All-Inside Suture Fixation of the Lateral Meniscus to the Popliteal Tendon: A Biomechanical Evaluation.

Background: Lesions of the posterolateral parts of the lateral meniscus are commonly treated with all-inside suture repair. The popliteal tendon is one of the few anatomic structures available to attach these anchor systems. However, this method is controversial and its biomechanical effects are unknown.

Sports Preparticipation Evaluation for Healthy Adults: A Consensus-Based German Guideline.

The benefits of physical activity are undisputed. However, adverse events can occur in rare cases, particularly during high-intensity or prolonged exercise. During physical activity, at-risk patients can experience major cardiac events, whereas adverse events affecting the musculoskeletal system are more common but less severe.

MRI Diagnostics of the Fingers: Current Developments and Clinical Relevance.

Magnetic resonance imaging (MRI) is an excellent method for visualizing the complex anatomical structures of the fingers. The high diagnostic standard is based on numerous recent technical developments to improve soft tissue differentiation and detail recognition, and includes time-resolved functional imagingThis review highlights the current status of MRI in finger diagnostics. The content of this narrative review is based on a literature search in the PubMed and Google Scholar databases using the search terms "finger MRI" and "finger imaging".

Treatment of large chondral lesions with an autologous minced cartilage technique and synovial flap leads to superior results compared to matrix associated autologous chondrocyte transplantation technique after 24 months: A controlled clinical trial.

Purpose: Treating large cartilage lesions in the knee remains a challenge. While matrix-associated autologous chondrocyte implantation (MACI) is the gold standard for medium to large lesions, the minced cartilage technique has shown promise in smaller defects. Enhancing this technique with biomaterials has been suggested for larger lesions, but its effectiveness remains unclear due to limited data.

Biomechanical analysis of sport induced hamate stress fractures.

Background: Bouldering is known for a high risk of hamate injuries. Over 75 % of sport climbers have signs of upper extremity overuse injuries. Training overload corresponds with bone edema and was linked to fractures of the hamate.

Exploring the role of directly coupled alternating electric fields on chondrocyte morphology and redifferentiation capacity with a focus on sex differences.

Purpose: In cell-based therapies addressing articular cartilage lesions, a central challenge is to avoid the formation of fibrous cartilage resulting from dedifferentiation processes. Electrical stimulation emerges as a promising approach for promoting chondrocytic redifferentiation. This study investigated the effects of varying electric fields on morphological changes and the redifferentiation capacity of human chondrocytes with regard to alterations in sex.

The application of a digital therapeutic reveals superior outcome compared to standard care in patients with anterior knee pain-a randomized controlled trial.

Purpose: Anterior knee pain is a frequent symptom caused by disorders like patellofemoral pain syndrome or patella tendon tendinitis, which is commonly treated conservatively. The aim of the current study was to examine the effectiveness of a digital therapeutic (DT) versus German standard care through a prospective, randomized, multicenter controlled trial.

Methods: Study participants were recruited in 9 orthopedic specialist centers diagnosed with anterior knee pain and a NPRS score of ≥ 4.

Efficacy of a new treatment algorithm for capsulitis of the fingers in rock climbers.

Background: Although finger joint capsulitis has been described among the most frequent injuries in climbers, no clinical studies on treatment strategies and outcomes are available.

Study Design: Prospective case series study.

Methods: Between 2015 and 2018 we prospectively treated 50 patients (38 male, 12 female) with a total number of 69 independent finger joint capsulitis according to a clinic specific treatment regimen and evaluated the outcome retrospectively.

In-vivo stress measurements in kitesurfing and wakeboarding: implications on load control and preventive approaches - an in-vivo field study.

The trend sports kitesurfing and wakeboarding are increasingly gaining popularity. Tricks and high jumps - both in the air and over obstacles - are performed with increasing difficulty. Repeated high loads on the body, particularly when landing after a jump, can lead to overuse and acute injuries directly related to peak forces, particularly in the lower extremities.

A Gluteus-Specific Muscle Synergy Recruited During the First Recovery Step Following a Backward Pitch Perturbation.

The central nervous system momentarily activates a set of specific muscle synergies to maintain balance when external mechanical perturbations induce walking instability, which is critically involved in preventing falls. The activation patterns and composition of the muscle synergies recruited in the perturbed leg have not been fully characterized, and even less so for the recovery step. Here, we addressed this research gap by measuring the surface electromyographic data of the relevant muscles during a backward-pitched perturbed walk, and then extracting muscle synergy-related parameters using a non-negative matrix factorization algorithm.

Robotic-assisted surgery for adult spinal deformity. A systematic review.

Purpose: The goal of this systematic review is to offer a detailed summary of the present status of robotic-assisted surgery for adult spinal deformity.

Methods: This review is based on articles systematically searched in PubMed, Medline, and Web of Science Core Collection databases on robotic-assisted surgery for adult spinal deformity. Differences in the precision of pedicle screw placement, duration of surgery, and incidence of complications between robotic-assisted surgery and the conventional open surgery were considered.

Modeling of the native knee with kinematic data derived from experiments using the VIVO™ joint simulator: a feasibility study.

Background: Despite advances in total knee arthroplasty, many patients are still unsatisfied with the functional outcome. Multibody simulations enable a more efficient exploration of independent variables compared to experimental studies. However, to what extent numerical models can fully reproduce knee joint kinematics is still unclear.

