The John Insall Award: No Functional Benefit After Unicompartmental Knee Arthroplasty Performed With Patient-specific Instrumentation: A Randomized Trial

Clinical Orthopaedics and Related Research
Matthieu OllivierJean-Noël A Argenson

Abstract

Component alignment can influence implant longevity as well as perhaps pain and function after unicompartmental knee arthroplasty (UKA), but correct alignment is not consistently achieved. To increase the likelihood that good alignment will be achieved during surgery, smart tools such as robotics or patient-specific instrumentation (PSI) have been introduced. We hypothesized that UKA performed with PSI would result in improved level gait as ascertained with three-dimensional analysis, implant positioning, and patient-reported outcomes measured by a validated scoring system when compared with conventional instrumentation 3 months and 1 year after surgery. We randomized 60 patients into two groups using either the PSI technique or a conventional technique. All patients were operated on using the same technique and the same cemented metal-backed implant. Mean age of the patients was 63 ± 4 years (range, 54-72 years) and mean body mass index was 28 ± 3 kg/m(2). Patients were evaluated preoperatively, at 3 months, and 1 year after surgery by an independent observer blind to the type of technique. Gait parameters were assessed with three-dimensional analysis during level walking preoperatively and at 1 year, frontal and sagittal posi...Continue Reading

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Citations

Aug 16, 2016·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Justin A M J van Leeuwen, Stephan M Röhrl
Oct 28, 2016·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Norberto ConfalonieriAlfonso Manzotti
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Feb 26, 2020·Acta ortopedica brasileira·Ahmet Nadir Aydemir, Mehmet Yucens
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Jul 19, 2019·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Sébastien PesentiJean-Luc Jouve
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Jul 2, 2021·The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS·Anurag MittalTae Kyun Kim

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