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Journal of Long-Term Effects of Medical Implants
SJR: 0.332 SNIP: 0.491 CiteScore™: 0.89

ISSN Print: 1050-6934
ISSN Online: 1940-4379

Journal of Long-Term Effects of Medical Implants

DOI: 10.1615/JLongTermEffMedImplants.v21.i4.10
pages 261-267

Finite Element Method in Internal and Hybrid External Fixation of Tibial Condylar Fractures: A Comparative Application Study

Apostolia Malakasi
Second Department of Orthopaedics, University of Athens Medical School, Athens, Greece
Stergios N. Lallos
Second Department of Orthopaedics, University of Athens Medical School, Athens, Greece
Mavridis Christos
School of Mechanical Engineering, National Technical University of Athens, Athens, Greece
Demetrios S. Korres
Second Department of Orthopaedics, University of Athens Medical School, Athens, Greece
Nikolaos E. Efstathopoulos
Second Department of Orthopaedics, Athens University Medical School, Athens, Greece

ABSTRACT

The treatment of tibial condylar fractures requires the preparation of personalized treatment, customized to the needs of the patient, that will take into consideration his or her personal activities. The purpose of the present study was (1) the development, by using the finite elements method, of a 3-dimensional, highly discrete, simulation model of the knee−tibia, (2) the creation of 6 types of fractures in this model according to Schatzker's classification, (3) the insertion of materials for internal and hybrid external fixation, (4) the recording of the model's biomechanical behavior during the load, and (5) the discovery of findings regarding the stability of the internal and hybrid external treatment methods. The results from the resolution procedure showed that the values of maximum displacements in every fracture type except type III were reduced in the models with internal fixation. This means decreased stiffness and therefore diminished stability of the hybrid external−bone complex in these types of fractures. Internal fixation provides postoperative stability, a basic precondition for accelerated fracture healing.