0 a flat shape that has four straight sides, only two of which are parallel; trapezoid American . -- hình thang
1 a flat shape that has four straight sides, none of which are parallel; trapezoid British . -- hình thang
The trapezium is the most radial of the bones surrounding the carpal tunnel.
The third metacarpal is connected to the trapezium, to the capitate, and to the hamate.
The second metacarpal is connected to the trapezium.
After arthrodesis, non-union, in which fusion of the trapezium bone with the metacarpal bone fails, occurs in 8% to 21% of the cases.
The opponens pollicis originates on the tubercle of the trapezium and the flexor retinaculum.
The "lateral surface", convex and smooth, articulates with the trapezium.
The scaphoid contributes to the stability of the midcarpus as it articulates distally with the trapezium and the trapezoid.
The second metacarpal bone is connected to the trapezium, trapezoid, and capitate.
