Image-based robotics enhance precision and efficiency in lateral UKA: A comparative study of 135 UKAs.

Purpose: Robotic-assisted lateral unicompartmental knee arthroplasty (UKA) remains technically demanding due to the complex biomechanics of the lateral compartment. Image-based (IBRA) and imageless (ILRA) robotic systems have both demonstrated superior accuracy compared to conventional mechanical instrumentation, but have not yet been directly compared in lateral UKA. This study aimed to evaluate their respective accuracy and surgical efficiency.

Enhancing patellar positioning and tracking in robotic patello-femoral arthroplasty: a step-by-step technique.

Patellofemoral arthroplasty (PFA) is useful and effective option for treating patients with isolated patellofemoral osteoarthritis. The concept of functional positioning (FP) in PFA focuses on resurfacing the trochlea and restoring normal patellar tracking, while keeping the joint anatomy and kinematics. Even though the patellar liner cannot yet be placed with robotic assistance, robotic tools still help surgeons manage and optimize patellar tracking during surgery.

Lateral approach for total knee arthroplasty in patients with valgus deformity: A step-by-step surgical technique.

Background: The lateral approach in total knee arthroplasty (TKA) is indicated primarily for patients with valgus knee deformity, as it allows direct access to the lateral anatomy and systematic correction of associated pathologies.

Surgical Technique: This technique involves strategic lateral soft tissue releases, which improve exposure to the posterolateral corner, enhance tibial rotation, and support patellar alignment without compromising medial vascularity or requiring a tibial tubercle osteotomy for joint exposure. Critical steps in the lateral TKA approach include maintaining a capsular-synovial overlap and preserving the Hoffa fat pad for optimal joint closure, releasing the lateral soft-tissue structures, and using a contralateral tibial cutting guide for enhanced access and protection of the patellar tendon.

Comparable outcomes and early revision rates between restricted and unrestricted functional knee positioning in robotic-assisted total knee arthroplasty for varus deformities ≥10°.

Purpose: Functional knee positioning (FKPos) in total knee arthroplasty (TKA) optimises outcomes by balancing individual anatomical and soft tissue characteristics. Managing marked varus deformity presents challenges in achieving balance when tibial alignment is restricted to 3° of varus, necessitating either medial soft tissue release or unrestricted tibial positioning. This study aims to compare restricted FKPos with medial soft tissue release to unrestricted FKPos without soft tissue release in patients with varus deformity ≥10°.

Evaluation of eccentric and concentric force during vertical jump after anterior cruciate ligament reconstruction: a comparative study.

Background: Anterior cruciate ligament reconstruction (ACL-R) significantly affects lower limb biomechanics, particularly during dynamic movements like jumping. The countermovement jump (CMJ) is a commonly used test to evaluate force production and asymmetry in post-ACL-R individuals. This study aimed to compare eccentric and concentric forces during the CMJ between ACL-R patients and healthy controls.

Cemented dual-mobility total hip arthroplasty cups in a custom-made acetabulum: a clinical and radiological evaluation.

Background: Acetabular reconstruction during revision total hip arthroplasty (THA) with major bone loss is a complex surgical challenge. The combination of custom-made (CM) acetabular components with cemented dual mobility (DM) cups may improve postoperative outcomes in this context. This study aims to assess the clinical, functional, and radiological results of this surgical approach.

Various surgical techniques result in different outcomes for full extensor mechanism ruptures following total knee replacement: A systematic review by the European Knee Associates (ESSKA-EKA).

Purpose: Extensor mechanism (EM) ruptures after total knee arthroplasty (TKA) are rare but lead to substantial functional impairment and morbidity. Treatment remains challenging due to the diversity of surgical techniques and the limited number of comparative studies. The European Knee Associates (EKA) group conducted a systematic review to evaluate available treatments for EM rupture following primary TKA, assess outcomes such as extensor lag, patient-reported outcome measures (PROMs) and walking status, and to identify prevailing trends and complication rates.

The learning curve of novel implant total knee arthroplasty system in high-volume university center.

Introduction: The learning curve associated with adopting new surgical systems in total knee arthroplasty (TKA) can significantly impact surgical efficiency and patient outcomes. This study aimed to evaluate the evolution of operative time with the KNEO (Groupe Lépine, Genay, France) posterior stabilized knee system and to analyze the learning curve for postoperative complications to achieve surgical proficiency.

