Total Hip Arthroplasty (THR)

Question 1

where can pain in the hip radiate to?

Answer 1

groin
knee (due to obturator nerve supplying both joints)
buttock

Question 2

how long do THR last?

Answer 2

10-15 years

Question 3

what factors must be taken into account when deciding whether a patient must have a THR

Answer 3

pain and disability of the patient

if conservative measures have failed

Question 4

conservative management of hip pathology

Answer 4

analgesics
physiotherapy
stick
weight reduction
modification of activities

Question 5

complications of THR

Answer 5

infection
nerve injury
clots
revisions have poorer outcomes

Question 6

what is the most common material used in THR

Answer 6

metal-on-polyethene e.g. hard on soft pairing

hard material is the femoral head and polyethene forms the acetabular component

Question 7

what other materials can be used together?

Answer 7

metal-on-polyethene
ceramic-on-polyethene
ceramic-on-ceramic

Question 8

what is metal-on-metal THR associated with?

Answer 8

high rates of pseudotumour so is no longer used

Question 9

which materials do not work together for THR?

Answer 9

polyethene-on-polyethene

ceramic and metal