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Showing posts with the label Dentistry mcqs

Final stage of tooth development

 # What is the final stage of tooth development? a. Crown formation. b. Root formation and eruption. c. Function. d. Dentinogenesis and amelogenesis. The correct answer is C. Function. Crown formation is followed by root formation and eruption. Root formation and eruption are followed by function. Function is the final stage of tooth development. Dentinogenesis and amelogenesis are followed by crown formation. CLICK HERE FOR MORE MCQs

The ‘ugly duckling stage’ is characterized by:

 # The ‘ugly duckling stage’ is characterized by: A. Distoangular axial inclination of the crown of maxillary incisors B. Deep overbite C. Mandibular lateral incisors erupting lingual to mandibular central incisors D. Maxillary lateral incisors erupting lingual to maxillary central incisors The correct answer is A. Distoangular axial inclination of the crown of maxillary incisors. In some children, the maxillary incisors flare laterally and are widely spaced when they first erupt, a condition often called the "ugly duckling" stage. The position of the incisors tends to improve when the permanent canines erupt, but this condition increases the possibility that the canines will become impacted. Ref: Contemporary Orthodontics, Proffit, Fourth Edition, Page no. 101 CLICK HERE FOR MORE MCQs

Opening of submandibular gland duct:

 # The opening of submandibular gland duct into oral cavity is at: A. Maxillary Second molar B. Mandibular third molar C. Dorsum of tongue D. Sublinugual caruncle The correct answer is D. Sublingual caruncle. Submandibular duct or Warthin's duct is 5 cm long, emerges from submandibular gland and in its course runs on the hyoglossus between lingual and hypoglossal nerve and opens at the sublingual papilla at the side of frenum of tongue. CLICK HERE FOR MORE MCQs

Excess height of the posterior palatal seal

 # Excess height of the posterior palatal seal of a complete maxillary denture will usually result in which of the following? A. Gagging B. Increased retention C. A tingling or tickling sensation D. Unseating of the denture The correct answer is D. Unseating of the denture. Over contouring or excessive beading of the posterior palatal seal causes too much pressure to be exerted on the palatal tissues resulting in the unseating of upper dentures. The posterior palatal seal is typically placed approximately on the vibrating line between the hard and soft palate and provides a physiologically acceptable tissue pressure within the compressible portion of the soft palate to attain retention and peripheral seal. Over extending the coverage of seal will cause gaggling and painful swallowing for the part of the patient. 

Oral manifestation of Achondroplasia

 # An outstanding oral manifestation of achondroplasia is: A. Rampant caries B. Periodontal disease C. Overcrowding of teeth D. Supernumerary teeth The correct answer is C. Overcrowding of teeth. Achondroplasia is the most common form of short-limb dwarfism. It occurs in all races and with equal frequency in males and females. An individual with achondroplasia has a disproportionate short stature -- the head is large and the arms and legs are short when compared to the trunk length. Other signs are a prominent forehead and a depressed bridge of the nose. Many of these children die during the first year of life. Deficient growth in the cranial base is evident in many children that survive. Important: The maxilla may be small with the resultant crowding of the teeth. Note: A Class III malocclusion is very common. Remember: The oral manifestations of the following disorders in children: • Gigantism: enlarged tongue, mandibular prognathism, teeth are usually tipped to the buccal or lin...

Chronic Lymphocytic thyroiditis refers to:

# Chronic Lymphocytic thyroiditis refers to: a) Tuberculous thyroiditis  b) Hashimoto's thyroiditis c) Dequervain's thyroiditis  d) Riedel's thyroiditis The correct answer is B. Hashimoto's Thyroiditis. Hashmimoto's thyroiditis: • Most common type of thyroiditis • Autoimmune; raised titres of thyroid antibodies. • Mild hyperthyroidism may be present initially but hypothyroidism is inevitable. • Characteristic 'bosselated' feel with soft, rubbery or firm in consistency; Hurthle cells present. CLICK HERE FOR MORE MCQs

MCQs on Oral Pre-cancer and Oral Cancer - Oral Medicine and Radiology

# The current “gold standard” for predicting the malignant potential of the precancerous lesions is the: A. presence & degree of dysplasia B. presence of candidal hyphae C. presence of red areas in the lesion D. site of the lesions # Which of the following viruses is not an oncovirus? A. Herpes Simplex Virus B. Human Papilloma Virus C. Varicella zoster Virus D. Epstein Barr Virus # Which type of inflammatory cells predominate in the infiltrate of invasive carcinoma? A. Monocyte B. T lymphocyte C. CD 8 lymphocyte D. Langerhan's cell # The fixation of lymph nodes to adjacent tissues in cases of malignancy is due to: A. Secondary infection B. protective mechanism of body C. invasion of malignant cells through capsule D. matting of lymph nodes # Which of the following is not a Tumor suppressor gene? A. p53 B. p161NK4A C. bcl – 2 D. FHIT (fragile histidine tri...

