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Dental Facts

NBDE 1

QuestionAnswer
1. Primary tooth that has the most distinct prominent facial cervical ridge Mandibular 1st molar
2. Lingual cusp of the Maxillary first premolars is off set to the mesial than the second? Yes
3. Primary second molar generally exhibit what cusp? Cusp of carabelli
4. Mamelons that remain beyond the age of 10 generally indicate what type of bite? Open bite
5. Mand central incisors and Max third molars generally occlude w/ how many apposing teeth? One
6. What developmental groove between the df cusp and dl cusp of mand 1st molar? Distofacial groove
7. The roots of the maxillary second molar tent to be ___ ____ and have ____ _____ inclinations. less divergent; greater distal
8. What teeth has a primary function of biting? Incisors and canines
9. The tooth with the longest root. Maxillary canine
10. What is the groove pattern for the mandibular first molar? Y or Dryopethicus pattern
11. What is the groove patter for the mandibular second molar? Cross (+) pattern
12. When compared to a maxillary canine the mandibular canine has contact areas located more ______. Incisally
13. The mandibular 1st premolar, the mesial marginal ridge is located more _____ than the distal marginal ridge. Cervically
14. The oblique ridge of the maxillary molar forms the ______ _______ of the central fossa. distal boundary
15. The transverse ridge results from what two union? facial and lingual triangular ridges
16. For multirooted teeth dentin continues to form MOST rapidly at the ______ and ______ triangular ridges facial; lingual
17. What anterior teeth are wider mesio-distally than facio-lingually? Maxillary incisors
18. What posterior teeth are wider mesio-distally than facio-lingually? Mandibular molars
19. Mandibular 1st molars usually have _____ roots and ______ canals? two; three
20 How many mesial canals are in mandibular 1st molars two mesial canals
21. What primary tooth generally has an oblique ridge? Primary maxillary 2nd molar
22. The mesiolingual cusp of the maxillary molars occlude in the ______ _______ of the mandibular molar. central fossa
23. The distobuccal cusp of the mandibular molars occlude in the ____ _____ of the maxillary molar. central fossa
24. The primary second molar exhibit more/less cusps than the primary first molar. more
25. The occlusal outline of a mandibular first molar is what shape? Pentagon
26. What is the greatest influence for the lingual concavity of the maxillary anterior teeth? By the side shift of the mandible
27. The side shift of the mandible is also known as the ________ ________. Bennett movement
28. The contact between a max central and lateral incisor makes the lingual embrasure ______ than the facial embrasure. larger
29. What non-molar tooth most frequently has a mesial and distal pulp horn? Max central incisor
30. The cervical ridge is the most prominent for ______ maxillary teeth on the MF surface of the 1st molar. primary
31. What is the movement of the non-working condyle? down, forward, and medially
32. What non-molar tooth most frequently exhibits three roots? maxillary 1st premolar
33. Where is the dentin most highly mineralized? intra or peritubular dentin
34. The primary spacing for the anterior teeth is most frequently caused by growth of the _____ _______. dental arches
35. What tooth is the only tooth that has the potential of contacting both anterior and posterior teeth? Max canine
36. The mesiofacial and distolingual angle form the occlusal outline tend to be ______ angles. acute
37. this mesiolingual and distofacial angles form the occlusal outline tend to be ______ angles. obtuse
38. The ______ corners coincide w/ the direction of the oblique ridge. obtuse
39. The occlusal outline from an occlusal view of the maxillary first molar is _______. rhomboidal
40. How many teeth in the permanent dentition normally have cingulums? 12 (max & mand anteriors)
41. What anterior tooth most frequently exhibit a bifurcated root? mandibular canine
42. The bifurcation for the mandibular canine roots when present creates a ______ and ______ root. facial; lingual
43. The cross section of the mandibular canine at the CEJ is _____ but wider _______ at the labial. ovoid; mesiodistally
44. The non-molar that is least likely to have a bifurcated root is what? maxillary central incisor
45. The size and position of the cusps are more identical for the maxillary 1st or 2nd premolar? maxillary 2nd premolar
46. What tooth has the most pronounced developmental marginal groove of any of the max teeth? max 1st premolar
47. The Y type mandibular premolar has ____ facial and ____ lingual cusps. one; two
48. What central incisor is the most bilaterally symmetrical tooth? primary and permanent mandibular central incisor
49. The maxillary _______ ________ generally have the most prominent marginal ridges of all anterior teeth. lateral incisors
50. Maxillary ______ _________ have the most distinct and deepest lingual fossa's of all anterior teeth. lateral incisors
