Systematic Review and Meta-Analysis in Facial Plastic Surgery.

Systematic reviews and meta-analyses hold a unique position in the pyramid of evidence. They can provide transparent and rigorous summaries to answer many clinical questions in facial plastic surgery. They can also identify areas of research deficiency, create new knowledge, and support guidelines or policies. A well-conducted systematic review follows a structured process to minimize bias and ensure reproducibility. When appropriate, a meta-analysis is incorporated to provide a statistical synthesis that combines the results of individual studies. This powerful quantitative method is becoming more prevalent in facial plastic surgery. This article provides a practical framework to understand and conduct this valuable type of research.