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🦷 Dental anatomy lec 16 🦷

20.How many teeth are there in the deciduous dentition? a) 20 b) 32 c) 28 d) 16 21.Which of the following statements is true about the size of deciduous teeth? a) Deciduous teeth are larger in all dimensions compared to permanent teeth. b) Deciduous teeth and permanent teeth have similar dimensions. c) Deciduous teeth are smaller in all dimensions compared to permanent teeth. d) Deciduous teeth are the same size as permanent teeth in the buccolingual dimension. 22.Which type of teeth shows less morphological variations? a) Deciduous teeth b) Permanent teeth c) Both show similar variations d) It depends on the specific tooth type 23.Which of the following statements is true regarding the enamel of deciduous teeth? a) The enamel of deciduous teeth is whiter and more opaque than permanent teeth. b) The enamel of deciduous teeth is less opaque and less white compared to permanent teeth. c) The enamel of deciduous teeth and permanent teeth have similar characteristics. d) The enamel of deciduous teeth is thicker than permanent teeth. 24.What can be said about the crown morphology of deciduous teeth? a) The crowns of deciduous teeth are less constricted at the cervix. b) The cervical ridges in deciduous teeth are less prominent. c) The intercuspal distance of deciduous teeth is less constricted buccolingually. d) The crowns of deciduous anterior teeth are narrower mesiodistally compared to the crown’s length. 25.What is a notable difference in the root structure of deciduous teeth? a) Presence of root trunk in deciduous molars b) Longer and stronger roots compared to permanent teeth c) Shorter, weaker, and narrower roots d) Roots that are equal in length to the crown 26.Why are the roots of deciduous molars wider than the crown? a) To allow more room for the development of permanent successors b) To provide better stability for chewing c) Due to variations in root formation patterns d) It is a characteristic common to all deciduous teeth Answers: 20.a) 20 21.c) Deciduous teeth are smaller in all dimensions compared to permanent teeth. 22.a) Deciduous teeth 23.a) The enamel of deciduous teeth is whiter and more opaque than permanent teeth. 24.d) The crowns of deciduous anterior teeth are wider mesiodistally compared to the crown’s length. 25.c) Shorter, weaker, and narrower roots 26.a) To allow more room for the development of permanent successors فريق العطار يحتويكم 🤍 ويانه طب اسنان غير ⚡️

14.How do mandibular deciduous central and lateral incisors compare to permanent mandibular incisors? a) They are narrower mesiodistally in relation to their length. b) They are wider mesiodistally in relation to their length. c) They have a similar mesiodistal width compared to permanent mandibular incisors. d) Their root-to-crown ratio is decreased. 15.Which dimension appears more pronounced in mandibular deciduous central and lateral incisors? a) Mesiodistal dimension b) Labiolingual dimension c) Buccolingual dimension d) Incisal-gingival dimension 16.How does the labiolingual dimension of the mandibular deciduous canine compare to the maxillary deciduous canine? a) It is much greater than the maxillary deciduous canine. b) It is similar to the maxillary deciduous canine. c) It is much less than the maxillary deciduous canine. d) There is no significant difference in the labiolingual dimension. 17.What can be said about the distal slope of the cusp in mandibular deciduous canines? a) It is smaller than the mesial slope. b) It is larger than the mesial slope. c) It is equal in size to the mesial slope. d) There is no distinct distal slope in mandibular deciduous canines. 18.How many cusps are present on the first mandibular deciduous molar? a) Two b) Three c) Four d) Five 19.How many roots are present in the second mandibular deciduous molar? a) One b) Two c) Three d) Four Answers: 14.b) They are wider mesiodistally in relation to their length. 15.b) Labiolingual dimension 16. c) It is much less than the maxillary deciduous canine. 17.a 18.c 19.b

6.How many deciduous teeth are there? a) 10 b) 20 c) 32 d) 28 7.At what age do deciduous teeth start erupting? a) 3 months b) 6.5 months c) 12 months d) 2 years 8.Which of the following is NOT an importance of deciduous teeth? a) Proper mastication b) Prevention of malocclusion c) Guiding eruption of permanent teeth d) Enhancing esthetics e) Improving phonetics 9.After eruption, what process occurs to the roots of deciduous teeth? a) Calcification b) Exfoliation c) Resorption d) Eruption 10.Which of the following statements is true about maxillary deciduous central and lateral incisors? a) The labiolingual dimension is greater than the mesiodistal width. b) The root-to-crown ratio is decreased. c) The crown appears thicker from the mesial aspect. d) The crown appears longer due to the long crown’s length. 11.Which aspect of the canine crown is more constricted at the cervical area? a) Lingual aspect b) Mesial aspect c) Labial aspect d) Distal aspect 12.How many cusps are present on the first deciduous molar? a) Two b) Three c) Four d) Five 13.How many roots are present in the second deciduous molar? a) One b) Two c) Three d) Four Answers: 6.b) 20 7.b) 6.5 months 8.d) Enhancing esthetics 9.c) Resorption 10. c) The crown appears thicker from the mesial aspect. 11.c) Labial aspect 12.c) Four 13.b) Two

