NBDE 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| 1. Primary tooth that has the most distinct prominent facial cervical ridge | Mandibular 1st molar
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| 2. Lingual cusp of the Maxillary first premolars is off set to the mesial than the second? | Yes
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| 3. Primary second molar generally exhibit what cusp? | Cusp of carabelli
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| 4. Mamelons that remain beyond the age of 10 generally indicate what type of bite? | Open bite
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| 5. Mand central incisors and Max third molars generally occlude w/ how many apposing teeth? | One
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| 6. What developmental groove between the df cusp and dl cusp of mand 1st molar? | Distofacial groove
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| 7. The roots of the maxillary second molar tent to be ___ ____ and have ____ _____ inclinations. | less divergent; greater distal
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| 8. What teeth has a primary function of biting? | Incisors and canines
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| 9. The tooth with the longest root. | Maxillary canine
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| 10. What is the groove pattern for the mandibular first molar? | Y or Dryopethicus pattern
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| 11. What is the groove patter for the mandibular second molar? | Cross (+) pattern
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| 12. When compared to a maxillary canine the mandibular canine has contact areas located more ______. | Incisally
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| 13. The mandibular 1st premolar, the mesial marginal ridge is located more _____ than the distal marginal ridge. | Cervically
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| 14. The oblique ridge of the maxillary molar forms the ______ _______ of the central fossa. | distal boundary
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| 15. The transverse ridge results from what two union? | facial and lingual triangular ridges
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| 16. For multirooted teeth dentin continues to form MOST rapidly at the ______ and ______ triangular ridges | facial; lingual
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| 17. What anterior teeth are wider mesio-distally than facio-lingually? | Maxillary incisors
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| 18. What posterior teeth are wider mesio-distally than facio-lingually? | Mandibular molars
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| 19. Mandibular 1st molars usually have _____ roots and ______ canals? | two; three
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| 20 How many mesial canals are in mandibular 1st molars | two mesial canals
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| 21. What primary tooth generally has an oblique ridge? | Primary maxillary 2nd molar
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| 22. The mesiolingual cusp of the maxillary molars occlude in the ______ _______ of the mandibular molar. | central fossa
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| 23. The distobuccal cusp of the mandibular molars occlude in the ____ _____ of the maxillary molar. | central fossa
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| 24. The primary second molar exhibit more/less cusps than the primary first molar. | more
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| 25. The occlusal outline of a mandibular first molar is what shape? | Pentagon
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| 26. What is the greatest influence for the lingual concavity of the maxillary anterior teeth? | By the side shift of the mandible
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| 27. The side shift of the mandible is also known as the ________ ________. | Bennett movement
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| 28. The contact between a max central and lateral incisor makes the lingual embrasure ______ than the facial embrasure. | larger
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| 29. What non-molar tooth most frequently has a mesial and distal pulp horn? | Max central incisor
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| 30. The cervical ridge is the most prominent for ______ maxillary teeth on the MF surface of the 1st molar. | primary
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| 31. What is the movement of the non-working condyle? | down, forward, and medially
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| 32. What non-molar tooth most frequently exhibits three roots? | maxillary 1st premolar
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| 33. Where is the dentin most highly mineralized? | intra or peritubular dentin
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| 34. The primary spacing for the anterior teeth is most frequently caused by growth of the _____ _______. | dental arches
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| 35. What tooth is the only tooth that has the potential of contacting both anterior and posterior teeth? | Max canine
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| 36. The mesiofacial and distolingual angle form the occlusal outline tend to be ______ angles. | acute
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| 37. this mesiolingual and distofacial angles form the occlusal outline tend to be ______ angles. | obtuse
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| 38. The ______ corners coincide w/ the direction of the oblique ridge. | obtuse
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| 39. The occlusal outline from an occlusal view of the maxillary first molar is _______. | rhomboidal
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| 40. How many teeth in the permanent dentition normally have cingulums? | 12 (max & mand anteriors)
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| 41. What anterior tooth most frequently exhibit a bifurcated root? | mandibular canine
