Free Odontogenic Cysts and Tumours MCQs with Answers

• A. Heamagioma
• B. Aneursycimal bone cyst
• C. Central giant cell granuloma
• D. Static bone cyst

Explanation: A static bone cyst is a lingual mandibular bone depression containing salivary gland tissue, so aspiration usually yields little or no…

• A. Dens in dente
• B. Enamel Hypoplasia
• C. Talon's cusp
• D. Enamel Pearl

Explanation: A deep enamel-lined pit on the lingual surface of a maxillary lateral incisor is characteristic of dens invaginatus, also called dens in…

• A. Small teeth with large jaws
• B. Smaller teeth than the normal
• C. Small teeth with small jaws
• D. Large teeth with small jaws

Explanation: True generalized microdontia means that most or all teeth are genuinely smaller than normal, with normally formed jaws.

• A. Enameloma
• B. Taurodontism
• C. Turner's tooth
• D. Ghost teeth

Explanation: A Turner's tooth is a permanent tooth with localized enamel hypoplasia or hypomineralization caused by damage to its developing…

• A. Palatine cyst
• B. Nasopalatine cyst
• C. Mid alveolar cyst
• D. Nasolabial cyst

Explanation: A nasolabial cyst is an extraosseous soft-tissue cyst beneath the nasal ala, so it generally produces no intraosseous radiographic lesion.

• A. Erosion of base above lateral incisor and canine teeth
• B. An avoid shaped radiolucency above the lateral incisor and canine teeth
• C. An inverted funnel shaped radiolucent lesion above the roots of lateral incisor and canine teeth
• D. A pear shaped radiolucent lesion between roots of lateralincisor and canine teeth

Explanation: A nasoalveolar cyst is primarily a soft-tissue lesion, but it may cause superficial erosion of the adjacent maxillary bone, producing an…

• A. Abrasions on two surfaces of single tooth
• B. A deformity of a tooth consisting of a sharp bend bend in the root
• C. A root or tooth that is split into two
• D. A tooth that is fractured at two or more places

Explanation: Dilaceration is an abnormal sharp bend or curvature in the crown or, most commonly, the root of a tooth.

• A. Primary incisors
• B. Primary 2nd molar
• C. Permanent incisors
• D. Permanent 1st molar

Explanation: Developmental enamel defects are particularly common in permanent incisors, where trauma to primary predecessors and systemic disturbances…

• A. Turners hypoplasia
• B. Generalised dental fluorosis
• C. Syphillitic hypoplasia
• D. Rickets hypomineralisation

Explanation: Trauma or infection of a primary predecessor can damage the developing permanent successor and produce a localized yellow-brown enamel…

• A. Ectoderm
• B. Mesoderm
• C. Endoderm
• D. Ecto and Mesoderm

Explanation: Amelogenesis imperfecta primarily affects enamel, which is derived from oral ectoderm.

• A. Hypocalcified dentin
• B. Odonto dysplasia
• C. Dentin dysplasia
• D. Dentinogenesis imperfecta

Explanation: Odontodysplasia produces thin, poorly mineralized dentin with a widened predentin zone, extensive interglobular dentin, and an irregular…

• A. Dentigerous cyst, Globulomaxillary cyst, lateral periodontal cyst, OKC
• B. Dentigerous cyst, Globulomaxillary cyst, radicular cyst
• C. Dentigerous cyst OKC, radicular cyst
• D. 'B' & 'C'

Explanation: Dentigerous cysts, lateral periodontal cysts, globulomaxillary cysts, and odontogenic keratocysts may occur beside vital teeth.

• A. Cervical spine
• B. Mandible
• C. Ethmoid bone
• D. Maxila

Explanation: Melanotic neuroectodermal tumour of infancy most often arises in the maxilla, especially the anterior maxillary region.

• A. Nasopalatine cyst
• B. Naso-alveolar cyst
• C. Globulomaxillary cyst
• D. Median palatal cyst

Explanation: The nasopalatine duct cyst is the most common developmental odontogenic cyst and occurs in the incisive canal region.

• A. Impacted teeth
• B. Unerupted teeth
• C. Ankylosed teeth
• D. Intruded teeth

Explanation: A submerged tooth is usually an ankylosed tooth that has become fused to the alveolar bone and remains below the occlusal plane as…

• A. Permanent third molar
• B. Permanent second premolar
• C. Permanent lateral incisor
• D. Permanent Canine

Explanation: Hypodontia most commonly involves permanent third molars, followed by teeth such as the maxillary lateral incisors and second premolars.

• A. Paramolars
• B. Lateral incisors
• C. Paramolars
• D. Maxillary canine

Explanation: Dens invaginatus is most commonly found in permanent maxillary lateral incisors, where an enamel-lined invagination extends into the…

• A. Maxillary deciduous dentition
• B. Mandibular deciduous dentition
• C. Maxillary permanent dentition
• D. Mandibular permanent dentition

Explanation: Supernumerary teeth occur most frequently in the permanent maxillary dentition, especially as a mesiodens between the upper central…

• A. Amelogenesis imperfecta
• B. Dentinal dysplasia type I
• C. Dentinogenesis imperfecta
• D. Regional odontodysplasia

Explanation: Regional odontodysplasia produces thin, poorly mineralized enamel and dentin with relatively large pulp chambers and open apices, giving…

• A. Cornal dentin dysplasia
• B. Regional odontodysplasia
• C. Dentinogenesis imperfecta
• D. Amelogenesis imperfecta

Explanation: A thistle-tube-shaped pulp chamber is characteristic of coronal dentin dysplasia, also called dentin dysplasia type II, in permanent…