Dental Anatomy Video Series - Introduction

Overview

• Presenter: Dr. Ryan
• Series Focus: Structure and function of teeth
• Target Audience: Dental students or professionals

Dentition

• Complete Adult Set: 32 permanent teeth
  • Variations: Some may have more or less
• Permanent Dentition: Distributed between two arches
  • Upper Arch: Maxillary
  • Lower Arch: Mandibular

Tooth Classification

• Anterior Teeth: Front six teeth in both arches
• Posterior Teeth: Teeth behind the anterior teeth
• Incisors: Front four teeth
  • Function: Incising/Cutting food
  • Importance: Upper incisors key for smile aesthetics and phonetics (f and v sounds)
• Canines (Eye Teeth): Near corners of mouth
  • Function: Tearing food
• Molars: For chewing, milling, and grinding food
• Premolars: Assist with chewing

Tooth Naming Conventions

• Naming begins with: Arch (Maxillary or Mandibular)
• Followed by: Side (Right or Left)
• Finally: Type of Tooth
  • Example: Tooth #8 is the Maxillary Right Central Incisor

Views and Aspects

• Facial View (Labial/Buccal Aspect)
• Lingual Aspect (Palatal for maxillary teeth)
• Mesial and Distal Aspects
• Biting Surface: Incisal (anterior) or Occlusal (posterior)
• Internal View: Cross-section of crown or root

Key Terms

• Cusp: Pointed/rounded elevation on a crown
• Tubercle: Small extra enamel elevation
• Lobe: Center of calcification, forming tooth divisions
• Mamelons: Small bumps on incisal edges; wear away over time
• Imbrication Lines: Ridges on the cervical third of labial surface
• Perichymata: Grooves between imbrication lines
• Height of Contour: Widest part of a tooth
• Proximal Contact: Area of contact between adjacent teeth
• Embrasure: Space around teeth

Additional Terms

• Groove: Linear depression; can be developmental or supplemental
• Fossa: Shallow depression at groove coalescence
• Fissure: Deeper than normal groove
• Pit: Depression where grooves meet; decay prone
• Ridge: Linear elevation of enamel
• Cingulum: Convex protuberance on lingual surface
• Apex: End of tooth root
• Apical Foramen: Opening at the root end
• Furcation: Root branching point (bi/trifurcation)
• Cemento Enamel Junction (CEJ): Where cementum and enamel meet
• Root Trunk: Area between CEJ and frication

General Trends in Dentition

• Common Missing Teeth: Third molars, mandibular second premolars, maxillary laterals
• Tallest Crowns: Mandibular canines, maxillary centrals, maxillary canines
• Width: All teeth wider facial-lingually except maxillary incisors and mandibular molars
• Height of Contour: Generally in cervical third except mandibular molars
• Crown Trends: Decrease in height distally
• Root Trunks: Increase in length posteriorly
• Lingual Embrasures: Larger than facial to direct food towards tongue

Conclusion

• Next Steps: Detailed examination of each tooth
• Additional Resources: Patreon for slides and practice questions
• Call to Action: Like, subscribe, and support on Patreon