Feasibility study on the potential of a spiral blade in osteoporotic distal femur fracture fixation |
| |
Authors: | D Wähnert L Hofmann-Fliri M Götzen C Kösters M Windolf M J Raschke |
| |
Institution: | 1. Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Albert Schweitzer Campus 1, Buildung W1, 48149, Munster, Germany 2. AO Research Institute Davos, Clavadelerstr. 8, 7270, Davos, Switzerland
|
| |
Abstract: | Introduction Osteoporotic fractures of the distal femur (primary as well as periprosthetic) are a growing problem in today’s trauma and orthopaedic surgery. Therefore, this feasibility study should identify the biomechanical potential of a (commercially available) spiral blade in the distal femur as compared to a single screw without any additional plate fixation. Additionally, the influence of cement augmentation was investigated. Materials and methods An artificial low density bone model was either instrumented with a perforated spiral blade or a 5 mm locking screw only. Additionally, the influence of 1 ml cement augmentation was investigated. All specimens were tested with static pull-out and cyclic loading (50 to 250 N with an increment of 0.1 N/cycle). Results In the non-augmented groups, the mean pull-out force was significantly higher for the blade fixation (p < 0.001). In the augmented groups, the difference was statistically not significant (p = 0.217). Augmentation could increase pull-out force significantly by 72 % for the blade and 156 % for the screw, respectively (p = 0.001). The mean number of cycles to failure in the non-augmented groups was 12,433 (SD 465) for the blade and 2,949 (SD 215) for the screw, respectively (p < 0.001). In the augmented group, the blade reached 13,967 (SD 1,407) cycles until failure and the screw reached 4,413 (SD 1,598), respectively (p < 0.001). Conclusion The investigated spiral blade was mechanically superior, significantly, as compared to a screw in the distal femur. These results back up the further development of a distal femoral blade with spiral blade fixation for the treatment of osteoporotic distal femur fractures. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|