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Tooth Structure and Morphology

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T Patterson

on 8 September 2014

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Transcript of Tooth Structure and Morphology

(Primary Dentition)
Accessed 29 June 2014
Accessed 29 June 2014
Accessed 29 June 2014







Compact bone is a layer of hard bone which surrounds the outside of the alveolar bone

The periodontal ligament attaches to this bone keeping it in the socket

Compact Bone

The alveolar bone is a ridge of bone which supports the teeth

Maxilla – upper jaw

Mandible – lower jaw

Bone is made up from cells called osteoblasts

The alveolar bone had a spongy appearance but is hard

Alveolar bone

The periodontal membrane or ligaments anchor the root of the tooth into the socket
(via the cementum)

It is a fibrous tissue which allows movement of the tooth in the socket

Periodontal ligament

Cementum forms the outer layer of the roots of the tooth

It is formed of cementoblasts which is a mineral softer than enamel or dentine

Cementum attaches the tooth to the periodontal ligament


Dentine is the layer below the enamel

It is the largest part of the tooth

Dentine is formed from odontoblast cells it is living tissue making it sensitive to pain

Softer than enamel but still harder than bone

Formed of hollow tubes which transmit to the pulp




The gingiva / mucosa known as the ‘gum’

This forms the protective layer over the bone and is tightly bound around the tooth

The gingiva and the tooth meet to form the amelo – cemental junction


The pulp chambers are found inside the centre of the tooth

The pulp contains:

Blood Vessels

Nerve Tissue

They feed the tooth and enter the tooth from the apex of the tooth

Pulp Chamber

Dentine under a microscope shows hollow tubes

Enamel under a microscope shows tight packed minerals

Enamel & Dentine

The Enamel is the outer layer of the tooth

The tooth has cusps and fissures which are visible in the mouth

Enamel is produced by cells called ameloblasts and is the most highly mineralised tissue of the body – harder than bone

The mineral is hydroxyapatite

Enamel cannot repair itself and is insensitive to pain

Tooth Crown
Visible part of the
tooth in the mouth

Tooth Root/Root canal
Hidden in the gingiva
and bone

Apex of the tooth
Meaning the end or tip

The outer surface of the compact bone is called the lamina dura

Tooth Structure
Presented by the Mentoring Group
Think about how the Gingivae looks in health?
What are the differences between Deciduous and Permanent teeth?
See page
of the Levison's Textbook for Dental Nurses 11th Edition
for further information
See page
of the Levison's Textbook for Dental Nurses 11th Edition
for further information
Activity 1, page 3 of your workbook
Activity 2,
page 4 of your workbook
Activity 3, page 4 of your workbook
Activity 4, page 5 of your workbook
Activity 5, page 5 of your workbook
Activity 6, page 6 of your workbook
Activity 7, page 7 of your workbook
Now please complete activity 8, page 8 of your workbook
Activity 9, page 9 of your workbook
Activity 10, pages 13 - 14 of your workbook
Activity 12, page 15 of your workbook
Please view your video on
'Eruption Dates for Permanent Dentition'
Activity 11, page 14 of your workbook
(Permanent Dentition)
Full transcript