IEEE Trans Neural Syst Rehabil Eng
November 2023
Ankle osteoarthritis does not only led to lower ankle power generation, but also results in compensatory gait mechanics at the hip and Chopart joints. Much of previous work explored the relative work distribution after total ankle replacement (TAR) either across the lower extremity joints where the foot was modelled as a single rigid unit or across the intrinsic foot joints without considering the more proximal lower limb joints. Therefore, this study aims, for the first time, to combine 3D kinetic lower limb and foot models together to assess changes in the relative joint work distribution across the foot and lower limb joints during level walking before and after patients undergo TAR.
View Article and Find Full Text PDFBackground: The tibiotalar arthrodesis for end-stage ankle osteoarthritis is a surgical procedure that leads to a modification of the kinematics of the adjacent joints and may result in the development of secondary osteoarthritic degeneration of the subtalar joint. It has previously been observed that subtalar arthrodesis in this context shows a lower fusion rate than isolated subtalar arthrodesis. This retrospective study reports the results of subtalar joint arthrodesis with previous ipsilateral tibiotalar arthrodesis and suggests some factors that may compromise the fusion of the joint.
View Article and Find Full Text PDFBackground: Previous studies have examined the effect of concomitant triceps surae lengthening on ankle dorsiflexion motion at the time of total ankle arthroplasty (TAA). As plantarflexor muscle-tendon structures are important for producing positive ankle work during the propulsive phase of gait, caution should be exercised when lengthening triceps surae, as it may decrease plantarflexion strength. In order to develop an understanding of the work of the anatomical structures crossing the ankle during propulsion, joint work must be measured.
View Article and Find Full Text PDFBackground: Although considerable literature can be found on the outcome of total ankle replacement (TAR), only a few studies have reported the results of the fixed-bearing Cadence prosthesis. This noninventor study reports a consecutive series of 60 Cadence TAR systems with a mean of 2.9 years' follow-up, focusing on clinical and radiographic outcomes and early complications.
View Article and Find Full Text PDFBackground: The success of total ankle replacement (TAR) must be based on restoring reasonable mechanical balance with anatomical structures that can produce mechanical joint work through elastic (eg, tendons, fascia) or viscoelastic (eg, heel pad) mechanisms, or by active muscle contractions. Yet, quantifying the work distribution across the affected joint and the neighboring foot joints after TAR is lacking. Therefore, the objective of this study was to investigate if there is a change in the joint work distribution across the Ankle, Chopart, Lisfranc and Metatarsophalangeal joints during level walking before and after patients undergo TAR.
View Article and Find Full Text PDFIntroduction: Total ankle arthroplasty (TAA), tibiotalar (TT) arthrodesis and tibiotalocalcaneal (TTC) arthrodesis are common surgical procedures that are sometimes concurrent. The functional results of TTC are deemed to be inferior because of the double joint sacrifice. Patient-Reported Outcome Measures (PROMs), as well as satisfaction scores, are commonly used to assess the outcome of these surgeries, but lack at capturing patients' ability to cope with potential functional limitations.
View Article and Find Full Text PDFFifth metatarsal shaft osteotomy has demonstrated efficacy for bunionette. We adapted screwless 1st metatarsal scarf osteotomy to the 5th ray. The technique consists in short osteotomy, translation and diaphyseal bone-suture.
View Article and Find Full Text PDFBackground: Common etiologies for post-traumatic ankle osteoarthritis are ankle fractures and chronic ankle instability. As the nature of trauma is different for these two etiologies, it might be expected that the two subtypes of post-traumatic ankle osteoarthritis would display different foot mechanics during gait.
Research Question: The objective of this exploratory cross-sectional study was to compare the foot kinematics and kinetics of patients suffering from post-fracture ankle osteoarthritis with those of patients suffering from post-sprain ankle osteoarthritis.
Background: Kinematic and kinetic foot models showed that computing ankle joint angles, moments and power with a one-segment foot modeling approach alters kinematics and tends to overestimate ankle joint power. Nevertheless, gait studies continue to implement one-segment foot models to assess the effect of total ankle replacement.
Research Question: The objective of this pilot study was to investigate the effect of the foot modeling approach (one-segment versus multi-segment) on how total ankle replacement is estimated to benefit or degrade the patient's biomechanical performance.
Background: Ankle and hindfoot malalignment is a common finding in patients suffering from post-traumatic ankle osteoarthritis. However, no studies have addressed the effect of concomitant foot deformities on intrinsic foot kinematics and kinetics. Therefore, the objective of this study was to investigate the effect of ankle and hindfoot malalignment on the kinematics and kinetics of multiple joints in the foot and ankle complex in patients suffering from post-traumatic ankle osteoarthritis.
View Article and Find Full Text PDFWe report the observation of the soft tissue recurrence of an osteoid osteoma (OO) in a 26-year-old man initially complaining of post-traumatic pain and swelling of the right ankle. A first arthroscopic resection was performed after the misdiagnosis of "bone irregularities" observed on computed tomography (CT) and magnetic resonance imaging (MRI). The diagnosis of OO was made by histological analysis of the resection material.
View Article and Find Full Text PDFBackground: This study evaluated the 3D angle between the joint moment and the joint angular velocity vectors at the intrinsic foot joints, and investigated if these joints are predominantly driven or stabilized during gait.
