A Biomechanical Comparison of Plate Configuration in Distal Humerus Fractures
| Autor: | Arshad Khaleel, Thomas M Pinto, Iain A R MacLeod, Magnus W T Arnander, Alexander Reeves |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Humeral Fractures
Compressive Strength medicine.medical_treatment Bone Screws Bending Models Biological Fracture Fixation Internal Fixation (surgical) Materials Testing medicine Perpendicular Humans Internal fixation Orthopedics and Sports Medicine Humerus Pliability Orthodontics Osteosynthesis business.industry Equipment Design General Medicine Medial supracondylar ridge Anatomy Sagittal plane medicine.anatomical_structure Surgery business Bone Plates |
| Zdroj: | Journal of Orthopaedic Trauma. 22:332-336 |
| ISSN: | 0890-5339 |
| DOI: | 10.1097/bot.0b013e31816edbce |
| Popis: | OBJECTIVES Our aim was to test the hypothesis that two plates placed parallel to each other are stronger and stiffer than plates placed perpendicular to each other for fixation of a distal humerus fracture model. METHODS We created an artificial distal humeral fracture model by osteotomizing two groups of identical epoxy resin humera. Screw and plate constructs were built to mimic osteosynthesis. In the first group, 3.5-mm reconstruction plates were placed parallel to each other along each of the medial and lateral supracondylar ridges. In the second group, 3.5-mm reconstruction plates were placed perpendicular to each other with a medial supracondylar ridge plate and a posterolateral plate. Stiffness and strength data of the two constructs were obtained by testing to failure with sagittal plane bending forces. RESULTS The parallel plate group (n = 7) had a mean stiffness of 214.9 +/- 43.3 N/mm and a mean strength of 304.4 +/- 63.5 N. The perpendicular plate group (n = 8) had a mean stiffness of 138.3 +/- 44.6 N/mm and a mean strength of 214.9 +/- 43.3 N. These differences were significant (Student's t test, P < 0.05). CONCLUSIONS As theoretically expected, a parallel plate configuration is significantly stronger and stiffer than a perpendicular plate configuration when subjected to sagittal bending forces in a distal humerus fracture model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|