Fixed-angle screws vs standard screws in acetabular prosthesis fixation: a cadaveric biomechanical study.
J Arthroplasty
; 24(5): 806-14, 2009 Aug.
Article
em En
| MEDLINE
| ID: mdl-18639433
ABSTRACT
Secure fixation of acetabular components in total hip arthroplasty can be challenging. The purpose of this study was to perform biomechanical analysis of cup fixation strength using fixed-angle vs standard screw fixation. Multihole, porous-backed acetabular prostheses were implanted in both acetabuli of 8 cadaveric pelves using standard press-fit techniques. Fixed-angle screws were used on the left side, and standard cancellous screws were used in the right. The use of fixed-angle screws enhanced acetabular fixation substantially under subfailure cyclic loading conditions and load-to-failure. The triradiate screw configuration increases the bending moment required to fail the specimens as well. Fixed-angle screws may be useful for achieving rigid fixation of acetabular prostheses in challenging clinical scenarios.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Parafusos Ósseos
/
Artroplastia de Quadril
/
Prótese de Quadril
/
Acetábulo
Limite:
Humans
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article