Feature Question

(OBQ10-187) Which of the following is true regarding the conversion of hip arthrodesis to total hip arthroplasty? REVIEW TOPIC

1. Implant survivorship is greater than 95% at 20 years following conversion to arthroplasty
2. Conversion to arthroplasty should not be performed if arthrodesis is more than 15 years old
3. Function of gluteus medius is predictive of ambulatory status
4. Rate of complication is equivalent to primary total hip arthroplasty
5. Incidence of nerve palsy is comparable to primary total hip arthroplasty