Study: Catalyst CSR Total Shoulder System Outperforms Traditional Stemmed Implants

A new study shows positive clinical outcomes using Catalyst OrthoScience Inc.’s Catalyst CSR total shoulder system compared to standard stemmed TSAs.
 
Published in the Journal of Shoulder and Elbow Surgery, the study—”Stemless Total Shoulder Arthroplasty Using a Novel Multiplanar Osteotomy and Elliptical Humeral Head Results in Both Improved Early Range of Motion and Radiographic Center of Rotation Compared to Standard Total Shoulder Arthroplasty (Budge, Orvets)”—tested and compared early postoperative range of motion (ROM) and restoration of radiographic center of rotation (COR), using the Catalyst anatomic shoulder system and standard stemmed TSAs.
 
The results indicate that patients who received the Catalyst anatomic shoulder replacement achieved better ROM at six and 12 weeks, and improved restoration of the radiographic COR when compared to patients who received a standard stemmed TSA with a spherical humeral head.
 
“The Catalyst CSR anatomic shoulder system uses a multiplanar osteotomy that allows for superior precision and accuracy in shoulder replacement, while preserving more of the patient’s native bone,” said Matthew Budge, M.D., orthopedic surgeon, Kaiser Permanente. “This novel approach leverages both reproduction of the patient’s native humeral head height and offset with an ellipsoid anatomic head. Together, these attributes contributed to a faster recovery time compared to standard stemmed TSA.”
 
This study was a retrospective review of 50 consecutive primary patients by a single surgeon. Data was collected at six weeks, 12 weeks, six months, and 12 months postoperative on patients who received 25 stemmed implants from Depuy Synthes, Stryker Corp. (Wright Medical), Lima, and Zimmer Biomet, and 25 Catalyst anatomic implants.
 
Ninety-five percent of patients in the Catalyst group had a change in COR <3mm, compared to 60% in the stemmed group, indicating the multiplanar osteotomy and ellipsoid anatomic head result in more consistent reproduction of the humeral head anatomy, supporting better ROM.
 
“Faster recoveries can be attributed to a combination of several factors working in unison,” Catalyst President/CEO Carl O’Connell said. “A more anatomically shaped, ellipsoid humeral head design better mimics the patient’s natural anatomy. Our precision multiplanar osteotomy instrumentation removes a minimal amount of bone and consistently allows for better restoration of the native humeral joint line. And patented, oblique glenoid instruments allow for the glenoid to be prepared with less muscle retraction than a traditional perpendicular approach.”
 
Catalyst OrthoScience was founded in 2014 by orthopedic surgeon Steven Goldberg, M.D., who saw a need for less invasive procedures that would give patients a more natural-feeling shoulder after surgery. The Catalyst anatomic, reverse and convertible total shoulder systems are purpose-built, offering precision and accuracy in shoulder restoration while preserving the patient’s bone and soft tissue. A single-tray arthroplasty system offers surgeon-targeted implant positioning, lowers the per-patient cost and provides better OR instrument management. Headquartered in Naples, Fla., Catalyst products are available across the United States.