UNIT 3 - Deciduous & permanent dentitions

What is the other name of primary dentition ?

Deciduous dentition

When does primary dentition form ?

Week 14 to 3 years of age

When does primary dentition erupt ?

Month 6 to month 28

When is the transition/mixed dentition period ?

6 to 12 years of age

When is permanent dentition completed ?

14-15 years old

When does 3rd molar appear ?

18-25 years of age

Give the order of eruption of teeth for primary dentition

1) Central incisor (mandibular)

2) Lateral incisor

3) 1st molar

4) canine

2) 2nd molar

Which cadran is developing faster ?

Mandibular pairs precede the maxillary teeth

What is the dental formula of primary dentition ?

I 2/2 C 1/1 M 2/2 = 10

Which is the first permanent tooth to erupt ?

First permanent molar

When is the primary dentition complete ?

At about 2.5 years of age

What are the primary molars replaced by ?

Permanent premolars

How many teeth form the permanent dentition ?

32 teeth

What are the succedaneous teeth ?

• Developing incisors & canines

• Developing premolars

What is the definition of succedaneous teeth ?

teeth that take the place of their primary predecessors

How are primary teeth are exfoliated ?

Resorption of the deciduous roots

Apical

Middle

Cervical

Cervical

Middle

Incisal

Distal

Middle

Mesial

Buccal

Middle

Lingual

Lingual

Middle

Labial

Occlusal

Middle

Cervical

Distal

Middle

Mesial

What are the ANTERIOR teeth ?

• Central incisor

• Lateral incisor

• Canine

What are the POSTERIOR teeth ?

• 1st premolar

• 2nd premolar

• 1st molar

• 2nd molar

• 3rd molar

What is the incisal edge ?

What is a cusp ?

Elevation on the crown of a tooth making up a divisional part of the occlusal surface

What is mamelon ?

KAMEEL BEAUTIFUL/MAGNIFICENT TEETH

Any of the three rounded protuberances found on the incisal edges of newly erupted incisors

What is cingulum ?

Lingual/palatal lobe of an ANTERIOR tooth

What is a ridge ?

any linear elevation on the surface of a tooth

What is a marginal ridge ?

rounded borders of the enamel that form the mesial and distal margins of the occlusal surfaces of POSTERIOR and the mesial and distal margins of the lingual/palatal surfaces of ANTERIOR teeth

What is a triangular ridge ?

Descend from the tips of the cusps of molars and premolars toward the central part of the occlusal surfaces

What is a transverse ridge ?

When a buccal and a lingual triangular ridge join, they form a transverse ridge.

The union of two triangular ridges crossing transversely the surface of a posterior tooth

What is an oblique ridge ?

A ridge crossing obliquely the occlusal surfaces of maxillary molars and formed by the union of the triangular ridge of the distobuccal cusp and the distal cusp ridge of the mesiopalatal cusp.

What is a fossa ?

Irregular depression or concavity

What is a lingual fossa ?

Irregular depression or concavity on the lingual/palatal surface of incisors

What is a central fossa ?

Fossa on the occlusal surface

What is a triangular fossa ?

Found on molars and premolars on the occlusal surfaces mesial or distal to marginal ridges.

What is a pit ?

Small pinpoint depressions located at the junction of developmental grooves or terminals of those grooves

How many roots do ANTERIOR teeth have ?

1 root

How many roots do MAXILLARY molars have ?

3 roots

How many roots do MANDIBULAR molars have ?

2 roots

How many roots do MADIBULAR premolars have ?

1 root

How many roots do MAXILLARY premolars have ?

1st has 2 roots and the 2nd has 1 root

What is this tooth ?

MAXILLARY central incisor

What is this tooth ?

MAXILLARY lateral incisor

What is this tooth ?

MANDIBULAR central incisor

What is this tooth ?

MANDIBULAR lateral incisor

What is this tooth ?

MAXILLARY canine

What is this tooth ?

MANDIBULAR canine

What is this tooth ?

FIRST MAXILLARY pre-molar

What is this tooth ?

SECOND MAXILLARY pre-molar

What is this tooth ?

FIRST MANDIBULAR pre-molar

What is this tooth ?

SECOND MANDIBULAR pre-molar

What is this tooth ?

FIRST MAXILLARY molar

What is this tooth ?

SECOND MAXILLARY molar

What is the Carabelli cusp ?

It’s an additional cusp found on the mesiopalatal surface/aspect of the maxillary first molars (Permanent teeth)

How many cusps do maxillary second molars have ?

The maxillary second molars typically have four cusps :

• Mesiobuccal cusp

• Distobuccal cusp

• Mesiopalatal cusp

• Distopalatal cusp

How many cusps do maxillary first molars have ?

The maxillary first molars typically have four/five cusps :

• Mesiobuccal cusp

• Distobuccal cusp

• Mesiopalatal cusp

• Distopalatal cusp

• Cusp of Carabelli (mesiopalatal surface/aspect) : optional

What is this tooth ?

FIRST MANDIBULAR molar

What is this tooth ?

SECOND MANDIBULAR molar

How many cusps do mandibular first molars have ?

The mandibular first molars typically have five cusps :

• Mesiobuccal cusp

• Distobuccal cusp

• Mesiolingual cusp

• Distolingual cusp

• Distal cusp

How many csps do mandibular second molars have ?

The mandibular second molars typically have five cusps :

• Mesiobuccal cusp

• Distobuccal cusp

• Mesiolingual cusp

• Distolingual cusp

What does succedaneous teeth mean ?

Succedaneous teeth are the permanent teeth that replace the primary (deciduous) teeth in the dental arch