1. During tooth development, which stages are named according to their shapes? a) Bud stage, Cap stage, and Bell stage b) Incisor stage, Molar stage, and Canine stage c) Primary stage, Secondary stage, and Tertiary stage d) Enamel stage, Dentin stage, and Pulp stage 2. What is the process called when the tooth penetrates the mucous membrane and enters the mouth? a) Erosion b) Exfoliation c) Eruption d) Enamelization 3. At what point does the eruption of a tooth typically stop? a) When the root and crown are fully formed b) When the tooth reaches its maximum size c) When it contacts the adjacent teeth d) When the tooth is fully occluded with a tooth in the opposing jaw 4. Which tooth is the first to erupt in the mandibular arch? a) Mandibular central incisors b) Mandibular lateral incisors c) Mandibular first molars d) Mandibular canines 5. At what age does the eruption of the maxillary second molars typically occur? a) 6.5 months b) 12-16 months c) 16-20 months d) 20-30 months Answers: 1. a) Bud stage, Cap stage, and Bell stage 2. c) Eruption 3. d) When the tooth is fully occluded with a tooth in the opposing jaw 4. a) Mandibular central incisors 5. d) 20-30 months

🦷 Dental anatomy lec 15 🦷

21.The mandibular third molar is more similar to the: A. First molar regarding the number of cusps and occlusal form. B. Second molar regarding the number of cusps and occlusal form. C. First molar regarding the size of the tooth. Correct Answer: B 22.The mandibular third molar has a tendency for a: A. More rounded occlusal outline. B. Smaller bucco-lingual dimension distally. C. Both A and B. Correct Answer: C 23.The size of the mandibular third molar is variable, ranging from: A. Large teeth larger than the second molar with five or more cusps to dwarfed (small) teeth. B. Large teeth larger than the first molar with five or more cusps to dwarfed (small) teeth. C. Small teeth smaller than the second molar with five or more cusps to dwarfed (large) teeth. Correct Answer: A 24.The mandibular third molar usually has: A. Two short roots, one mesial and one distal. B. One long root. C. Three short roots. Correct Answer: A 25.The roots of the mandibular third molar are usually: A. Shorter than the roots of the first or second molars. B. Longer than the roots of the first or second molars. C. The same length as the roots of the first or second molars. Correct Answer: A 26.The roots of the mandibular third molar have a greater tendency for: A. Mesial inclination in relation to the occlusal plane. B. Distal inclination in relation to the occlusal plane. C. No inclination in relation to the occlusal plane. Correct Answer: B 27.Sometimes the mandibular third molar has: A. More than two roots. B. Fused roots. C. Both A and B. Correct Answer: C 28.The mandibular third molar can be: A. Congenitally missing. B. Present in all individuals. C. Only present in some individuals. Correct Answer: A 29.The mandibular third molar is also known as the: A. Wisdom tooth. B. Molar tooth. C. Canine tooth. Correct Answer: A 30.The mandibular third molar is usually extracted because: A. It is not needed for chewing. B. It is often impacted. C. Both A and B. Correct Answer: C

