Structural and cellular assessment of bone quality of proximal femur

Dorr, Lawrence D.; Faugère, Marie-Claude; Mackel, Audley M.; Gruen, Thomas A.; Bognar, Bryan A.; Malluche, Hartmut H.

doi:10.1016/8756-3282(93)90146-2

Cited by 743 publications

(518 citation statements)

References 5 publications

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“…Inclusion criteria were 40–70 years of age with bone stock suitable for uncemented hip arthroplasty, i.e. femur type Dorr A or B (Dorr et al 1993), and femoral anatomy allowing implantation of both stem types, i.e. no hip dysplasia and no previous hip surgery on the affected side.…”

Section: Methodsmentioning

confidence: 99%

Lower periprosthetic bone loss and good fixation of an ultra-short stem compared to a conventional stem in uncemented total hip arthroplasty

Salemyr¹,

Muren²,

Ahl³

et al. 2015

Acta Orthopaedica

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Background and purpose — We hypothesized that an ultra-short stem would load the proximal femur in a more physiological way and could therefore reduce the adaptive periprosthetic bone loss known as stress shielding.Patients and methods — 51 patients with primary hip osteoarthritis were randomized to total hip arthroplasty (THA) with either an ultra-short stem or a conventional tapered stem. The primary endpoint was change in periprosthetic bone mineral density (BMD), measured with dual-energy x-ray absorptiometry (DXA), in Gruen zones 1 and 7, two years after surgery. Secondary endpoints were change in periprosthetic BMD in the entire periprosthetic region, i.e. Gruen zones 1 through 7, stem migration measured with radiostereometric analysis (RSA), and function measured with self-administered functional scores.Results — The periprosthetic decrease in BMD was statistically significantly lower with the ultra-short stem. In Gruen zone 1, the mean difference was 18% (95% CI: −27% to −10%). In zone 7, the difference was 5% (CI: −12% to −3%) and for Gruen zones 1–7 the difference was also 5% (CI: −9% to −2%). During the first 6 weeks postoperatively, the ultra-short stems migrated 0.77 mm more on average than the conventional stems. 3 months after surgery, no further migration was seen. The functional scores improved during the study and were similar in the 2 groups.Interpretation — Up to 2 years after total hip arthroplasty, compared to the conventional tapered stem the ultra-short uncemented anatomical stem induced lower periprosthetic bone loss and had equally excellent stem fixation and clinical outcome.

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Section: Methodsmentioning

confidence: 99%

Lower periprosthetic bone loss and good fixation of an ultra-short stem compared to a conventional stem in uncemented total hip arthroplasty

Salemyr¹,

Muren²,

Ahl³

et al. 2015

Acta Orthopaedica

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“…For the canal index, we used the method described by Dorr et al [11], measuring endosteal size at a point 10 cm below the lesser trochanter and at the midtrochanteric line. The mean canal index was 0.55 (range, 0.36-0.68).…”

Section: Methodsmentioning

confidence: 99%

High Incidence of Migration with Poor Initial Fixation of the Accolade® Stem

White

Carsen

Rasuli

et al. 2012

Clinical Orthopaedics &Amp; Related Research

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Background Numerous cementless femoral stem design variations are in clinical use. Because initial implant instability and micromotion are associated with aseptic loosening of the femoral component, migration analysis provides an early assessment of implant survivorship. Questions/purposes We determined the (1) migration pattern of the Accolade 1 cementless femoral stem; (2) clinical factors predisposing to stem migration; (3) selfreported patient outcomes; and (4) our current rate of aseptic stem loosening. Methods We retrospectively analyzed 81 femoral stems for aseptic migration using Ein-Bild-Roentgen-Analysefemoral component analysis. Postoperatively, patients completed the WOMAC and SF-12 questionnaires. We assessed radiographic factors potentially associated with subsidence: indices of bone shape and quality, canal fill of the implant, and radiographic signs of loosening. Minimum followup was 24 months (mean, 29 months; range, 24-48 months). Results The average subsidence at 24 months was 1.3 mm (range, 0-1.5 mm). In the first 2 years, 36% of stems subsided more than 1.5 mm. Large stem size was associated with subsidence. Radiolucent lines ([ 1.5 mm in three zones) were present in 10% of stems and associated with lower questionnaire scores. The 5-year survivorship for aseptic loosening of the 367 stems was 97% with revision as end point and 95% for radiographic failure.

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“…Chi square test was used to compare the categorical data (gender, bone type [9], patient selfassessment score, and postoperative level of activity) in the two groups. A probability value of p B 0.05 was considered significant.…”

Section: Methodsmentioning

confidence: 99%

Metal-on-Metal Hip Arthroplasty Does Equally Well in Osteonecrosis and Osteoarthritis

Dastane

Long

Wan

et al. 2008

Clinical Orthopaedics &Amp; Related Research

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Many previous reports suggest total hip arthroplasty performs suboptimally in young patients with osteonecrosis. We retrospectively compared the performance of metal-on-metal articulation in a select group of 107 patients with 112 hips (98 uncemented and 14 cemented stems) 60 years of age or younger with either osteonecrosis (27 patients, 30 hips) or primary osteoarthritis (80 patients, 82 hips). We evaluated all patients with patient-generated Harris hip score forms and serial radiographs. Five mechanical complications were caused by impingement, two with pain, two dislocations, and one liner dissociation. At a minimum followup of 2.2 years (mean, 5.5 years; range, 2.2-11.7 years), we observed no osteolysis or aseptic loosening in the osteonecrosis group, whereas one osteoarthritic hip had cup revision for loosening (none showed evidence of osteolysis). None of the stems were loose. Patients with osteonecrosis or primary osteoarthritis were similar in clinical and radiographic performance. The patients with metal-on-metal hip arthroplasty for osteonecrosis had no revisions for aseptic loosening, but did have one liner change in a cup for painful impingement.

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Structural and cellular assessment of bone quality of proximal femur

Cited by 743 publications

References 5 publications

Lower periprosthetic bone loss and good fixation of an ultra-short stem compared to a conventional stem in uncemented total hip arthroplasty

Lower periprosthetic bone loss and good fixation of an ultra-short stem compared to a conventional stem in uncemented total hip arthroplasty

High Incidence of Migration with Poor Initial Fixation of the Accolade® Stem

Metal-on-Metal Hip Arthroplasty Does Equally Well in Osteonecrosis and Osteoarthritis

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