Ch. 18 - Primary Dentition

What is the first set of teeth called?

Primary dentition

What does 'deciduous' refer to in dental terms?

Teeth that shed and are replaced by permanent dentition

How many primary teeth are in total?

20 primary teeth

What types of teeth are included in primary dentition?

Incisors, canines, molars

Which numbering system is used for primary teeth?

Universal numbering system A-T

When does mineralization of primary teeth begin?

13-16 weeks

By when have all primary teeth started to mineralize?

18-20 weeks

Are there primary teeth observable in the oral cavity at birth?

No

What is the first primary tooth to erupt?

Primary mandibular central incisor (6-10 months)

What is the last primary tooth to complete its root development?

Primary maxillary second molar

How long does it take to complete primary dentition?

2-3 years

Is a 6-month delay or acceleration in tooth eruption considered normal?

Yes

What is more important than the actual eruption dates?

Eruption sequence

How do tooth types erupt?

In pairs

Who tends to shed primary dentition and have permanent dentition earlier?

Young females

What type of spaces are necessary for correct alignment of permanent teeth?

Interproximal spaces

What are the largest interproximal spaces in primary dentition called?

Primate spaces

What do primary molars get replaced by?

Permanent premolars

How does the crown of a primary tooth relate to its root?

Short in relation to total length

What is a distinctive feature of the occlusal table on primary teeth?

Narrower than permanent teeth

What is the crown-to-root ratio in primary teeth compared to permanent teeth?

Smaller in ratio

What is unique about the roots of primary teeth?

May show partial resorption as teeth begin to shed

How does the pulp cavity of primary teeth compare to permanent teeth?

Relatively large in proportion

What is a key feature of the dentin in primary teeth?

Thinner than that of permanent teeth

Why is the enamel of primary teeth a whiter tone?

Due to increased opacity of enamel

What are two clinical functions of primary dentition?

Esthetics and mastication

Caries caused by prolonged nighttime use of a baby bottle or sugar-coated pacifier

Early childhood caries

When should a child's first dental appointment occur?

Within 6 months of the eruption of the first primary tooth and no later than 12 months of age

Why must extractions of primary teeth be done with caution?

Due to nearby developing tooth germs of permanent dentition

What specific primary incisor types exist?

Primary maxillary central incisor and primary mandibular central incisor

What distinguishes primary canines from permanent successors?

Distinct bulging labial and lingual cervical ridge

How many primary molars are there, and what types are included?

8 primary molars, first and second molars

What is a common feature of primary molars in comparison to permanent molars?

Distinct bulging cervical ridge on the buccal and lingual surfaces

What is a unique characteristic of the occlusal table of primary maxillary first molars?

H-shaped groove pattern and three fossae

What do you call the issue when a child does not recognize the eruption of permanent molars?

Appearance of newly erupted permanent first molars resembling primary second molars