Publications by authors named "S Lappen"
Suture button systems for coronoid fracture fixation: a biomechanical time-zero pilot study.
BMC Musculoskelet Disord
January 2025
Purpose: This study aims to describe a fixation technique for coronoid fractures using suture buttons, and to biomechanically evaluate this technique in comparison to screw fixation as a time-zero pilot study.
Methods: An O'Driscoll type 2 anteromedial coronoid facet (AMCF) fracture was simulated in 20 fresh-frozen human elbows. The specimens were randomized into two groups and fracture fixation was performed with either a suture button system or a 3.
Article Synopsis
- The study aimed to compare the constraint levels of reverse total shoulder arthroplasty (rTSA) liners from different implant systems, focusing on how design affects stability.
- Using 3D planning software, measurements of jump height, stability ratio, and angle of coverage were conducted for various liner sizes to evaluate differences among implant systems.
- Results indicated significant variability in stability ratios and jump heights between different rTSA systems, with some systems maintaining consistency in stability across sizes while others showed considerable inconsistencies.
Background: Coronal shear fractures of the capitellum are rare injuries which can be challenging to treat. The aim of this study was to compare the biomechanical properties of different internal screw fixation techniques for Dubberley type IA fractures of the capitellum.
Methods: In this biomechanical study, Dubberley type IA fractures of the capitellum were created in 30 human fresh-frozen humeri.
Article Synopsis
- Posterior shoulder instability (PSI) is reported in 2-12% of shoulder instability cases but may actually account for up to 24% in young, active patients needing surgery.
- Symptoms of PSI are often vague and can include shoulder pain during physical activity or limited range of motion, complicating diagnosis.
- Accurate identification of PSI involves recognizing different clinical presentations and implementing appropriate diagnostic criteria and treatment plans.
Article Synopsis
- The study focuses on the fixation of the trochlea in low transcondylar fractures of the distal humerus, which is crucial for elbow stability during surgery.
- Twenty human cadaveric humeri were tested, divided into two groups, with one group utilizing screws that extended into the trochlea and the other not.
- Results showed that the group with trochlea fixation had significantly less displacement and higher ultimate failure loads, indicating improved stability in the surgical construct.