Improved Survivorship of Hybrid Metal-on-Metal Hip Resurfacing with Second-Generation Techniques for Crowe-I and II Developmental Dysplasia of the Hip

Amstutz, Harlan C.; Duff, Michel J. Le; Harvey, Norah; Hoberg, Maik

doi:10.2106/jbjs.h.00711

Cited by 28 publications

(10 citation statements)

References 27 publications

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“…Several treatments have been used for treating hip arthritis secondary to a dysplastic hip [8][9][10], but few studies consider the Wagner stem as a possibility. Professor H. Wagner designed this stem in 1990 for patients with proximal femur deformities.…”

Section: Discussionmentioning

confidence: 99%

Total hip replacement with an uncemented Wagner cone stem for patients with congenital hip dysplasia

Torres-Claramunt

Marqués

León

et al. 2011

International Orthopaedics (SICOT)

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Purpose The purpose of this study was to review retrospectively the cases operated upon in our department in recent years with a Wagner stem and a small socket in cases of Crowe I or II dysplastic hips. Methods We conducted a retrospective clinical radiological review of 30 hips diagnosed with hip dysplasia Crowe I or II treated in our centre between 2002 and 2008. All of them were treated with a Wagner cone stem and a small Trilogy acetabulum (Zimmer ®). Results There were 15 men and 11 women with 13 left and 17 right femurs. Mean follow-up was 43.44 months (range 14-87). Eight patients were Crowe I type and 22 were Crowe II type. Merlé d'Aubigne score pre-operatively was 12.23 and at the last follow-up was 15.54. Mean leg length inequality was 1.79 and after surgery it was 0.69 cm. Complications included three infection and three dislocations (two of them in the same patient). Conclusions The use of a Wagner stem is a good option to correct the different deformities in the proximal femur in these cases. A small socket allows a correct relocation of the acetabulum in a dysplastic socket with good bone coverage.

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Section: Discussionmentioning

confidence: 99%

Total hip replacement with an uncemented Wagner cone stem for patients with congenital hip dysplasia

Torres-Claramunt

Marqués

León

et al. 2011

International Orthopaedics (SICOT)

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“…Amstutz found more than 10% failure in patients with mild dysplasia using a conventional acetabular component at 6 years (29). With improved femoral preparation and cementing survival improved to 94% at 5 years and there was no acetabular loosening (30). McMinn reported 95.2% survival in Crowe 2 and 3 patients at 6-9.6 years using a dysplasia acetabular component with no acetabular loosening (31).…”

Section: Resultsmentioning

confidence: 99%

Minimum 5-Year Follow-Up after Cormet Hip Resurfacing. A Single Surgeon Series of 234 Hips

et al. 2012

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The performance of the Cormet hip resurfacing device was evaluated after a minimum of 5 years in 234 hips. The mean age of the patients was 54 years; there were 135 men and 80 women. The primary diagnosis was osteoarthritis in 78% of the patients. Outcome measures were the Harris Hip Score and implant survival. The overall survival rate was 94% with 12 revisions in women and 3 in men. There were 7 femoral and 5 acetabular failures and two revisions for groin pain. Cumulative survival rate in men and women was 98% and 89%, in patients with a femoral component larger than 44 mm and smaller than 44 mm 97% and 89% respectively. Patients with primary osteoarthritis had a 95% cumulative survival rate at 5 years. The risk of failure was 6.4 times higher in women than in men. Our results suggest that hip resurfacing with the Cormet device is an acceptable alternative for active patients with hip arthritis, but patient selection is crucial for good long-term results.

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“…With a variety of designs and both positive [3][4][5] and negative reports [6][7][8][9][10] now emerging with regard to MOM in both total hip arthroplasty (THA) and resurfacing arthroplasty (RSA), many studies have focused on issues regarding metal alloys, cup design, surgical positioning [11][12][13] and effects of "edge loading" [7,9,[14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Biomechanical Alignment of Main Wear-Pattern on MOM Total Hip Replacement

Paul

Medina²,

Burgett-Moreno³

et al. 2015

ReconRev

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In the majority of retrievals, femoral heads and cups are sent for analysis with no designation as to positioning in-vivo. In addition, when patients retain the femoral prosthesis, evidence of neck impingement damage is lost. In this case report we studied head and cup wear-patterns and stripe damage in a novel case that included a large diameter metal-on-metal THA that was retrieved with the head still fused to the stem. This provided anatomical positioning of head wear-pattern and stripe damage as represented by the orientation of the femoral stem in radiographic images. We investigated (1) size, shape and location of head and cup wear-patterns, (2) cup-to-stem impingement damage, and (3) head stripe-wear. The head wear-pattern was elliptical in shape, 40mm diameter with area covering 2200 sq.mm. Its hemispherical ratio was 56% with aspect ratio 1.2 and typical of large-diameter MOM retrievals. Wear-pattern extended from 12° above superior head-margin to approximately 40° inferior to polar axis. Centroidal vector in coronal plane was 13° posterior to polar axis and in transverse plane was 19° superior to polar axis. These vector data corresponded well with biomechanical predictions of resultant load axes in gait studies. Stripe damage was identified on the head, and the cup rim could thereby be aligned to verify neck impingement and also head subluxation mechanisms. Cup wear-pattern was not centrally contained, indicating this patient had experienced repetitive edge-wear during gait. Thinning of the cup rim by 350- 400µm indicated that posterior impingement with repetitive anterior subluxation of the head had created this edge-wear.

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Improved Survivorship of Hybrid Metal-on-Metal Hip Resurfacing with Second-Generation Techniques for Crowe-I and II Developmental Dysplasia of the Hip

Cited by 28 publications

References 27 publications

Total hip replacement with an uncemented Wagner cone stem for patients with congenital hip dysplasia

Total hip replacement with an uncemented Wagner cone stem for patients with congenital hip dysplasia

Minimum 5-Year Follow-Up after Cormet Hip Resurfacing. A Single Surgeon Series of 234 Hips

Biomechanical Alignment of Main Wear-Pattern on MOM Total Hip Replacement

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