MCQs in Endodontics - Disinfection and Obturation

# Obturation of a root canal should achieve: A. Tug back B. Hermetic seal C. Fluid free seal D. All of the above # The purpose of a root canal sealer is to: A. seal the tubules of the dentine B. stimulate healing in periapical region C. prevent discoloration D. fill the space between solid core material and pulp canal walls

MCQs in Periodontology - Periodontal Instrumentation

# All of the following are contraindications for root planing except: A. deficient or overhanging margins of amalgam restorations B. erosion and/or abrasion C. recession D. root caries # While sharpening curettes and sickles, the internal angle of ________ must be preserved between the face and lateral surface. A. 50-60 B. 60-70 C. 70-80 D. 80-90

MCQs in Oral Radiology - Biological Effects of Radiation

# Which of the following are most sensitive to X ray? A. Tooth buds and salivary glands B. Nerve and muscle tissue C. Hair and nails D. Cartilage # The most radiosensitive cells in the body are: A. Endothelial cells B. Epithelial cells C. Red blood cells D. White blood cells

MCQs in Periodontology - Gingivitis

# A thin bluish line around the gingival margin is due to the absorption of: A. Silver B. Mercury C. Drugs like Tetracycline D. Lead # McCall's festoons are: A. also called Stillman's clefts B. due to poor oral hygiene C. Congenital abnormality D. Due to trauma from occlusion

MCQs on Growth and Development - Orthodontics

# Growth site of the mandible is in the : A. Body B. Condylar cartilage C. Coronoid process D. Ramus # Maxilla develops by : A. Endochondral bone formation B. Intramembranous bone formation C. cartilage replacement and intramembranous bone formation D. mostly cartilage replacement and a little by intramembranous

MCQs on Development of Dentition - Orthodontics

# In children, median diastema between maxillary permanent incisors closes with the eruption of: A. Maxillary permanent first premolars B. Maxillary permanent lateral incisors C. Maxillary permanent canines D. Maxillary permanent second molars # The average "Leeway space" available in each half of the maxilla is approximately: A. 0.9 mm B. 2.9 mm C. 4.0 mm D. 6.9 mm

MCQs on Child Psychology - Pedodontics

# Most realistic approach in managing a difficult child in dental clinic is: A. Disregard the behavior of child B. Make child familiar with clinical atmosphere C. Physical methods to make child accept the treatment D. None of the above # Hand over mouth exercise (HOME) is effective behavioral modification technique in the age group of: A. 3 to 6 years B. Under 3 years C. 6 to 9 years D. Above 9 years

MCQs on Removable Partial Dentures : Introduction and Classification

# Class IV Kennedy classification is: A. Bilateral edentulous area located posterior to the remaining natural teeth B. Unilateral edentulous area located posterior to the remaining natural teeth C. Unilateral edentulous area with natural teeth remaining both anterior and posterior to it D. A single but bilateral (crossing the midline) edentulous area located anterior to the remaining natural teeth # A distal extension partial denture receives its support : A. From terminal abutments B. Equally from abutments and the residual ridges C. Mostly from residual ridge D. Exclusively from residual ridge

MCQs on Oral Manifestations of Systemic Diseases

# Delayed eruption of at least part of the dentition is a recognized feature of all of the following EXCEPT: A. Rickets B. Congenital Hyperthyroidism C. Cleidocranial Dysplasia D. Cherubism # A five year old child presents with chronic bed wetting and bilateral loose deciduous first molars. His mother says that he wants to drink water several times during each night. Which of the following is the most likely diagnosis? A. Hand-Schuller-Christian Disease B. Marble bone Disease C. Niemann Pick Disease D. Polyostotic Fibrous Dysplasia