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| 42. The bifurcation for the mandibular canine roots when present creates a ______ and ______ root. | facial; lingual
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| 43. The cross section of the mandibular canine at the CEJ is _____ but wider _______ at the labial. | ovoid; mesiodistally
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| 44. The non-molar that is least likely to have a bifurcated root is what? | maxillary central incisor
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| 45. The size and position of the cusps are more identical for the maxillary 1st or 2nd premolar? | maxillary 2nd premolar
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| 46. What tooth has the most pronounced developmental marginal groove of any of the max teeth? | max 1st premolar
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| 47. The Y type mandibular premolar has ____ facial and ____ lingual cusps. | one; two
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| 48. What central incisor is the most bilaterally symmetrical tooth? | primary and permanent mandibular central incisor
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| 49. The maxillary _______ ________ generally have the most prominent marginal ridges of all anterior teeth. | lateral incisors
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| 50. Maxillary ______ _________ have the most distinct and deepest lingual fossa's of all anterior teeth. | lateral incisors
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| 51. Which posterior tooth has the greatest cervico-occlusal crown height? | Maxillary 1st premolar
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| 52. What cusps does the oblique ridge connect? | mesiolingual and distofacial cusps.
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| 53. The occlusal outline for the mandibular 1st premolar occlusal view is ______ shaped. | diamond
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| 54. The last primary teeth to erupt in the maxillary is what? | second molars
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| 55. The softest dental tissue is _____. | cementum
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| 56. The hardest dental tissue is _____. | enamel
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| 57. T/F All premolars are wider faciolingually than mesiodistally. | True
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| 58. T/F Maxillary 2nd premolars has 2 cusps that are equal in height. | True
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| 59. What are the boarders of the TMJ? | space between the disc, articular fossa, and eminence.
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| 60. Where is the 4th pulp canal in the maxillary first molar is located where? | mesiofacial canal
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| 61. What is the shape of the crown of canines from a facial view? | pentagonal
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| 62. The proximal contacts of the mandibular central incisors are located where? | approximately at the same level as the mesial and distal incisal thirds.
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| 63. On the maxillary 1st premolar, what concavity makes it difficult to adapt a matrix band around? | mesial concavity.
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| 64. Viewed from the occlusal the arrangement of the teeth are ______ shaped. | parabolic
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| 65. Viewed from he occlusal the 4 posterior teeth in the mandibular arch are aligned in a _____ ________. | straight line
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| 66. ________ ____ molar is the only primary posterior tooth to have oblique & transverse ridges & DL grooves. | Primary 2nd molar
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| 67. The thickest section of the articular disc when seen in the sagittal plane is the _________ _____________. | posterior border
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| 68. Except for third molars the ____________ _________ _________ exhibit the most deviation in the crown morphology. | maxillary lateral incisor
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| 69. What fibers of the periodontal ligament provide the major support for a tooth during function? | oblique fibers
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| 70. The largest root of the maxillary molar is the ________ ________. | palatal root.
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| 71. The smallest root of the maxillary molar is the ___________ ___________. | distofacial root
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| 72. The pulp chamber of a mature tooth contains _______ ______ and _______. | blood vessels; nerves
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| 73. The mandibular primary primate space is located between _______ and _______. | canie; first molar
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| 74. The occlusal table of a posterior tooth makes up _______ of the total facio-lingual dimension. | 55-65%
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| 75. In a healthy mouth the alveolar process is ______ around the facial of the mandibular central incisors. | thinnest
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| 76. The crown of the mandibular second molar inclines to the ______ and ______. | mesial; lingual
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| 77. T/F the epithelial attachment is always an actual part of a tooth's periodontium. | True
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| 78. Continued eruption of a tooth through the surrounding tissue makes the clinical crown appear _____. | longer
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| 79. The _____ ____ primary molar has a crown that somewhat resembles a permanent molar. | maxillary first
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| 80. The _____ _____ primary molar has a root that resembles a typical permanent molar. | maxillary first
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| 81. ______ guidance plays the greatest role in disoccluding the posterior teeth in latero-protrusive movements. | anterior guidance.
