Arch width changes following first premolar extractions: a comparison between invisalign and fixed appliances Hengyu Hu Zhaowei Cen Shuai Huang Lang Lei Jul 2026 · Clinical Oral Investigations · Vol 30 · 0 citations · 32 references Medicine DOI PubMed Semantic Scholar Save View source Cite Copy APA Copied ✓ Copy MLA Copied ✓ Copy BibTeX Copied ✓ Share