Academic Medical Centre (AMC), Amsterdam, Netherlands
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around the greater trochanter and calcar region. 12 , 13 Other types of implants, such as short and anatomical stem designs, are based on a more proximal anchoring principle. Short stems in total hip arthroplasty were designed to restrict the physical
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Connolly Hospital, Orthopaedic Department, Dublin, Ireland
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a line-to-line broaching technique often referred as the ‘French paradox’ with a cement mantle of 1 mm or less. Type 4 are anatomical stems and have mixed features when compared to the other types and have a consistent cement mantle of 2 mm along the
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surrounding the stem must be present, this class of implants follows a different approach. This technique is also referred to as the ‘French paradox’ (see above under cementation technique) ( 2 , 5 ). The fourth type includes curved and anatomical stems
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cementless hydroxyapatite-coated anatomical stem in the thumb metacarpal. Longer-term follow-up studies are needed to evaluate if these results are maintained over time. Figure 1 Resection of the volar beak at the base of the thumb metacarpal
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a pure titanium core with a titanium alloy mesh; the femoral component was a smooth and collared titanium cemented stem in 14 patients, a cementless anatomical stem with a trochanteric wing in 26 cases and a cementless straight tapered-wedge stem in
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(Ceramconcept) – 30 hips Schiffner et al . (10) 116 116 69.2 (50-91) 40 76 Primary OA: 116 hips (39 patients with flexion contracture) Uncemented Allofit pressfit cup (Zimmer): 116 hips Fitmore short stem (Zimmer) SPP II anatomical stem
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University of Leeds, Leeds, UK
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University of Leeds, Leeds, UK
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Sayed-Noor A Sköldenberg O . Substantially higher prevalence of postoperative peri-prosthetic fractures in octogenarians with hip fractures operated with a cemented, polished tapered stem rather than an anatomic stem . Acta Orthop 2016
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and an ultra-short non-anatomic stem. 59 In both studies, there were no significant differences between the two groups in terms of validated functional outcomes scores, incidence of thigh pain, revision rates, aseptic loosening rate and
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Division of Orthopaedics and Trauma Surgery, Department of Surgery, Geneva University Hospitals, Geneva, Switzerland
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muscle fibres to perform abduction. 99 The original design with a 155-degree non-anatomic stem further enhanced the deltoid lever arm by distalization of the humerus. 100 The anterior deltoid becomes consecutively an important contributor to flexion and