Impact of fractured tibia implant fixation devices on bone stiffness during bending test.
Med Eng Phys
; 131: 104228, 2024 09.
Article
de En
| MEDLINE
| ID: mdl-39284654
ABSTRACT
This study focuses on evaluating the failure resistance of a previously reduced tibia with internal fixation implants as PLate (PL) or InterMedullary Nail (IMN), subjected later to a tibial lateral trauma. To replicate this type of trauma, which can be caused by a road accident, a three-point bending test is considered using experimental tests and numerical simulations. The withstand evaluation of the tibia-PL and tibia-IMN structures was conducted by following the load transfer through, the bone and the used implants. The analysis, up to tibia failure, required the use of an elasto-plastic behavior law coupled to damage. The model parameters were identified using experimental tests. Il was shown that the tibia-IMN structure provided a bending resistant load up to three-times higher than the tibia-PL. In fact, the used screws for plate fixation induced a high level of stress in the vicinity of threaded region, leading to a crack initiation and a damage propagation. However, in tibia-IMN structure the highest stress was generated in the trapped zone between the loader and the nail, promoting crack formation. From a biomechanical point of view, the structure with IMN is safer than the structure with PL, whose fixation induces earlier damage in bone.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Tibia
/
Fractures du tibia
/
Test de matériaux
Limites:
Humans
Langue:
En
Journal:
Med Eng Phys
Sujet du journal:
BIOFISICA
/
ENGENHARIA BIOMEDICA
Année:
2024
Type de document:
Article
Pays de publication:
Royaume-Uni