Outcome of primary resurfacing hip replacement: evaluation of risk factors for early revision

Figures & data

Figure 1.  Cumulative percent revision of primary conventional total and total resurfacing hip replacement (primary diagnosis: OA, excluding infection).

Figure 2.  Cumulative percent revision of primary total resurfacing hip replacement, by primary diagnosis.

Figure 3.  Cumulative per cent revision of primary total resurfacing hip replacement, by age (primary diagnosis: OA, excluding infection).

Figure 4.  Cumulative per cent revision of primary total resurfacing hip replacement, by sex (primary diagnosis: OA, excluding infection).

Figure 5.  Cumulative per cent revision of primary total resurfacing hip replacement, by sex and femoral component head size (primary diagnosis: OA, excluding infection).

Table 1.  Annual cumulative per cent revision (with 95% CI) of primary total resurfacing hip replacement

Head component	Acetabular component	n (total)	1 year	3 years	5 years	7 years	8 years
ASR	ASR	1,073	3.6 (2.6–4.9)	6.0 (4.6–7.8)	8.7 (6.6–12)
Adept	Adept	292	0.7 (0.2–2.7)	1.9 (0.7–5.1)
BHR	BHR	8,427	1.5 (1.3–1.8)	2.5 (2.2–2.9)	3.6 (3.2–4.1)	4.8 (4.2–5.6)	5.0 (4.3–5.8)
Bionik	Bionik	119	4.3 (1.6–11)	6.7 (2.6–16.4)
Conserve Plus	Conserve Plus	62	3.2 (0.8–12)	5.1 (1.7–15)	9.7 (4.1–22)	9.7 (4.1–22)
Cormet	Cormet	192	1.6 (0.5–4.8)	3.8 (1.8–7.9)	5.3 (2.8–10)	6.0 (7.1–34)
Cormet 2000 HAP	Cormet	95	6.3 (2.9–14)	8.4 (4.3–16)	9.5 (5.0–17)
Cormet HAP BiCoat	Cormet	287	2.8 (1.3–5.8)	5.0 (2.6–9.5)
Durom	Durom	767	3.0 (2.0–4.5)	4.7 (3.4–6.7)	6.7 (4.7–9.7)
Icon	Icon	96	1.1 (0.2–7.9)	2.5 (0.6–9.6)
Mitch TRH	Mitch TRH	534	1.4 (0.6–3.1)
Recap	Recap	137	5.0 (2.3–11)	7.6 (3.8–15)

Note: 2 resurfacing hip procedures using only a Conserve resurfacing head and no acetabular component have been excluded.

Table 2.  Type of revision of primary total resurfacing hip replacement

Type of revision	n	%
Femoral only	252	58
THR (femoral/acetabular)	135	31
Acetabular only	37	9
Cement spacer	9	2
Removal of prosthesis	4	1
Total	437	100

Table 3.  Reason for revision of primary total resurfacing hip replacement

Revision diagnosis	n	%
Fracture	172	39
Loosening/lysis	128	29
Infection	39	9
Metal sensitivity	28	6
Pain	23	5
Dislocation of prosthesis	14	3
Other	33	8
Total	437	100