Biomechanical Analysis of Proximal Fitting-Distal Filling Stem and Proximal Fitting- Distal Tapered Stem in Cementless Hip Prosthesis: A 3 Dimensional Finite Element Study / 대한정형외과학회잡지
The Journal of the Korean Orthopaedic Association
;
: 279-286, 2001.
Artigo
em Coreano
| WPRIM
| ID: wpr-648997
ABSTRACT
PURPOSE:
This study was undertaken to compare the initial micromotion and stress shielding of a "fit and fill" stem to a "proximal fitting and distal tapered" stem in the early postoperative period using the load simulating single leg stance and stair climbing. MATERIALS ANDMETHODS:
Using the data from 3-D human CT scan, authors developed two types of 3-dimensional finite element total hip replacement model of proximal femur, which were inserted with a "fit and fill" stem and a "proximal fitting and distal tapered" stem. The constructions of stems were based on the OmnifitTM stem (about 13,000 element & 20,000 nodes). We compared micromotion, maximal principal stress and strain energy of each stems.RESULTS:
The results indicate that micromotion in a fit and fill stem were slightly lower than that of a tapered stem, especially in stair climbing over that in the single leg stance. The maximum principal stress on the cortex of femur was slightly higher in a tapered stem in the case of single leg stance, and 2 times higher in the case of stair climbing. Strain energy also was much higher in a tapered stem in both single leg stance and stair climbing gait.CONCLUSION:
These findings indicate that a tapered stem design could provide more favorable biomechanical benefits rather than a fit & fill stem after cementless total hip replacement.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Período Pós-Operatório
/
Tomografia Computadorizada por Raios X
/
Artroplastia de Quadril
/
Fêmur
/
Marcha
/
Quadril
/
Prótese de Quadril
/
Perna (Membro)
Tipo de estudo:
Estudo prognóstico
Limite:
Humanos
Idioma:
Coreano
Revista:
The Journal of the Korean Orthopaedic Association
Ano de publicação:
2001
Tipo de documento:
Artigo
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