASES) scores were 61 (range, 20-100) and 67 (range, 10-100), respectively. Forward elevation averaged 118  . @entity1 had an average 5/8 positive rotator cuff signs. Seven @entity1 underwent reoperation for loss of fixation or prominent hardware, and 1 required revision to a hemiarthroplasty. CONCLUSION: This study shows a higher than reported percentage of unsatisfactory results using the Polaris nail. The device violates the rotator cuff and is unable to resist the deforming forces that can lead to @entity819 .
