Oral Biology & Tooth Morphology, Quizzes of Morphology and Syntax

Download Oral Biology & Tooth Morphology and more Quizzes Morphology and Syntax in PDF only on Docsity! Page | of 12 BDS FIRST PROFESSIONAL EXAMINATION 2007 ORAL BIOLOGY AND TOOTH MORPHOLOGY MODEL PAPER (MCQs) Total Marks: 45 Time Allowed: 45 Minutes Total No. of MCQs: 45 MCQ.1 MCQ.2 MCQ.3 Disturbance of saliva production from the parotid gland is likely to result from damage to which of the following ganglia? a) Gasserian b) Geniculate c) Otic d) Pterygopalatine e) Trigeminal Key:c Topic: Oral Anatomy A 20 year old man falls down and chips the incisal edge of his maxillary central incisor, reducing the length of the crown. A dentist informs him that the tooth may erupt a little to compensate for the loss. This tooth movement is likely to result in increase in size of which of the following dental tissues? a) Cementum b) Dentin c) Enamel d) Periodontal ligament e) Pulp Key:a Topic: Oral Anatomy A patient complains of loss of taste, and a numb sensation in the left half of his tongue, after removal of his left lower wisdom tooth. Which of the following nerves is most likely to have been injured during removal of this tooth? a) Facial nerve b) Glossopharyngeal nerve c) Inferior alveolar nerve d) Lingual nerve e) Mandibular nerve Key: d Topic: Oral Anatomy MCQ.4 MCQ.5 MCQ.6 MCQ.7 Page 2 of 12 BDS FIRST PROFESSIONAL EXAMINATION 2007 ORAL BIOLOGY AND TOOTH MORPHOLOGY MODEL PAPER (MCQs) The position of maximum inter cuspation of upper & lower teeth is referred to as a) Centric position b) Centric occlusion c) Centric relation d) Centric organization e) Centric bite Key: b Topic: Oral Anatomy A person eats a starch rich diet. Saliva from which of the following glands is most likely to be effective in digestion of this food? a) Glamds of von Ebner b) Minor Salivary Glands c) Parotid glands d) Submandibular glands e) Sublingual glands Key:c Topic: Oral Anatomy At the age of nine years, the mandibular permanent first molar has its distal contact with which of the following teeth? a) First premolar b) No distal contact c) Second deciduous molar d) Second permanent molar e) Second premolar Key: b Topic: Oral Anatomy A deep carious lesion in a tooth reaches the pulp. The pulp responds by vasodilatation. There is migration of white blood cells into the pulp. This response is most likely to be initiated by cells in which of the following zones of the pulp? a) Cell free zone b) Cell rich zone c) Odontoblast layer d) Plexus of Raschow e) Pulp core Key:e Topic: Oral Histology MCQ.15 MCQ.16 MCQ.17 MCQ.18 Page 5 of 12 BDS FIRST PROFESSIONAL EXAMINATION 2007 ORAL BIOLOGY AND TOOTH MORPHOLOGY MODEL PAPER (MCQs) Cells that are responsible for the production of reactive dentin are most likely to be present in which of the following areas of pulp? a) Around blood vessels b) Cell free zone c) Cell rich zone d) Pulp core e) Pulp periphery Key:e Topic: Oral Histology Merkel cells are likely to be found in which of the following tissues? a) Epithelium b) Papillary lamina propria c) Periosteum d) Reticular lamina propria e) Submucosa Key:a Topic: Oral Histology Which of the following papillae of the tongue are dome shaped, with taste buds on the superior surface, and are present scattered on the anterior 2/ 3" of the tongue? a) Circumvallate papillae b) Filiform papillae c) Foliate papillae d) Fungiform papillae e) Lingual papillae Key:a Topic: Oral Histology Which of the following areas of enamel is strongest i.e. most resistant to stresses? a) Perikymata b) Enamel tufts c) Gnarled enamel d) Hunter Schregger bands e) Striae of Retzius Key:c Topic: Oral Histology MCQ.19 MCQ.20 MCQ.21 MCQ.22 Page 6 of 12 BDS FIRST PROFESSIONAL EXAMINATION 2007 ORAL BIOLOGY AND TOOTH MORPHOLOGY MODEL PAPER (MCQs) Ameloblasts form conical projections called Tomes Processes during which of the following stages of amelogenesis? a) Desmolytic b) Maturative c) Morphogenic d) Protective e) Secretory Key:e Topic: Oral Histology A child suffers from a febrile illness. During the illness tooth development temporarily slows down. The development resumes normally soon after. This change in development of the tooth structure is most likely to be apparent in which of the following histological features of dentin? a) Dentinal tubules b) Granular layer of Tome’s c) Lines of von Ebner d) Secondary dentin e) Tertiary dentin Key:c Topic: Oral Histology Dentin formation is most likely to be