11.When viewed from the lingual aspect, the maxillary second molar: A. Has a more pronounced buccal cervical ridge than the first molar. B. Has a more pronounced lingual cervical ridge than the first molar. C. Has a less pronounced buccal cervical ridge than the first molar. D. Has a less pronounced lingual cervical ridge than the first molar. Correct Answer: C 12.The contact areas on the lingual aspect of the maxillary second molar are: A. More noticeable than those on the first molar. B. Less noticeable than those on the first molar. C. The same as those on the first molar. Correct Answer: A 13.The mesial root of the maxillary second molar has a: A. Pointed apex. B. Blunt apex. C. Rounded apex. Correct Answer: A 14.The distal aspect of the maxillary second molar is similar in form to the first molar except for the absence of a: A. Distal cusp. B. Buccal cusp. C. Lingual cusp. Correct Answer: A 15.The occlusal surface of the maxillary second molar is: A. Rectangular in shape. B. Triangular in shape. C. Round in shape. Correct Answer: A 16.The buccal and lingual developmental grooves of the maxillary second molar meet the central developmental groove at: A. Right angles. B. Oblique angles. C. Acute angles. Correct Answer: A 17.The occlusal surface of the maxillary second molar is divided into four parts by the developmental grooves. These parts are: A. Nearly equal in size. B. Unequal in size. C. Not divided into four parts. Correct Answer: A 18.The occlusal surface of the maxillary second molar is not smooth, but is roughened by: A. Supplemental grooves. B. Cusp ridges. C. Developmental grooves. Correct Answer: A 19.Many teeth show considerable prominence cervically on the: A. Mesiobuccal lobe. B. Distobuccal lobe. C. Lingual lobe. Correct Answer: A 20.The cusp ridge of the distobuccal cusp lies: A. Buccal to the cusp ridge of the mesiobuccal cusp. B. Lingual to the cusp ridge of the mesiobuccal cusp. C. The same as the cusp ridge of the mesiobuccal cusp. Correct Answer: A

1. Which tooth has four well-developed cusps? a) Second molar b) First molar c) Second premolar d) First premolar Answer: a) Second molar 2. How many roots does the tooth described have? a) One b) Two c) Three d) Four Answer: b) Two 3. Which tooth is smaller than the first molar in all dimensions? a) Second molar b) First molar c) Second premolar d) First premolar Answer: a) Second molar 4. Which cusp is larger than the distobuccal cusp in the tooth described? a) Mesiobuccal cusp b) Distobuccal cusp c) Lingual cusp d) None of the above Answer: a) Mesiobuccal cusp 5. How many developmental grooves are present on the buccal aspect of the tooth described? a) One b) Two c) Three d) Four Answer: a) One 6. Which tooth has the cervical line that often points sharply to the root bifurcation? a) Second molar b) First molar c) Second premolar d) First premolar Answer: a) Second molar 7. Are the roots of the tooth described as widely separated as those of the first molar? a) Yes b) No Answer: b) No 8. How does the crown of the tooth described compare to that of the first molar? a) It is shorter cervico-occlusally and narrower mesio-distally. b) It is longer cervico-occlusally and wider mesio-distally. c) It is the same size in all dimensions. d) It is larger in some dimensions and smaller in others. Answer: a) It is shorter cervico-occlusally and narrower mesio-distally. 9. Are the roots of the tooth described parallel to each other? a) Yes b) No Answer: a) Yes 10. Do the roots of the tooth described form an acute angle with the occlusal plane? a) Yes b) No Answer: a) Yes

🦷 Dental anatomy lec 14 🦷

31. What is the shape of the occlusal outline? a) Circular b) Rectangular c) Triangular d) Oval Answer: b) Rectangular 32. How does the bucco-lingual measurement compare on the mesial and distal sides? a) Equal b) Greater on the mesial side c) Greater on the distal side d) Irregular Answer: b) Greater on the mesial side 33. How many cusps are present? a) Three b) Four c) Five d) Six Answer: c) Five 34. Where is the distal contact area located? a) Mesiobuccal cusp b) Mesial triangular fossa c) Central groove d) Distal cusp Answer: d) Distal cusp 35. How many fossae are present on the occlusal surface? a) One major and one minor b) One major and two minor c) Two major and one minor d) Two major and two minor Answer: b) One major and two minor 36. Which fossa is centrally placed on the occlusal surface? a) Central fossa b) Mesial triangular fossa c) Distal triangular fossa d) Buccal fossa Answer: a) Central fossa 37. How many developmental grooves are there? a) Two b) Three c) Four d) Five Answer: c) Four 38. Which developmental groove separates the distobuccal and distal cusps? a) Central developmental groove b) Mesiobuccal developmental groove c) Distobuccal developmental groove d) Lingual developmental groove Answer: c) Distobuccal developmental groove

