Table 1 Patients’ characteristics

1

22

1

Frame with wheels

Loose right total hip replacement with massive bony defects in the acetabulum

2

25

2

Walking stick and crutches

Loosening of revision hip arthroplasty

3

32

2

Bilateral underarm crutches

Pelvic discontinuity following revision left hip repl.

4

30

3

Frame

Dislocated revision right total hip with a constrained liner. Periprosthetic type C fracture, managed by open reduction internal fixation with distal femoral locking plate

5

31

2

2 crutches

Massive acetabular defect and loose hip replacement. High CRP with negative aspirate

6

32

3

Wheelchair

Failed MoM implant, subsequent loosening and infection of the THR

7

26

Multi^b

2 crutches

Multiple hip operations, severe mechanical symptoms

8

48

2

Wheelchair

Failed replacement with acetabular migration

9

29

2

None

Failure of MoP hip replacement with superior migration of the hip

10

23

2

Wheelchair

Loose R hip replacement with inflammatory pseudotumor

11

37

Multi^b

Walking crutches

Loose left long stem, loose acetabulum

12

26

1

Bilateral crutches

Loose R acetabulum MoP replacement with subluxation

13

23

1

None

MoM hip resurfacing with high metal ions levels and bone and soft tissue damage

14

27

2

Bilateral crutches

Failed MoP L hip with superior migration of cup and stem, pelvic discontinuity

15

26

0

Walking crutches

Severe joint degradation. Presence of massive fractured bone protrusion below acetabulum

16

26

2

Wheelchair

Failed implant and infection

17

30

2

Frame with wheels

Infection and pelvic discontinuity

18

22

1

Bilateral crutches

Acetabular cup failure following primary R THA

19

26

0

None

Hip Osteoarthritis secondary to acetabular fracture

20

23

2

Walking trolley

Catastrophic failure of revision right hip replacement

21

30

4

Wheelchair

Loosening and infection

22

27

1

Walking stick

Loosening of acetabular component and significant osteolysis

23

22

1

Walking stick

MoM modular hip replacement with pseudotumor

24

26

Multi^b

Frame

History of recurrent dislocation and infection

25

25

Multi^b

Wheelchair

Multiple severe infections and metallosis from THA