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| 82. Viewed form the occlusal the basic coronal outline of a mandibular second premolar is _____. | pentagonal
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| 83. Ligaments associated with the TMJ serve to ______ surrounding and ________ tissues from damage. | protect; supporting
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| 84. Facial view of a primary mandibular 1st molar, the CEJ is most ______ positioned towards the ______ _______. | apically; mesial 1/3
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| 85. The ______ ___ _______ has the greatest M-D diameter of all the molars. | mandibular 1st molar
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| 86. Other than 3rd molars the tooth that is most often congenitally missing what teeth? | maxillary lateral incisors
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| 87. The M-D width of the mandibular lateral incisor is ______ than the mandibular central incisor. | wider
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| 88. The M-D width of the maxillary lateral incisor is _____ than the maxillary central incisor. | narrower
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| 89. The key feature that differentiates the mandibular 1st & 2nd molar is the number of _______ ________ and _______ _______. | developmental grooves; number of cusps
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| 90. The incisal embrasure between the maxillary centrals is _____ than between the central and the lateral. | smaller
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| 91. The premolar that has a longer mesio-facial cusp ridge than the disto-facial cusp ridge is the ______ _____. | maxillary 1st premolar
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| 92. The facial cusp of the maxillary 1st premolar is offset to the _____. | distal
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| 93. A common trait of the maxillary premolar is that their lingual cusp are offset to the ____. | mesial
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| 94. For molar teeth the root canals join the pulp chamber _____ to the CEJ. | apical
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| 95. The _____ periodontal fibers travel from one root to the adjacent root surface. | transseptal
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| 96. In the rare event of a second canal of a mandibular 1st premolar it is most likely located to the _______. | lingual
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| 97. The mesiolingual developmental groove on tooth #21 originates from the ______ ____. | occlusal pit
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| 98. The mesiolingual developmental groove on #21 extends onto the _____ _____. | proximal surface
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| 99. The physiologic rest position is established when? | the mastication muscles are in the tonic equilibrium
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| 100. The overjet and overbite provide some degree of _____ for lips, cheek and tongue. | protection
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| 101. The ____ _______ of an anterior tooth is the first to calcify. | incisal ridge
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| 102. A crown of the maxillary first molar has a _____ _______ groove than the second molar. | shorter distolingual
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| 103. The principle muscles that retrude the mandible are the ______ _____ of the temporalis. | posterior fibers
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| 104. ________ is an excess of calcified tissue formation of the root apex. | hypercementosis
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| 105. At the mid root cross section of first molars the largest is the ____ of the mandibular. | mesial
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| 106. The premolar with the steepest cusp inclines is what tooth? | maxillary 1st premolar
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| 107. The primary mandibular 1st molar usually exhibit a distal _____ _____. | triangular fossa
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| 108. The maxillary lateral incisor is usually equal to or larger than the maxillary central in ______ length. | root
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| 109. The distoincisal angle of the maxillary lateral has the greatest ______ of all maxillary anterior teeth. | convexity
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| 110. The geometric form of anterior teeth when viewed from the proximal is _____. | triangular
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| 111. The ________ cusp of maxillary is the only one that is not part of the molar cusp triangle. | distolingual
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| 112. The mandibular central incisors have contact points at the same ______ level. | incisocervical
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| 113. Mandibular molar have long axis of their root apices _____ and their crowns _____. | facial; lingual
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| 114. Caries stimulate the production of ______ dentin. | secondary
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| 115. The largest cusp of the mandibular first molar is the _____. | mesio-facial
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| 116. In cervical cross section the root of the mandibular canine is flattened in a ________ direction. | mesio-distal
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| 117. The primary central incisor exhibit a cervical ridge where? | both facial and lingual surfaces.
