The porous-coated anatomic total hip prosthesis, inserted without cement. Results after five to seven years in a prospective study.

Heekin, R. David; Callaghan, John J.; Hopkinson, William; Savory, Carlton G.; Xenos, John S.

doi:10.2106/00004623-199301000-00011

Cited by 227 publications

(56 citation statements)

References 15 publications

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“…Nonetheless, failure rates were high if the porous coatings were not circumferential. [17][18][19] To avoid distal migration of wear debris, proximal circumferential porous coatings have become a standard feature for cementless stems. 4 In our study, the low incidence of osteolysis beyond the porous coating suggested that the circumferential porous coating of the Opti-Fix Hip was effective in lowering distal osteolysis and the migration of wear debris to the distal region.…”

Section: Discussionmentioning

confidence: 99%

Total Hip Arthroplasty Using Proximal Porous Coating Stem with Distal Sleeve: Mid-Term Outcome

Saito

Takahashi

Fujioka

et al. 2009

J Orthop Surg (Hong Kong)

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Purpose. To report mid-term results of total hip arthroplasty (THA) using the Opti-Fix Plus Hip System (Opti-Fix Hip), and to assess the correlations between peri-implant bone changes and the distal medullary occupancy rate. Methods. 11 men (13 hips) and 53 women (58 hips) aged 24 to 87 (mean, 61) years underwent THA using the Opti-Fix Hip, with a modular stem and a distal sleeve, and were followed up for a mean of 6.5 (range, 4.8-9.6) years. Clinical outcomes were evaluated using the Japanese Orthopaedic Association (JOA) hip score. Implant stability, bone changes around the implant, and the occupancy rate of the stem in the medullary space were examined radiologically. Bone changes around the implant were assessed based on the radiological evidence of a pedestal, osteolysis, stress shielding, and radiolucent lines. Results. The mean JOA score increased significantly Total hip arthroplasty using proximal porous coating stem with distal sleeve: mid-term outcome after surgery and was maintained at the latest followup. Around the acetabular and femoral components respectively, 38 and 58 hips had radiolucent lines, whereas one and 54 hips developed osteolysis. A pedestal appeared in 21 hips and grade-III or higher stress shielding in 30 hips. Two hips showed loosening of the acetabular components, but none in the femoral components. Osteolysis around the stem was frequently observed in hips with poor distal medullary occupancy. Conclusion. Clinical and radiological outcomes of the Opti-Fix Hip were favourable. The low incidence of osteolysis in the distal stem suggests that the proximal circumferential porous coating was effective. Minor osteolysis around the proximal stem was frequently observed, indicating early excessive wear of the polyethylene liner. Its high distal medullary occupancy rate could inhibit stem micromotion and aseptic loosening.

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Section: Discussionmentioning

confidence: 99%

Total Hip Arthroplasty Using Proximal Porous Coating Stem with Distal Sleeve: Mid-Term Outcome

Saito

Takahashi

Fujioka

et al. 2009

J Orthop Surg (Hong Kong)

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“…Todavia há que se considerar o adequado efeito de barreira da porosidade circunferencial proximal, que dificulta a migração de debris de polietileno ao longo da haste; o que potencialmente evita a osteólise do fêmur (Heekin et al, 1993;Hozack et al, 1996). Neste aspecto, optou-se pela termoaspersão uma vez que a camada porosa produzida é comprovadamente eficiente em propiciar adequada integração implante-osso, por ser a técnica mais indicada para implantes forjados em liga de Ti-6Al-4V e por não reduzir a resistência da prótese.…”

Section: Discussionunclassified

“…A granulometria do pó do material depositado revelou que o tamanho das partículas variou entre 80 µm e 100 µm em 99% das medições. Esse material foi aplicado por termoaspersão criando uma camada com poros de diâmetro médio de 88 µm variando de 32 a 203 µm, o que está de acordo com as dimensões referidas na literatura (Heekin et al, 1993;Stallforth e Blömer, 1994;Zheng et al, 2001).…”

