Biomechanical Comparison of the Bioabsorbable RetroScrew System, BioScrew XtraLok with Stress Equalization Tensioner, and 35-mm Delta Screws for Tibialis Anterior Graft-Tibial Tunnel Fixation in Porcine Tibiae
| Autor: | David N.M. Caborn, Haw Chong Chang, Akbar Nawab, John Nyland, Robert Burden |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Adult
Swine Bone Screws Physical Therapy Sports Therapy and Rehabilitation Tendons 03 medical and health sciences 0302 clinical medicine Absorbable Implants Materials Testing medicine Animals Humans Transplantation Homologous Orthopedics and Sports Medicine Tibia Fixation (histology) Bone mineral 030222 orthopedics Tibial tunnel business.industry Anterior Cruciate Ligament Injuries Soft tissue 030229 sport sciences Anatomy Biomechanical Phenomena Tendon Equipment Failure Analysis Bone screws Transplantation medicine.anatomical_structure Nuclear medicine business |
| Zdroj: | The American Journal of Sports Medicine. 33:1057-1064 |
| ISSN: | 1552-3365 0363-5465 |
| DOI: | 10.1177/0363546504272265 |
| Popis: | Background Achieving effective soft tissue graft-tibial tunnel fixation remains problematic. Hypothesis No differences would exist for tibialis anterior graft-tibial tunnel fixation when comparing the RetroScrew System (20-mm retrograde screw, 17-mm antegrade screw), the 35-mm tapered Delta Screw (manual tensioning), and the 35-mm BioScrew XtraLok (applied using an instrumented tensioner). Study Design Controlled laboratory study. Methods Porcine tibiae (apparent bone mineral density, 1.3 g/cm2) and human tendon allografts were divided into 3 matched groups of 6 specimens each before cyclic (500 cycles, 50-250 N, 1 Hz) and load-to-failure (20 mm/min) tests. Results The BioScrew XtraLok (210.9 ± 54.9 N/mm) and the 35-mm Delta Screw (224.3 ± 43.7 N/mm) displayed superior stiffness to the RetroScrew System (114.1 ± 23.3 N/mm) (P =. 0004) during cyclic testing. The BioScrew XtraLok (1.0 ± 0.2 mm) and the Delta Screw (0.9 ± 0.2 mm) also displayed less displacement during cyclic testing than the RetroScrew System (1.8 ± 0.5 mm) (P =. 001). During load-to-failure testing, the BioScrew XtraLok withstood greater loads (1436.3 ± 331.3 N) (P =. 001) and displayed greater stiffness (323.6 ± 56.8 N/mm) (P =. 002) than the 35-mm Delta Screw (load, 1042.2 ± 214.4 N; stiffness, 257.2 ± 22.2 N/mm) and the RetroScrew System (load, 778.7 ± 177.5 N; stiffness, 204.4 ± 52.9 N/mm). Conclusion The BioScrew XtraLok with instrumented tensioning displayed superior fixation to the RetroScrew System and the 35-mm Delta Screw applied with manual tensioning. Clinical Relevance The BioScrew XtraLok may provide superior soft tissue graft-tibial tunnel fixation. Further in vitro studies using human tissue and in vivo clinical studies are needed. |
| Databáze: | OpenAIRE |
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