Neglected congenital dislocation of the hip. Role of computed tomography and computer-aided design for total hip arthroplasty.
J Arthroplasty
; 11(8): 893-8, 1996 Dec.
Article
en En
| MEDLINE
| ID: mdl-8986566
Computed tomography (CT) provides important three-dimensional anatomic details in congenital dislocation of the hip that are useful for total hip arthroplasty (THR) and are not obtainable with conventional radiographic evaluation. In this study, 84 patients (119 hips) with congenital dislocation of the hip were evaluated with CT before surgery. Specifically, both the acetabulum and the femur were analyzed to make the best selection of the prosthesis. The average anteversion of the acetabulum was 23 degrees, with an opening of 30.9 mm and a depth of 14.7 mm. The bone stock of the true acetabulum was calculated and the average available diameter for the acetabular implant was 44.9 mm. The CT topogram revealed the true leg-length discrepancy (average 0.5-1.9 cm), and the amount of a shortening osteotomy when necessary was determined. Finally, to determine the stem with optimum fit and fill, a three-dimensional reconstruction of the femoral canal using CT data and computer-aided design (CAD) was matched with a three-dimensional geometry of several stem designs and sizes obtained from a CAD system.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Tomografía Computarizada por Rayos X
/
Diseño Asistido por Computadora
/
Luxación Congénita de la Cadera
/
Prótesis de Cadera
Tipo de estudio:
Etiology_studies
Límite:
Humans
Idioma:
En
Revista:
J Arthroplasty
Asunto de la revista:
ORTOPEDIA
Año:
1996
Tipo del documento:
Article
País de afiliación:
Grecia
Pais de publicación:
Estados Unidos