51. Which posterior tooth has the greatest cervico-occlusal crown height? Maxillary 1st premolar
52. What cusps does the oblique ridge connect? mesiolingual and distofacial cusps.
53. The occlusal outline for the mandibular 1st premolar occlusal view is ______ shaped. diamond
54. The last primary teeth to erupt in the maxillary is what? second molars
55. The softest dental tissue is _____. cementum
56. The hardest dental tissue is _____. enamel
57. T/F All premolars are wider faciolingually than mesiodistally. True
58. T/F Maxillary 2nd premolars has 2 cusps that are equal in height. True
59. What are the boarders of the TMJ? space between the disc, articular fossa, and eminence.
60. Where is the 4th pulp canal in the maxillary first molar is located where? mesiofacial canal
61. What is the shape of the crown of canines from a facial view? pentagonal
62. The proximal contacts of the mandibular central incisors are located where? approximately at the same level as the mesial and distal incisal thirds.
63. On the maxillary 1st premolar, what concavity makes it difficult to adapt a matrix band around? mesial concavity.
64. Viewed from the occlusal the arrangement of the teeth are ______ shaped. parabolic
65. Viewed from he occlusal the 4 posterior teeth in the mandibular arch are aligned in a _____ ________. straight line
66. ________ ____ molar is the only primary posterior tooth to have oblique & transverse ridges & DL grooves. Primary 2nd molar
67. The thickest section of the articular disc when seen in the sagittal plane is the _________ _____________. posterior border
68. Except for third molars the ____________ _________ _________ exhibit the most deviation in the crown morphology. maxillary lateral incisor
69. What fibers of the periodontal ligament provide the major support for a tooth during function? oblique fibers
70. The largest root of the maxillary molar is the ________ ________. palatal root.
71. The smallest root of the maxillary molar is the ___________ ___________. distofacial root
72. The pulp chamber of a mature tooth contains _______ ______ and _______. blood vessels; nerves
73. The mandibular primary primate space is located between _______ and _______. canie; first molar
74. The occlusal table of a posterior tooth makes up _______ of the total facio-lingual dimension. 55-65%
75. In a healthy mouth the alveolar process is ______ around the facial of the mandibular central incisors. thinnest
76. The crown of the mandibular second molar inclines to the ______ and ______. mesial; lingual
77. T/F the epithelial attachment is always an actual part of a tooth's periodontium. True
78. Continued eruption of a tooth through the surrounding tissue makes the clinical crown appear _____. longer
79. The _____ ____ primary molar has a crown that somewhat resembles a permanent molar. maxillary first
80. The _____ _____ primary molar has a root that resembles a typical permanent molar. maxillary first
81. ______ guidance plays the greatest role in disoccluding the posterior teeth in latero-protrusive movements. anterior guidance.