Hinge screw or no hinge stabilization provides decreased stability compared to hinge plate in a biomechanical evaluation of distal femoral derotational osteotomies.

Purpose: Derotational distal femoral osteotomy (DFO) is the causal treatment for patients with femoral torsional deformity. The fixation is achieved by a unilateral angle-stable plate. Delayed- or non-unions are one of the main risks of the procedure.

An anteromedial stabilization procedure has the most protective effect on the anterior cruciate ligament in tibial external rotation. A human knee model study.

Introduction: Anterior cruciate ligament (ACL) reconstruction remains associated with the risk of re-rupture and persisting rotational instability. Additional extraarticular anterolateral stabilization procedures stabilize the tibial internal rotation and lead to lower ACL failure rate and improved knee stability. However, data for additional stabilization of tibial external rotation is lacking and the importance of an anteromedial stabilization procedure is less well evaluated.

Comparison of 3T and 7T magnetic resonance imaging for direct visualization of finger flexor pulley rupture: an ex-vivo study.

Objective: To compare image quality and diagnostic performance of 3T and 7T magnetic resonance imaging (MRI) for direct depiction of finger flexor pulleys A2, A3 and A4 before and after artificial pulley rupture in an ex-vivo model using anatomic preparation as reference.

Materials And Methods: 30 fingers from 10 human cadavers were examined at 3T and 7T before and after being subjected to iatrogenic pulley rupture. MRI protocols were comparable in duration, both lasting less than 22 min.

[Patient-specific cutting guides in corrective osteotomy near to the knee joint].

Objective: Patient-specific cutting guides (PSCG) are used in osteotomy near to the knee joint to simplify the operative technique, shorten the duration of surgery, reduce radiation exposure and to exactly realize the preoperative planning during surgery, especially when complex deformities are corrected simultaneously in multiple planes.

Indications: The application of PSCG is in principle possible in all osteotomies near to the knee joint but is especially useful in multidimensional, complex osteotomy.

Contraindications: No specific contraindications.

Refixation of the anterior cruciate ligament: A biomechanical analysis of suture techniques in a porcine model.

Purpose: Refixation of acute anterior cruciate ligament (ACL) tears represents an increasingly popular treatment option. Systematic evaluations of various suture technique parameters are still pending. We therefore aimed to evaluate the mechanical pull-out outcomes of various suture methods for optimization of ACL refixation.

[Double-Level De-Rotational Osteotomy of the Knee].

Derotational osteotomies of the proximal tibia and distal femur are a common surgical treatment option in patients with a congenital or posttraumatic torsional deformity. Clinically, these patients present with isolated anterior knee pain alone or in in combination with patellofemoral instability. Since the combination of femoral and tibial deformity is common (quotation Cooke), a combined surgical treatment is needed for these cases.

Vitamin E-enriched medium cross-linked polyethylene in total knee arthroplasty (VIKEP): clinical outcome, oxidation profile, and wear analysis in comparison to standard polyethylene-study protocol for a randomized controlled trial.

Background: The gliding surface of total knee endoprostheses is exposed to high loads due to patient weight and activity. These implant components are typically manufactured from ultra-high molecular weight polyethylene (UHMWPE). Crosslinking of UHMWPE by ionizing radiation results in higher wear resistance but induces the formation of free radicals which impair mechanical properties after contact with oxygen.

"Run-and-jump failure": new injury patterns in indoor bouldering.

In recent years, professional and non-professional bouldering have seen a fundamental change in movement patterns towards complex movement sequences. This is associated with increased demands on the musculoskeletal system, especially the lower extremities, which can lead to new injury patterns. In the course of our clinical work, we have already seen an increasing number of lower extremity injuries after run-and-jump sequences, with a severe one being highlighted in this case report.

Evaluation of finger cartilage composition in recreational climbers with 7 Tesla T2 mapping magnetic resonance imaging.

Purpose: Sport climbing may lead to tissue adaptation including finger cartilage before apparent surface damage is detectable. The main aim was to assess finger cartilage composition with T2 mapping in young, active climbers and to compare the results to a non-climbers' collective. A secondary aim was to compare whether differences in cartilage T2 times are observed between older vs.

Wrist Injuries in Climbers.

Background: Acute and chronic injuries to the wrist are among the most common sport-related complaints of climbing athletes but have not been extensively evaluated in this population. Therefore, it is important to categorize climbing injuries to the wrist, analyze risk factors, and assess treatment outcomes.

Purpose: To evaluate the distribution, outcomes, and influencing factors of wrist injuries in climbers.

Epidemiology of Acute and Overuse Injuries in Underwater Rugby.

Background: Underwater rugby (UWR) is a team sport. Athletes require a high degree of strength, endurance, speed, and coordination involving intense physical contact. Currently, a paucity of literature exists regarding injury occurrence in UWR.

Effects of exercise and cold-water exposure on microvascular muscle perfusion.

Purpose: Microvascular blood flow (MBF) and its intramuscular regulation are of importance for physiological responsiveness and adaptation. The quantifiable in-vivo monitoring of MBF after cycling or systemic cold-water exposure may reveal new insights into capillary regulatory mechanisms. This study aimed to assess the role of exercise and cold therapy on MBF by using contrast-enhanced ultrasound (CEUS).