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| 118. What type of connective tissue is the periodontal ligament fibers made of? | Collagen
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| 119. The mandibular 1st premolar as a uniquely prominent _____ ridge. | triangular
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| 120. The mandibular 1st premolar has frequently both a _____ and _____ pit. | mesial; distal
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| 121. The temporomandibular ligament _____ the extant of jaw opening. | limit
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| 122. The temporomandibular ligament _____ translation of the condyle down the articular eminence. | initiates
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| 123. The tooth that is most likely forced into the maxillary sinus during an extraction is the ____ _____. | first molar
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| 124. The ______ muscle is an extrinsic muscle of the tongue that causes it to retract. | styloglossus
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| 125. Facial view, the apex of the lingual root is in line with the _____ groove of the tooth. | facial
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| 126. The premolar that is likely to have a crescent-shaped central developmental groove is _______ _______. | Mandibular 2nd
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| 127. The maxillary 3rd molar is the molar that most frequently have __ cusps. | 3
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| 128. Mesolingual groove is an identifying characteristic for the ______ ____ premolar. | mandibular 1st
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| 129. ______ movement occurs during the earliest stage of lateral movement. | Bennett movement
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| 130. The ______ ______ muscles are primarily responsible for protrusive movement. | lateral pterygoid
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| 131. The lingual cusp of the mandibular first premolar is approximately ____ the height of the facial cusp. | 2/3rd
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| 132. The first succedaneous tooth to erupt in the mouth is what tooth. | permanent mandibular central incisor
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| 133. The Y type mandibular 2nd premolar has the same number of _____ ____ as the mandibular 1 molar. | occlusal pits
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| 134. From the facial or lingual views, canines have a _____ outline. | pentagonal
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| 135. The maxillary 1st molar has a ______ concavity that can pose special problems in matrix placement. | distal concavity
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| 136. The cervical cross section of the maxillary 1st premolar exhibits a _____ shaped root outline. | kidney
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| 137.The cervical cross section of the maxillary 1st premolar exhibits a _____ shaped pulp chamber floor. | kidney
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| 138. The middle facial lobe of the of the maxillary canine includes the ____ ____. | cusp tip
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| 139. The number of lobes that form the anterior teeth is ____. | 4
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| 140. The number of lobes tht form the posterior teeth coincides with what? | coincides the number of cusps
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| 141. The _____ __ ______ is the anterior-posterior curvature of the occlusal surfaces as seen in a facial view. | curve of spee
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| 142. The _____ periodontal ligament fibers reduces the likelihood of forceful impaction into the alveolus. | oblique
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| 143. The height of contour is the ______ ____ for the facial surfaces of all teeth. | gingival 1/3
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| 144. The apex of the triangular-shaped boundary of the interproximal spaces is the _____ ____ of the teeth. | contact area
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| 145. From a facial view the crown of a primary canine has a mesio-incisal slope ____ than the disto-incisal slope. | longer
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| 146. The cusp tip of the primary canine is generally offset to the _____. | distal
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| 147. A primary molar lacks an identifiable _____ _____. | root trunk
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| 148. The maxillary canine from a proximal view tends to be positioned with the most nearly ____ axis. | vertical
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| 149. ______ is the cemental union of 2 fully formed teeth that were originally separate entities. | concrescence
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| 150. The apex of a tooth is fully formed ____ years after it erupts in the mouth. | 2-3 yrs
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| 151. The ____ _____ _____ muscle is the prime mover in effecting a left working movement. | right lateral pterygoid
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| 152. The mesial surface of a crown of a mandibular canine is almost _____ to the long axis of the tooth. | parallel
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| 153. The smallest cusp of the mandibular 1st molar is what? | distal cusp
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| 154. The cross sectional outline at the cervical is roughly ____ for the permanent maxillary 2nd molar. | triangular
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| 155. The TMJ has how many synovial cavities? | 2
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| 156. The cervical line of permanent teeth has the greatest depth of curvature on the ____ aspect. | mesial
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| 157. From a proximal view, the incisal ridge of the crown is in line with the ____ of the root. | center
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| 158. What primary tooth has the smallest faciolingual crown dimension? | mandibular central incisor
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| 159. The primary mandibular first molar has the most distinct ______ ridge. | transverse
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| 160. The condyle on the working side generally rotates about the _______ ______ and _______ laterally. | vertical axis; translates
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| 161. Occlusal view, the greatest faciolingual diameter of a mandibular 2nd molar is the ____ _____. | mesial 1/3
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| 162. More of the occlusal surface can be seen from the _____ than the _____ for a mandibular 1st premolar. | mesial; distal
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| 163. The _____ movement is the bodily shift of the mandible towards the working condyle. | Bennett
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| 164. The DL groove of a maxillary lateral incisor is an anatomical feature that complicates ____ _____ | root planning.