initiated by which of the following parts of the enamel organ? a) Inner enamel epithelium b) Outer enamel epithelium c) Reduced enamel epithelium d) Stellate reticulum e) Stratum intermedium Key:a Topic: Oral Histology Which of the following types of dentin is likely to have the highest mineral content? a) Interglobular b) Inter-tubular c) Mantle d) Secondary e) Sclerotic Key:e Topic: Oral Histology MCQ.23 MCQ.24 MCQ.25 MCQ.26 Page 7 of 12 BDS FIRST PROFESSIONAL EXAMINATION 2007 ORAL BIOLOGY AND TOOTH MORPHOLOGY MODEL PAPER (MCQs) During production of enamel which of the following parts of the enamel organ collapses (disappears) ? a) Inner enamel epithelium b) Outer enamel epithelium c) Reduced enamel epithelium d) Stellate reticulum e) Stratum intermedium Key: d Topic: Oral Histology Which of the following groups of periodontal ligament fibres are most numerous? a) Alveolar crest b) Apical c) Horizontal d) Interradicular e) Oblique Key:e Topic: Oral Histology The highest quantity of inorganic content is likely to be present in which of the following tissues related to teeth? a) Cementum b) Dentin c) Enamel d) Periodontal ligament e) Pulp Key:c Topic: Oral Histology Which of the following histological features of enamel is apparent due to an optical phenomenon? a) Tufts b) Spindles c) Lines of Retzius d) Hunter Schreger bands e) Cross striations Key: d Topic: Oral Histology MCQ.34 MCQ.35 MCQ.36 MCQ.37 Page 10 of 12 BDS FIRST PROFESSIONAL EXAMINATION 2007 ORAL BIOLOGY AND TOOTH MORPHOLOGY MODEL PAPER (MCQs) Repeated exposure of the teeth to gastric contents (e.g. due to vomiting) may result in which of the following conditions? a) Abrasion b) Attrition c) Caries d) Erosion e) Periodontal disease Key: d Topic: Oral Physiology Movement only in the menisco-temporal (upper) compartment of temporomandibular joint takes place in which of the following motions of the mandible? a) Closing fully b) Closing slightly c) Opening slightly d) Opening wide e) Protrusion Key:e Topic: Oral Physiology Which of the following is the last succedaneous tooth to erupt? a) Maxillary canine b) Mandibular canine c) Maxillary first premolar d) Mandibular first premolar e) Mandibular third molar Key:a Topic: Tooth Morphology The identifying number of the permanent mandibular left second molar in the FDI numbering system is: a) 2 b) 17 c) 18 d) 37 e) 52 Key: d Topic: Tooth Morphology MCQ.38 MCQ.39 MCQ.40 MCQ.41 Page 11 of 12 BDS FIRST PROFESSIONAL EXAMINATION 2007 ORAL BIOLOGY AND TOOTH MORPHOLOGY MODEL PAPER (MCQs) The morphology of crown of the tooth is determined at which of the following stages of tooth development? a) Bud stage b) Cap stage c) Early bell stage d) Lamina stage e) Late bell stage Key:c Topic: Tooth Morphology Which of the following is generally the longest root of maxillary permanent 1“ molar? a) Distal b) Distobuccal c) Mesial d) Mesiobuccal e) Palatal Key:e Topic: Tooth Morphology Which of the following sequence of eruption of permanent teeth is normally seen in the maxilla? a) 1,6, 2,4, 3,5,7,8 b) 1, c) 6, d) 6, e) 6, Key: Topic: Tooth Morphology 2,3,4 2,4,3 2,3,4 1,3,4 NNNN © © © © 5, 5, 5, 5, , , , , Own , , , , 6, 1, 1, 2, c The steepest cusp incline is present in which of the following permanent teeth? a) Maxillary first molar b) Maxillary first premolar c) Mandibular first molar d) Mandibular first premolar e) Mandibular second molar Key: b Topic: Tooth Morphology MCQ.42 MCQ.43 MCQ.44 MCQ.45 Page 12 of 12 BDS FIRST PROFESSIONAL EXAMINATION 2007 ORAL BIOLOGY AND TOOTH MORPHOLOGY MODEL PAPER (MCQs) Which of the following is the most poorly developed cusp in maxillary second molar? a) Mesiobuccal b) Mesiolingual c) Distobuccal d) Distolingual e) Cusp of carabelli Key: d Topic: Tooth Morphology A Y shaped occlusal groove is most likely to be present in which of the following teeth? a) Deciduous premolars b) Mandibular first premolar c) Mandibular second premolar d) Maxillary first premolar e) Maxillary second premolar Key:c Topic: Tooth Morphology The roots of which of the following permanent tooth are normally completely formed by age ten years? a) Lower canine b) Lower second molar c) Lower second premolar d) Upper canine e) Upper central incisor Key:e Topic: Tooth Morphology The histology of enamel may be best observed using which of the following methods of slide preparation? a) Decalcified H&E stain b) Exfoliative cytology c) Ground section d) H&E stain e) PAS stain Key:c Topic: Laboratory Assignment