DEVELOPMENT OF MAXILLO – FACIAL AREA AND TEETH.pptx

Maxillo facial

1. DEVELOPMENT OF MAXILLO – FACIAL AREA AND TEETH IN EARLY CHILDHOOD AND PRESCHOOL PERIODS .

2. IN THIS PRESENTATION WE ARE MAINLY DISCUSSING THE OVERVIEW OF :- KEY DEVELOPMENTAL MILESTONES. NORMAL SIGNS MALFORMATIONS “ YOUR ORAL HEALTH IMPACTS YOUR WHOLE BODY , NOT JUST YOUR SMILE.”

3. PRIMARY DENTITION Primary dentition, also known as deciduous dentition or baby teeth, refers to the set of teeth that first appear in a child's mouth. Primary dentition typically consists of 20 teeth, which include 8 incisors, 4 canines, and 8 molars. The eruption of primary teeth usually begins around 6 months of age and continues until the child is around 2 to 3 years old. As the child grows, these primary teeth will gradually fall out and be replaced by permanent teeth, starting around the age of 6 and continuing into the early teenage years. Proper care and maintenance of primary dentition are essential for promoting good oral hygiene and ensuring the healthy development of the permanent dentition.

4. FORMATION OF PRIMARY DENTITION (STAGES) Here is an overview of the stages of primary dentition formation: Initiation : The development of primary teeth begins during the prenatal period, with the initiation of tooth buds in the embryonic stage. Bud Stage : Around the third to fourth month of fetal development. Each primary tooth bud represents a specific type of tooth, such as incisors, canines, or molars. Cap Stage : By the sixth to eighth month of fetal development, the tooth buds enter the cap stage, where they begin to develop distinct layers and structures within the tooth bud, such as enamel, dentin, and pulp.

5. . Bell Stage : During this stage, which occurs around the ninth month of fetal development, the tooth buds further develop into bell-shaped structures, with the differentiation of different tissues and structures within the tooth, such as enamel and dentin formation. Crown Formation : As the fetus approaches full-term development, the crowns of the primary teeth are formed, and mineralization of the enamel and dentin begins. Root Formation : After birth, the primary teeth continue to develop, with the formation of roots that anchor the teeth into the jawbone. Root formation occurs in the first few years of life. Eruption : The final stage of primary dentition formation is the eruption of the teeth into the oral cavity. This process typically begins around 6 months of age and continues until the child is around 2 to 3 years old.

6. Tooth Eruption Date (Avg.) Exfoliation Date (Avg.) Maxillary Central Incisor 8-12 Months 6-7 Years Lateral Incisor 9-13 Months 7-8 Years Canine 16-22 Months 10-12 Years 1st Molar 13-19 Months 9-11 Years 2nd Molar 25-33 Months 10-12 Years .

7. . Mandibular Central Incisor 6-10 Months 6-7 Years Lateral Incisor 10-16 Months 7-8 Years Canine 17-23 Months 9-12 Years 1st Molar 14-18 Months 9-11 Years 2nd Molar 22-31 Months 10-12 Years

8. ERUPTION OF PRIMARY TEETH (BABY TEETH) A child’s central teeth, both upper and lower, are the first to appear and then other teeth erupt sequentially moving toward the back of the arch. The first teeth to erupt are the lower and upper central incisors, which erupt between the ages of 6 12 months. The next to erupt are the lateral incisors between 9-16 months, followed by the first molars from 13-19 months. Next, the cuspids (canines) erupt from 16-23 months. Lastly, between 23 and 33 months, the second molars erupt.

9. PRIMARY DENTION ERUPTION SEQUENCE CHART

10. ANATOMY OF PRIMARY TEETH There are twenty deciduous teeth in total, which means four medial incisors, four lateral incisors, four canines and eight molars. Each of the four oral quadrants that are separated by the midline and into the upper and lower jaw contain five teeth each. The milk teeth are numbered individually with double digits. The first digit represents their quadrant which is either five, six, seven or eight and goes from the upper right side to the upper left side and from there to the lower left side to the lower right in a circle.

11. , The second number represents the order of the tooth in the quadrant and goes from one to five from the midline outwards. There are no deciduous teeth present at birth, but by the time a child has turned three, all twenty teeth will be present.

12. OTHER PRIMARY TOOTH ERUPTION FACTS A common rule is that for every 6 months of life, approximately four teeth will emerge. Boys lag behind girls in tooth eruption. Lower teeth typically emerge before upper teeth. Teeth in both jaws usually erupt in pairs. Primary teeth are smaller and whiter in color than permanent teeth. All primary teeth should have erupted by the time your child is 2 to 3 years of age.