What are the two sets of teeth in humans and what are they called?

Humans have two sets of teeth: deciduous (primary) teeth and permanent (secondary) teeth, making them diphyodont animals.

What are the main stages of tooth development?

Tooth development occurs in five key stages: Dental Lamina Stage, Bud Stage, Cap Stage, Bell Stage, and Apposition Stage. These involve formation from oral ectoderm and neural crest mesenchyme.

When do deciduous and permanent teeth typically erupt?

Deciduous teeth (20 total) begin erupting at 6 months postnatally and are complete by 2 years. Permanent teeth (32 total) start at 6 years and finish between 18–25 years.

How do permanent teeth develop in relation to deciduous teeth?

Permanent teeth form from buds on the lingual side of deciduous teeth during the 3rd month of intrauterine life. They remain dormant until about 6 years, with roots of deciduous teeth resorbed to allow replacement.

What are some common clinical conditions related to tooth development?

Common conditions include anodontia (missing teeth), supernumerary teeth (extra teeth), impacted teeth (delayed eruption), amelogenesis imperfecta (defective enamel), and dentinogenesis imperfecta (defective dentine).

What tissues form the different parts of a tooth during development?

Tooth tissues derive from two sources: enamel comes from oral ectoderm, while dentine, pulp, cementum, and periodontal ligaments originate from neural crest-derived mesenchyme.

Tooth Development – Dental Lamina to Eruption