Developmental Soft Tissue Abnormalities
Odontogenic Cysts
Nonodontogenic Cysts
Abnormalities in Number and Size of Teeth
Abnormalities in Tooth Shape & Structure
100

This condition is an extensive adhesion of the tongue to the floor of the mouth.

What is ankyloglossia?

100

This cyst forms around the crown of an unerupted or impacted tooth.

What is a dentigerous cyst?

100

This cyst occurs within the nasopalatine canal and may appear heart-shaped radiographically.

What is a nasopalatine duct cyst?

100

The congenital absence of all teeth is called this condition.

What is anodontia?

100

This occurs when a single tooth germ attempts to divide into two.

What is gemination?

200

These epithelium-lined blind tracts are located at the corners of the mouth.

What are commissural lip pits?

200

This cyst appears as swelling of gingival tissue around an erupting tooth.

What is an eruption cyst?

200

This cyst occurs in the midline of the hard palate and appears as a well-defined radiolucency.

What is a median palatine cyst?

200

This condition describes the absence of one or more teeth.

What is hypodontia?

200

This occurs when two adjacent tooth germs unite to form one large tooth.

What is fusion?

300

This occurs when thyroid tissue fails to migrate from the foramen cecum to the neck.

What is a lingual thyroid?

300

This cyst develops in place of a tooth and often occurs where a third molar should form.

What is a primordial cyst?

300

This soft tissue cyst occurs in the mucobuccal fold near the maxillary canine and is more common in females.

What is a nasolabial cyst?

300

What is hypodontia?

What are supernumerary teeth (hyperdontia)?

300

This anomaly causes a sharp bend in the root of a tooth.

What is dilaceration?

400

This surgical procedure is commonly used to treat ankyloglossia.

What is a frenotomy?

400

In 2005, this cyst was reclassified by the WHO as a keratocystic odontogenic tumor due to its aggressive behavior.

What is an odontogenic keratocyst (OKC)?

400

This cyst commonly appears as a yellowish raised nodule on the floor of the mouth or tongue.

What is a lymphoepithelial cyst?

400

This is the most common supernumerary tooth found between maxillary incisors.

What is a mesiodens?

400

This accessory cusp occurs on the cingulum of incisors and may contain a pulp horn.

What is a talon cusp?

500

This type of disorder is present at birth and may or may not be inherited.

What is a congenital disorder?

500

This cyst contains characteristic ghost cells and may have radiopacities.

What is a calcifying odontogenic cyst (Gorlin cyst)?

500

This cyst forms along the developmental tract of the thyroid gland.

What is a thyroglossal duct cyst?

500

Teeth that are smaller than normal are described with this term.

What is microdontia?

500

This condition occurs when the enamel organ invaginates into the crown of a tooth, creating a “tooth within a tooth.”

What is dens in dente (dens invaginatus)?

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