THR Australian Joint Registry

 

2009 / Revision Rates 8 year

 

Prosthesis Type All Diagnosis 7 year

 

Unipolar Monoblock 6.8%

Unipolar Modular 6.8%

Bipolar Hemi 4.2%

 

Cemented THR 3.8%

Cementless THR 4.4%

Hybrid THR 3.9%

 

Total Resurfacing 5.4%

Thrust Plate 3.0%

 

Revision for OA 8 year

 

Conventional THR  4.0%

Total Resurfacing   5.3%

 

Partial Hip Replacement

Cemented better than cementless in all categories

 

Hemiarthroplasty

 

1.  > 85 

- unipolar monoblock 3.4% 7 years

- unipolar modular 2.1% 5 years

- bipolar 2.9% 7 year

 

2.  75-84

- unipolar monoblock 8.5% 9 years

- unipolar modular 5.5% 7 years

- bipolar 3.5% 7 years

 

3.  < 75 

- unipolar monoblock 17.5% 7 year

- unipolar modular 13.4% 7 year

- bipolar 6% 7 year revision rate

 

Primary Conventional THR

 

By Age

 

< 55   4.9%

55-64  4.6%

65-74  3.6%

>75     3.7%

 

By Gender

 

Female  3.8%

Male     4.3%

 

By Fixation

 

Cemented    3.9%

Cementless  4.4%

Hybrid         3.4%

 

By Age & Fixation

 

< 55      hybrid (4.6) < cementless (4.8)

55-64     hybrid (3.6) < cementless (4.7)  < cemented (6.1)

65-74     hybrid (3.2) < cemented (3.8) < cementless (3.9)

> 75      cemented (3.1) < Hybrid (3.3) < cementless (4.2)

 

By Diagnosis

 

AVN 5.1%

DDH 3.5%

NOF  5.2%

OA    4.0%

RA    5.4%

 

By Bearing Surface

 

Ceramic / Ceramic  3.9%

Metal / Poly             3.2%

Ceramic / Poly         4.1%

Metal / Metal           7.7% (Head sizes > 28mm)

 

By Head Size

 

Ceramic / Ceramic

</= 28          4.6%

> 28              3.5%

 

Metal / Poly

>/= 28          3.9%

> 28              3.0%

 

By Cemented THR

 

MS30/Low Profile cup     1.0%

Exeter/Exeter                3.2%

Exeter / Contemporary   6.6%

Spectron / Reflection      6.9%

 

By Cementless THR

 

Securefit Plus / Trident  2.8%

Mallory Head                5.5%

Synergy/Reflection        3.8%

ABGII/ABGII                 5.6%

 

By Hybrid THR

 

Definition / Vitalock        1.5

Exeter/Vitalock              3.6%

Spectron/Reflection        5.4%

 

Identified as higher than expected

 

Corail / ASR 

 

Hip Resurfacing

 

13 300 procedures

 

Best outcome

- male < 65 with OA

- able to get > 50 mm head size

- 3.9% 9 year

 

Revision rate

 

Cumulative revision rate

- 7.2% 9 years for OA

 

Birmingham Resurfacing

- 6.2% 9 year

 

Reasons for revision

- fracture 36%

- loosening 33%

- metal sensitivity 7%

 

Revision by diagnosis 7 years

- OA 5.8%

- DDH 14%

- AVN 6%

 

Revision by prosthesis

- BHR 96.5% 5 year

 

Revision by age 7 years

- < 55     5.6%

- 55 - 64  5.8%

- > 65     7.3%

 

Revision by sex 7 years

- male 4.5%

- female 9.3%

 

Revision by head size 7 years

- < 44mm:    13.8%

- 45 - 49mm: 8.8%

- 50 - 54mm: 3.7%

- > 55mm:     2.2%

 

Revision

 

Type

 

Femoral only 21.5%

Acetabular only 37.1%

Combined         35.8%

 

Reason

 

Loosening 45.7%

Dislocation           14.8%

Lysis                    10.1%

Fracture                9.2%

Infection               9.1%

Wear Acetabulum   3.3%

Pain                      2.1%

 

Re-revision Rate

 

Minor (head, liner)   19.4% 5 year

Major Partial            14.1% 5 year

Major Total               8.2%   3 year