Deciduous Dentition Development Lecture 5 Quiz

Deciduous Teeth Development

• Deciduous teeth first start to develop in humans during the embryonic stage, around 6-8 weeks in utero.
• There are 10 buds on the upper arch and 10 on the lower arch that eventually become the primary (deciduous) dentition.

Eruption of Deciduous Teeth

• The eruption of deciduous teeth usually starts around 6-12 months after birth.
• There are 20 deciduous teeth in total.

Completion of Deciduous Dentition

• Deciduous dentition is usually complete and in full function by 2-3 years of age.
• The root formation of all deciduous teeth is complete by 3-4 years of age.

Replacement of Primary Teeth

• The process of shedding primary teeth and their replacement by permanent teeth is called transition.
• The replacement of primary teeth with permanent teeth typically begins around 6-7 years of age.

Primary Dentition Characteristics

• Closed primary dentition is characterized by the absence of spaces, indicating a risk of crowding when larger permanent teeth erupt.
• Primate spaces in the primary dentition serve as a guide for the proper alignment of permanent teeth.
• The purpose of primate spaces is to provide sufficient room for the eruption of permanent teeth.
• A flush terminal plane in primary dentition results in a normal molar relationship.

Transition to Permanent Teeth

• Root resorption, caused by the pressure of the erupting permanent tooth, is responsible for the replacement of primary teeth with permanent teeth.
• Primate spaces in the maxillary arch are significant for guiding the proper alignment of permanent teeth.
• Generalized or physiologic spaces are characteristic of spaced primary dentition.
• The reduction of deep bite in primary dentition over time is caused by the eruption of permanent teeth.
• When larger permanent teeth erupt in closed primary dentition, they may cause crowding and orthodontic issues.