16. What is the shape of the crown on the mesial aspect? a) Rhomboidal b) Convex c) Concave d) Rounded Answer: a) Rhomboidal 17. Where is the buccal cervical ridge located? a) At the cervical line b) Near the lingual cusp c) At the buccal cusp tip d) In the middle third Answer: c) At the buccal cusp tip 18. Where is the crest of curvature located on the lingual outline? a) Near the cervical line b) In the middle third c) Near the buccal cusp d) At the lingual tilt Answer: b) In the middle third 19. How is the lingual cusp compared to the buccal cusp? a) Flat b) Sharp with greater cusp height c) Convex d) Irregular Answer: b) Sharp with greater cusp height 20. Where is the mesial marginal ridge located relative to the cusps tips? a) Above the cusps tips b) At the level of the cusps tips c) 1 mm below the level of the cusps tips d) Below the cusps tips Answer: c) 1 mm below the level of the cusps tips 21. What is the shape of the crown on the distal aspect? a) Rhomboidal b) Concave c) Longer distally than mesially d) Shorter distally than mesially Answer: d) Shorter distally than mesially 22. Where is the distal cusp located bucco-lingually? a) In the center b) Near the lingual margin c) Near the cervical line d) Buccal to the center Answer: d) Buccal to the center 23. How does the distal marginal ridge curve cervically? a) It forms a straight line b) It forms an obtuse angle c) It forms a concavity d) It curves lingually Answer: b) It forms an obtuse angle 24. How is the cervical line on the distal aspect? a) Regular b) Irregular c) Higher buccally than lingually d) Irrelevant information Answer: b) Irregular 25. How does the distal root compare to the mesial root bucco-lingually? a) It is narrower b) It is wider c) They are the same width d) Irrelevant information Answer: a) It is narrower 26. What is the shape of the crown on the mesial aspect? a) Square b) Oval c) Rhomboidal d) Triangular Answer: c) Rhomboidal 27. What is the shape of the buccal outline of the crown on the mesial aspect? a) Concave b) Convex c) Straight d) Irregular Answer: b) Convex 28. Where is the crest of curvature located on the lingual outline? a) Near the cervical line b) In the middle third c) Near the buccal cusp d) At the lingual tilt Answer: b) In the middle third 29. How does the lingual cusp compare to the buccal cusp? a) Flat b) Sharp with greater cusp height c) Convex d) Irregular Answer: b) Sharp with greater cusp height 30. What is the position of the mesial marginal ridge relative to the cusps tips? a) Above the cusps tips b) At the level of the cusps tips c) 1 mm below the level of the cusps tips d) Below the cusps tips Answer: c) 1 mm below the level of the cusps tips

1. Which type of tooth has five cusps? a) Mandibular first molar b) Maxillary first molar c) Mandibular second molar d) Maxillary second molar Answer: b) Maxillary first molar 2. How many buccal developmental grooves are present on the tooth? a) One b) Two c) Three d) Four Answer: b) Two 3. The occlusal surface of the tooth is shaped like: a) Triangle b) Circle c) Oval d) Rectangle Answer: d) Rectangle 4. How many well-developed roots are present in the tooth? a) One b) Two c) Three d) Four Answer: b) Two 5. The mesial contact area is located at the junction between which two-thirds of the tooth? a) Occlusal and middle b) Middle and cervical c) Cervical and apical d) Apical and occlusal Answer: a) Occlusal and middle 6. Which developmental groove separates the mesiobuccal cusp and distobuccal cusp? a) Mesiolingual developmental groove b) Distolingual developmental groove c) Mesiobuccal developmental groove d) Distobuccal developmental groove Answer: c) Mesiobuccal developmental groove 7. The distal cusp is rounded. (True/False) Answer: True 8. The lingual developmental groove acts as a line of division between which two cusps? a) Mesiolingual and distolingual b) Mesiobuccal and distolingual c) Mesiobuccal and mesiolingual d) Distolingual and distobuccal Answer: a) Mesiolingual and distolingual 9. The width of the mesiobuccal cusp is slightly wider than the distobuccal cusp. (True/False) Answer: True 10. The crown of the tooth is wider mesio-distally than bucco-lingually. (True/False) Answer: True 11. How many cusps contribute to 80% of the mesiodistal width of the crown? a) Mesiobuccal and distobuccal b) Mesiobuccal, distobuccal, and distal c) Mesiobuccal, distobuccal, and mesiolingual d) Mesiobuccal, distobuccal, mesiolingual, and distolingual Answer: b) Mesiobuccal, distobuccal, and distal 12. The cervical line curves regularly apically. (True/False) Answer: True 13. The bifurcation area is located approximately how far below the cervical line? a) 1mm b) 2mm c) 3mm d) 4mm Answer: c) 3mm 14. Which cusps form an obtuse angle at their tips when viewed from the lingual aspect? a) Mesiolingual and distolingual b) Mesiolingual and mesiobuccal c) Mesiolingual and distobuccal d) Distolingual and distobuccal Answer: a) Mesiolingual and distolingual 15. Which cusp has the highest cusp tip when viewed from the lingual aspect? a) Mesiolingual b) Mesiobuccal c) Distolingual d) Distobuccal Answer: a) Mesiolingual

🦷 Dental anatomy lec 13 🦷