Gallimore CH, McConnell AJ, Zdero R, Koo H, McKee MD, Schemitsch EH. The effect of cement mixing time on the biomechanics of cement augmented plated fractures in canine femora.
J Orthop Trauma 2008;
22:637-42. [PMID:
18827594 DOI:
10.1097/bot.0b013e31817e49d1]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVE
The goal of this study was to determine the effect of cement mixing time and, hence, cement viscosity on the biomechanical behavior of femoral fracture fixation.
DESIGN
Cadaveric plated canine femoral fracture model, comparing treatments in matched pairs.
SETTING
Orthopaedic biomechanics laboratory.
INTERVENTION
Cement was inserted both as a liquid and as a paste in standard and oversized screw holes to augment fixation with plates and screws.
MAIN OUTCOME MEASUREMENTS
Standard 4-point bending tests were performed to obtain stiffness and failure load values.
RESULTS
Liquid cement had a 1.38 times increase in stiffness and a failure load 1.84 times greater compared with paste cement, regardless of hole size with a gap at the fracture site (P < 0.05). Liquid cement had a force to failure of 1.77 and 1.91 times in the standard-sized and oversized holes, respectively, when compared with paste cement (P < 0.05).
CONCLUSIONS
When the cement was inserted in a liquid state in a plated femoral diaphyseal fracture with a gap, screw purchase augmentation achieved greater bending stiffness and resisted a greater failure load.
Collapse