08/09/2026
TROCA 56 – Patient-specific trochlear resurfacing without screws
The same patient-specific TROCA concept can also be applied with a different method of fixation.
TROCA 56 is the screw-free version of the LimesVet TROCA system. Like TROCA 50, it is individually designed from the patient's CT data to match the distal femoral anatomy and provide an appropriately shaped trochlear surface for patellar tracking.
The key difference lies in how the implant is fixed to the bone.
Instead of cortical screws, TROCA 56 incorporates integrated lattice pins. Patient-specific drilling guides and cannulated drill bits are used to prepare the corresponding pin channels with controlled positioning. The implant is then seated onto the trochlea, where the lattice pins provide initial press-fit fixation and are designed to support subsequent bone ingrowth.
As with TROCA 50, reconstruction of the trochlear surface is achieved without a trochlear osteotomy.
However, treating patellar luxation requires more than addressing the trochlea alone. TROCA is therefore used as part of a whole-limb approach: the complete extensor mechanism and limb alignment are evaluated, and additional corrective procedures are incorporated into the surgical plan whenever indicated.
Patient-specific planning makes it possible to integrate these procedures into a single strategy—from trochlear resurfacing to tibial tuberosity transposition or correction of femoral or tibial deformities when required.