Sample Test Dentition 1 PDF

 1. **Choose the correct answer:** 2. **Which one of the following premolars does not develop from 4 lobes:** a. **Maxillary first premolar** b. **Maxillary second premolar** c. **Mandibular first premolar** d. **Mandibular second premolar** 3. **How many line...

 1. **Choose the correct answer:** 2. **Which one of the following premolars does not develop from 4 lobes:** a. **Maxillary first premolar** b. **Maxillary second premolar** c. **Mandibular first premolar** d. **Mandibular second premolar** 3. **How many line angles are there in the crowns of mandibular 1st molar?** a. **4 line angles** b. **6 line angles** c. **8 line angles** d. **10 line angels** 4. **Which of the following teeth is/are called non-succedaneous?** a. **Permanent incisors and canines** b. **Premolars** c. **Premolars & permanent canin** d. **Permanent molars** 5. **The transition area of a tooth where one surface ends and another surface begins is called:** a. **Line angle area** b. **Fissure** c. **Ridge** d. **Embrasure** 6. A child normally at the age of 7 years has the following number of teeth a. 16 b. 20 c. 24 d. 28 7. **Root completion of permanent maxillary first molar takes place** a. at birth b. 9-10 years c. 6 years d. 3-4 years 8. **In the mandibular arch , canine erupts** a. Before premolars b. After premolars c. Simultaneously with premolar d. Before incisors 9. **Which of the following permanent teeth appears in the maxillary arch before any deciduous teeth are lost?** a. Lateral incisor b. Central incisor c. 1^st^ molar d. 2^nd^ molar 10. **Beginning of eruption pf permanent tooth starts:** a. After completion of root b. When apical third of the root is still to be formed c. When half of the root is still to be formed d. When root formation starts 11. **At what age the complete deciduous dentition erupt in the oral cavity?** a. 2.5 to 3 years b. 3 to 4 years c. 4-5 years d. 5.5-6.5 years 12. **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, 6, 2, 3, 4, 5, 7,8 c. 6, 1, 2, 4, 5, 3, 7,8 d. 6, 1, 2, 3, 4, 5, 7,8 13. **Which primary tooth is generally accepted as the first to erupt, and at about what mean age?** a. Maxillary central incisor, 8 to 12 months. b. Maxillary central incisor, 7 to 9 months. c. Mandibular central incisor, 6 to 10 months. d. Mandibular central incisor, 8 to 10 months. 14. **Which of the following tooth is the longest in the dental arch?** a. Maxillary 1^st^ molar. b. Mandibular 1^st^ molar c. Maxillary central incisor d. Maxillary canine 15. **When maxillary premolars have two roots they are placed:** a. One mesially and other distally b. One buccally and other lingually c. Both roots are placed lingually d. Both roots are placed buccally 16. **Which statement is true about maxillary 1^st^ premolar cusps?** a. The buccal cusp is about 1 mm longer than lingual cusp b. The lingual cusp is about 1 mm longer than buccal cusp c. Both the lingual and buccal cusps are of same length d. The lingual cusp is about 2 mm longer than buccal cusp 17. **Normally the mandibular 2^nd^ premolar has 3 cusps. Arrange the size of the cusp from largest to smallest:** a. Buccal cusp - Mesiolingual cusp - Distolingual cusp b. Buccal cusp - Distolingual cusp -Mesiolingual cusp c. Mesiolingual cusp - Distolingual cusp -Buccal cusp d. All the cusps have the same length 18. **Which permanent tooth is the 'cornerstone\' of dental arch?** a. Maxillary 2nd molar b. Mandibular 1^st^ molar c. Maxillary canine d. Mandibular canine 19. **The facial aspect of all teeth is represented by:** a. Trapezoid form b. Triangular form c. Rhomboid form d. Diamond form 20. **Mesiolingual grooves may be found on which of the following permanent teeth:** a. Mandibular second premolars b. Mandibular first premolars c. Maxillary first molars d. Maxillary canine 21. **Root bifurcation a more likely finding in which of the following permanent anterior teeth:** a. Maxillary canine b. mandibular canine c. maxillary central incisor d. mandibular lateral incisor 22. **From the incisal view, greater mesiodistal measurement than faciolingual measurement can be seen in which of the following permanent anterior crowns:** a. Maxillary central incisor b. Maxillary canine c. mandibular canine d. mandibular central incisor 23. **Which teeth are the most likely to be congenitally missing?