Evaluating the efficacy of hinged elbow braces in reducing passive valgus forces after ulnar collateral ligament injury-A biomechanical study.

Purpose: This biomechanical study aimed to investigate the effectiveness of a hinged elbow orthosis in reducing passive valgus forces following medial ulnar collateral ligament (UCL) injuries of the elbow joint. The hypothesis tested was that a hinged elbow orthosis reduces these passive valgus forces.

Methods: Eight fresh frozen cadaveric elbow specimens were prepared and tested under three scenarios: intact ligaments, simulated UCL rupture and application of a hinged elbow brace after simulated UCL rupture.

A Protocol for co-Injecting Cells with Pulverized Fibers for Improved Cell Survival and Engraftment.

Adipose tissue is crucial for medical applications such as tissue reconstruction, cosmetic procedures, and correcting soft tissue deformities. Significant advances in the use of adipose tissue have been achieved through Coleman's studies in fat grafting, which gained widespread acceptance due to its effectiveness and safety. Despite its benefits, adipose tissue grafting faces several limitations, including high absorption rates due to insufficient support or anchorage, replacement by fibrous tissue, migration from the intended site, and loss of the initial desired morphology post-administration.

Neutron phase filtering for separating phase- and attenuation signal in aluminium and anodic aluminium oxide.

Neutron imaging has gained significant importance as a material characterisation technique and is particularly useful to visualise hydrogenous materials in objects opaque to other radiations. Fields of application include investigations of hydrogen in metals as well as metal corrosion, thanks to the fact that neutrons can penetrate metals better than e.g.

Technical aspects of rod-insertion forceps (persuader) application in reducing construct failure after lumbar spine fusion surgery: a biomechanical cadaveric study in Germany.

Study Design: A prospective experimental study.

Purpose: This biomechanical in vitro study aimed to examine the extent to which the use of a rod persuader (RP) leads to additional mechanical stress on the screw-rod system and determine its influence on the bony anchoring of primary pedicle screws.

Overview Of Literature: Degenerative spine diseases and deformities are the most common indications for the stabilization and fusion of spinal segments.

Full-Length ITS Amplicon Sequencing Resolves Species in Surface Waters Used for Orchard Irrigation in California's San Joaquin Valley.

Diverse species, including many important plant pathogens, have been widely detected among surface water irrigation sources. In the past decade, metabarcoding has been used to characterize waterborne populations. Metabarcoding typically involves amplification of portions of the nuclear ribosomal internal transcribed spacers (ITSs) ITS1 or ITS2 from species, followed by indexed high-throughput sequencing.

[Technical modifications to elbow interposition arthroplasty].

Objective: Interposition arthroplasty of the elbow involves the interposition of a fascia lata or dermis autograft or allograft between the distal humerus and the ulna or radius, while preserving the original form of articulation.

Indications: Interposition arthroplasty is indicated for young patients with high functional demands who suffer from end-stage elbow arthritis and associated pain or joint stiffness.

Contraindications: Contraindications include acute or subacute infection, skeletal immaturity, bone loss, deformity, or gross instability.

[Central band reconstruction in Essex-Lopresti lesions].

Objective: Restoration of longitudinal forearm stability by reconstruction of the central band (CB) of the interosseous membrane (IOM) of the forearm.

Indications: Acute and chronic Essex-Lopresti lesions (EL) with longitudinal forearm instability.

Contraindications: Absolute: acute/subacute infection.

[Autologous minced cartilage implantation for focal cartilage lesions of the humeral capitellum].

Objective: The goal of minced cartilage implantation (MCI) is to restore an intact cartilage surface in focal osteochondral lesions of the humeral capitellum.

Indications: The indications for MCI are limited osteochondral lesions at the humeral capitellum, also at the head of the radius, with intact cartilage border as well as in situ or a completely detached fragment, and free joint bodies (grade II-grade V according to Hefti).

Contraindications: Contraindications for MCI are already concomitant or associated cartilage damage as well as bilateral osteochondral lesions and insufficient available cartilage material.

Early range of motion results in good elbow function following conservative treatment of non-displaced radial head fractures.

Introduction: The aim of this study was to evaluate the range of motion (ROM), elbow function and predictors for good elbow function after conservative treatment of non-displaced radial head fractures.

Material And Methods: All patients with non-displaced radial head fractures (displacement < 2 mm), that were diagnosed between January 1st 2017 and December 31st 2021 in a level I trauma center, were included in this retrospective case series and the charts were evaluated for ROM and elbow function. Elbow function was categorized as "good" or "bad" depending on the ROM measured defined by Morrey et al.

Torque forces of expandable titanium vertebral body replacement cages during expansion and subsidence in the osteoporotic lumbar spine.

Background: The application of expandable titanium-cages has gained widespread use in vertebral body replacement for indications such as burst fractures, tumors and infectious destruction. However, torque forces necessary for a satisfactory expansion of these implants and for subsidence of them into the adjacent vertebrae are unknown within the osteoporotic spine.

Methods: Six fresh-frozen human, osteoporotic, lumbar spines were dorsally instrumented with titanium implants (L2-L4) and a partial corpectomy of L3 was performed.

Mayo classification of olecranon fractures revisited - Assessment of intra- and interobserver reliability based on CT scans.