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| 165. _____ are a result of normal enamel apposition. | perikymata
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| 166. _____ periodontal ligament fibers are most likely to be found in the middle 1/3 of the root. | oblique
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| 167. The mandibular centrals and laterals most frequently have _____ areas on the M & D root surfaces. | concave
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| 168. The mandibular canine has a _____ prominent cingulum than the maxillary canine. | less
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| 169. The mandibular canine has a ______ ______ facial surface from incisal to apical end. | continuous convex
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| 170. Accessory pulp canals may be found in the ____ ____ of the root. | cervical 1/3
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| 171. Accessory pulp canals may contain ____ and ____ tissue. | nervous; vascular
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| 172. Accessory pulp canals may be found in _____ area of molars. | furcation
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| 173. Accessory pulp canals allow the pulp tissue to _____ with the periodontal ligament space. | communicate
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| 174. The TMJ is protected by what? | synovial fluid, fibrocartilage, ligament suspension, and masticatory muscles
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| 175. The most prone facial and lingual surfaces of molars are the _____ of ______ and the ______ of _____ | lingual of maxillary; facial of mandibular
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| 176. The function of the pulp? | form & supply nutrients to dentin and transmit sensory stimuli
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| 177. In delayed resorption of primary incisors the permanent incisors usually erupt _____. | lingually
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| 178. The disk of the TMJ is moved forward principally by the ____ _____ muscle. | lateral pterygoid
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| 179. Primary molars differs from permanent molars in that their roots are more _____. | dvergent
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| 180. The primary teeth that differ most from permanent teeth are the ____ _____. | first molars
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| 181. The highest and sharpest cusp on a primary mandibular first molar is the _____ cusp. | mesiolingual
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| 182. The maxillary central has the greatest _____ axial inclination. | facio-lingual
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| 183. The primary function of the dental pulp is to form _____. | dentin
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| 184. The shortest interdental papilla is between the ______ ______ ______and ______ _______. | mandibular second premolar; first molar
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| 185. In cross section the root of the mandibular canine is regularly ____. | oval
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| 186. The percentage of dentin that is organic is ____. | 20-30%
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| 187. The anterior tooth that is most likely demonstrate a lingual pit cavity is ______ _____ _______. | maxillary lateral incisor.
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| 188. Calcification of the primary root is normally completed at _____ of age. | 3-4 yrs
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| 189. _______ fibers are not periodontal fibers. | interradicular
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| 190. Approximately ____ of permanent root formation is completed at the time the tooth erupts. | 50%
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| 191. The ______ ______ ______ has the greatest faciolingual diameter of the crown for all teeth. | maxillary first molar
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| 192. Tooth contact almost exclusively determines ______ position. | intercuspal
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| 193. _______ ______ position is a muscle guide position. | physiological rest
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| 194. ______ ______ is a ligament guided position. | centric relation
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| 195. Centric occlusion = ________ = _________. | CO; intercuspal position
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| 196. The ideal position and height of lingual cuss of Mand 1st molar accommodates _____ ______. | working movement.
