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Análisis de la congruencia de la articulación trapeciometacarpiana durante la oposición utilizando tomografía
Nathan Bormans1, Manou Acke2, Benyameen Keelson2
1Dept. Orthopaedics and Traumatology, UZ Brussel, Brussels, Belgium.
Hand surgery & rehabilitation
|January 15, 2026
Resumen
La imagenología de TC de cuatro dimensiones revela que la congruencia de la articulación trapeciometacarpiana (TMC) cambia durante el movimiento del pulgar. La inclinación trapecial y la subluxación dorsal disminuyen durante la oposición, mientras que la subluxación radial permanece estable.
Área de la Ciencia:
- Ortopedia
- Biomecánica
- Radiología
Sus antecedentes:
- La articulación trapeciometacarpiana (TMC) exhibe una cinemática compleja, lo que hace que la inestabilidad y la subluxación sean difíciles de cuantificar mediante radiografía tradicional.
- Las mediciones como la inclinación trapecial, el ángulo de subluxación dorsal y la relación de subluxación radial son susceptibles a variaciones en la incidencia radiográfica y la posición del pulgar.
Objetivo del estudio:
- Analizar la congruencia articular de la articulación TMC durante la oposición y retropulsión activas utilizando tomografía computarizada (TC) de cuatro dimensiones (4D).
- Investigar los cambios cinemáticos dinámicos dentro de la articulación TMC durante los movimientos funcionales del pulgar.
Principales métodos:
- Diez voluntarios sanos se sometieron a escaneo de TC 4D para capturar la cinemática de la articulación TMC durante un movimiento de retropulsión-oposición-retropulsión.
- Se midieron cuantitativamente la inclinación trapecial, el ángulo de subluxación dorsal y la relación de subluxación radial durante todo el movimiento activo.
Principales resultados:
- La inclinación trapecial mostró un cambio dinámico, disminuyendo de 124 grados en retropulsión a 120 grados en oposición.
- El ángulo de subluxación dorsal disminuyó significativamente de 68 grados en retropulsión a 45 grados en oposición.
- La relación de subluxación radial se mantuvo relativamente constante, oscilando entre el 19% y el 20% durante el movimiento.
Conclusiones:
- El movimiento de oposición en la articulación TMC se asocia con una disminución de la inclinación trapecial y la subluxación dorsal.
- La subluxación radial de la articulación TMC permanece constante durante la oposición y la retropulsión.
- Este modelo de TC 4D proporciona una base para futuros estudios sobre los impactos de la hiperlaxitud y la osteoartritis en la cinemática de la articulación TMC.
Palabras clave:
tomografía computarizada de cuatro dimensionescinemática in vivoarticulación trapeciometacarpianaMás Videos Relacionados
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