82. Viewed form the occlusal the basic coronal outline of a mandibular second premolar is _____. pentagonal
83. Ligaments associated with the TMJ serve to ______ surrounding and ________ tissues from damage. protect; supporting
84. Facial view of a primary mandibular 1st molar, the CEJ is most ______ positioned towards the ______ _______. apically; mesial 1/3
85. The ______ ___ _______ has the greatest M-D diameter of all the molars. mandibular 1st molar
86. Other than 3rd molars the tooth that is most often congenitally missing what teeth? maxillary lateral incisors
87. The M-D width of the mandibular lateral incisor is ______ than the mandibular central incisor. wider
88. The M-D width of the maxillary lateral incisor is _____ than the maxillary central incisor. narrower
89. The key feature that differentiates the mandibular 1st & 2nd molar is the number of _______ ________ and _______ _______. developmental grooves; number of cusps
90. The incisal embrasure between the maxillary centrals is _____ than between the central and the lateral. smaller
91. The premolar that has a longer mesio-facial cusp ridge than the disto-facial cusp ridge is the ______ _____. maxillary 1st premolar
92. The facial cusp of the maxillary 1st premolar is offset to the _____. distal
93. A common trait of the maxillary premolar is that their lingual cusp are offset to the ____. mesial
94. For molar teeth the root canals join the pulp chamber _____ to the CEJ. apical
95. The _____ periodontal fibers travel from one root to the adjacent root surface. transseptal
96. In the rare event of a second canal of a mandibular 1st premolar it is most likely located to the _______. lingual
97. The mesiolingual developmental groove on tooth #21 originates from the ______ ____. occlusal pit
98. The mesiolingual developmental groove on #21 extends onto the _____ _____. proximal surface
99. The physiologic rest position is established when? the mastication muscles are in the tonic equilibrium
100. The overjet and overbite provide some degree of _____ for lips, cheek and tongue. protection
101. The ____ _______ of an anterior tooth is the first to calcify. incisal ridge
102. A crown of the maxillary first molar has a _____ _______ groove than the second molar. shorter distolingual
103. The principle muscles that retrude the mandible are the ______ _____ of the temporalis. posterior fibers
104. ________ is an excess of calcified tissue formation of the root apex. hypercementosis
105. At the mid root cross section of first molars the largest is the ____ of the mandibular. mesial
106. The premolar with the steepest cusp inclines is what tooth? maxillary 1st premolar
107. The primary mandibular 1st molar usually exhibit a distal _____ _____. triangular fossa
108. The maxillary lateral incisor is usually equal to or larger than the maxillary central in ______ length. root
109. The distoincisal angle of the maxillary lateral has the greatest ______ of all maxillary anterior teeth. convexity
110. The geometric form of anterior teeth when viewed from the proximal is _____. triangular
111. The ________ cusp of maxillary is the only one that is not part of the molar cusp triangle. distolingual
112. The mandibular central incisors have contact points at the same ______ level. incisocervical
113. Mandibular molar have long axis of their root apices _____ and their crowns _____. facial; lingual
114. Caries stimulate the production of ______ dentin. secondary
115. The largest cusp of the mandibular first molar is the _____. mesio-facial
116. In cervical cross section the root of the mandibular canine is flattened in a ________ direction. mesio-distal
117. The primary central incisor exhibit a cervical ridge where? both facial and lingual surfaces.
118. What type of connective tissue is the periodontal ligament fibers made of? Collagen
119. The mandibular 1st premolar as a uniquely prominent _____ ridge. triangular
120. The mandibular 1st premolar has frequently both a _____ and _____ pit. mesial; distal
121. The temporomandibular ligament _____ the extant of jaw opening. limit
122. The temporomandibular ligament _____ translation of the condyle down the articular eminence. initiates
123. The tooth that is most likely forced into the maxillary sinus during an extraction is the ____ _____. first molar
124. The ______ muscle is an extrinsic muscle of the tongue that causes it to retract. styloglossus
125. Facial view, the apex of the lingual root is in line with the _____ groove of the tooth. facial
126. The premolar that is likely to have a crescent-shaped central developmental groove is _______ _______. Mandibular 2nd
127. The maxillary 3rd molar is the molar that most frequently have __ cusps. 3
128. Mesolingual groove is an identifying characteristic for the ______ ____ premolar. mandibular 1st
129. ______ movement occurs during the earliest stage of lateral movement. Bennett movement
130. The ______ ______ muscles are primarily responsible for protrusive movement. lateral pterygoid
131. The lingual cusp of the mandibular first premolar is approximately ____ the height of the facial cusp. 2/3rd
132. The first succedaneous tooth to erupt in the mouth is what tooth. permanent mandibular central incisor
133. The Y type mandibular 2nd premolar has the same number of _____ ____ as the mandibular 1 molar. occlusal pits
