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Clinical Outcomes of Pyrocarbon Hemiarthroplasty: A Short-Term, Multicenter Study.
Armodios M Hatzidakis1, Grant E Garrigues2, Libby A Mauter1
1Western Orthopaedics, Denver, Colorado.
The Journal of Bone and Joint Surgery. American Volume
|December 29, 2025
Summary
Pyrocarbon hemiarthroplasty (HA) shows promising short-term results for shoulder replacement, offering improved outcomes and higher success rates compared to traditional cobalt-chromium HA. This advanced material may reduce pain and erosion, enhancing patient satisfaction.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
- Clinical Outcomes Research
Background:
- Shoulder hemiarthroplasty (HA) often provides suboptimal pain relief, limiting its use.
- Pyrocarbon-graphite composites may offer reduced wear and glenoid pain compared to metal implants.
- This study evaluates the clinical outcomes of pyrocarbon HA.
Purpose of the Study:
- To assess the short-term clinical outcomes and implant survivorship of pyrocarbon HA.
- To compare the efficacy of pyrocarbon HA against a historical cobalt-chromium HA cohort.
- To determine the Composite Clinical Success (CCS) rate for pyrocarbon HA.
Main Methods:
- Prospective, single-arm, multicenter study with 157 patients.
- Evaluated Constant score, ASES score, SANE score, satisfaction, EQ-5D, and range of motion.
- Compared pyrocarbon HA to a propensity score-matched cobalt-chromium HA cohort using CCS rate.
Main Results:
- 144 patients completed short-term follow-up (mean 24.4 months).
- Significant improvements observed in range of motion and patient-reported outcomes.
- Pyrocarbon HA achieved an 82.7% CCS rate versus 66.8% for cobalt-chromium HA (p < 0.001).
Conclusions:
- Pyrocarbon HA demonstrates favorable short-term clinical outcomes.
- Pyrocarbon HA shows superior success rates compared to historical cobalt-chromium HA.
- The material properties of pyrocarbon may contribute to improved patient results in shoulder replacement.
