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Carpal Kinematics in Madelung Deformity
Abbas Peymani1, Marieke G A de Roo1, Johannes G G Dobbe2
1Department of Plastic, Reconstructive and Hand Surgery; Department of Biomedical Engineering and Physics.
The Journal of Hand Surgery
|April 14, 2021
Summary
Madelung deformity significantly reduces wrist mobility, particularly in the lunate and triquetrum bones. This biomechanical study used 4D imaging to reveal decreased carpal bone rotation and translation in affected wrists.
Area of Science:
- Orthopedics
- Biomechanics
- Radiology
Background:
- Madelung deformity involves skeletal and soft tissue abnormalities, but its pathological basis remains unclear.
- Understanding the biomechanics of the Madelung deformity wrist is crucial for explaining its progressive symptoms.
Purpose of the Study:
- To biomechanically assess the Madelung deformity wrist using 4-dimensional computed tomography (4D CT) imaging.
- To quantify carpal kinematics and radiocarpal joint parameters in Madelung deformity wrists compared to healthy controls.
Main Methods:
- Nine Madelung deformity wrists and 18 healthy wrists underwent 4D CT imaging during flexion-extension and radioulnar deviation.
- Carpal bone kinematics (rotation, translation) and joint parameters (surface area, joint space thickness) were analyzed.
Main Results:
- Madelung deformity wrists showed significantly decreased rotation of the lunate and triquetrum during flexion-extension.
- Reduced lunate and triquetrum translation, along with decreased articulating surface areas of the scaphoid and lunate fossae, were observed.
- Increased radioscaphoid and radiolunate joint space thicknesses were noted in Madelung deformity wrists.
Conclusions:
- Madelung deformity is characterized by decreased mobility of the lunate and triquetrum bones.
- These kinematic changes contribute to the understanding of Madelung deformity's pathology.
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