Robotic arm-assisted patellofemoral joint arthroplasty achieves good short-term survival and functional outcomes: A systematic review and meta-analysis.
Thomas R Williamson, Steve Robins, Jonathan T Super et al.
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In 30 seconds
This Level IV systematic review and meta-analysis assessed robotic arm-assisted patellofemoral arthroplasty (RA-PFA) outcomes. Eight studies included 893 patients, with mean follow-up of 3.3 years (SD 1.1). Pooled implant survivorship was 93.6% (95% confidence interval [CI]: 91.2-95.8). In comparisons with manual PFA, RA-PFA was associated with a lower revision risk (RR = 0.75, 95% CI = 0.562-0.995, p = 0.048), although the estimate was uncertain. Functional outcomes were reported as excellent in three studies, but evidence was limited and no randomised studies were identified.
Key findings
- Across eight studies and 893 patients, RA-PFA survivorship was 93.6% (95% confidence interval [CI]: 91.2-95.8) at mean follow-up of 3.3 years (SD 1.1).
- Compared with manual PFA, RA-PFA was associated with reduced revision risk (RR = 0.75, 95% CI = 0.562-0.995, p = 0.048); the authors noted uncertainty around the estimate.
- Three studies (n = 112) reported patient-reported outcomes, with all describing excellent postoperative functional outcomes.
Why it matters
These findings provide an early overview of survivorship and function after robotic arm-assisted PFA, while suggesting a possible revision advantage over manual techniques. The evidence may inform discussions of this surgical approach, but the limited outcome reporting and uncertainty in comparative estimates mean that apparent benefits should be interpreted cautiously.
What to keep in mind
The review found few studies, short follow-up and no randomised trials. Patient-reported outcomes were available from only three studies, and radiological outcomes from two.