Dentosphere : World of Dentistry

 # 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

 # Which of the following is the BEST way to avoid porcelain failure in all-ceramic restorations? A. Rounded angles of the preparation B. Minimal occlusal forces C. Porcelain is 3.5mm thick D. Porcelain is not more than 0.5mm thick  The correct answer is A. Rounded angles of the preparation. All ceramic restorations should include rounded angles in the tooth preparation in order to reduce stress concentration along these areas. Sharp angles within tooth preparations are areas where stress is concentrated, and may cause fracturing. Porcelain thickness is also an important factor in its fracture toughness. All porcelain crowns should have a minimum thickness of 1mm circumferentially and about 1.5mm along the occlusal/ incisal to achieve strength (Not including the framework of the restoration). Proper case selection and occlusal load analysis is also an important factor in preventing failure of an all ceramic restoration. 

 # What is the primary reason why dentists splint adjacent abutment teeth in a fixed partial denture? A. Improve spacing mesiodistally B. Stabilize abutment teeth C. Improve embrasure contours D. Improve the distribution of the occlusal load  The correct answer is D. Improve the distribution of the occlusal load  Abutment teeth are included in fixed partial dentures to provide retention and help disperse the occlusal load placed on the restoration. Abutment teeth provides support and stability to the pontic. Abutment teeth allows better distribution of the occlusal forces acting on all teeth and pontic in the fixed partial denture.

# When fabricating dentures, what would be the most likely outcome if the lab compressed/packed the acrylic during the rubbery stage? A. Higher porosity than normal B. A lot of extra resin being attached to the denture that will take a long time to trim C. Incomplete picking up of anatomical details D. The denture would have an increased VDO  The correct answer is C. Incomplete picking up of anatomical details Packing and compressing acrylic during denture fabrication should be done in its doughy stage. The doughy stage is the ideal for packing acrylic resin because it is the moment when acrylic is most packable and workable. The rubbery stage of acrylic denotes the start of the setting when heat is released from the setting acrylic. Rubbery acrylic also has a tendency to revert back to its original position regardless of the forces applied to it during packing, resulting in incomplete packing. VDO (Vertical Dimension of Occlusion) is synonymous with OVD (Occlusal Vertical Dimensio...

# 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

# 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...

# 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

# 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

Though we all are aware of the fact that prevention is better and cheaper than cure and it is prudent to take preventive measures in health care rather than curing once we are afflicted by the disease, we seldom apply that in our practice. It is good to see that people are oriented more towards preventive measures and have started to get regular health check up and dental check ups these days. Even the children are getting more care than they used to get in the past, may be because of awareness, availability of health care facilities, or rise in the economic standard of the households. People may not have idea about how they should take care of their child's teeth even if they are willing to. This short article attempts to address the concerns of such parents. 1. When should the first dental visit be? This is a common question people are unsure about. When should they take their children to the dentist ? The first dental visit should be at around the time of eruption of first ...

# 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

# 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

# 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

# Malocclusion can be progressive in: A. Class I B. Class II C. Class III D. Combination of both class I and Class III # Retained mandibular deciduous central incisors will result in: A. Lingual eruption of mandibular permanent incisors B. Labial eruption of mandibular permanent incisors C. Impaction of mandibular permanent incisors D. Ankylosis of mandibular permanent incisors

# 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

# 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

# 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

BDS Annual Examination 2017 VIVA Questions CNS, MSK & Special Senses SET B     Anatomy: a.      Name the type of fibres present in corpus callosum.          (2) b.     What is Bell’s Palsy? Mention its clinical features.               (2) c.      What is pterion? Mention its clinical significance.                (2) d.     What are the structures found in internal acoustic meatus?            (2) e.     What are intrinsic muscles of eye?                               ...

# Acoustic spot in each ampulla of human ear is known as: A. Otolith B. Organ of Corti C. Crista D. Macula # In internal ear, sensory pathces are situated in: A. membranous labyrinth B. cochlea C. stapedial plate D. Fenestra ovalis

# 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

# The feature that distinguishes Herpes Zoster from other Vesiculobullous eruptions is : A. Unilateral occurence B. Severe burning pain C. Prominent crusting vesicles D. Subepidermal bullous formation # A 3 year old child has a fever of 102 degrees F ; and following upper respiratory tract infection discrete vesicles and ulcers on the soft palate and pharynx are noted. The most probable diagnosis is : A. Herpangina B. Scarlet fever C.Rubella D. Herpetic gingivostomatitis # Intra nuclear inclusions detected during the course of Herpes simplex virus infection are called: A. Bacteriophages B. Lipschutz bodies C. Negri bodies D. Donovan bodies # Coxsackie virus causes: A. Infectious mononucleosis B. Lymphoma C. Herpangina D. Herpes # Koplik spots : A. first manifestation of measles B. rarely seen in measles C. are seen 2-3 days after cutaneous rashes D. is ...