Mixed Dentition | Dental School Basics

What happens when primary and permanent teeth coexist in the same mouth — and why do a child's front teeth sometimes look temporarily "off"? This video breaks down the mixed dentition stage in detail: the period (~6–12 years) when primary and permanent teeth are present at the same time, split into its early and late phases. In this video: Mixed dentition = coexistence of primary + permanent teeth (~6–12 years) Early Mixed Dentition (6–8 years): central/lateral incisors and first molars erupt The "Ugly Duckling Stage" — why gaps between the upper front teeth are a normal, temporary phase Late Mixed Dentition (9–12 years): the arch nears its permanent state Leeway space — the size difference between primary canines/molars and their permanent successors Part of the Dental School Basics series — a beginner-friendly walkthrough of the foundations of dentistry. 📚 Sources & further reading: American Dental Association (ADA) – Glossary of Dental Terms FDI World Dental Federation – Tooth eruption charts Please note that eruption timing and terminology can vary between individuals, sources and institutions — the ranges shown here are general guidelines, not exact predictions. --- 🦉 Sapientia Dentalis – Dental School Basics More dental school videos are coming soon. #Dentistry #DentalSchool #DentalStudent #DentalEducation #DentalSchoolBasics --- Educational Disclaimer This content is created for educational purposes and reflects a dental student learning perspective. It is intended to support learning and revision and does not replace professional dental or medical advice, diagnosis or treatment, nor official university teaching materials, textbooks or clinical guidelines. While care is taken to provide accurate and up-to-date information, errors or differences in terminology, classification and teaching standards may occur. Always verify clinically relevant or examination-specific information with appropriate professional or academic sources. Illustrations & Copyright Unless otherwise credited, the illustrations and visual materials in this video were hand-drawn and created for Sapientia Dentalis. External material, where used, will be credited whenever appropriate. If you notice an error, believe a source or attribution is missing, or have another correction regarding the educational content, please feel free to get in touch via the contact information provided on this channel.