Tooth Anatomy

What is the visible part of a tooth when you smile?

The crown

What is the hardest structure in the human body?

Enamel

What percentage of enamel is inorganic?

95%

What mineral makes up a tooth?

calcium phosphate fluoride and magnesium

What is the bulk of a tooth?

Dentin

What percentage of dentin is inorganic?

70%

Which part of the tooth contains nerves and blood supply?

Pulp

What covers the root and is not part of the crown?

Cementum

What percentage of cementum is inorganic?

50-55%

Where enamel and dentin meet is called what?

Dentinoenamel (DEJ)

Where enamel and cementum meet is called what?

Cementoenamel Junction (CEJ)

Where cementum and dentin meet is called what?

Cementodentinal Junction (CDJ)

What is the supportive structure around a tooth root called?

Periodontium

What is the upper jaw bone called?

Maxilla

What is the lower jaw bone called?

Mandible

What does mixed dentition mean?

Both primary and permanent teeth are present

Around what age does mixed dentition start?

6 years old

Another name for premolars?

Bicuspids

Which premolars have two roots?

#5 and #12

Premolars are located between which teeth?

Canines and molars

What is the cusp of Carabelli?

An extra cusp on the maxiallary molar 3 and 14 on the mesiolingual side

Surface toward the midline?

Mesial

Surface away from the midline?

Distal

Surface where teeth touch each other?

Proximal

Biting edge of anterior teeth?

Incisal

Chewing surface of posterior teeth?

Occlusal

Tooth surface facing the cheek?

Buccal

Tooth surface facing the lips (anterior)?

Labial

General term for cheek/lip side?

Facial

Roof surface of the mouth?

Palatal

Surface closest to the tongue

Lingual

Which teeth are non-succedaneous?

1, 2, 3, 14, 15, 16, 17, 18, 19, 30, 31, 32

Which teeth are premolars?

#4 #5 #12 #13 #20 #21 #28 #29

What does apex mean?

The end or tip of a tooth root

What is the plural of apex?

Apices, referring to more than one tooth root tip