v4.1 Fusion X
Incidence 1–3% after primary THA; higher in revision. Risk factors: posterior approach, malpositioned cup (anteversion 25°, inclination >60°). Patient factors: neuromuscular disease, dementia, noncompliance. Management: closed reduction, bracing; revision for recurrent instability. Prevention: proper cup position, posterior repair, large femoral heads.
What is the incidence of dislocation after primary total hip arthroplasty (THA)?
Which surgical approach is associated with the highest dislocation rate after THA?
What is a major modifiable risk factor for dislocation after THA?
Which of the following is part of the 'safe zone' for acetabular cup positioning?
What is the initial management step upon confirming dislocation of a THA?
Which of the following factors is NOT considered a patient-related risk factor for dislocation after THA?
What is the recommended management for recurrent dislocation after THA?
Which biomechanical principle is crucial for hip stability after THA?
Which of the following strategies can help prevent dislocation after THA?
What is the most common direction of dislocation following a posterior approach THA?