18 - anatomical and pphysiological features of primary and permenet teeth - morphilogical characteristics of temporary and permenet teeth. Differences between primary and permanent teeth

anatomical and physiological features of primary teeth

• 20 teeth - 8 incisors, 4 canines, 8 molars

• Smaller size teeth than permanent, crown shorter and more bulbous

• Whiter colour due to lower mineral content

• Enamel and dentin layers thinner, making them more prone to wear and decay

• Roots longer and more slender relative to crown size, divergent

• Eruption begins around 6 months and completes around 2-3 years

• more rounded cusps

anatomical and physiological features of permanent teeth

• 32 teeth - 8 incisors, 4 canines, 8 premolars and 12 molars

• Larger crowns

• more yellow colour due to higher mineralization

• enamel is thicker, dentin is denser and less porous

• well formed roots, straighter and more convergent

• Eruption begins around 6 years and is complete around 20 years

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