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Impact de l’opération de perçage sur l’intégrité des tissus osseux : modélisation et expérimentation

Abstract : Bone drilling is commonly practised in various surgical operations for orthosynthesis screws insertion or placement of dental and cochlear implants. During bone drilling procedure, the thermomechanical constraints resulting from the tool-bone interaction can damage the bone tissues in the vicinity of the drilling area. Thus, a significant increase in temperature can cause thermal osteonecrosis. It is therefore important to optimize the operating conditions (spindle speed and feed rate, geometry of the drill, drilling operation strategy ...) in order to reduce the risk of damage to bone tissues. To do this, it is necessary to analyse and understand the effects of cutting conditions on the mechanisms controlling the drill-bone interaction. The present work aims to contribute to the understanding of these mechanisms by combining an experimental approach with numerical and analytical modelling. The experimental study investigates the effect of the cutting speed, feed rate of the drill and the microstructure of the drilled area on the resulting cutting forces (thrust force and axial torque) and temperature rise during the drilling of porcine bone specimens and biomechanical test materials (Sawbones). These materials have the advantage of a uniform microstructure per given sample unlike bone. Numerical models of orthogonal cutting and bone drilling are implemented using the Finite Element code ABAQUS / Explicit. The purpose of this development is to analyse the influence of bone constitutive and damage laws on the model predictions (cutting mechanism, temperature and cutting forces). In order to propose a simplified approach, an analytical modelling based on moving heat source theory is developed for predicting bone thermal response. The relevance and limits of the approach proposed is shown through experimental validation.
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Submitted on : Saturday, October 17, 2020 - 12:01:21 PM
Last modification on : Friday, August 5, 2022 - 2:54:00 PM
Long-term archiving on: : Monday, January 18, 2021 - 6:11:24 PM


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  • HAL Id : tel-02970028, version 1


Foli Noël Amewoui Ekoue-Adjoka. Impact de l’opération de perçage sur l’intégrité des tissus osseux : modélisation et expérimentation. Mécanique des matériaux [physics.class-ph]. Université de Lorraine, 2020. Français. ⟨NNT : 2020LORR0095⟩. ⟨tel-02970028⟩



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