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Difference between revisions of "Tooth"

Line 4: Line 4:
  
  
'''1.Macroscopic structure'''
 
  
  
 +
'''1. The two dentitions:'''
  
'''1.1 Crown'''  
+
 
 +
'''1.1 Permanent teeth:'''
 +
 
 +
28 teeth (+ 4 wisdom teeth) consisting of:
 +
8 Anterior teeth
 +
4 Canines
 +
8 Premolars (Bicuspids)
 +
8 Molars
 +
 
 +
'''1.2 Primary teeth (milk teeth)'''
 +
 
 +
20 teeth consisting of
 +
8 Anterior teeth
 +
4 Canines
 +
8 Molars
 +
 
 +
 
 +
 
 +
 
 +
'''2. Macroscopic structure'''
 +
 
 +
 
 +
 
 +
'''2.1 Crown'''  
  
 
The crown is built up of enamel and dentin. The dentin is covered by the enamel (crown-dentin)  
 
The crown is built up of enamel and dentin. The dentin is covered by the enamel (crown-dentin)  
  
'''1.2 Root'''
+
'''2.2 Root'''
  
 
The root mainly consists of dentin, covered with cementum (root-dentin)
 
The root mainly consists of dentin, covered with cementum (root-dentin)
 
The crown and the root are separated through the neck of the tooth
 
The crown and the root are separated through the neck of the tooth
  
'''1.3 Pulp chamber'''
+
'''2.3 Pulp chamber'''
  
 
The Pulp chamber is covered by dentin and contains the pulp, a soft tissue built up of vessels and nerves.
 
The Pulp chamber is covered by dentin and contains the pulp, a soft tissue built up of vessels and nerves.
 
The pulp separated into the crown-pulp and the root-pulp by the cervical region
 
The pulp separated into the crown-pulp and the root-pulp by the cervical region
 
On the root-tip there is a little opening, the so called apical foramen.
 
On the root-tip there is a little opening, the so called apical foramen.

Revision as of 09:49, 31 May 2016

The tooth is embedded in the jaw bones with its root and protrudes into the oral cavity with its crown. Its function is biting and grinding food, as a first step of digestion. Humans do have two dentitions with different, specialised teeth.



1. The two dentitions:


1.1 Permanent teeth:

28 teeth (+ 4 wisdom teeth) consisting of: 8 Anterior teeth 4 Canines 8 Premolars (Bicuspids) 8 Molars

1.2 Primary teeth (milk teeth)

20 teeth consisting of 8 Anterior teeth 4 Canines 8 Molars



2. Macroscopic structure


2.1 Crown

The crown is built up of enamel and dentin. The dentin is covered by the enamel (crown-dentin)

2.2 Root

The root mainly consists of dentin, covered with cementum (root-dentin) The crown and the root are separated through the neck of the tooth

2.3 Pulp chamber

The Pulp chamber is covered by dentin and contains the pulp, a soft tissue built up of vessels and nerves. The pulp separated into the crown-pulp and the root-pulp by the cervical region On the root-tip there is a little opening, the so called apical foramen.

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