Zimmer Unicompartmental High Flex Knee System
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Multi-Approach Instrumentation – Delivering True Surgeon Choice
Comprehensive Sizing – Patient-Specific Results
High Flex Solutions for the MIS era
Built on Success
In today’s health care environment, meeting patient demands means building on proven concepts while expanding surgical options and flexibility. The Zimmer Unicompartmental High Flex Knee System is based on the established implant design of the M/G® Unicompartmental Knee System, which has more than 15 years of clinical success1,2,3. The system offers a choice of minimally invasive surgical approaches while providing conservative solutions for patients with isolated osteoarthritis. This is the system that redefines UKA for the minimally invasive era.
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M/G Unicompartmental Knee System
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Zimmer Unicompartmental Knee System
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Implant Design Strategies
- Designed to facilitate minimally invasive procedures.
- Femoral geometry created specifically to accommodate high flexion.
- Tibial articular surface covers 87.8%* of tibial base plate.
- Tibial base plate dimensions provide optimal tibial coverage.
- Secure tibial articular surface/base plate locking mechanism helps minimise micromotion.
- Comprehensive tibial sizing for accurate patient matching.
Instrumentation Strategies
- Surgical approaches include Intra-medullary (IM), Extramedullary (EM), and Spacer Block Option all designed to provide accurate, reproducible bone resection and implant placement.
- Precision resection guides help optimise contact area of implant articulating surfaces.
- Linked distal femoral and proximal tibial resections with EM and Spacer Block Option approaches.
- Choice of tibial-first or femoral-first bone preparation with IM and EM approaches.
- All instruments, including provisional sets, contained in three trays for easy access and instrumentation management.
Multi-Approach Instrumentation – Delivering True Surgeon Choice
The Zimmer Unicompartmental High Flex Knee System adapts to a range of
surgical approaches to satisfy specific surgeon preferences. This is
accomplished with a single system of instruments that can be used with an
Intramedullary, Extramedullary, or Spacer Block approach. A common tibial
assembly is used in all three approaches. In addition, the instruments are
designed to accommodate a smaller exposure and the procedure can be
performed without everting the patella. This is the system that redefines
flexibility while minimizing complexity.
Spacer Block Approach
The Spacer Block Option provides an alternate extramedullary method for resecting the distal femoral condyle. After resecting the tibia, the Spacer Block is inserted into the joint space. The Distal Femoral Resector is then attached to the Spacer Block, providing a linked resection, to help ensure that the proximal tibial and distal femoral resections are parallel.
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IM Approach
In the IM approach, the Resection Guide is inserted into the femoral canal so the distal femoral resection is based off the anatomic axis. The Cutting Block is then attached to the Resection Guide and positioned to reproduce the desired angle. This results in a distal femoral resection that is perpendicular to the mechanical axis of the femur, and parallel to the tibial resection.
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EM Approach
In the EM approach, limb alignment is determined and set before committing
to any bone resection. Initial preparation of the distal femur and proximal
tibia is achieved by linked resection guides. This creates parallel cuts and
a preset space that is calculated to match the thickness of the implants and
reproduce the selected alignment.
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Comprehensive Sizing – Patient-Specific Results
The Zimmer Unicompartmental High Flex Knee System places a premium on
surgeon choice and patient specificity by offering a comprehensive selection
of femoral and tibial components. The system includes seven femoral
component sizes, six tibial component sizes in both modular and
all-polyethylene options, and six net-shape molded polyethylene tibial
articular surface thicknesses. This is the system that offers comprehensive
sizing and complete interchangeability for patient matching.
Footnotes:
1. Berger RA, Nedeff DD, Barden RM, et al. Unicompartmental knee arthroplasty: Clinical experience at 6- to 10-year follow-up. Clin Orthop. 1999;367:50-60.
2. Argenson JN, Chevrol-Benkeddache Y, Aubaniac JM. Modern cemented metal backed unicompartmental knee arthroplasty: A 3- to 10-year follow-up study. Presented at: 68th Annual Meeting of the AmericanAcademy of Orthopaedic Surgeons; Feb. 28-March 4, 2001 – San Francisco, CA.
3. Swienckowski J. Unicompartmental knee arthoplasty: Ten-year follow-up. 2001 Poster, Osteopathic Specialists Meeting.
