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Development of Teeth PowerPoint Presentation

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Description : Check out this medical PowerPoint presentation titled "Development of Teeth” by Dr. Archana Rani.

This medical PowerPoint presentation is about the development of teeth which starts before birth and continues throughout childhood and adolescence. Here is a brief overview of the stages of tooth development:

Bud stage: This is the first stage of tooth development, which begins around the sixth week of fetal development. During this stage, small buds form along the gum line, which will eventually become the baby teeth.
Cap stage: During this stage, which begins around the tenth week of fetal development, the tooth buds form a cap-like shape and start to differentiate into the different components of the tooth, including the enamel, dentin, and pulp.
Bell stage: This stage, which begins around the 14th week of fetal development, is when the tooth starts to take on its recognizable shape. The enamel, dentin, and pulp continue to develop, and the tooth begins to form its characteristic ridges and cusps.
Crown formation: During this stage, which occurs after birth, the tooth continues to develop and push up through the gums. The crown of the tooth, which is the part that is visible above the gum line, forms during this stage.
Root formation: As the tooth continues to push up through the gums, the roots of the tooth begin to form. This process can take several years to complete.
Eruption: Finally, the tooth erupts through the gums and becomes visible in the mouth. Baby teeth usually start to erupt between six months and one year of age, while permanent teeth begin to erupt around age six or seven.

Tooth development is a complex process that involves multiple stages and can take several years to complete.

Tags : development of teeth, tooth development, tooth buds, enamel, dentin, crown of the tooth, Dentistry, dental medicine, oral medicine, dental medicine PowerPoint presentation

Published on : Jun 20, 2023 | Views : 2663 | Downloads : 1

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Slide 1-

Development of Teeth Dr. Archana Rani Associate Professor Department of Anatomy KGMU UP, Lucknow
Slide 2-

Introduction Teeth are formed in relation to the alveolar process. Epithelial thickening: Dental lamina Enamel organs: Series of 10 local thickenings on dental lamina in each alveolar process. Each thickening forms one milk tooth.
Slide 3-

Formation of enamel organs
Slide 4-

Stages in the formation of enamel organ Bud stage : Characterized by formation of a tooth bud. The epithelial cells begin to proliferate into the ectomesenchyme of the jaw.
Slide 5-

Cap stage : Formation of dental papilla. The enamel organ & dental papilla forms the tooth germ. Formation of ameloblasts. Formation of odontoblasts.
Slide 6-

Bell stage : The cells on the periphery of the enamel organ separate into three important layers: Cuboidal cells on the periphery of the dental organ form the outer enamel epithelium. The cells of the enamel organ adjacent to the dental papilla form the inner enamel epithelium. The cells between the inner enamel epithelium and the stellate reticulum form a layer known as the stratum intermedium. The dental lamina begin to disintegrates, leaving the developing teeth completely separated from the epithelium of the oral cavity.
Slide 7-

Crown stage : Mineralization of hard tissues occur. The inner enamel epithelial cells change in shape from cuboidal to columnar. The nuclei of these cells move closer to the stratum intermedium and away from the dental papilla. The adjacent layer of cells in the dental papilla suddenly increases in size and differentiates into odontoblasts, which form dentin. The inner enamel epithelium and the formation of odontoblasts continue from the tips of the cusps.
Slide 8-

Crown stage (contd….): 5. The odontoblasts secrete an organic matrix into their immediate surrounding and form the dentin. 6. After dentin formation begins, the cells of the inner enamel epithelium secrete an organic matrix against the dentin. This matrix immediately mineralizes and becomes the tooth's enamel. 7. Outside the dentin are ameloblasts, which are cells that continue the process of enamel formation; therefore, enamel formation moves outwards, adding new material to the outer surface of the developing tooth.
Slide 9-

Enamel: is a hard outer layer consisting primarily of calcium and phosphate in the form of hydroxyapatite. Dentin: is the inner layer, the bulk of the tooth. Pulp: is the core, containing nerves and blood vessels. Cementum: is the thin layer around the root; a bone-like material which connects the teeth to the jaw. Structural components of teeth
Slide 10-

Types of teeth according to their attachments Acrodont: On the alveolar surface of the jaw. each tooth resides on the occlusional surface of the jaws in a very shallow socket. Replacement teeth arise adjacent to the active teeth (e.g. in snakes). Thecodont : Teeth may be attached in sockets (replace within the same socket reptiles). with sockets (e.g. in mammals, crocodiles, dinosaurs). 3. Pleurodont: Attachment on the inner side of the jaws (e.g. in lizards). Teeth is continuously replaced.
Slide 11-

Stages in the formation of a tooth germ
Slide 12-

Parts of a developing tooth An erupting temporary tooth
Slide 13-

Origin of germs of permanent teeth
Slide 14-

Anomalies of Teeth Anodentia Supernumerary teeth Gemination Malocclusion Precocious eruption of teeth Delayed eruption of teeth Improper formation of enamel or dentine Abnormal location of teeth e.g. in ovary or in hypophysis cerebri
Slide 15-

REFERENCES 1. Langman’s Medical Embryology, 11th Edition. 3. I.B. Singh. Human Embryology, 10th Edition.
Slide 16-

MCQs The cells of the enamel organ that line the papilla are called: a) Ameloblasts b) Odontoblasts c) Cementoblasts d) Dental cuticle
Slide 17-

MCQs 2. Mesenchymal cells which cover dentine are called: a) Ameloblasts b) Odontoblasts c) Cementoblasts d) Dental cuticle
Slide 18-

MCQs 3. Temporary canines erupt at: a) 6-9 months b) 8-10 months c) 16-20 months d) 24-36 months
Slide 19-

MCQs 4. The epithelium overlying the alveolar process become thickened to form: a) Dental lamina b) Dental papilla c) Dental cuticle d) Periodontal ligament
Slide 20-

MCQs 5. Absence of ameloblasts is a feature of: a) Crown b) Enamel c) Dentine d) Root