Essential Radiographic Evaluation for Distal Radius Fractures

医学 射线照相术 畸形 还原(数学) 关节面 外科 口腔正畸科 几何学 数学
作者
Robert J. Medoff
出处
期刊:Hand Clinics [Elsevier]
卷期号:21 (3): 279-288 被引量:279
标识
DOI:10.1016/j.hcl.2005.02.008
摘要

Fractures of the distal radius can be complex injuries, often generating multiple fragments with distortion of the normal anatomy in all three dimensions. Superficial assessment of the injury on the standard PA and lateral radiographs often can result in incomplete recognition of the injury pattern and a misdirected approach to treatment. In addition, failure to recognize subtle radiographic findings may result in the acceptance of a reduction that has significant residual incongruency and articular surface disruption. Standard radiographs of the distal radius can provide a wealth of information about the topography of the bone if the surgeon knows what to look for. The ability to recognize detailed landmarks and parameters on the radiographic images and convert this information into a three-dimensional visual image is a skill that requires education and training. As more aggressive treatments have emerged for anatomic restoration of the bony and articular anatomy, accurate identification of the pattern of injury has become essential. Parameters such as the tear drop angle, AP distance, and articular separation have been recognized only recently. Because these parameters reflect the congruency of the articular surface,it would be natural to assume that postreduction films in which these parameters are abnormal would compromise clinical outcome. Because nearly all historical studies do not include routine evaluation of these parameters, knowledge of radiographic correlation with clinical outcome is still incomplete. At the same time, previous studies to assess outcome of distal radius fractures may be compromised by the failure to recognize residual deformity and articular incongruency that would have been evident with measurement of these parameters. With careful understanding of the radiographic landmarks, radiographic parameters, and patterns of injury, the surgeon can visualize a more accurate picture of the fracture itself and the reduction. As a result, treatment decisions for distal radius fractures can be based on a more thorough understanding of the anatomy of the injury, and future grading of radiographic results may reflect more accurately the precision of the articular restoration.
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