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deformities in 3D in the standing position with minimal exposure to radiation ( 7 , 8 ). The authors’ clinics, as most spine deformity centers worldwide, are equipped with low-dose EOS machines that expose patients to less radiation than conventional
Department of Orthopaedic Surgery, University of Cape Town, South Africa
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to position the implants so as to restore the pre-arthritic knee anatomy, 29 , 30 permitting motion more akin to the native knee. The pre-arthritic alignment is estimated pre-operatively with the use of proprietary software to create patient
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method demonstrated a mean error of 2.39° in 3D orientation, 1.05 mm in entry point position, 1.42° in inclination angle, and 1.64° in version angle ( 23 ). Hwang et al. investigated the impact of PSI on short-term outcomes. Patients were divided into
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X-ray image due to pelvic tilt following a lumbar arthrodesis. Fig. 3 Same implant and patient, different X-ray angle leading to different evaluation of cup orientation. (a) incorrect beam angle: cup too vertical and anteverted position
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a common cause of failure after TSA, leading to revision surgery in 0.8% of TSAs per year. 1 - 3 Alternatives to TSA are cup arthroplasty, hemi-arthroplasty (HA) and interpositional allografts with HA. For patients without a rotator cuff or with
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supine position inclined 30° towards the midline, away from the affected side, and the technique we described is designed for this position. Once the patient is in this position, the C-arm must be placed 30° to the contralateral side to see the frontal
Department of Orthopedic Surgery, Spine Unit, Centre Hospitalier de l’Université de Montréal (CHUM), Canada.
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-assisted technique Fluoroscopy is one of the limiting factors of this technique as it is imperative to obtain true anteroposterior (AP) and lateral views of the desired vertebra. The patient is positioned on a radiolucent table (or a Jackson frame) and accurate
Academic Department of Trauma and Orthopaedics, LGI, University of Leeds, UK
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NIHR Leeds Biomedical Research Center, Chapel Allerton Hospital, Leeds, UK
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) Patient in supine position, under fluoroscopic control and left buttock stab incision, surgeon tries to identify correct position of guide wire for sacral body 1 screw insertion; (C) Lateral fluoroscopic image demonstrating upper end of the first sacral
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knee osteoarthritis (OA) increases to between approximately 15% and 20% after an ACL tear, which represents a ten-fold increase. 6 It is suggested that more than 50% of patients that sustain an ACL injury will develop symptomatic OA in the
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the patient during CGA. These markers are fixed on the patient in an accurate standardised position relative to anatomical or technical landmarks. 8 These positions are dependent on the model used to compute the kinematics. The most used models in