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| 197. What tooth has the longest root. | maxillary canine
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| 198. The premolar that most frequently has a single central pit is the ____ ____. | mandibular second.
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| 199. What does developmental grooves separate? | separates cusp ridges from marginal ridges
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| 200. The _______ _______ ______ most often is in abnormal relation and contact with adjacent teeth. | maxillary lateral incisor
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| 201. The lingual cusp of a mand 1st premolar is similar in development to the cingulum of a _____. | canine
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| 202. Teeth are in contact in intercuspal position during ____ masticatory swallowing. | NON
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| 203. Contraction of the lateral pterygoid produces what type of movement to the condyle? | forward movement of the condyle from the articular fossa
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| 204. The maxillary 1st molar has a wider m-d width(taper) towards the ____ than towards the _____. | facial; lingual
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| 205. Physiological rest position is also known as what? | postural position
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| 206. The primary maxillary 1st molar most often bears the greatest resemblance to a ____. | premolar
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| 207. In Posselt's envelope of motion _____ ____ position is the most superior point. | maximum intercuspal
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| 208. The molar that has the most distinct transverse ridge separating the mesial fossa is the ____ _____ | mandibular 1st
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| 209. The ____ _____ is a depression in the temporal bone, just anterior to the auditory canal. | glenoid fossa
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| 210. The center of the oblique ridge on a maxillary 1st molar is at the same level as what? | the marginal ridge
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| 210. _____ is a developmental abnormality characterized by the presence of fewer teeth than usual. | oligodontia
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| 211. Tooth # ___ & ____ are the non molar teeth having the sharpest demarcation between pulp chamber & canal. | 5; 12
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| 212. Dense ____ ___ ____ tissue covers the articulating osseous structures of the tmj. | avascular fibrous connective
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| 213. The mandibular first premolar is the only premolar that frequently has ____ pulp horn. | one
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| 214. The facial surfaces of mandibular molars are located ____ to the border of the ascending ramus. | medial
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| 215. The facial masticatory mucosa (attached gingiva) is narrowest where? | mandibular first premolar
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| 216. The DEJ occurs at the junction of where? | dental papilla & inner enamel pithelium
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| 217. Of the 3 furcations of maxillary 1st molar the ____ is the closest to the cervical line. | mesial
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| 218. Of the 3 furcations of a maxillary 1st molar the ____ is the furthest form the cervical line. | distal
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| 219. The ____ _____ muscle is NOT an elevator of the mandible. | lateral pterygoid
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| 220. Maintenance of the epithelial attachment (IS/IS NOT) a function of the periodontal ligament. | IS NOT
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| 221. Periodontal ligament fibers are made up of what? | collagen
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| 222. Periodontal ligament fibers support the tooth connecting to the dental alveolar bone via the _____. | cementum
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| 223. Does the primary first mandibular molar look like any permanent tooth? | NO
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| 224. What tooth have the greatest morphological variation and what is second to that? | 3rd molars, maxillary laterals are second.
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| 225. Maxillary 3rd molars from an occlusal view look like a heart shape because they are missing what? | distolingual cusp
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| 226. Mandibular centrals distinguished by the ____ ____, which is greater on the ____ than _____. | cervical curvature; mesial; distal
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| 227. Marginal ridge height for posterior teeth are generally ____ occlusal than the _____. | more; distal
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| 228. Mandibular first premolar has its mesial marginal ridge compared to the distal. | cervical
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| 229. Supernumerary teeth when seen in the maxillary are usually found where? | between centrals or as 4th molars
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| 230. The main component of enamel is what? | inorganic matter (NOT collagen)
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| 231. The direction of primary enamel rods in the cervical third is in what direction. | occlusal direction.