** a. Central incisors b. Lateral incisors c. Third molars d. Canines 24. **In young individual, in cervical cross section in permanent maxillary central incisor, the pulp chamber is roughly:** a. Triangular b. Hexagonal c. Pentagonal d. Rectangular 25. **The maxillary central incisors usually have \-\-\-\-\-\-\-- pulp horns.** a. 1 b. 2 c. 3 d. 4 26. **All of the following teeth have positive contact relation mesially and distally except:** a. Maxillary 1st molar b. Mandibular 1st molar c. Maxillary 2nd molar d. Mandibular 3rd molar 27. **Compared to mandibular arch, maxillary arch is:** a. Narrower b. Broader c. Same width d. No definite relation 28. **When compared with maxillary 1^st^ premolars, The central developmental groove of maxillary 2nd premolar** a. Shorter with multiple supplemental grooves b. Longer with multiple supplemental grooves c. Shorter with lass supplemental grooves d. Longer with less supplemental grooves 29. **How many root canals are there in the lower 1st premolar** a. Two canals b. Four canals c. Three canals d. Five canals 30. **That part of the tooth that seen in the oral cavity is termed** a. Clinical crown b. Clinical root c. Anatomical crown d. Anatomical root 31. **Which part of the tooth is the hardest** a. Enamel b. Dentin c. Cementum d. Pulp I. **True or False :** **1** According to American numbering system the permanent maxillary left second premolar is 25. -------- ---------------------------------------------------------------------------------------------------- -- **2** Shedding of primary teeth usually consumes 4 years. **3** Fissures usually found in the depth of the developmental grooves. **4** The permanent mandibular central incisor is symmetrical while mandibular lateral is not. **5** As a general rule, the outline of the pulp tissue corresponds to the overall outline of the tooth. **6** Mandibular first premolar mostly has two roots. **7** Maxillary premolars are termed cuspid teeth. **8** Generally, on the lingual surface of a maxillary canine there is one fossa. **9** Maxillary lateral incisor has 2 rounded incisal angles. **10** Cervical line is less inclined distally than mesially. II. **Define the following :** 1. **Socket:**............................................................................................................................................................................................................ 2. **Developmental groove:**............................................................................................................................................................................................................ 3. **Cusp:**....................................................................................................\............................................................................................................................................................................................................... 4. **Mamelons:**.................................................................................................................................................................................................................................................................................................................. 5. **Tubercle**..................................................................................................................................................................................\...\...\...\...\...\...\...\...\...\...\...\...\...\...\.................................................................................................. III. IV. **Enumerate the following:** a. **Microanatomy of the tooth** 1. 2. 3. 4. 5. b. c. **Landmarks found on Occlusal aspect of upper first premolar** 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. d. e. **Periodontium** 1. 2. 3. 4. 5. f. g. **Landmarks found on lingual aspect of [newly erupted] Permanent central incisors** 1. 2. 3. 4. 5. 6. 