Tooth Development Introductory Lecture PDF

An overview of Tooth Development Presented by Babak Sarrafpour School of Medical Sciences The University of Sydney Page 1 Learning Outcomes On completion of this presentation, you will be able to: - Demonstrate a basic understanding of the stages comprisi...

An overview of Tooth Development Presented by Babak Sarrafpour School of Medical Sciences The University of Sydney Page 1 Learning Outcomes On completion of this presentation, you will be able to: - Demonstrate a basic understanding of the stages comprising tooth development and foundational knowledge regarding the structure of a tooth. The University of Sydney Page 2  Stages of Tooth Development – Initiation Stage – Bud Stage – Cap Stage – Bell Stage – Early bell stage – Late bell stage – Root formation Stage The University of Sydney Page 3  Ectomesenchyme Vestibular Lamina Dental Lamina Oral Cavity Oral Cavity Initiation Stage Primary Epithelial Band Dental Lamina Oral Cavity Vestibule Oral Cavity The University of Sydney Page 4  Ectomesenchyme Bud Stage Dental Lamina Dental Lamina Ectomesenchyme Oral Cavity Bud Dental Lamina Palate Oral Cavity Tuberosities The University of Sydney Page 5  Bud Dental Lamina Condensed Ectomesenchyme Cap Oral Cavity Dental Lamina Condensed Ectomesenchyme Papilla Oral Cavity Early Bell Dental Lamina Oral Cavity The University of Sydney Page 6  Papilla Condensed Mesenchyme Papilla Early Bell Inner Enamel Epithelium Dental Lamina Stratum Intermedium Oral Cavity Stellate Reticulum Outer Enamel Epithelium Rests of Serres The University of Sydney Page 7  Early Bell Inner Enamel Epithelium Papilla Stratum Intermedium Stellate Reticulum Outer Enamel The University of Sydney Epithelium Page 8  Late Bell stage Cervical loop Papilla Odontoblasts Inner Enamel Epithelium (Pre-Ameloblasts) Dentine Enamel Stratum Intermedium Inner Enamel Stellate Reticulum Epithelium (Ameloblasts) Outer Enamel The University of Sydney Epithelium Page 9  Root Sheath to Pulp Mesenchyme Root Formation stage Differentiation of Odontoblasts Dentine to Root Sheath Hertwig’s Epithelial Break-Down of Sheath Root Sheath Dentine to Follicle Differen.of Cementoblasts Cell Rests Cementum to Follicle of Malassez Differen.of Perio. Lig. Cementum Periodontal Ligament Enamel Epithelium Becomes Reduced Pulp Inner Enamel Epithelium Dentine Stellate Reticulum Enamel Outer Enamel The University of Sydney Epithelium Page 10  Deciduous Formation of Late Bell Permanent Teeth Late Bell Palate Permanent Successional Tooth Buds Permanent Molar Tooth Buds Tuberosities Back-Growth of Dental Lamina The University of Sydney Page 11 Oral Cavity Developing tooth (Surface epithelium) Bone tissue Tooth germ Ortho-Keratinization Para- Stratum Corneum (+ Nuc) Stratum Granulosum (X) Stratum Spinosum Stratum Basalis Lamina Propria  Osteoclast Osteoid Osteocytes Osteoblasts Developing tooth (Late bell stage) Outer Enamel Inner Enamel Epithelium Epithelium Stellate Reticulum Developing tooth (Late bell stage) Outer Enamel Epithelium Ameloblasts Stratum Intermedium Enamel Dentin Developing tooth (Late bell stage) Rests of Serres  Dental pulp Odontoblasts Blood vessels Fibroblasts Pre-dentine Fibres (Collagen) Dentine Dentine-Enamel Junction (DEJ)  Ground section Primary Dentine Secondary Dentine Enamel Mantle Dentine Striae of Retzius Neonatal line  References – Ten Cate's Oral Histology; Development, Structure, and Function Eighth Edition 2012 – Sarrafpour, Babak, et al. "Tooth eruption results from bone remodelling driven by bite forces sensed by soft tissue dental follicles: a finite element analysis." PLoS One 8.3 (2013): e58803. Acknowledgment: Prof Hans Zoellner The University of Sydney Page 24  COMMONWEALTH OF AUSTRALIA Copyright Regulation WARNING This material has been reproduced and communicated to you by or on behalf of the University of Sydney in accordance with section 113P of the Copyright Act 1968 (Act). The material in this communication may be subject to copyright under the Act. Any further reproduction or communication of this material by you may be the subject of copyright protection under the Act. Do not remove this notice The University of Sydney Page 25