Section: Discussionunclassified

Caracterização de uma haste femoral de Ti-6Al-4V não cimentada

Macedo¹,

Gália²,

Moreira³

et al. 2008

RBEB

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ResumoO objetivo deste estudo foi determinar a viabilidade de produção de uma prótese femoral de titânio garantindo a qualidade da matéria prima e as características das superfícies. Um protó-tipo foi criado pelo Método de Elementos Finitos em AutoCad ® 2000. A simulação dos esforços demonstrou uma tensão de von Mises 8,1 vezes menor que a tensão crítica para escoamento do material. Na determinação dos constituintes metálicos, obtevese: Fe = 0,06%, Al = 6,20%, V = 3,57%, O = 0,115%, N = 0,003%, H = 0,010%, e ausência de metais pesados. As propriedades elasto-plásticas da amostra tiveram valor médio de dureza de 4,45 (3,92 a 4,79) GPa e o módulo de elasticidade variou de 112,12 a 140,77 GPa (média = 134,33). O coeficiente de rugosidade médio (DP) no cone foi de 0,60 (0,03) µm; na região jateada de 12,2 (0,8) µm e na ponta de 0,41 (0,01) µm. Nos ensaios de fadiga e de corrosão não foram observadas alterações. A análi-se granulométrica do pó do material depositado demonstrou predominância de partículas médias (75 µm a 180 µm; 84%). A espessura da camada do material depositado apresentou valor médio de 52,7 µm (0 a 318 µm), porosidade média de 16% (variando de 3% a 41%), poros de diâmetro médio de 88,5 µm e profundidade média de 28,2 µm. A tensão (força por unidade de área) de adesão da camada porosa depositada revelou valores de 15 a 17 MPa. Em conclusão, os resultados dos testes e ensaios técnicos estão dentro das normas internacionalmente recomendadas e padronizadas para implantes metálicos em titânio estando essa prótese de acordo com os padrões internacionais de qualidade e segurança. Haste femoral não cimentada Macedo, C. A. S.; Galia, C. R.; Moreira, L. F.; Rosito, R.; Macedo, F. C. S.; Hübler, R. Palavras-chave: Extended Abstract IntroductionAccording to the literature (Blaha, 1998;Mulliken et al., 1996)

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“…A motion of 5 mm or more in vertical position was considered as subsidence. [7,8] The change of vertical distance from the tip of the greater trochanter to the inter teardrop line was measured on both preoperative and postoperative radiographs for assessment of lengthening. Heterotopic ossification was classified according to the system of Brooker et al [9] Percentage, average and standard deviation were used as descriptive statistics.…”

Section: Methodsmentioning

confidence: 99%

Metal-on-metal dysplasia cup total hip arthroplasty for hip osteoarthritis secondary to developmental dysplasia of the hip

Baki

Timurkaynak

Aydin

et al. 2014

Eklem Hastalik Cerrahisi

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Metal-on-metal dysplasia cup total hip arthroplasty for hip osteoarthritis secondary to developmental dysplasia of the hipGelişimsel kalça displazisine bağlı kalça osteoartriti için metal-metal displazi cup total kalça artroplastisi Developmental dysplasia of the hip (DDH) is the most common cause of secondary hip osteoarthritis. Dysplasia includes deformities such as hypoplastic acetabulum, narrow femoral intramedullary canal, leg-length discrepancy, shortened muscles around the hip, and abnormal neurovascular structures. All of these anatomical abnormalities require a challenging surgical operation in the treatment of dysplastic hips.In this study, we aimed to evaluate the clinical and radiological results of metal-on-metal dysplasia cup total hip arthroplasty (THA) for hip osteoarthritis secondary to DDH. İki hastada ameliyat sonrası siyatik sinir arazı gelişti. Bir hastada ameliyattan bir yıl sonra tekrarlayan çıkık meydana geldi. Ortalama cup inklinasyonu 46.5° idi (dağılım 42°-51°). Sekiz hastada heterotopik osifikasyon meydana geldi. Hiçbir hastanın asetabüler ve femoral komponenti anlamlı şekilde yer değiştirmedi veya çökmedi. Hiçbir implant revize edilmedi. Sonuç: Gelişimsel kalça displazisinde displazi cup TKA'nın erken dönem klinik ve radyolojik sonuçları tatmin edicidir.Anahtar sözcükler: Gelişimsel kalça displazisi; metal-metal kalça protezi; total kalça artroplastisi.Objectives: This study aims to evaluate the clinical and radiological results of metal-on-metal dysplasia cup total hip arthroplasty (THA) for hip osteoarthritis secondary to developmental dysplasia of the hip (DDH). Patients and methods: Between May 2009 and October 2011, THA was performed on 27 hips (7 Crowe type II, 9 Crowe type III, 11 Crowe type IV) of 22 patients (2 males, 20 females; mean age 43 years; range 25 to 63 years) with hip osteoarthritis secondary to DDH. All patients were evaluated clinically and radiographically. Results: Average follow-up period was 34.2 months (range 24-53 months). While mean Harris hip score (HHS) was 43 (range 30 to 72 points) preoperatively, it was 92 (range 87 to 98 points) at final follow-up. Two patients developed sciatic nerve palsy postoperatively. Recurrent dislocation occurred in one patient one year after the operation. Mean cup inclination was 45.6° (range 42°-51°). Heterotopic ossification developed in eight patients. No patient's acetabular and femoral component migrated or subsided significantly. None of the implants was revised. Conclusion: Early clinical and radiological results of metalon-metal dysplasia cup THA in DDH are satisfactory.Keywords: Developmental dysplasia of the hip; metal-on-metal hip prosthesis; total hip arthroplasty.

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The porous-coated anatomic total hip prosthesis, inserted without cement. Results after five to seven years in a prospective study.

Cited by 227 publications

References 15 publications

Total Hip Arthroplasty Using Proximal Porous Coating Stem with Distal Sleeve: Mid-Term Outcome

Total Hip Arthroplasty Using Proximal Porous Coating Stem with Distal Sleeve: Mid-Term Outcome

Caracterização de uma haste femoral de Ti-6Al-4V não cimentada

Metal-on-metal dysplasia cup total hip arthroplasty for hip osteoarthritis secondary to developmental dysplasia of the hip

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