Method: This retrospective, multicentric study analyzed 481 patients who underwent primary TKA with the KNEO implant in a high-volume university center between 2020 and 2024.

Robotic total knee arthroplasty with functional alignment yields comparable outcomes across age and gender groups.

Objectives: Age and gender can influence total knee arthroplasty (TKA) outcomes, complications, and revision rates. Functional alignment (FA), a personalized approach guided by robotic systems, has emerged as a strategy to optimize outcomes by addressing patient-specific anatomy and laxities. However, limited evidence exists regarding the influence of age and gender on outcomes of FA-guided robotic-assisted TKA.

Preoperative flexion contracture does not impair outcomes or early revision rates following robotic total knee arthroplasty with functional alignment.

Purpose: Preoperative flexion contracture remains a challenging deformity in total knee arthroplasty (TKA). This study aimed to evaluate whether the presence of preoperative flexion contracture influences outcomes and early revision rates following robotic-assisted TKA performed with functional alignment (FA) principles.

Methods: This retrospective comparative study analysed 190 patients who underwent robotic-assisted TKA using a computed tomography-based FA strategy.

Patellofemoral alignment safe zones in robotic-assisted TKA do not affect outcomes but do influence patellar resurfacing rates.

Purpose: Anterior compartment management remains a challenging aspect of total knee arthroplasty (TKA), particularly in personalised alignment strategies. This study aimed to assess whether restoring patellofemoral alignment parameters within predefined safe zones-specifically patellar tilt (PTi), patellar translation (PTr) and patellar offset (PO)-is associated with improved clinical outcomes following robotic-assisted TKA (rTKA).

Methods: This retrospective study included 283 patients who underwent primary rTKA between March 2021 and January 2023 using functional alignment (FA) or functional knee positioning (FKP) principles.

Satisfactory and Similar Outcomes After Knee Arthroplasty Revisions in One or Two Stages for Infection, Following a Surgical Strategy Based on Robust Guidelines.

Background: This study aimed to assess the outcomes of a one-stage or two-stage strategy after revision total knee arthroplasty for periprosthetic joint infection.

Methods: This single-center retrospective study included all TKA revisions for chronic infection operated on between 2010 and 2021, with at least two years of follow-up. The surgical strategy was based on the recommendations from the Philadelphia Consensus 2018.

Reduced quadriceps deficit following dry arthroscopy compared to standard fluid arthroscopy at the time of MPFL reconstruction.

Purpose: Recurrent patellar dislocations (RPDs) are prevalent, particularly among adolescents. The 'Menu à la carte' technique facilitates personalized management of each patient through reconstruction of the medial patellofemoral ligament (MPFL) while simultaneously addressing other anatomical factors that may contribute to instability. Arthroscopy, frequently performed prior to stabilization surgery to identify and treat intra-articular pathology, carries specific risks.

Temporal power of a cycling sprinter: experiments and effective time theory.

Using data recorded on ergocycle and at the National Velodrome of Saint-Quentin-en-Yvelines, either during training sessions or during the 2022 World Championships, we first carry out an experimental study of the decay over time of the power produced by a sprinter. We then develop a theoretical model for the power output based on the definition of an effective time to account for fatigue. Comparisons between the predictions of the model and the experimental data show a good agreement in all the conditions tested, both on ergocycle and in the velodrome.

Functional alignment in robotic total knee arthroplasty achieves comparable outcomes in varus and valgus knees despite distinct intraoperative strategies: Analysis of 355 consecutive cases.

Purpose: Functional alignment (FA) optimises implant positioning based on patient-specific anatomy, but data on intraoperative adjustments in varus and valgus knees remain limited. This study evaluates the impact of preoperative coronal alignment on implant positioning, bone resections, functional outcomes, and revision rates in robotic-assisted total knee arthroplasty (TKA) under FA principles.

Methods: A retrospective analysis of 355 robotic-assisted TKAs performed with FA was conducted.

Does patellar resurfacing matter in robotic-assisted total knee arthroplasty with functional alignment principles?

