[BIOMECH] - Effect of metaphyseal cones in revision total knee arthroplasty
Effect of metaphyseal cones in revision total knee arthroplasty
Prof. Bernardo Innocenti, PhD
T: 02 650 35 31
Location : UB3 – 169
Email : bernardo [dot] innocenti [at] ulb [dot] ac [dot] be
Context of the project:
The goal of revision total knee arthroplasty (TKA) is to produce a stable, painless knee with proper lower limb alignment and joint line levels. Bone loss and subsequent defects are often encountered in the revision of total knee arthroplasty (TKA) and occasionally in primary total knee arthroplasty because of previous bone resections, migration of hardware, osteolysis, or difficult extraction of components, infection or periprosthetic fracture (figure 1).
Nowadays, various options are offered by industry for managing these defects. Treatments for bone defects include bone cement, bone cement with screw reinforcement, metal augments, impaction bone grafts, structural allografts, and tantalum, depending on the location and size of the defects (figure 2).
Recently, metaphyseal cones were introduced to compensate for bone loss and to guarantee implant stability (figure 3). However, their biomechanical behaviour is still unknown.
The aim of the activities is to perform an industrial review to check the different option currently available on the market and to investigate the biomechanics of such tibial cones when they are inserted in a tibial bone. The results, in terms of bone stress, will be compared with the one extracted in a conventional bone, used as control, in which no cone will be inserted.
The study will be performed using finite element analysis.
Figure 1 example of a bone defect after knee arthroplasty revision.
Figure 2 example of Bone augments
Figure 3 example of metaphyseal cone