Management selection. Phalanx Dislocations Joseph A. Rosenbaum Hisham M. Awan INTRODUCTION Pathoanatomy Dislocations of the finger joints secondary to trauma Force applied to the joint exceeds the strength of its capsuloligamentous support. Diagnosis. Dislocation occurs at one of the joints where the phalanx bones come together. The majority of thumb and phalangeal dislocations are dorsal, and the finger or thumb will appear hyper-extended at the affected joint. Dislocation of a digit is common among skeletally mature adolescents and active young adults. Stable fractures that are not displaced can be treated with buddy taping and early range of motion. middle phalanx remains in contact with condyles of proximal phalanx; complex .

The three toe joints where dislocation can occur are: distal interphalangeal (DIP), or outer joint

Open all credits. Gerrand CH, Jarrett … We help you diagnose your Hand Middle phalanx case and provide detailed descriptions of how to manage this and hundreds of other pathologies. Specialty. Eaton type II (dorsal dislocation) Complete dorsal dislocation of the PIP joint and avulsion of the volar plate. Body weight is transmitted to ground through the arch of the foot while standing, walking, and jogging. In addition to the dislocation, fractures (broken bones), ligament and tendon injuries, and nerve damage may accompany the joint injury. Fractures: AP, lateral, and oblique (condyles) radiographs may display fractures of the head of the proximal phalanx or the base of the middle phalanx. simple . Mechanism of injury Mechanisms of injury include torsional, angular, and tractional forces across joint. Middle phalanx fractures are the least common of the phalanx fractures. Fiesky Nuñez, Renato Fricker, Matej Kastelec, Terry Axelrod. Volar dislocation: tenderness of the dorsal aspect of the base middle phalanx; lateral radiograph reveals a fracture of the dorsal aspect of the base of the middle phalanx. Chris Colton .

Lateral dislocation: The phalanx closer to the tip of the finger is displaced to the side. In this type of dislocation, rotation of the middle phalanx may be observed. 14 Displaced fractures may be treated with closed reduction and splinting; if this fails, surgical treatment may be needed. Arch of the foot is mechanically strong and designed to shift the weight to front half and back half of the foot during daily activities. Module. (When only one collateral ligament is intact, the phalanx is free to pivot.) Authors of section Authors.

At the PIP joint, the biconcave base of the middle phalanx articulates with the convex head of the proximal phalanx. These joints are stabilized by a volar plate, extensor apparatus, capsule, and collateral ligaments. Dislocation may be part of a more severe overall … bayonet deformity; base of middle phalanx not in contact with condyle of proximal phalanx ; volar plate can act as block to reduction with longitudinal traction; volar dislocations . direction of the dislocation (palmar, lateral, or dorsal) Eaton type I (hyperextension) These are hyperextension injuries, with an avulsion of the volar plate and a longitudinal split in the collateral ligaments. (See "Metatarsal and toe fractures in children" and "Toe fractures in adults" and "Proximal phalanx fractures" and "Middle phalanx fractures" and "Distal phalanx fractures".) The treatment of toe and finger fractures is discussed separately. Proximal and middle phalanx fractures are managed similarly. Hand Middle phalanx.

type I - stable with no displacement; type II - unstable unicondylar; type III - unstable bicondylar or comminuted; neck fractures deformity is usually apex volar angulation .

Make diagnosis. 19 (See Figure 4.) The most commonly dislocated joint is the PIP joint. Dislocation of the foot joint affects the weight transmission through the arch of the foot. Login. Slightly flexed middle & distal phalanx with relaxed extensor tendons; Other features: Round regularly shaped mass of 2 nd metacarpal head on volar surface; Puckered skin on both sides of protruding mass – pathognomic; Concomitant fractures of metacarpal head or proximal phalanx in upto 50%; What is the difference between simple and complex MCP joint dislocation? Executive Editor. BACKGROUND. Radiographic features These fractures are generally well visualized on plain radiographs.