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At least 163 records · Page 9Linked to original sources
PubMed1995

Thoracolumbar burst fractures: evaluation with MR imaging.

PURPOSE: To determine the frequency of posterior ligamentous injury that occurs in patients with thoracolumbar burst fractures and to correlate ligamentous disruption with radiographic appearance. MATERIALS AND METHODS: Magnetic resonance (MR) imaging examinations of 21 patients with 25 thoracolumbar burst fractures were retrospectively evaluated to determine spinal ligament integrity. Radiographic and computed tomographic (CT) examinations were evaluated for interpediculate widening, midsagittal canal narrowing, posterior element fractures, and kyphosis; a radiographic assessment of posterior ligamentous integrity was made. These findings were then correlated with the status of the spinal ligaments. RESULTS: The patients were divided into two groups on the basis of the status of their supraspinous ligament (SSL). Six patients had disrupted SSLs, and 15 had intact SSLs. Radiographic and CT findings did not correlate with supraspinous ligament disruption. Radiographic indicators of posterior ligamentous disruption were present in only 33% of patients with SSL disruption. CONCLUSION: SSL disruption is a frequent occurrence in patients with burst fractures. No radiographic features of burst fractures correlate with SSL disruption, and radiographic signs of posterior ligamentous disruption are insensitive.

Adolescent↗
PubMedDate not supplied

Magnetic resonance imaging of the shoulder anatomy.

Magnetic Resonance represents the best method for shoulder study, since it enables us to emphasize all the parts making part of this area thanks to high anatomical details and a comprehensive view of it. Conventional radiographic techniques provide only limited evaluation of soft-tissue anatomy; ultrasonography, on the other hand, allows the visualization of tendons, synovial spaces and muscle fascicles but it is shown to be unfit above all for osseous structure evaluation: TC, finally, is not being employed at present in shoulder study.

Cartilage, Articular↗
PubMed1991

Histologic anatomy of the triangular fibrocartilage.

Histologic examination of the TFC reveals parallel, longitudinally oriented collagen fibers peripherally, while the more central articular disc is made up of interweaving obliquely oriented sheets of collagen fibers. This suggests a peripheral region experiencing tensile loads between the region of origin from the radius and the area of insertion into the ulna. The fiber orientation in the central region is more compatible with a structure experiencing multidirectional stresses. The articular disc origin from the radius is reinforced by collagen bundles projecting out from the radius for 1 to 2 mm. A large number of traumatic tears are oriented parallel to the radial origin of the TFC and located approximately 1 to 2 mm from the origin site. This corresponds to the junction of the short, radially oriented fibers and the remainder of the articular disc. The inner 80% of the articular disc is avascular, as is its radial attachment. Traumatic tears in this region would have a low healing potential unless some method for introducing additional vascularity was undertaken, such as reattachment through drill holes in the radius, allowing neovascularization of this otherwise avascular region.

Cartilage, Articular↗
PubMed1991

Arthroscopic treatment of TFCC lesions.

The TFCC bears axially applied load and stabilizes the distal radioulnar joint. Palmer's classification of TFCC lesions into traumatic and degenerative injuries allows a rational approach to treatment. Wrist arthroscopy provides both diagnostic and therapeutic capabilities in the treatment of these lesions.

Arthroscopy↗
PubMed1987

The distal radioulnar joint. Anatomy, biomechanics, and triangular fibrocartilage complex abnormalities.

The distal radioulnar joint plays an intricate part in the function of the wrist and thus in the function of the entire upper extremity. The radius and hand move in relation to and function about the distal ulna. Significant loads are transmitted to the forearm unit through the distal ulna via the triangular fibrocartilage complex. The anatomic relationships between the distal radius and ulna and ulnar carpus are precise, and even minor modification in these relationships leads to significant load changes and resultant pain syndromes. Evaluation of a patient with ulnar wrist pain is, at best, difficult. Despite a careful and thorough history and physical examination and the use of sophisticated ancillary diagnostic studies, some patients with distal radioulnar joint and ulnar carpal complex problems remain diagnostic and therapeutic mysteries. These patients are best followed; exploratory surgery is rarely satisfying to either the patient or the surgeon. Armed with an understanding of the normal anatomy and biomechanics, the examination of such a patient and subsequent treatment should become a challenge that is rewarding for both patient and treating physician.

Biomechanical Phenomena↗
PubMed1981

Wrist arthrography.

Wrist arthrography is an adjunctive procedure that may be valuable to the clinician. Although it is sensitive to particular abnormalities, it lacks the specificity to completely diagnose a given condition. Information gained by arthrography can be used a supportive evidence, in conjunction with clinical and laboratory findings, to aid in the management of individual patients.

Arthritis↗
PubMed1995

MR imaging of the triangular fibrocartilage complex.

This article describes in detail the anatomic components of normal triangular fibrocartilage complex (TFCC) and its MR appearance on high resolution MR images. It also describes pathologic processes of TFCC and its MR appearance.

Cartilage Diseases↗
PubMed1995

Complications of wrist arthroscopy and how to prevent them.

The incidence of complications related to wrist arthroscopy is unknown because of the small number of reported cases. Potential complications have been identified and are classified as (1) traction related; (2) complications incurred during the establishment of portals; (3) procedure-specific complications; and (4) miscellaneous. Techniques are described that may decrease the likelihood of each of these complications.

Arthroscopy↗
PubMed1994

Radiocarpal arthroscopy portals and normal anatomy.

Wrist arthroscopy is now an accepted technique in the evaluation of radiocarpal intra-articular pathology. An understanding of the surface anatomic landmarks and articular anatomy is required to safely and effectively perform the technique. Multiple portals are used to arthroscopically view the radiocarpal joint and provide access for irrigation and surgical instruments.

Arthroscopy↗