ROSA® Knee System

Individualized alignment and ligament balancing technique with the ROSA® robotic system for total knee arthroplasty.

Rossi SMP, Benazzo F.  Int Orthop. 2023 Mar;47(3):755-762. doi: 10.1007/s00264-022-05671-z. Epub 2023 Jan 4. PMID: 36596998.

Key Takeaway: The ROSA Knee System is showing a favorable gap balancing technique and the possibility to create individualized alignment. 

The ROSA® robotic system has been recently introduced in the market and presents specific and peculiar features to optimize ligament balancing and an individualized alignment of the implant in a three dimensional prospective.

ROSA® Hip System

The learning curve for a novel, fluoroscopy-based robotic-assisted total hip arthroplasty system. 

Buchan GBJ, Hecht CJ 2nd, Lawrie CM, Sculco PK, Kamath AF. Int J Med Robot. 2023 Apr 14:e2518. doi: 10.1002/rcs.2518. Epub ahead of print. PMID: 37058696.

Key Takeaway: Adoption of fluoroscopy-based RA-THA is associated with a brief learning curve of 12 cases.

Implementation of fluoroscopy-based RA-THA was associated with a learning curve of 12 cases. A 6-min increase in operative time was seen during the learning phase compared to the proficiency phase (44.3 ± 4.4 vs. 38.0 ± 7.1 min; p < 0.001), with a 3-min longer robotic cup impaction sequence during the learning phase (7.8 ± 1.9 vs. 4.8 ± 1.3 min; p < 0.001).

SignatureTM ONE Surgical Planning 

Patient-specific targeting guides compared with traditional instrumentation for glenoid component placement in shoulder arthroplasty: a multi-surgeon study in 70 arthritic cadaver specimens

Throckmorton, MD, Thomas W, Lawrence V. Gulotta, MD, Frank O. Bonnarens, MD, Stephen A. Wright, MD, Jeffrey L. Hartzell, MD, William B. Rozzi, MD, Jason M. Hurst, MD, Simon P. Frostick, MD, John W. Sperling, MD, MBA. J Shoulder Elbow Surg (2015).

Key Takeaway: Signature ONE planner and patient-specific guides were significantly more accurate (P=.01) for the combined vectors of version and inclination compared to conventional instruments.


Recovery Curves for Patient Reported Outcomes and Physical Function After Total Hip Arthroplasty.

Sato, EH, et al. The Journal of Arthroplasty. Published online April 15, 2023. DOI:

Key Takeaway: This study provides a unique and valuable visual aid to assist with patient counseling and setting perioperative expectations.

Patients can be counseled that the greatest proportional improvement in PROMs is within one month after THA, while function surpasses pre-operative baselines by three-months, and gait quality may not improve until after one-year. This can help set realistic expectations and target interventions toward patients deviating from the norm.

OrthoIntel Orthopedic Intelligence Platform

An Orthopaedic Intelligence Application Successfully Integrates Data from a Smartphone-based Care Management Platform and a Robotic Knee System Using a Commercial Database.

Lonner, J.H., Anderson, M.B.*, Redfern, R.E.* et al. International Orthopaedics (SICOT) (2022).

Key Takeaway: mymobility can be integrated with ROSA Knee to passively collect data throughout the episode-of-care. Associations between intra-operative decisions regarding laxity and post-operative outcomes were identified.

There were higher step counts at six-weeks post-operatively in knees with >2mm increased laxity in both the lateral compartment in extension and medial compartment in flexion (p<0.05). Knees balanced in flexion within <0.5mm had higher KOOS JR scores at six-weeks post-operative (p=0.034) compared to knees balanced within 0.5 – 1.5mm. Knees with laxity balanced between 0.5 and 1.5 mm and those with more than 1.5 mm of laxity between medial and lateral compartments in extension had significantly greater step counts at six-weeks. The study has a relatively small sample size (n=131).

The focus of this paper was on the feasibility of data collection throughout the episode of care. These associations are intriguing, and the clinical relevance needs further investigation.

OptiVu™ Mixed Reality

Clinical Accuracy of the HipXpert System with the 3D Display and Anchoring Application; A Cadaveric Study

Doug Hudson, Patrick Lane, and Stephen Murphy, MD

Key Takeaway: The current study demonstrates that the HipXpert system with the HipXpert 3D Display and Anchoring Application can be used to successfully achieve accurate implant orientation in the acetabulum.

The study tested the clinical accuracy of the HipXpert system with the HipXpert 3D Display and Anchoring Application in a cadaveric study. It demonstrates that the HipXpert system with the HipXpert 3D Display and Anchoring Application resulted in implant orientation accuracy of less than 5 degrees error for both anteversion and inclination for all 47 screw implantations using both the anterior and lateral tools.

*Authored, in part, by a Zimmer Biomet clinical employee
Funded, in part, by Zimmer Biomet

This material is intended for healthcare professionals. Distribution to any other recipient is prohibited. Zimmer Biomet does not practice medicine. For indications, contraindications, warnings, precautions, potential adverse effects and patient counselling information, see the package insert or contact your local representative; visit for additional product information. Not all patients are candidates for the use of this product and surgeons should evaluate individually to determine which patients are appropriate for therapy at home.

All names used in the mymobility app examples are fictitious. No identification with actual patients or health care professionals is intended or should be inferred. Apple, Apple Watch, iPhone, HealthKit and Mac are trademarks of Apple, Inc., registered in the U.S. and other countries. Patients must have compatible hardware and be clinically appropriate for remote care to use mymobility. WalkAI Exceptions are visible through the mymobility® clinician experience and are only for patients using the mymobility app with an iOS device. ©2022 Zimmer Biomet