iUni^� Unicompartmental Knee Resurfacing Device

The iUni unicompartmental resurfacing device is an FDA cleared and CE Marked implant designed for patients with arthritic damage isolated to either the medial or lateral tibiofemoral compartment of the knee. Together with the iDuo, the iUni provides surgeons with a range of partial knee resurfacing options.

How it Works

The patient-specific iUni is designed from a CT scan of an individual patient's knee using the ConforMIS iFit technology. The iFit design process interactively maps the diseased area and defines the extent of misalignment present in the knee. Using the patient-specific bone geometry, iFit defines the shape and size of the femoral and tibial components as well as the disposable instrumentation.

The cobalt chrome femoral component conforms to the surface of the patient's femoral condyle, replacing the damaged cartilage with a smooth articulating surface. Because of its patient-specific conformity to the subchondral bone, it is a true resurfacing product, requiring only cartilage removal and one small posterior bone cut. The weight bearing portion of the subchondral plate is kept intact.

The geometry of the tibial implant is specified to provide full cortical rim coverage on the tibia, potentially reducing the risk of implant subsidence and loosening. After proper MCL tensioning using the iJig patient-specific instrumentation, a small amount of the tibial plateau is removed to receive the implant.

iUni Features

Available for the medial or lateral compartment
Preserves bone and future surgical options
Minimally invasive, minimally traumatic procedure
Precise fit to ensure ROM without impingement or overhang
Complete cortical rim coverage to reduce risk of tibial implant subsidence and loosening
Anatomic component alignment to reduce implant wear
Disposable, patient-specific iJig instrumentation with built-in image guidance
Simple, reproducible surgical technique
Potential for less post-operative pain and shorter post-operative recovery time

Who is a Candidate

The iUni was developed for patients with arthritic damage isolated to either the medial or lateral tibiofemoral compartment of the knee, with little to no damage in the patellofemoral compartment.

The bone and cartilage preserving features of the iUni may be especially valuable for young and active patients who are considered too early for traditional knee replacement, but who suffer from arthritis. The iUni allows the patient to preserve their joint for future surgery options, while receiving an implant with the potential to prevent or delay the need for a more invasive surgery.

Indications

The ConforMIS iUni is intended for use in one compartment of the osteoarthritic knee, to replace the damaged area of the articular surface in patients with evidence of adequate healthy bone to support the components.

Candidates for unicondylar knee repair include those with joint impairment due to osteoarthritis or traumatic arthritis of the knee; previous tibial condyle or plateau fracture, creating loss of function; and valgus or varus deformity of the knee.

Contraindications