Elastomer femoroplasty prevents hip fracture displacement

• Published in: Clinical biomechanics (Bristol) Vol. 26; no. 5; pp. 464 - 469
• Main Authors: van der Steenhoven, T.J, Schaasberg, W, de Vries, A.C, Valstar, E.R, Nelissen, R.G.H.H
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-06-2011
• Subjects: Cadaver; Elastomer; Femoroplasty; Femur; Fracture; Hip; Key hole; Minimal invasive; PDMS; Physical Medicine and Rehabilitation; Prevention; Prevention; Femur; Femoroplasty; Elastomer; Fracture; Minimal invasive; Key hole; Hip; Cadaver; PDMS
• ISSN: 0268-0033; 1879-1271
• DOI: 10.1016/j.clinbiomech.2010.12.009

Abstract The purpose of this study was to test femur strength and the ability to prevent fracture displacement of two minimal invasive Elastomer femoroplasty techniques. Methods A total of sixteen fixed human cadaveric femur pairs were used. From each pair one femur was randomly assigned for Elastomer femoroplasty. In these femora we drilled a 3.5 mm entrance in the lateral cortex. Cavities for the Elastomer were created by: group A, balloon and group B an excentric drill. All femora were fractured by simulating a fall on the greater trochanter. Neck-shaft-angles on plain anterior posterior radiographs were measured to determine fracture displacement. Findings There was no significant difference in fracture load between controls and treated femora for group A, 2904 N (SD 1091) versus 2803 N (SD 627) and group B, 2773 N (SD 747) versus 2597 N (SD 834). In group A the mean displacement was 35° (SD 14) for the control femora and 3° (SD 2) for the treated femora ( P < 0.001). In group B the mean displacement was 38° (SD 10) for the controls and 8° (SD 13) for the treated femora ( P < 0.001). Interpretation The results of this study show that minimal invasive Elastomer femoroplasty prevents fracture displacement of the proximal femur. We found no significant compromise in load-to-fracture after minimal invasive balloon or excentric drill femoroplasty.