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to established frames of reference. Virtual computer-aided design models of the chosen UKA implant can then be positioned on the bone model in a truly patient-specific manner according to the implant manufacturer’s guidelines, and/or surgeon
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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Introduction Anterior cruciate ligament (ACL) tears are one of the most commonly sustained knee injuries, with an estimated incidence of 200 000 per year only in the USA ( 1 , 2 ). In young, active patients, ACL reconstruction (ACL-R) is the
Princess Grace Hospital, London, UK
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Princess Grace Hospital, London, UK
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Princess Grace Hospital, London, UK
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Princess Grace Hospital, London, UK
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that up to 20% of patients remain dissatisfied following TKA. 2 , 6 – 11 Accurate implant positioning, balanced flexion-extension gaps, proper ligament tensioning, and preservation of the periarticular soft tissue envelope are important surgeon
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to inter-patient variations in anatomical landmarks for referencing, subjective assessments of optimal jig positioning, and lack of objective intraoperative data on limb alignment. 15 , 18 , 19 Suboptimal pin placement into the tibial cortex, re
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serious problem for young patients, for whom an early revision is not only a major setback in the short term, but a serious threat to the long-term function of the limb. 2 Instability and stiffness are directly related to the position, size and
National Institute for Health Research Bristol Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, UK
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National Institute for Health Research Bristol Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, UK
North Bristol NHS Trust, Southmead Hospital, Bristol, UK
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Introduction The primary reasons that patients elect to undergo total knee replacement (TKR) are to gain improvements in pain and walking ability. 1 However, patients often have high expectations of the outcome of their TKR and want more
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surface. One study looked at the mediolateral position. Lee et al 22 undertook a single-surgeon retrospective review from an original cohort of 426 knees (310 patients) and a study cohort of 177 knees (143 patients) who had undergone a mixture of
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. 7 Similarly, small errors in osteotomy positioning can lead to local complications such as hinge fractures. 8 Assistive technology in the form of 3D printed patient-specific instrumentation (PSI) is one method of addressing the need for
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patients. Currently, approximately 5% of all TKAs are performed on an outpatient basis. 2 Lovald et al have reported that outpatient TKA (duration of hospital stay < 1 day) reduced costs by US$8,527, compared with patients admitted to the hospital for
