Biomechanical Evaluation of 6.5-mm Cannulated Screws.
J Surg Orthop Adv
; 25(1): 8-12, 2016.
Article
em En
| MEDLINE
| ID: mdl-27082882
Although biomechanical and clinical evidence exists regarding smaller compression screws, biomechanical data regarding the larger headless screws are not currently available. Headed and headless 6.5-mm cannulated compression screws were examined, with analysis of interfragmentary compression, insertion torque, and resistance of the construct to a shear force. No significant differences were seen between the maximum insertion torque of the headless or headed screws. Maximum and steady-state compression forces were also not significantly different between groups. Countersinking the headless model 2 mm led to a 77.01% decrease in steady-state compression levels. Shear testing did not reveal any significant differences in peak load at ultimate failure, specimen stiffness, or final block displacement, although a trend to increased peak load and stiffness was seen with the headless specimens.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Parafusos Ósseos
/
Teste de Materiais
Limite:
Humans
Idioma:
En
Revista:
J Surg Orthop Adv
Assunto da revista:
ORTOPEDIA
Ano de publicação:
2016
Tipo de documento:
Article
País de publicação:
Estados Unidos