The
Teeth
This is probably the most important entity inside
the mouth. The tooth plays a major role in the most vital process needed
in every living specie in order to survive, eating. I human specie in particular,
the whole process of digestion
actually starts inside the mouth. Food is chewed and mixed with saliva
before it has to be brought down to the stomach for further processing. |
best to learn the nomenclature, or the system
of names of each tooth. The first molars are the first set of teeth in
the permanent dentition to emerge in the oral cavity. They appear at the
age of 6 years, hence these teeth are oftentimes called "the 6 year
molar." The last to emerge are the 3rd molars. These teeth don't
come out until the age of 17 years or even later. Third molars are always
subjected to variations and anomalies. |
The
Permanent Set of Dentition
|
Aside from function, the tooth also plays a vital
role in aesthetics. A beautiful set of teeth emanates a beautiful smile.
Studying the tooth alone is a broad subject to tackle.
In order to understand fully this subject, it is |
A lot of factors contributed
to these anomalies and variations.
There are a total of 32 permanent teeth, including third molars when
present. A total of 16 teeth comprise each arch, (upper and
lower). |
Below
is a table showing the sequence of eruption of the permanent set:
Tooth
(Maxillary)
|
Root
Length
(mm.)
|
Crown
Length (mm.)
|
Eruption
(in
years)
|
Central
Incisors
|
13
|
10.5
|
7-8
|
Lateral
Incisors
|
13
|
9.0
|
8-9
|
Canines
|
17
|
10.0
|
11-12
|
First
Premolars
|
14
|
8.5
|
10-11
|
Second
Premolars
|
14
|
8.5
|
10-12
|
First
Molars
|
*b=12
*l=13
|
7.5
|
6-7
|
Second
Molars
|
*b=11
*l=12
|
7.0
|
12-13
|
Third
Molars
|
11
|
6.5
|
17-21
|
Tooth
(Mandibular)
|
Root
Length
(mm.)
|
Crown
Length (mm.)
|
Eruption
(in
years)
|
Central
Incisors
|
12.5
|
9.0
|
6-7
|
Lateral
Incisors
|
14
|
9.5
|
7-8
|
Canines
|
16
|
11.0
|
9-10
|
First
Premolars
|
14
|
8.5
|
10-12
|
Second
Premolars
|
14.5
|
8.0
|
11-12
|
First
Molars
|
14
|
7.5
|
6-7
|
Second
Molars
|
13
|
7.0
|
11-13
|
Third
Molars
|
11
|
7.0
|
17-21
|
Note: *b stands for buccal or toward the
cheek; *l stands for lingual or towards the tongue or palate
|