Week 1 - Developmental Disorders

Question 1

2 types of Congenital Disorders

Answer 1

• Inherited disorder

- Developmental disorder

Question 2

Inherited Disorder

Answer 2

Caused by an abnormality in genetic make up

Question 3

Developmental Disorder

Answer 3

Failure during process of cell division and differentiation

Question 4

Ankyloglossia

Answer 4

• Soft Tissue Abnormality
• Extensive adhesion of tongue to the floor of the mouth
• Treatment = frenectomy

Question 5

Commisural Lip Pits

Answer 5

• Soft Tissue Abnormality
• Epithelium lined ‘pits’ at the corner of the mouth
• Treatment: none, not harmful

Question 6

Lingual Thyroid

Answer 6

• Soft Tissue Abnormality
• Small mass of thyroid tissue on the tongue.
• From thyroid not migrating properly during development
• Treatment: removal if obstructing

Question 7

Cyst

Answer 7

• Abnormal fluid filled epithelium lined sac or cavity

- Treatment: usually removal

Question 8

Developmental Cyst Properties

Answer 8

• can cause expansion of bone
• can be intraosseous or extraosseous
• appear as well circumscribed radiolucenies
• unilocular or multilocular

Question 9

A cyst forming around the crown of an unerupted tooth such as the 3rd molar

Answer 9

Dentigerous Cyst (aka follicular cyst)

Question 10

A cyst that creates a ‘balloon’ on the gingiva/soft tissue.

Answer 10

Eruption Cyst

Question 11

A cyst that develops in place of a tooth, usually a 3rd molar

Answer 11

Primordial Cyst

Question 12

A cyst seen in the mand 3rd molar region that can require curettage to treat as it has a high recurrence rate

Answer 12

Odontogenic Keratocyst (OKC)
(aka KOT)

Question 13

A cyst that is lined by odontogenic epithelium and features ghost cells microscopically

Answer 13

Calcifying Odontogenic Cyst (COC)

Question 14

A cyst seen most often in the mand cuspid/premolar region on the lateral surface of the root. Most often in males.

Answer 14

Intraosseous: Lateral Periodontal Cyst
Extraosseous: Gingival Cyst (seen clinically)
Multilocular: Botryoid Odontogenic cyst

Question 15

Anodontia

Answer 15

Developmental lack of ALL teeth

Question 16

Hypodontia

Answer 16

Lack of one or more teeth

- tends to be familial or component of a syndrome

Question 17

Most common missing deciduous tooth

Answer 17

Mand incisor

Question 18

Most common missing adult teeth

Answer 18

3rd molars
Max laterals,
Mand 2nd premolar

Question 19

Supernumerary Teeth

Answer 19

Extra Teeth resulting from formation of extra tooth buds
Most often seen in the max
Multiple: Gardner syndrome

Question 20

Supernumerary tooth located between the max incisors

Answer 20

Mesiodens

Question 21

Supernumerary tooth located distal to the 3rd molar

Answer 21

Distomolar

Question 22

Microdontia

Answer 22

• One or more teeth are smaller than normal
• Single tooth more common
• Max laterals and max 3rd molars

Question 23

Generalized relative micro/macrodontia

Answer 23

Normal teeth appearing small in a large jaw, or small in a large jaw

Question 24

Macrodontia

Answer 24

One or more teeth larger than usual

Question 25

What is the most common oral cyst?

Answer 25

Radicular cyst | *NOT a developmental cyst, it is from trauma

Question 26

A cyst located within the nasopalatine canal or incisive papilla, sometimes it is heart shaped

Answer 26

Nasopalatine Canal Cyst (non-odontogenic)

Question 27

A cyst located in the MIDLINE of the hard palate

Answer 27

Median Palatine Cyst (non-odontogenic)

Question 28

A cyst located between the roots of the max lateral incisor and canine - nowhere else!

Answer 28

Globulomaxillary Cyst (non-odontogenic)

Question 29

A cyst located in the midline of the mandible, below the apices of the mand incisors

Answer 29

Median Mandibular Cyst (non-odontogenic)

Question 30

A soft tissue cyst that causes a swelling in the mucobuccal fold/floor of the nose

Answer 30

Nasolabial Cyst (non-odontogenic)

Question 31

A cyst found in the major salivary glands, on the floor of the mouth

Answer 31

Branchial Cleft Cyst (non-odontogenic)

Question 32

A raised nodule on the skin of the face or neck

Answer 32

Epidermal Cyst (non-odontogenic)

Question 33

A cyst often present at birth, on the floor of the mouth. May feel doughy.

Answer 33

Dermoid Cyst (non-odontogenic)

Question 34

A cyst that forms along the tract of the thyroid

Answer 34

Thyroglossal Tract Cyst (non-odontogenic)

Question 35

What makes a pseudocyst different to other cysts?

Answer 35

There are NOT epithelium lined

Question 36

An anatomic depression on the posterior lingual area of the man, inferior to the mand canal

Answer 36

Static Bone Cyst (pseudocyst)

Question 37

Pathologic cavity in bone that is not epithelium lined, aka S.H.I.T. Scallops around the teeth.

Answer 37

Simple Bone Cyst (pseudocyst)

Question 38

Blood filled spaces surrounded by cells and fibrous tissue. Have a honeycomb appearance.

Answer 38

Aneurysmal Bone Cyst (pseudocyst)