7. V. **Draw a labeled diagram illustrating the following: (30 Marks)** **1- [F.D.I]** Numbering System**:** 2. **Lingual aspect of Permanent Maxillary canine:** VI. **Compare between the following :** Upper central Upper lateral --- ---------------------- --------------- --------------- 1 Size 2 Mesio- incisal angle 3 Disto-incisal angle 4 Lingual fossa 5 Lingual pit Upper premolars Lower premolars --- ----------------- ----------------- ----------------- 1 size 2 cusps 3 Proximal aspect 4 Dimension 5 Roots Upper Canines Lower Canines --- --------------- --------------- --------------- 1 Crown size 2 Labial ridge 3 Contact areas 4 Lingual fossa 5 Root length 1. *Dentition* refers to the teeth present in a. Deciduous and permanent dentition b. Maxillary and mandibular bones c. Permanent dentition d. Mandibular bones 2. The mixed dentition commences at about age a. 3 years b. 5 years c. 6 years d. 7 years 3. According to two digit system 11 is a. Maxillary left central incisor b. Maxillary left lateral incisor c. Maxillary right central incisor d. Maxillary right lateral incisor 4. According to two digit system 53 is a. maxillary left deciduous canine b. mandibular left deciduous canine c. maxillary right deciduous canine d. mandibular right deciduous canine 5. According to two digit system 16 is a. maxillary left 1^st^ molar b. mandibular left 1^st^ molar c. maxillary right 1^st^ molar d. mandibular right 1^st^ molar 6. K is a. maxillary left deciduous 2^nd^ molar b. mandibular left deciduous 2^nd^ molar c. maxillary right deciduous 2^nd^ molar d. mandibular right deciduous 2^nd^ molar 7. \# 6 is a. maxillary left canine b. mandibular left canine c. Maxillary right canine d. mandibular right canine 8. \# 20 is a. maxillary left 2^nd^ premolar b. mandibular left 2^nd^ premolar c. maxillary right 2^nd^ premolar d. mandibular right 2^nd^ premolar 9. The substance covers the surface of the root is a. Enamel b. Dentin c. Cementum d. Bone 10. Surface that articulates with an antagonist tooth in an opposing arch is called a. Proximal b. Incisal c. Apical d. Occlusal 11. The point angles of an anterior tooth are **...........** in number a. 10 b. 8 c. 6 d. 4 12. Three cusp type premolars are formed from a. Three lobes b. Four lobes c. d. 13. The elevation on the lingual surface of incisors or canines is called a. Cusps b. Cingulum c. Lobes d. Mamelons 14. The ridge runs cervico-incisally at the center of the labial surface of the canines is called a. Cervical ridge b. Buccal ridge c. Incisal ridge d. Labial ridge 15. A small pinpoint depression located at the junction of developmental grooves is called a. true pit b. fault pit c. central pit d. junctional pit 16. Emergence of teeth into the oral cavity is called a. Eruption b. Shedding c. Attrition d. Exfoliation 17. Root completion of deciduous teeth occurs after eruption by about a. 1 year b. 3 years c. 5 years d. 7 years 18. Beginning of calcification for 1^st^ premolars occurs at about a. At birth b. 1.5-2 y c. 2-2.5 y d. 2.5-3 y 19. [ ] The permanent 2^nd^ molars erupted into the oral cavity at about a. 11-13 y b. 9-10 y c. 12-16 y d. 10-12 y 20. In permanent teeth except 3^rd^ molar, all crowns are completed at about a. 8 y b. 16 y c. 8 m d. 16 m 21. At 21 years, number of teeth visible in the oral cavity are a. 20 b. 24 c. 28 d. 32 22. The crown shape of the labial aspect of the maxillary lateral incisor is a. Round b. Trapezoid c. Triangle d. Oval 23. On freshly erupted, unworn central incisors there are a. Three lobes b. Three mamelons c. Three cusps d. Three tubercles 24. In the mandibular central incisor a. Mesial marginal ridge is shorter than the distal marginal ridge b. Mesial marginal ridge is longer than the distal marginal ridge c. Mesial marginal ridge is equal to the distal marginal ridge d. Mesial marginal ridge is only found and the distal is absent 25. The incisal ridge of the maxillary lateral incisor is aligned a. Labial to the long axis b. Lingual to long axis c. Centralized on the long axis d. Proximal to the long axis 26. Mesial contact area of the maxillary lateral incisor is located a. At cervical third b. At middle third c. At incisal third d. At junction of incisal and middle third 27. The angle of the maxillary canine cusp is nearly a. 90^o^ b. 105^o^ c. 120^o^ d. 125^o^ 28. Due to attrition, the incisal edge of the maxillary incisors slopes a. Labially b. Lingually c. Mesially d. Distally 29. the mesial slope of the buccal cusp being straight and longer than the distal slope in a. maxillary 1^st^ premolar