Mallet Fracture with Subluxation

Mallet finger injuries range from pure tendon rupture to tendon rupture with a fracture of the base of the distal phalanx. A type A mallet finger is a tendon rupture (Fig. 38—3), a type B is a chip fracture, a type C is an avulsion fracture without displacement, a type D is an avulsion fracture with displacement of the fragment (Fig. 38—4), and a type E has displacement of the avulsion fracture with subluxation of the distal phalanx. Type E fractures often require operative intervention. Forceful hyperflexion usually results in pure tendon ruptures or tendon ruptures with a small bone fracture.

In fractures involving articular surfaces, accurate anatomic reduction by surgery is usually required. For mallet fractures, satisfactory finger function may be regained despite mild arthrosis.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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