(245 days)
The patient-specific Bodycad Unicompartmental Knee System (Bodycad UKS) is indicated for unicompartmental knee arthroplasty (UKA) in patients with advanced knee osteoarthritis (OA) of the medial compartment with evidence of adequate healthy bone to support the implanted components. Candidates for unicompartmental knee replacement include those with:
· joint impairment due to osteoarthritis or traumatic arthritis of the knee,
- · varus deformity of the knee, and
- · as an alternative to tibial osteotomy in patients with unicompartmental OA.
The patient-specific Bodycad UKS components fit within an envelope of dimensions that are specific to each patient. The Bodycad UKS femoral component and tibial baseplate are intended for cemented fixation. The Bodycad screws must be used for fixation of the femoral and tibial components.
The Bodycad Unicompartmental Knee System (Bodycad UKS) is a patient-specific prosthesis that consists of femoral and tibial implants for replacement of the medial tibiofemoral compartment of the knee. The patient-specific femoral and tibial components and single-use cutting guides are manufactured from CAD and CAM files generated from validated Bodycad software, which are based on MRI or CT images of the patient's knee and input from the surgeon. The Bodycad UKS is for cemented use only. The Bodycad UKS is sterilized by gamma radiation.
Materials: CoCrMo (ASTM F1537-11) for the femoral component, Ti6Al4V ELI (ASTM F136-13) for the tibial component, UHMWPE (F648-14) for the tibial insert
The provided text describes a medical device, the Bodycad Unicompartmental Knee System, and its regulatory clearance. However, it does not contain information related to specific acceptance criteria, a study proving the device meets those criteria, or performance data in terms of metrics like sensitivity, specificity, or accuracy.
The "performance data" section states: "Validation testing was performed for CT and MRI imaging modalities and demonstrated substantial equivalence of the 3D digital bone models being equivalent for data extracted from CT and MR images." This indicates a technical validation of the 3D model generation process from imaging, not a clinical performance study with defined acceptance criteria for device efficacy or outcomes.
Therefore, I cannot fulfill your request to describe the acceptance criteria and the study that proves the device meets them based on the provided text, as this information is absent.
§ 888.3520 Knee joint femorotibial metal/polymer non-constrained cemented prosthesis.
(a)
Identification. A knee joint femorotibial metal/polymer non-constrained cemented prosthesis is a device intended to be implanted to replace part of a knee joint. The device limits minimally (less than normal anatomic constraints) translation in one or more planes. It has no linkage across-the-joint. This generic type of device includes prostheses that have a femoral condylar resurfacing component or components made of alloys, such as cobalt-chromium-molybdenum, and a tibial component or components made of ultra-high molecular weight polyethylene and are intended for use with bone cement (§ 888.3027).(b)
Classification. Class II.