Carpal dislocations: pathomechanics and progressive perilunar instability.
نویسندگان
چکیده
The pathomechanics, ligamentous damage, and degree of carpal instability in perilunate and lunate dislocations were analyzed by experimentally loading 32 cadaver wrists to failure. Thirteen perilunate and two lunate dislocations were produced. The mechanism of injury was extension, ulnar deviation, and intercarpal supination. These dislocations occurred in a sequential fashion due to progressive and specific ligamentous disruptions and were classified according to the degree of perilunar instability (PLI). Stage I perilunar instability (scapholunate diastasis) had the least degree of carpal instability. Lunate dislocations (stage IV PLI) had the highest degree of carpal instability. Radial styloid fractures were produced in seven as a result of avulsion. Scaphoid rotation was created in eight and was due to rupture of the radioscaphoid and scapholunate ligaments. Reduction was accomplished by reversing the mechanism of injury--that is, intercarpal pronation, radial deviation, and palmar flexion. Stress roentgenograms employing longitudinal carpal compression in radial and ulnar deviation were helpful in determining the degree of associated carpal instability.
منابع مشابه
In brief: Mayfield et al. Classification: carpal dislocations and progressive perilunar instability.
According to Melsom and Leslie, the earliest description of perilunate dislocation was by Malgaigne in 1855, before the advent of radiography [7]. It later was described by Cousins, Destot, de Quervain, and others [7]. According to Melsom and Leslie [7] Tavernier reported the first series in 1906. Many years later, in 1968, the concept of the proximal row as an intercalated segment was describe...
متن کاملLunate and Perilunar Dislocations.
In his treatise on joint injuries Astley Cooper (1832) included only one example of carpal dislocation. Speed (1950) estimated that carpal fractures and dislocations comprised oneeighth of injuries about the wrist. Although they are so common carpal dislocations are often unrecognised or mismanaged (Watson-Jones 1946, Cave 1958, McLaughlin 1959, Wade 1960). There is still disagreement about the...
متن کاملGreater arc injury of the wrist with fractured lunate bone: a case report.
Carpal dislocation and fracture dislocation are uncommon and difficult to treat. Early diagnosis and treatment of such injuries are necessary to prevent progressive carpal instability and traumatic arthritis. Perilunate fracture dislocation is a combination of ligamentous and osseous injuries that involve the 'greater arc' of the perilunate. Despite being severe, these injuries often go unrecog...
متن کاملScrew fixation in the management of the fractured carpal scaphoid.
Although most recent fractures of the carpal scaphoid unite with immobilisation in a well-fitting plaster, some fail to do so within a reasonable time, say three months. Fractures associated with perilunar dislocation are particularly prone to delay. For these, as well as for fractures showing delayed union or non-union, internal fixation provides a speedy return to activity. Over a period of t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- The Journal of hand surgery
دوره 5 3 شماره
صفحات -
تاریخ انتشار 1980