dc.contributor |
Terrier, Alexandre |
dc.contributor.author |
Molins Cabaní, Sara |
dc.date |
2012 |
dc.identifier.uri |
http://hdl.handle.net/2099.1/21452 |
dc.language.iso |
eng |
dc.publisher |
Universitat Politècnica de Catalunya |
dc.publisher |
École polytechnique fédérale de Lausanne |
dc.rights |
Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.rights |
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject |
Àrees temàtiques de la UPC::Ciències de la salut::Medicina::Ortopèdia |
dc.subject |
Àrees temàtiques de la UPC::Enginyeria biomèdica::Biomecànica |
dc.subject |
Ankle -- Movements –- Mathematical models |
dc.subject |
Prosthesis |
dc.subject |
Human mechanics |
dc.subject |
Bones -- Mechanical properties |
dc.subject |
Turmells -– Moviments -– Models matemàtics |
dc.subject |
Pròtesis| |
dc.subject |
Mecànica humana |
dc.subject |
Ossos -- Propietats mecàniques |
dc.title |
Bone Strain in a Stair Climbing Movement using Numerical Modeling for a Total Ankle Replacement |
dc.type |
info:eu-repo/semantics/bachelorThesis |
dc.description.abstract |
The ankle is a complex joint of the human body which is most often affected
by trauma. Osteoarthritis is a joint disease that can require surgical intervention
and when it affects the ankle there are two options to achieve pain relief. For
years ankle fusion has been the most common technique but it entails a huge
reduction of the ankle joint. This last decades the trending to total ankle
replacement (TAR) to deal with that disease has increased. However, the longterm
results are far away from the success of other joint replacements like the
knee or the hip.
The complexity of the ankle joint makes difficult to predict and to know
what causes the failure of the replacement. Therefore, a numerical model that
includes mainly the bones of the ankle joint and the prosthetic elements is
created. Then two different kind of prosthesis are compared using the same
model. Finally, in order to test how the ankle acts for a daily life movement,
another model performing a phase of the ascent of stairs cycle is created. This
last model guides the movement by the contraction of the triceps surae muscle.
Results show that the bone strain levels differ a lot depending on the geometry
of the prosthesis tested being more recommendable the tibial implant that is
designed with an horizontal keel because it leads to a more uniform distribution
of the load. For all the simulations the tibia is the most affected bone and the
strain results surpass the limit established in some cases. For the climbing stairs
simulation none of the elements surpass the strain limits. Even so, the failure
of the TAR may not be only related to the deformation of the bone as there are
other non-prosthetic issues that can affect the success of it.
This is the first time that a musculoskeletal model of the ankle has been
developed in order to study a prosthetic joint. Even though improvements are
needed to make the model more complete and reliable it has been shown that
it is useful to obtain the behaviour of the joint and to assess different implant
designs. |
dc.description.abstract |
Outgoing |