Purpose: While new philosophies in total knee arthroplasty (TKA) aim to optimize alignment and ligament balancing, restoring the anterior compartment and understanding the consequences of patella resurfacing remain challenging. This study evaluates the functional consequences of anterior compartment restoration, with a specific focus on patella resurfacing when performing robotic-assisted TKA using functional alignment (FA) principles.

Methods: This retrospective comparative study included 268 patients affected by an end-stage varus osteoarthritis who underwent robotic TKA according to FA principles.

Does the use of shortened stems reduce early femoral complications in total hip arthroplasty using the direct anterior approach?

Introduction: The choice of femoral stem design during total hip arthroplasty (THA) through the Direct Anterior Approach (DAA) is critical. Shortened stems offer potential benefits such as bone preservation and reduced stress shielding. This study aimed to compare early complications at one year of follow-up between shortened and standard stems in DAA THA.

Higher rates of meniscal and chondral lesions in second compared with first revision anterior cruciate ligament reconstructions.

Aims: The aim of this study was to describe the rate of meniscal and chondral lesions in patients undergoing their first revision anterior cruciate ligament (ACL) reconstruction compared with those undergoing a second revision reconstruction.

Methods: This was a retrospective single-centre study, involving patients who underwent at least one revision ACL reconstruction between January 2012 and January 2022. Inclusion criteria were all patients aged between 16 and 60 years who underwent revision ACL reconstruction.

Both Isometric and Dynamic Testing Are Essential for a Comprehensive Assessment of the Knee Extensors.

Grossio, L, Salvaggio, F, Brustio, PR, Rainoldi, A, Samozino, P, and Boccia, G. Both isometric and dynamic testing are essential for a comprehensive assessment of the knee extensors. J Strength Cond Res XX(X): 000-000, 2025-The improvements of measurement tools and data analysis enhanced our possibilities to assess neuromuscular performance, but also created confusion regarding significance and practical applications of this available information.

Functional positioning in robotic patello-femoral arthroplasty: a step-by-step technique.

Patello-femoral arthroplasty (PFA) is an effective treatment option for isolated patello-femoral osteoarthritis. However, challenges remain regarding implant positioning and patellar tracking. Recent advances in implant design and robotic-assisted techniques have contributed to more personalized and reproducible procedures.

Functional positioning in robotic medial unicompartmental knee arthroplasty: a step-by-step technique.

Unicompartmental knee arthroplasty (UKA) compared to total knee arthroplasty, offers several benefits, though it is associated with a higher revision rate, primarily due to suboptimal implant positioning. Recent advances in robotic-assisted techniques have contributed to more personalized and reproducible procedures. Functional Positioning (FP), a three-dimensional alignment concept, introduces a tailored approach based on a surgical technique that is both effective and reproducible.

Sex differences in the rate of torque development and torque-velocity relationship are due to maximal strength only.

Purpose: This study aimed to analyse the sex differences in the rate of torque development (RTD) and torque-velocity parameters with and without normalisation for maximal voluntary torque (MVT).

Methods: Right-leg knee extensors were tested in 64 healthy and active participants (31 F and 33 M). MVT and RTD were obtained under isometric conditions.

Rotating-platform deep-dish total knee arthroplasty with restricted kinematic alignment: Five-year clinical and functional outcomes.

Introduction: Total knee arthroplasty (TKA) utilizing deep-dish tibial inserts has gained interest due to its high congruency and enhanced stability. However, due to the advent of more personalized alignment philosophies, the combination of a rotating-platform deep-dish TKA design with restricted kinematic alignment (rKA) might improve patient satisfaction. Therefore, this study evaluated the five-year clinical and functional outcomes of rKA with a deep-dish TKA design.

Effects of a forefoot strengthening protocol on explosive tasks performance and propulsion kinetics in athletes: a single-blind randomized controlled trial.

Purpose: To investigate the effects of an 8-week "periodized high-load" forefoot strengthening protocol on athlete's metatarsophalangeal joints (MTPj) flexion torque, MTPj flexors volume, sprint acceleration, cutting, and jumping overall performance and kinetics.

Methods: Twenty-height highly-trained athletes were randomized into a TRAINING or control group. Following a 4-week control period, TRAINING performed an 8-week forefoot strengthening protocol (2 sessions per week) followed by a 4-week detraining period.