What is the base of proximal phalanx?
The base end of the proximal phalanx is concave in shape where it connects to the metatarsal bone. The head of the proximal phalanx connects to the intermediate phalanx in a trochlear fashion that allows for articulation.
How do you know if proximal phalanx is broken?
- Swelling of the fracture site.
- Tenderness at the fracture site.
- Bruising at the fracture site.
- Inability to move the injured finger in completely.
- Deformity of the injured finger.
What type of bone is the proximal phalanx?
Proximal phalanges (foot) are the largest bones in the toe. They form the base of the toe and are a separate bone from the middle phalanges (the center bones in the toes) and the distal phalanges (the bones at the tip of the toes). They are connected to the metatarsals, or long bones in the feet, by cartilage.
Where is the proximal phalanx located?
The proximal phalanx of the fingers is the proximal, or first bone, in the fingers when counting from the hand to the tip of the finger. There are three phalanges in each finger. The proximal phalanx is the largest of the three bones in each finger; it has joints with the metacarpal and with the middle phalanx.
How are fractures at the base of the proximal phalanx treated?
Treatment of base fractures in the proximal phalanx depends on the fracture type, the degree of displacement, and whether fracture reduction is stable or not. In this chapter, intervention options are reviewed focusing on restoration of finger function and to a lesser extent on exact reposition of the fractured digit.
What causes the shortening of the proximal phalanx?
Malunion causes impairment of digital function, and causes loss of equilibrium between flexor and extensor tendons. Clinically, the shortening of the proximal phalanx leads to loss of full extension at the PIP joint due to laxity of the extensor mechanism, and the dorsal angulation to hyperextension at the fracture site and MP joint.
How are K wires used to treat phalanx fractures?
Proximal phalanx fractures treated with 2 parallel transarticular K-wires inserted radial and ulnar to the extrinsic extensor tendon showed good overall TAM of 265° at final follow-up and a mean range of PIP joint motion of 96°.19
Are there any guideline for phalangeal finger fractures?
This Guideline is for fractures of the phalanges of the ulnar four digits (index, middle, ring and little fingers). Fractures of the THUMB are covered separately, as are METACARPAL FRACTURES.