134. From the facial or lingual views, canines have a _____ outline. pentagonal
135. The maxillary 1st molar has a ______ concavity that can pose special problems in matrix placement. distal concavity
136. The cervical cross section of the maxillary 1st premolar exhibits a _____ shaped root outline. kidney
137.The cervical cross section of the maxillary 1st premolar exhibits a _____ shaped pulp chamber floor. kidney
138. The middle facial lobe of the of the maxillary canine includes the ____ ____. cusp tip
139. The number of lobes that form the anterior teeth is ____. 4
140. The number of lobes tht form the posterior teeth coincides with what? coincides the number of cusps
141. The _____ __ ______ is the anterior-posterior curvature of the occlusal surfaces as seen in a facial view. curve of spee
142. The _____ periodontal ligament fibers reduces the likelihood of forceful impaction into the alveolus. oblique
143. The height of contour is the ______ ____ for the facial surfaces of all teeth. gingival 1/3
144. The apex of the triangular-shaped boundary of the interproximal spaces is the _____ ____ of the teeth. contact area
145. From a facial view the crown of a primary canine has a mesio-incisal slope ____ than the disto-incisal slope. longer
146. The cusp tip of the primary canine is generally offset to the _____. distal
147. A primary molar lacks an identifiable _____ _____. root trunk
148. The maxillary canine from a proximal view tends to be positioned with the most nearly ____ axis. vertical
149. ______ is the cemental union of 2 fully formed teeth that were originally separate entities. concrescence
150. The apex of a tooth is fully formed ____ years after it erupts in the mouth. 2-3 yrs
151. The ____ _____ _____ muscle is the prime mover in effecting a left working movement. right lateral pterygoid
152. The mesial surface of a crown of a mandibular canine is almost _____ to the long axis of the tooth. parallel
153. The smallest cusp of the mandibular 1st molar is what? distal cusp
154. The cross sectional outline at the cervical is roughly ____ for the permanent maxillary 2nd molar. triangular
155. The TMJ has how many synovial cavities? 2
156. The cervical line of permanent teeth has the greatest depth of curvature on the ____ aspect. mesial
157. From a proximal view, the incisal ridge of the crown is in line with the ____ of the root. center
158. What primary tooth has the smallest faciolingual crown dimension? mandibular central incisor
159. The primary mandibular first molar has the most distinct ______ ridge. transverse
160. The condyle on the working side generally rotates about the _______ ______ and _______ laterally. vertical axis; translates
161. Occlusal view, the greatest faciolingual diameter of a mandibular 2nd molar is the ____ _____. mesial 1/3
162. More of the occlusal surface can be seen from the _____ than the _____ for a mandibular 1st premolar. mesial; distal
163. The _____ movement is the bodily shift of the mandible towards the working condyle. Bennett
164. The DL groove of a maxillary lateral incisor is an anatomical feature that complicates ____ _____ root planning.
165. _____ are a result of normal enamel apposition. perikymata
166. _____ periodontal ligament fibers are most likely to be found in the middle 1/3 of the root. oblique
167. The mandibular centrals and laterals most frequently have _____ areas on the M & D root surfaces. concave
168. The mandibular canine has a _____ prominent cingulum than the maxillary canine. less
169. The mandibular canine has a ______ ______ facial surface from incisal to apical end. continuous convex
170. Accessory pulp canals may be found in the ____ ____ of the root. cervical 1/3
171. Accessory pulp canals may contain ____ and ____ tissue. nervous; vascular
172. Accessory pulp canals may be found in _____ area of molars. furcation
173. Accessory pulp canals allow the pulp tissue to _____ with the periodontal ligament space. communicate
174. The TMJ is protected by what? synovial fluid, fibrocartilage, ligament suspension, and masticatory muscles
175. The most prone facial and lingual surfaces of molars are the _____ of ______ and the ______ of _____ lingual of maxillary; facial of mandibular
176. The function of the pulp? form & supply nutrients to dentin and transmit sensory stimuli
177. In delayed resorption of primary incisors the permanent incisors usually erupt _____. lingually
178. The disk of the TMJ is moved forward principally by the ____ _____ muscle. lateral pterygoid
179. Primary molars differs from permanent molars in that their roots are more _____. dvergent
180. The primary teeth that differ most from permanent teeth are the ____ _____. first molars
181. The highest and sharpest cusp on a primary mandibular first molar is the _____ cusp. mesiolingual
182. The maxillary central has the greatest _____ axial inclination. facio-lingual
183. The primary function of the dental pulp is to form _____. dentin
184. The shortest interdental papilla is between the ______ ______ ______and ______ _______. mandibular second premolar; first molar
185. In cross section the root of the mandibular canine is regularly ____. oval
186. The percentage of dentin that is organic is ____. 20-30%
187. The anterior tooth that is most likely demonstrate a lingual pit cavity is ______ _____ _______. maxillary lateral incisor.
