Scaphoid

introduction

The name scaphoid means both a bone in the hand and a bone in the foot. In order to keep confusion as low as possible, in medicine the Os scaphoideum and from Os Naviculare spoken, the Scaphoid the bone in the hand and that Os Naviculare the bone is in the foot.

The scaphoid bone in hand

The scaphoid is one of the eight bones that make up the Carpal form. It is between thumb and spoke and is the largest of the carpal bones. The adjacent bones of the navicular bone are:

• the Moon leg (Os lunare)
• the small square legs ( Trapezoid bone )
• the large square leg (Trapezium)
• the Head leg (Os capitatum)

The scaphoid can through the skin the inner surface because it has a small appendix.

The most common carpal fractures involve the navicular bone. Most often this happens when you fall where you support yourself with your hand. Often such a break is not noticed at first, which later becomes painful arthrosis can lead.

Even with proper treatment, it sometimes grows badly together. This is due to the fact that in the event of a break the blood vessel supplying the bone tears off and can no longer supply the bone.

Outline of the hand
(Joint lines green)
I - Upper (proximal) wrist
II - Lower (distal) wrist
III - carpal - metacarpal
Joints
IV - metacarpal joint
V - median joint
(missing on thumb)
VI - interphalangeal joint
VII - thumb joint

1. Distal phalanx -
   Phalanx distalis
2. Phalanx -
   Phalanx media
3. Phalanx -
   phalanx proximalis
4. Metacarpal bones - Metacarpals
5. Trapezoidal leg - Trapezium
6. Trapezoid leg - Trapezoid bone
7. Head leg - Os capitatum
8. Hook leg - Hamate bone
9. Scaphoid bone of the hand -
   Scaphoid bone
10. Moonbone - Lunate bone
11. Triangular leg - Os triquetrum
12. Pea bone - Os pisiform
13. Sesame bone - Os sesamoideum
14. Cubit - Ulna
15. Spoke - radius

You can find an overview of all Dr-Gumpert images at: medical illustrations

The scaphoid bone in the foot

The scaphoid im foot is in the medicine also as Navicular bone designated. This can sometimes lead to confusion because the scaphoid bone in the hand was used earlier than Os Naviculare designated. The scaphoid bone is a relatively short bone and is part of the Tarsusl. The adjacent bones are:

• the Ankle bone (Talus)
• the Heel bone (Calcaneus)
• the Cuneiform bones (Os cuneiform I & II & III)
• the Cuboid bone (Os cuboideum)

It lies on the side of the big toe under the Os cuneiform one.

A Fracture of the scaphoid bone in the foot is significantly rarer than one Fracture of the scaphoid bone in the hand.