The gender solutions Natural-Knee flex system and future directions

Area of Science:

• Orthopedic surgery
• Biomedical engineering
• Knee arthroplasty

Background:

• Distal femur morphology exhibits variability, potentially impacting knee implant fit.
• Traditional knee implants may require intraoperative compromises to achieve optimal fit, particularly in female patients.
• The Zimmer Gender Solutions Natural-Knee Flex System was developed to address morphological variations.

Purpose of the Study:

• To evaluate the 1-year outcomes of the Zimmer Gender Solutions Natural-Knee Flex System.
• To assess the impact of varied aspect ratios on distal femur fit and surgical outcomes.
• To compare the performance of the new system with previous iterations.

Main Methods:

• A prospective study of the first 360 patients receiving the Zimmer Gender Solutions Natural-Knee Flex System.
• Analysis of 1-year patient outcomes, including range of motion (flexion) and need for lateral release.
• Utilizing implants with both narrow and wider medial-lateral/anterior-posterior aspect ratios.

Main Results:

• Mean patient flexion achieved was 131 degrees, an improvement over previous systems.
• The rate of lateral release decreased significantly to 2%.
• The system facilitated a better fit without the need for intraoperative downsizing, especially for typically narrower female femurs.

Conclusions:

• The Zimmer Gender Solutions Natural-Knee Flex System provides improved fit and surgical efficiency.
• The availability of varied aspect ratios enhances patient outcomes, including increased knee flexion.
• This implant design addresses morphological variability, potentially reducing the need for intraoperative compromises in knee replacement surgery.