Methods: The participants were 20 asymptomatic subjects. A four-segment kinetic foot model was used to calculate and estimate intrinsic foot joint moments, powers and angular velocities during gait.
Background: The aim of this systematic review with meta-analysis was to determine the change in gait biomechanics after total ankle replacement and ankle arthrodesis for end-stage osteoarthritis.
Methods: Electronic databases were searched up until May 2019. Peer-reviewed journal studies including adult participants suffering from end-stage ankle osteoarthritis and reporting pre- and post-operative kinematics, kinetics and spatio-temporal effects of total ankle replacement and ankle arthrodesis during walking were included with a minimum of 12 months follow-up.
Iatrogenic hallux varus is a dreaded complication of hallux valgus surgery, consisting in 1st-ray deformity in the form of medial malalignment of the 1st phalanx with respect to the metatarsal axis. Such over-correction results from imbalance between excessive medial capsule retraction or tensioning and excessive lateral laxity or soft-tissue release. There may be loss of medial stability of bone origin due to excessive "exostosectomy" or excessive intermetatarsal angle closure.
View Article and Find Full Text PDFIntroduction: Nonunion is a common complication (15%) of hindfoot and ankle arthrodesis. Autograft can improve the fusion rate because of its osteoconductive, osteoinductive and osteogenic properties. However, autograft harvesting is a source of morbidity.
View Article and Find Full Text PDFIntroduction: Although subtalar joint arthrodesis may be achieved through open or arthroscopic approaches, we have found that posterior arthroscopic subtalar arthrodesis has technical advantages compared with other approaches.
Step 1 Preoperative Assessment And Planning: Clinically assess the foot and ankle with regard to remaining motion, previous scarring, and associated deformities, ensuring that no concomitant procedure will be needed in the supine position.
Step 2 Positioning Of The Patient: Use spinal or general anesthesia.
Background: Residual pain due to impingement after ankle arthroplasty can be addressed with arthroscopic debridement. Literature focusing on the effectiveness of arthroscopic debridement after total ankle arthroplasty (TAA) is scarce. The authors report a case series of 12 patients complaining of anterior or posterior impingement pain, 11 of which were in the absence of malalignment which were treated by arthroscopy.
View Article and Find Full Text PDFBackground: Clinical and cadaver studies have reported that supernumerary muscles could be the etiology of a variety of pathologic disorders, such as posterior impingement syndrome, tarsal tunnel syndrome (TTS), and flexor hallucis longus tenosynovitis. We describe a unique variant of the flexor digitorum accessorius longus (FDAL) muscle as an apparent cause of TTS, functioning as an independent flexor of the second toe, which has not been described in the literature. In addition to this case report, a systematic review was performed of TTS caused by the FDAL muscle.
View Article and Find Full Text PDFBackground: The literature analyzing total ankle replacement (TAR) results should be critically interpreted because studies made by the design surgeons are potentially subject to bias. European nondesigner surgeon studies reviewing the HINTEGRA TAR system are scarce in the literature. The present study is a European nondesigner surgeon study reviewing a consecutive series of 50 HINTEGRA TAR systems with a minimum follow-up of 2 years, focusing on clinical and radiographic outcomes.
View Article and Find Full Text PDFBackground: The literature on salvage procedures for failed total ankle replacement (TAR) is sparse. We report a series of 17 patients who had a failed TAR converted to a tibiotalar or a tibiotalocalcaneal arthrodesis.
Methods: Between 2003 and 2012, a total of 17 patients with a failed TAR underwent an arthrodesis.
Orthop Traumatol Surg Res
December 2012
Scarf osteotomy of the first metatarsal bone to correct hallux valgus deformity has benefited from a number of improvements over the past two decades, most notably regarding the internal fixation method. Internal fixation was deemed mandatory by the authors of early case-series studies. Maestro suggested eliminating the proximal screw by locking the two fragments distally: a notch was created via a medial extension of the cephalic part of the osteotomy, the plantar fragment was displaced laterally, and the distal end of the proximal fragment was then fit into the notch (secondary cut and interlocking joint technique).
View Article and Find Full Text PDFOrthop Traumatol Surg Res
June 2011
Background: Isolated subtalar arthrodesis is the treatment of choice for several conditions -mostly subtalar arthritis, tarsal coalition and posterior tibial tendon dysfunction- unresponsive to conservative treatment. Arthroscopic procedures are an interesting recent alternative, less invasive than conventional open techniques. Posterior arthroscopy, in prone position, could be more advantageous than the conventional lateral and/or anterior approach.
View Article and Find Full Text PDFAs diabetes takes on pandemic proportions, it is crucial for the orthopedic surgeon to be aware of the issues involved in diabetic foot. Ulceration is related to neuropathy and to arterial disease, a vital prognostic factor for healing; infection plays an aggravating role, increasing the risk of amputation. At-risk feet need to be screened for.
View Article and Find Full Text PDFAim: To assess the effectiveness of the Barouk(®) second-generation postoperative forefoot relief shoes during appropriate use of the shoe on healthy subjects.
Materials And Methods: A convenience sample of 35 volunteer subjects (17 women, 18 men) was recruited to participate in this study. Dynamic foot loading was evaluated with inshoe plantar pressure measurements.