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Prevention of excessive medialisation of trochanteric fracture by a buttress screw: a novel method and finite element analysis

Mahaisavariya, B.; Chantarapanich, N.; Riansuwan, K.; Sitthiseripratip, K.

Journal of the Medical Association of Thailand 97 Suppl. 9: S127-S132

2014

ISSN/ISBN: 0125-2208
PMID: 25365905
Document Number: 14327
This paper proposes a novel method of using an antero-posterior buttress screw at the distal fragment just below the fracture site in conjunction with the sliding hip screw (SHS) to resist excessive femoral medialisation. A virtual assessment of the effectiveness of this new method was performed using the finite element analysis. The results indicate that the use ofa sliding hip screw (SHS) combined with a buttress screw can help resistfemoral medialisation better than using an SHS with no buttress screw. The von Mises equivalent stress (EQ ) was found to be in a safe range, which indicates increased integrity of the lateral wall with the addition of the buttress screw.

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