Does Pulling Teeth Change the Face? A Meta-Analysis

For decades, orthodontists have argued about whether removing premolars to make room for crowded teeth alters the shape of the face — and whether it flattens the profile in a way patients later regret. This systematic review and meta-analysis set out to settle the question with pooled data, searching nine databases for controlled studies comparing extraction and non-extraction treatment and grading each one's risk of bias using Cochrane methods.

By combining the soft-tissue measurements across studies into random-effects meta-analyses, the authors could estimate the average effect of an extraction protocol on the lips and facial profile rather than relying on any single clinic's experience or any one practitioner's conviction.

This matters because it speaks directly to the project's stance on the "Space to Look Well" pillar: that crowded teeth are a sign of insufficient growth, and that extraction is a decision with consequences for the whole face, not just the bite. Bringing rigorous, pooled evidence to a debate so often driven by opinion is exactly how a movement built on evidence earns the right to question standard practice.