The Furlong hydroxyapatite-coated femoral prosthesis

Loupasis, G.; Hyde, I.; Morris, E. W.

doi:10.1007/s004020050212

Cited by 20 publications

(16 citation statements)

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“…The promising results produced by HA-coated femoral components have been repeated in the younger patient. Loupasis et al [15], in a six year follow-up study of 45 patients under the age of 50, reported no revision for aseptic loosening or evidence of stem loosening. Capello et al [3] reported a low stem failure rate of 2% in patients below 45 years of age when using a proximally HA-coated implant with a minimum follow-up of ten years.…”

Section: Discussionmentioning

confidence: 99%

“…The definition of young in patient outcome studies of hip arthroplasty in the literature varies, but in this contex, young generally refers to patients younger than 50 years, and there are few reports of hip prosthesis in patients younger than 30 years of age at the time of implantation [6]. The use of a hydroxyapatite (HA)-coated cementless stem in THR is well established [15], and our clincal experiences with a HA-coated stem are, in general, very good [21]. The aim of this study was, therefore, to evaluate the long-term clinical and radiological outcomes of a HA-coated femoral stem implanted in young adults.…”

Section: Introductionmentioning

confidence: 99%

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Hip arthroplasty in patients younger than 30 years: excellent ten to 16-year follow-up results with a HA-coated stem

Wangen

Lereim

Holm

et al. 2007

International Orthopaedics (SICO

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It is well accepted that youth and high activity levels are among the factors that increase the risk of mechanical failure of total hip prostheses. However, there are few reports of long-term results in very young patients. In this study, we evaluated the results of total 49 hip replacements (THRs) using an uncemented total hip prosthesis in 44 patients (28 females) who were 30 years or younger (range: 15-30 years). The diagnosis was ostearthritis due to congenital dislocations in 28 patients, with the remaining patients having diagnoses of sequelae of fracture, infection, Calve-Legg-Perthes disease, avascular necrosis, chondrodystrophia and epiphyseal dysplasia. In all cases we used an uncemented straight stem fully coated with hydroxyapatite (HA). In 36 cases we used a hemispherical cup inserted with press fit, and in seven cases we used a hemispherical screw cup. The patients were evaluated ten to 16 years (mean: 13 years) after the operation by radiographic and clinical examinations, including the Harris Hip, WOMAC and EuroQol-5D scores. In a sub-group of nine patients with a unilateral prosthesis, the muscle strength of the quadriceps and hamstrings was tested using a Cybex 6000. None of the stems were revised at the follow-up examination, and all were classified as well integrated, with no signs of radiological loosening. Twentyfour hips had revision of the acetabular component due to mechanical failure. The Harris Hip score was, on average, 88 (range: 62-100), the WOMAC score 80 (range: 37-100) and the EuroQol score 0.68 (range: −0.14-1). Isokinetic muscle strength testing showed that seven of the nine tested patients were weaker on the operated side. In conclusion, we found mechanical failures at the acetabular side, but excellent results with a fully HA-coated femoral stem, with no revisions after ten to 16 years.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hip arthroplasty in patients younger than 30 years: excellent ten to 16-year follow-up results with a HA-coated stem

Wangen

Lereim

Holm

et al. 2007

International Orthopaedics (SICO

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“…While many surgeons presume proximally coated stems, or cemented stems, have a lower incidence of thigh pain than fully coated stems, this remains controversial [1,2,17,25,28,30,38]. Most authors recognize the reported incidence of thigh pain will be influenced by the way a patient is asked about its presence, a point best controlled with a prospective randomized blinded clinical trial.…”

Section: Introductionmentioning

confidence: 99%

Proximally Versus Fully Porous-coated Femoral Stems: A Multicenter Randomized Trial

MacDonald

Rosenzweig

Guerin

et al. 2010

Clinical Orthopaedics &Amp; Related Research

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There are two broad-based categories of cementless femoral component designs: proximally porouscoated and fully porous-coated. While both have been widely used, there remains debate regarding differences in clinical outcome scores, relative incidence of thigh pain, and development of stress shielding. We investigated these variables in a multicenter prospective randomized blinded clinical trial of 388 patients from three centers: 198 patients had a proximally porous-coated tapered cementless femoral component and 190 patients had a fully porous-coated cementless femoral component. A minimum followup of 2 years (mean, 6.7 years; range, 2.0-8.65 years) was available in 367 of the 388 patients (95%).

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“…[7][8][9] An HAC-coated implant also has the potential for adaptive stress transfer at the prosthesis-bone interface, and good early clinical results have been reported following the use of HACcoated implants. 5,[10][11][12][13] Primary stability is important with cementless THR because a reduction in micromovement improves osseo-integration between the implant and bone and reduces migration. Such primary stability is provided by the design features, of which there is great variability in contemporary cementless stems.…”

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confidence: 99%

The migration patterns of two versions of the Furlong cementless femoral stem

Simpson

Kendrick

Hughes

et al. 2010

The Journal of Bone and Joint Surgery. British volume

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We have evaluated the difference in the migration patterns over two years of two cementless stems in a randomised, controlled trial using radiostereophotogrammetric analysis (RSA). The implants studied were the Furlong HAC stem, which has good long-term results and the Furlong Active stem, which is a modified version of the former designed to minimise stress concentrations between the implant and bone, and thus to improve fixation. A total of 23 Furlong HAC and 20 Furlong Active stems were implanted in 43 patients. RSA examinations were carried out immediately post-operatively and at six, 12 and 24 months post-operatively. The subsidence during the first year in the Furlong HAC stem, was approximately one-third that of the Furlong Active stem, the measured mean subsidence of the femoral head at six months being 0.27 mm (95% confidence interval (CI) 0.03 to 0.51) and 0.99 mm (95% CI 0.38 to 1.60), respectively (p = 0.03). One Active stem continued to subside during the second year. All hips, regardless of the type of stem were clinically successful as judged by the Oxford hip score and a derived pain score without any distinction between the two types of stem. The initial stability of the Furlong Active stem was not as good as the established stem which might compromise osseo-integration to the detriment of long-term success. The changes in the geometry of the stem, to minimise stress have affected the attainment of initial stability.

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The Furlong hydroxyapatite-coated femoral prosthesis

Cited by 20 publications

References 0 publications

Hip arthroplasty in patients younger than 30 years: excellent ten to 16-year follow-up results with a HA-coated stem

Hip arthroplasty in patients younger than 30 years: excellent ten to 16-year follow-up results with a HA-coated stem

Proximally Versus Fully Porous-coated Femoral Stems: A Multicenter Randomized Trial

The migration patterns of two versions of the Furlong cementless femoral stem

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