Biomechanical evaluation of a bioabsorbable expansion bolt for hamstring graft fixation in ACL reconstruction: an experimental study in calf tibial bone
Autor: | W. Plitz, L. Meyer, P. Strunk, G. Lob, R. Dieckmann, S. Piltz |
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Rok vydání: | 2005 |
Předmět: |
medicine.medical_specialty
Anterior cruciate ligament reconstruction medicine.medical_treatment Anterior cruciate ligament Bone Screws Tendons Fixation (surgical) Ultimate tensile strength medicine Animals Orthopedics and Sports Medicine Tibia Anterior Cruciate Ligament Graft fixation Orthodontics business.industry Anterior Cruciate Ligament Injuries Equipment Design General Medicine Plastic Surgery Procedures Biomechanical Phenomena Hindlimb Orthopedic Fixation Devices Surgery medicine.anatomical_structure Orthopedic surgery Cattle business Hamstring |
Zdroj: | Archives of Orthopaedic and Trauma Surgery. 125:577-584 |
ISSN: | 1434-3916 0936-8051 |
DOI: | 10.1007/s00402-005-0007-3 |
Popis: | Introduction: The purpose of our study was to evaluate and compare the primary fixation strength of a novel bioabsorbable two shell expansion bolt (EB) with that of a well-established interference screw-fixation technique in hamstring reconstruction of the anterior cruciate ligament. Materials and methods: Thirty calf tibia plateaus (age 5–6 months) were assigned to three groups: In group I (n=10) triple-stranded hamstring grafts were fixed with titanium interference screws (7 mm thread / 8 mm head × 25 mm). Specimens of group II (n=10) received bioabsorbable poly-L-lactide interference screws (8×23 mm). In group III (n=10), the grafts were fixed using bioabsorbable poly-D,L-lactide expansion bolts (5.8/8.5/10 mm × 35 mm). The tensile axis was placed parallel to the bone tunnel. The construction was then loaded until failure under a displacement rate of 1 mm per second. Results: There were no significant differences concerning the maximum pullout force (group I: 357 N ± 61; group II: 326 N ± 92; group III: 343 N ± 55). In case of the expansion bolt, we found the stiffness to be higher (61 N/mm) when compared to group I (48 N/mm), and group II (52 N/mm) (P |
Databáze: | OpenAIRE |
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