Direct plain radiographic methods versus EBRA-Digital for measuring implant migration after total hip arthroplasty

Phillips, Nicholas J.; Stockley, I; Wilkinson, JM

doi:10.1054/arth.2002.34529

Cited by 54 publications

(44 citation statements)

References 26 publications

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“…We measured migration by the EBRA method, which can be regarded as the most accurate measuring system using conventional radiographs. Different authors have found an accuracy of between ± 0.82 and 1.0 mm (Phillips et al 2002), or between ± 0.27 and 0.39 mm compared to RSA (Ilchmann et al 1992). The migration (in mm) is depicted on the y-axis, and the results for fixed and loosened cups after 2 and 10 years are shown.…”

Section: Discussionmentioning

confidence: 99%

“…EBRA accepts only pelvic radiographs within a range of 9° tilting in the ydirection and 6° in the x-direction. Using these parameters, a measurement accuracy of better than ± 1 mm has been reported (Ilchmann et al 1992, Ilchmann 1997, Phillips et al 2002. Thus, implant migration was defined as a change in implant position of more than 1 mm in the horizontal or vertical direction.…”

Section: Ein-bild-roentgen-analyse (Ebra)mentioning

confidence: 99%

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High long-term loosening rate of conical screw cups

et al. 2006

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Background Acetabular screw cups seem to give high primary stability. We analyzed the migration and loosening behavior of a first-generation screw cup in a longterm follow-up.Patients and methods We examined 92 uncemented titanium alloy conical screw cups prospectively. Implant migration was assessed with a digital high-precision method (EBRA) with an accuracy of 1.0 mm.Results After mean 11 (0.5-18) years, 87 patients were available for examination and 5 patients had died. 32 implants had been revised and 7 cases showed radiographic evidence of loosening. The 10-year survival rate was 71%. Migration of more than 1 mm occurred in 53 hips. Implant survival was strongly associated with an annual migration of greater than 0.2 mm.Interpretation The long-term behavior of this cup is not satisfactory. In spite of extraordinarily high primary implant stability, secondary osseointegration of this cup often fails. The annual migration rate represents a valid parameter for prediction of implant survival.

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Section: Discussionmentioning

confidence: 99%

Section: Ein-bild-roentgen-analyse (Ebra)mentioning

confidence: 99%

High long-term loosening rate of conical screw cups

et al. 2006

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“…After stem implantation, there is a redistribution of forces, with relief of the bone in the region of the stem. This relief leads to bone remodelling or bone loss [9,15,16,17,21]. Atrophy, which often takes place in the proximal part of the femur when prosthetic stems are anchored distally, is an expression of this unphysiological transmission of forces and bone adaptation.…”

Section: Introductionmentioning

confidence: 99%

Proximal cement fixation in total hip arthroplasty—first results with a new stem design

Einsiedel

Gebhard

Bregolato

et al. 2007

International Orthopaedics (SICO

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“…Although we agree with the conclusion drawn from their observations, we ask clarification on several points in their methods. The authors mention that they used radiographs to measure subsidence and migration postoperatively, but as radiographs are prone to errors due to patient positioning and radiograph centring [2], were any specific steps taken to ensure minimal errors, and how was radiograph uniformity ensured during follow-up? Furthermore, all measurements were done manually by an orthopaedic surgeon.…”

mentioning

confidence: 99%

“…Was any specific software used for making these measurements? There are several software packages available, such as Ein-Bild-Roentgen-Analyse (EBRA) that have been validated previously [2,3]. These are available free and are easy to use.…”

mentioning

confidence: 99%