Purpose: Olecranon fractures are classified using the commonly accepted Mayo classification. Its reliability has been analyzed by means of radiographs. A CT scan is often obtained due to joint involvement.

Comprehensive analysis and classification of retrocondylar ulnar groove morphology using CT imaging in an average population of adults.

Purpose: Anatomical variations of the concave shaped retrocondylar ulnar groove (RUG) can contribute to ulnar nerve instability. However, there are currently limited available standardized data describing the anatomy of the RUG based on radiologic imaging, such as computed tomography (CT). This study aims to provide a comprehensive description and classification of RUG anatomy based on RUG angle measurements.

Trends in Patient-Reported Outcomes Measurement Information System (PROMIS) Utilization in Orthopedic Sports Medicine: A Scoping Review.

The Patient-Reported Outcomes Measurement Information System (PROMIS) developed by the National Institutes of Health provides a standardized method for collecting outcomes data from sports medicine patient populations. The objective of this scoping review is to report on PROMIS utilization in orthopedic sports medicine research and practice. We searched PubMed, ScienceDirect, and Cochrane Library using keywords and database-specific subject headings to identify studies that reported PROMIS utilization.

Intraoperative visualization of the posterolateral ulnohumeral joint space is reliable to indicate overlengthening in radial head arthroplasty.

Introduction: Avoiding overlengthening in radial head arthroplasty (RHA) is essential for the prognosis of the elbow joint. An overlengthening from 2 mm is visible due to widening of the anterolateral ulnohumeral joint space but intraoperatively, this particular joint space is difficult to visualize. The commonly used Kocher approach allows visualization of the posterolateral joint space without additional instruments or further surgical release of the already unstable elbow.

A Tensionable and Retensionable Knotless Anchor Repair Construct for Compression After Reduction of Tibial Avulsion Fracture of Anterior Cruciate Ligament.

Tibial avulsion fractures comprise a subset of anterior cruciate ligament injuries. Primary fixation methods have traditionally used either screw or suture fixation. New anchor and suture technologies have led to the development of tensionable and retensionable techniques.

ICAM-1-decorated extracellular vesicles loaded with miR-146a and drive immunomodulation and hinder tumor progression in a murine model of breast cancer.

Tumor-associated immune cells play a crucial role in cancer progression. Myeloid-derived suppressor cells (MDSCs), for example, are immature innate immune cells that infiltrate the tumor to exert immunosuppressive activity and protect cancer cells from the host's immune system and/or cancer-specific immunotherapies. While tumor-associated immune cells have emerged as a promising therapeutic target, efforts to counter immunosuppression within the tumor niche have been hampered by the lack of approaches that selectively target the immune cell compartment of the tumor, to effectively eliminate "tumor-protecting" immune cells and/or drive an "anti-tumor" phenotype.

The impact of the SARS-CoV-2 pandemic-related lockdowns on orthopedic trauma emergencies at a level-one trauma center.

Introduction: The SARS-CoV-2 pandemic and its associated lockdowns had a profound effect on orthopedic trauma emergencies. This study aimed to investigate the patient volume and injury patterns at a level-one trauma center during the SARS-CoV-2 pandemic and compare them to the pre-pandemic conditions.

Materials And Methods: A retrospective chart review of all patients who presented to the orthopedic trauma emergency department of a level-one trauma center in Cologne, Germany within a 2 year period from March 16th, 2019 to March 15th, 2020 (pre-pandemic control) and from March 16th, 2020 and March 15th, 2021 (pandemic) was performed.

Injectable pulverized electrospun poly(lactic-co-glycolic acid) fibers improve human adipose tissue engraftment and volume retention.

Autologous adipose tissue is commonly used for tissue engraftment for the purposes of soft tissue reconstruction due to its relative abundance in the human body and ease of acquisition using liposuction methods. This has led to the adoption of autologous adipose engraftment procedures that allow for the injection of adipose tissues to be used as a "filler" for correcting cosmetic defects and deformities in soft tissues. However, the clinical use of such methods has several limitations, including high resorption rates and poor cell survivability, which lead to low graft volume retention and inconsistent outcomes.

Rotator Cable Reconstruction: A Technique to Restore the Rotator Cable in the Setting of Large Cuff Tears.

The rotator cable is an essential biomechanical structure in the shoulder that is commonly injured in the setting of large rotator cuff tears. Surgical techniques designed to reconstruct the cable have followed advancements in our understanding of the biomechanics and anatomic importance of this structure. Owing to its role in load sharing and stress shielding of the rotator cuff crescent, rotator cable reconstruction offers the potential to reduce retear rates and promote longevity of rotator cuff repairs.

[Follow-up treatment concepts for elbow injuries].

So far there are no clear recommendations for postoperative follow-up treatment of elbow injuries and individual concepts are often chosen. Due to the susceptibility for posttraumatic or postoperative impaired movement up to stiffness of the elbow joint, early mobilization plays a crucial role. Therefore, mid-term to long-term immobilization should be avoided.

[Clinical results of total elbow arthroplasty after treatment failure for Monteggia-like injuries].

Background: Monteggia-like fractures (MLF) are complex injuries with high complication rates and frequently unsatisfying clinical results. Total elbow arthroplasty (TEA) represents the only option to salvage the functional requirements in some patients with pronounced posttraumatic arthropathy. This case series provides clinical results of TEA following failed treatment of MLF.