Sixteen fresh-frozen adult human cadaveric upper extremities were used in a biomechanical analysis of distal radioulnar joint (DRUJ) stability. The relative contribution to stability of the DRUJ by the surrounding anatomic structures presumed to stabilize the joint was analyzed with respect to forearm rotation and wrist flexion and extension using a purpose-built 4-axis materials testing machin...

INTRODUCTION Ulnar variance affects the force distribution across the wrist and is related with some ulnar pathologies. Ulnar minus variance is associated with Kienböck’s disease, whereas ulnar plus variance plays an important role in triangular fibrocartilage complex (TFCC) tear and ulnar impaction syndrome. Ulnar variance is measured based on plain radiograph. However, plain radiograph shows ...

BACKGROUND AND PURPOSE The current literature contains no reports of treatment options other than surgery following failed conservative management of a triangular fibrocartilage complex (TFCC) tear. The purpose of this study is to describe the use of a novel brace as a non-surgical intervention for TFCC tears. METHODS This paper is a case study of a subject with a magnetic resonance imaging-c...

Injury to the distal radioulnar joint (DRUJ) is well recognised in association with fractures of the distal radius and ulna. Damage to the articular disc or, more correctly, the triangular fibrocartilage complex of the joint, occurring at the time of injury, is now well recognised as a major cause of persistent symptoms following Colles' fracture.' Isolated injury to the distal radioulnar artic...

Ulnar sided wrist pain is a common site for upper extremity disability. Ulnar impaction syndrome results in a spectrum of triangular fibrocartilage complex (TFCC) injuries and associated lunate, triquetrum, and ligamentous damage. Patients commonly present with insidious ulnar sided wrist pain and clicking, and a history of trauma or repetitive axial loading and rotation. In this case series, t...

PURPOSE To measure the effects of distal radius malalignment on loading at the distal ulna. METHODS Using an adjustable mechanism to simulate angulated and translated malalignments, clinically relevant distal radius deformities were simulated in a cadaveric model. A custom-built load cell was inserted just proximal to the native ulna head to measure the resultant force and torque in the dista...

We describe the case of a 13-year-old patient with a left wrist physeal fracture of the ulna and radius. X-Ray showed a Salter-Harris type II injury of the radius, and CT and MRI identified the following: type II epiphysiolysis of the radius with a metaphyseal wedge and type IV fracture of the ulna, with interposition in the focus of the fracture of the extensor carpi ulnaris tendon, as well as...

From September 1996 to September 2001, 37 adult patients were diagnosed with chronic triangular fibrocartilage complex (TFCC) tears with distal radioulnar joint (DRUJ) instability in our clinic. They had all received the procedure of TFCC reconstruction with partial extensor carpi ulnaris (ECU) combined with or without ulnar shortening. There were 36 males and one female in the study with a mea...

In the diagnosis of ulnar wrist pain, physical examinations including provacative tests are primary elements in identifying the site and nature of ulnar wrist pain. Imagings techniques are helpful for diagnosing occult fractures and distal radioulnar subluxation, but unsatisfactory for diagnosing ulnocarpal impaction syndrome, tears of the triangular fibrocartilage complex and lunotriquetral li...

PURPOSE To evaluate high-resolution MRI of the triangular fibrocartilage complex (TFCC) at 3T using a surface coil (SC) or volume coil (VC). MATERIALS AND METHODS MRI was obtained from nine volunteers in the supine position with a 3-inch SC and in prone position with a transmit-receiver wrist VC at 3 T. Coronal two-dimensional-gradient echo (2D-GRE) images (TR/TE/FA = 500 msec/15 msec/40 degr...