Stages of tooth development Flashcards
the embryo’s
stomodeum is lined by ectoderm which
gives rise to the oral epithelium
Initiation stage (week 6)
A continuous band of thickened
epithelium called the primary epithelial
band forms around the mouth on the
upper and lower jaws.
Initiation stage (week 6)
The primary epithelial band goes down to the ectomesenchyme.
Initiation stage (week 7)
proliferation or growth of the dental lamina into buds penetrating
into the ectomesenchyme
Bud stage (week 8)
At the end of the bud stage, the maxillary and mandibular arches will
have 10 buds each
Bud stage (week 8)
Morphogenesis – the tooth germ develops into a specific form
depending on the tooth type.
Cap stage (week 9-10)
Proliferation of the dental lamina and ectomesencyme
continues and Differentiation
Cap stage (week 9-10)
-also comes from the
ectomesenchyme and later
will produce the periodontium
(cementum, PDL and alveolar
bone)
Cap stage (week 9-10)
The enamel organ assumes a bell-shaped shape
Bell stage (week 11-12)
The tooth crown assumes its final shape
(morphogenesis)
Bell stage (week 11-12)
The cells that will be making the hard tissues of
the crown (ameloblasts and odontoblasts) will
develop into their final form (differentiation)
Bell stage (week 11-12)
the dental sac increases in the
amount of collagen fibers
around the enamel organ; it will
differentiate into the
periodontal tissues (cementum,
PDL, alveolar bone) later
Bell stage (week 11-12)
Dental tissues secreted as matrix in successive layers.
Apposition stage
When amelogenesis is finished the ameloblasts die thus enamel can no longer be formed.
Late apposition stage
Whereas the dentin continues to form throughout the life of the tooth.
Late apposition stage
