Advisor(s)
Abstract(s)
The material removal through the drilling involves two important processes. The first one is
the drilling of material by cutting edges of the drill bit and the second is the friction generated
by the contact between the drill bit and the hole wall of the material. Both processes lead to
heat generation during drilling. In clinical practice, drilling procedures with high-speed
cutting tools are often applied on bone tissue. These operations are associated to
complications such as thermal osteonecrosis due to the excessive heat generation and
mechanical damage due to the excessive levels of penetration force. The development of
additional tools for accurately simulate the drilling is essential to predict the risk of thermomechanical
damage during bone drilling. This paper investigates the thermal and mechanical
damage in bone tissue induced by different parameters. An experimental and numerical
approach of bone drilling has been conducted. A three-dimensional dynamic numerical model
was developed to predict the thermo-mechanical stress generated during the drilling. The
numerical model incorporates the geometric and dynamic characteristics involved in the
drilling processes, as well the developed temperature inside the material. The numerical
analysis has been validated by experimental tests using polyurethane foam materials with
similar mechanical properties to the human bone.
Description
Keywords
Bone drilling Damage Finite element analysis Temperature
Citation
Fernandes, M.G.A.; Fonseca, E.M.M.; Jorge, Renato N. (2016). Influence of bone drilling parameters on the thermal stress distribution. In 5th International Conference on Integrity-Reliability-Failure IRF2016. Porto. p. 517-528. ISBN 978-989-98832-5-3