Bedford, Mass.-based ConforMIS reported results from its iTotal PS total knee replacement study.
Researchers compared knee kinematics of 13 patients implanted with the iTotal PS customized total knee replacement device with 18 patients implanted with the Zimmer Biomet NexGen PS total knee replacement device. The study used real-time mobile X-ray imaging and 2-D and 3-D registration to evaluate patients six months post-surgery.
Researchers presented the data at the 2017 British Association for Surgery of the Knee Annual Meeting, held from March 28 to 29.
Here are four takeaways:
1. The study revealed iTotal PS patients experienced a greater average range of motion during a deep knee bend (112 degrees) compared to the NexGen PS patients (94 degrees).
2. The iTotal PS patients also demonstrated greater lateral femoral rollback of 11.73 mm compared to 4.69 mm for NexGen PS patients.
3. While iTotal PS patients saw medial translation of 2.8 mm, NexGen PS patients only saw 1 mm.
4. iTotal PS patients also saw greater axial rotation of 10.85 degrees versus 7.58 degrees for NexGen PS patients.