Biology
Dental and Oral Biology
967 Questions
Dental and Oral Biology focuses on the structure, development, and function of teeth and oral tissues. It covers key concepts like dental formulas, tooth eruption, and common oral diseases. These topics are essential for medical and biology entrance examinations.
Dental formulaTooth anatomyMilk teethOral diseasesTooth decay
Dental and Oral Biology Questions
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unilateral TMJ ankylosis
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TMJ dislocation
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bilateral TMJ ankylosis
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bilateral condylor fracture
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unilateral condylor fracture
C
Correct answer
Explanation
Bilateral TMJ ankylosis is openbite, relative maxillary hyperplasia, micrognathia with small or deformed chin resulting in bird face.
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dry socket
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cavernous sinus thrombosis
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muscle trismus
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devitalization of teeth
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ankylosis
B
Correct answer
Explanation
Cavernous sinus thrombosis is the severe complication of the canine space infection.
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post ramal approach
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endaural approach
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retroauricular approach
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submandibular approach
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hemicoronal approach
A
Correct answer
Explanation
Post ramal approach: Hind approach.
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odontogenic keratocyst
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stafne's cyst
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dentigerous cyst
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cavernous hemangioma
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traumatic bone cyst
C
Correct answer
Explanation
Dentigerous cyst is clear pale straw coloured fluid.
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Bruxism
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Malocclusion
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Dental Plaque
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Tooth errosion
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Sialadenitis
A
Correct answer
Explanation
Bruxism (gnashing of teeth) is the correct term to explain the clenching of jaw and grinding of teeth.
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teeth
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teethed
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tooths
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toothed
A
Correct answer
Explanation
Teeth is the irregular plural of tooth, following the pattern of Germanic nouns that change their internal vowel rather than adding -s or -es. This is a class 2 mutation where oo changes to ee. Regular pluralization rules don't apply here; you must memorize these irregular forms.
A
Correct answer
Explanation
Tooth enamel, composed mainly of hydroxyapatite, has a mineral content of 96% and ranks 5 on the Mohs scale, making it harder than bone (which contains more collagen and organic material), hair, and nails.
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premolars
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canines
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incisors
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molars
B
Correct answer
Explanation
Canines are the sharp, pointed teeth located between incisors and premolars, designed for tearing and gripping food. Incisors are for cutting, premolars and molars are for grinding.
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Dens evaginatus
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Talon cusp
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Taurodontism
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Dens invaginatus
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Twinning
B
Correct answer
Explanation
Talon cusp is an accessory cuspal structure projecting from cingulum area of anterior teeth and associated with Rubinstein-Taybi syndrome.
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Fusion
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Dilaceration
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Gemination
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Concrescence
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Taurodontism
D
Correct answer
Explanation
Concrescence is a form of fusion of cementum after completion of root formation.
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Talon's cusp
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Dens evaginatus
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Dens invaginatus
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Taurodontism
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Fusion
D
Correct answer
Explanation
Taurodontism is associated with Klinefelter's syndrome.
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Taurodontism is due to failure of Hertwig's sheath to invaginate at proper horizontal level.
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Mostly molars are involved in Taurodontism.
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The pulp chambers are extremely large in Taurodontism.
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Taurodontism is associated with Rubinstein-Taybi syndrome.
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The body of tooth roots is short in Taurodontism.
D
Correct answer
Explanation
Taurodontism is associated with Klinefelters syndrome.
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Dentin dysplasia
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Regional odontodysplasia
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Dentinogenesis imperfecta
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Amelogenesis imperfecta
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Both option1and 2 are correct
A
Correct answer
Explanation
Dentin dysplasia is characterized by normal enamel but atypical dentin formation with abnormal pulpal morphology.
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Ascher's syndrome
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Van der Woud's syndrome
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Parry Romberg syndrome
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Melkersson-Rosenthal syndrome
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Gardener's syndrome
D
Correct answer
Explanation
Melkersson-Rosenthal syndrome is characterized by the lip swelling, fissured tongue and unilateral facial palsy.
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Honey comb appearance is seen in Adenoid cystic carcinoma.
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Pickets fence appearance is seen in Odontogenic keratocyst.
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Saw tooth retepegs appearace is seen in Leukoplakia.
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Starry sky appearance is seen in Burkit's lymphoma.
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Jigsaw puzzle appearance of bone is seen in Paget's disease.
C
Correct answer
Explanation
Saw tooth retepegs appearace is seen in Lichen planus.