b. maxillary 2^nd^ premolar c. maxillary canine d. mandibular canine 30. Crown outline of the occlusal aspect of the mandibular 1^st^ premolars is a. Diamond b. Oval c. Trapezoid d. Hexagonal 31. The root canal/s of the maxillary 1^st^ premolars in cross section appear a. Circular b. Tapered c. Triangular d. Oval 32. Teeth which have the largest occlusal surfaces are a. Maxillary incisors b. Maxillary canines c. Maxillary premolars d. Maxillary molars 33. The mesial cusp slope of the............. is longer than the distal one in a. Mandibular deciduous canine b. maxillary deciduous canine c. maxillary permanent canine d. mandibular permanent canine 34. In premolars and molars, the maximum convexity is located at the cervical ⅓ buccally and at the middle third lingually except the a. mandibular 1^st^ premolar b. maxillary 2^nd^ premolar c. mandibular 1^st^ premolar d. mandibular 2^nd^ premolar **Q1: [Complete the following]:** 1. Root completion takes place in permanent maxillary lateral incisor at the age.............................................................................. 2. How many roots are present in the trifurcated.................................and a bifurcated tooth?\...\...\...\...\...\...\...\...\...\...\.... 3. Which proximal surface is farther away from the midline?\...\...\...\...\...\...\...\...\..., and which is the closest to the midline?\...\...\...\.... 4. Premolar term is more accurate than bicuspid because.......................................................................................................................................................................................................................................................................................... 5. The tooth which usually has the largest root in the mouth is the........................................... 6. The proximal aspect of mandibular posterior teeth is represented by........................ and of the maxillary posterior teeth is represented by................................................ 7. Lobes required for development of maxillary premolars are...................................... 8. The identifying number of the permanent mandibular left second molar in the FDI numbering system is.................................................... 1. 1. **At what age do the primary mandibular canines usually exfoliate?** A- 6-7 year B- 8-9 year C- 10-11 year D- 12-13 year 2. **The ridge found on the linguo-cervical third of anterior teeth is called the:** A- Lingual ridge B- Marginal ridge C- Oblique ridge D- Cingulum **3- What cell type is the one that forms dentin?** A. odontoblast B. osteoclast C. ameloblast D. osteoblast E. cementoblast **4- Which premolar would be the most likely to have a single pulp horn?\ **A. Maxillary first. B. Mandibular first.\ C. Mandibular second. D. Maxillary second **5-Which one of the following is not a normal anatomical feature of mandibular incisors?\ ** A. Bifurcated roots. B. Inconspicuous cingula.\ C. Four developmental lobes. D. Incisal edges placed slightly linguaIly. **6-The heights of contour of the distal surfaces of permanent mandibular central incisors are located in which coronal third? *\ *** A. Middle. B. Cervical. C. Occlusa1. D. Incisal. **[Q3- For each numbered statement select the letter of the best answer]:** -- -------------------------------------------------------------------------------------- 8- The transition area of a tooth where one surface ends and another surface begins. -- -------------------------------------------------------------------------------------- [ **Q4- Give reasons for the following**]**:** 1. Lingual aspect of most teeth is narrower than facial............................................................................................................................ 2. Root surface of the permanent maxillary canines have developmental depressions mesially and distally........................................................................................ 3. The pulp cavities become narrower with age................................................................................................................ **[Examine the following photograph and then answer the following]: (3 marks) [ ]** - Can you tell the following? 1. 2. 3. 4. 5. 6.