Use of beta-blockers and risk of aseptic loosening in total hip and knee arthroplasty: a nested case - control study.

Objectives: To analyze the effect of beta-blockers on the risk of aseptic loosening (AL) in Total Hip (THA) or Knee (TKA) Arthroplasty.

Methods: A nested case-control study was conducted. Cases were patients who underwent revision surgery for THA or TKA due to AL.

Avulsion Fractures of Posterior Calcaneal Tuberosity: Identification of Prognostic Factors and Classification.

Avulsion fractures of the posterior calcaneal tuberosity are rare injuries, and little is known about the underlying factors, outcomes, and prognosis. Furthermore, classifications described previously focus on fracture morphology, with uncertain clinical utility. We present the results of a retrospective study of 21 patients treated for this pathology from January 2002 to December 2015.