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| 232. The direction of enamel rods in the permanent teeth in the cervical third is in what direction. | gingival direction
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| 233. The lower compartment of the tmj is located where? | between the condyle and the disc
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| 234. Primary teeth appear more worn compared to permanent teeth because of what reason? | less mineralized
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| 235. What is the usual overjet? | 2-4 mm
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| 236. Difference in space from primary to the permanent dentition. | 2-4 mm
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| 237. All teeth have ____ and _____ marginal ridges. | distal; mesial
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| 238. Does the lingual cusp of the mandibular 1 premolar in normal occlusion occlude? | No
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| 239. Physiological rest position occurs when? | when the muscles of mastication are in a tonic equilibrium
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| 240. What is the movement of the condyle when the mandible moves from CO to edge to edge? | down and forward
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| 241. What has the greatest m-d crown dimention of any anterior teeth? | maxillary centrals
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| 242. T/F Max central does not have nearly identical M-D vs. I-C length. | F
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| 243. What has the greatest cervical curvature (mesial) of any other tooth? | Max central
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| 244. What teeth has the smallest m-d width of any maxillary teeth? | max lateral
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| 245. What has the most crown shape variation? | max lateral
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| 246. Of all anterior teeth, what has nearly identical m-d & facio-lingual measurement? | max lateral
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| 247. Of the incisors, what tooth has a distal contact that is farthest cervically? | max lateral
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| 248. What has the smallest crown dimensions of any tooth? | mand centrals
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| 249. What has the most symmetrical crown? | mand centrals
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| 250. What teeth has proximal contacts at the same level? | mand centrals
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| 251. Crown twisted on root. | mand lateral
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| 252. Greatest overall tooth length | max canine
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| 253. What canine has a distal bulge? | max canine
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| 254. Greatest f-l crown dimension of any anterior tooth | max canine
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| 255. Tooth with cusp tip located facial to lingual axis | max canine
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| 256. Greatest cervical prominence of any anterior tooth | max canine
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| 257. Max canine has distal contact where? | centered
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| 258. What has the straightest mesial alignment of crown to root? | mand canine
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| 259. Mand canine makes a ____ shape from crown tip to root apex | C shape
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| 260. Mad canine has incisal edge ____ to long axis | lingual
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| 261. Longest root of any mandibular teeth | mandibular canine
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| 262. Max 1st premolar only premolar with longer _____ _____ cusp ridge. | mesial cusp
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| 263. Max 1st premolar only tooth with _____ _____ ridge groove and _____ ____ concavity and _____ root depression. | mesial marginal; mesial crown; mesial
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| 264. ____ ____ premolar most symmetrical posterior tooth | max 2nd
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| 265. What tooth has the shortest root of any mandibular tooth? | mand 3rd
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| 266. What tooth has the greatest distal root inclination of any other tooth? | mand 3rd
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| 267. Cruxiform occlusal pattern | mand 2nd molar
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| 268. Molar mesial root has the greatest f-l dimension of any other root | mand 1st
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| 269. Only premolar with a central fossa | mand 2nd
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| 270. Molar has the greatest root separation of any other tooth | mand 1st
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| 271. Only premolar with lingual groove | mand 2nd
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| 272. Molar with the longest root of any other molar | mand 1s
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| 273. Only premolar with multiple lingual cusps | mand 2nd
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| 274. molar has three facial cusps | mand 1st
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| 275. Premolar has mesial marginal ridge that is more cervical than distal marginal ridge | mand 1st
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| 276. Largest O-C crown dimension of any mand molar | mand 1st
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| 277. Only premolar with a m-l groove | mand 1st
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| 278. Largest f-l crown dimension of any other mand tooth | mand 1st
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| 279. premolar with most variation of all posterior teeth in facial vs lingual cusp height | mand 1st
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| 280. Closest in size f-l vs m-d of any max posterior tooth | max 1st molar
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| 281. Smallest f-l of any posterior tooth | mand 1st premolar
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|
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