Biomedical subjects

David M Lichtman

Publications and source records attributed to David M Lichtman.

4 recordsLinked to original sources

PubMed2006

Understanding midcarpal instability.

This article outlines the historical development of midcarpal instability observations and terminology and places them in the broader context of currently accepted theories of wrist pathomechanics. Such an understanding may help resolve the following questions: Are there 1 or more entities under the current designation of midcarpal instability? What are the underlying pathogenesis and pathomechanics of the disorder(s)? What are the recommended treatment options? What further research needs to be done to better answer these questions?

Carpal Joints↗

PubMed2005

Spontaneous wrist fusion: an unusual complication of Kienböck's disease.

We report a case of spontaneous wrist fusion occurring in a patient with magnetic resonance image (MRI)-proven stage 1 Kienböck's disease. The purpose of this case report is to make hand surgeons aware of this potential finding and to alert hand surgeons and radiologists that diffuse MRI changes of the lunate may not necessarily be pathognomonic for Kienböck's disease.

Adolescent↗

PubMed2003

Acute injuries of the distal radioulnar joint and triangular fibrocartilage complex.

Distal radioulnar joint disorders have become increasingly recognized. Over the past decade, advances in functional anatomy, kinematics, advanced imaging, and arthroscopy have improved understanding of distal radioulnar joint disorders and their management. In the past, injuries to the triangular fibrocartilage complex and distal radioulnar joint have been regarded as related but separate entities. The authors' classification and treatment algorithm perceives these injuries as a single entity, differing only in their progressively severe anatomic pathology and subsequent clinical manifestations. A discussion of pertinent anatomy, clinical characteristics, ancillary studies, and a new classification system help establish recommended management options of this disorder.

Carpal Bones↗

PubMedDate not supplied

Plating of the distal radius.

Distal radius fractures are common injuries that can be treated by a variety of methods. Restoration of the distal radius anatomy within established guidelines yields the best short- and long-term results. Guidelines for acceptable reduction are (1) radial shortening < 5 mm, (2) radial inclination > 15 degrees , (3) sagittal tilt on lateral projection between 15 degrees dorsal tilt and 20 degrees volar tilt, (4) intra-articular step-off < 2 mm of the radiocarpal joint, and (5) articular incongruity < 2 mm of the sigmoid notch of the distal radius. Treatment options range from closed reduction and immobilization to open reduction with plates and screws; options are differentiated based on their ability to reinforce and stabilize the three columns of the distal radius and ulna. Plating allows direct restoration of the anatomy, stable internal fixation, a decreased period of immobilization, and early return of wrist function. Buttress plates reduce and stabilize vertical shear intra-articular fractures through an antiglide effect, where-as conventional and locking plates address metaphyseal comminution and/or preserve articular congruity/reduction. With conventional and locking plates, intra-articular fractures are directly reduced; with buttress plates, the plate itself helps reduce the intra-articular fracture. Complications associated with plating include tendon irritation or rupture and the need for plate removal.

Bone Plates↗