Mid-term results of Eclipse total shoulder arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomaterials Science
• Medical Device Technology

Background:

• Stemless humeral components in anatomical total shoulder arthroplasty (TSA) have increased in use since 2004.
• Early outcomes are promising, but independent mid-term data are limited.
• This study evaluates the Eclipse stemless shoulder prosthesis.

Purpose of the Study:

• To report mid-term outcomes of the Eclipse stemless TSA.
• To assess functional and radiological results at a minimum of five years.
• To compare outcomes between osteoarthritis and other indications.

Main Methods:

• A consecutive series of 143 Eclipse stemless prostheses in 131 patients were reviewed.
• Primary outcome: Oxford Shoulder Score (OSS) at minimum five years.
• Secondary outcomes: Range of motion, humeral radiolucency, rotator cuff failure, glenoid loosening.

Main Results:

• Mean OSS at 6.67 years was 40.12, showing no significant difference or deterioration over time.
• Significant improvement in range of motion maintained between two and five years.
• 28% showed humeral radiolucency (incomplete, <2mm), 15% glenoid radiolucency, 10% component failure, and 15% rotator cuff failure.

Conclusions:

• The Eclipse stemless TSA demonstrates excellent functional and radiological outcomes with no humeral component loosening at five years.
• Radiolucent lines were observed but did not impact clinical results, requiring long-term monitoring.
• Revisions were primarily due to glenoid and rotator cuff failure.