188. Calcification of the primary root is normally completed at _____ of age. 3-4 yrs
189. _______ fibers are not periodontal fibers. interradicular
190. Approximately ____ of permanent root formation is completed at the time the tooth erupts. 50%
191. The ______ ______ ______ has the greatest faciolingual diameter of the crown for all teeth. maxillary first molar
192. Tooth contact almost exclusively determines ______ position. intercuspal
193. _______ ______ position is a muscle guide position. physiological rest
194. ______ ______ is a ligament guided position. centric relation
195. Centric occlusion = ________ = _________. CO; intercuspal position
196. The ideal position and height of lingual cuss of Mand 1st molar accommodates _____ ______. working movement.
197. What tooth has the longest root. maxillary canine
198. The premolar that most frequently has a single central pit is the ____ ____. mandibular second.
199. What does developmental grooves separate? separates cusp ridges from marginal ridges
200. The _______ _______ ______ most often is in abnormal relation and contact with adjacent teeth. maxillary lateral incisor
201. The lingual cusp of a mand 1st premolar is similar in development to the cingulum of a _____. canine
202. Teeth are in contact in intercuspal position during ____ masticatory swallowing. NON
203. Contraction of the lateral pterygoid produces what type of movement to the condyle? forward movement of the condyle from the articular fossa
204. The maxillary 1st molar has a wider m-d width(taper) towards the ____ than towards the _____. facial; lingual
205. Physiological rest position is also known as what? postural position
206. The primary maxillary 1st molar most often bears the greatest resemblance to a ____. premolar
207. In Posselt's envelope of motion _____ ____ position is the most superior point. maximum intercuspal
208. The molar that has the most distinct transverse ridge separating the mesial fossa is the ____ _____ mandibular 1st
209. The ____ _____ is a depression in the temporal bone, just anterior to the auditory canal. glenoid fossa
210. The center of the oblique ridge on a maxillary 1st molar is at the same level as what? the marginal ridge
210. _____ is a developmental abnormality characterized by the presence of fewer teeth than usual. oligodontia
211. Tooth # ___ & ____ are the non molar teeth having the sharpest demarcation between pulp chamber & canal. 5; 12
212. Dense ____ ___ ____ tissue covers the articulating osseous structures of the tmj. avascular fibrous connective
213. The mandibular first premolar is the only premolar that frequently has ____ pulp horn. one
214. The facial surfaces of mandibular molars are located ____ to the border of the ascending ramus. medial
215. The facial masticatory mucosa (attached gingiva) is narrowest where? mandibular first premolar
216. The DEJ occurs at the junction of where? dental papilla & inner enamel pithelium
217. Of the 3 furcations of maxillary 1st molar the ____ is the closest to the cervical line. mesial
218. Of the 3 furcations of a maxillary 1st molar the ____ is the furthest form the cervical line. distal
219. The ____ _____ muscle is NOT an elevator of the mandible. lateral pterygoid
220. Maintenance of the epithelial attachment (IS/IS NOT) a function of the periodontal ligament. IS NOT
221. Periodontal ligament fibers are made up of what? collagen
222. Periodontal ligament fibers support the tooth connecting to the dental alveolar bone via the _____. cementum
223. Does the primary first mandibular molar look like any permanent tooth? NO
224. What tooth have the greatest morphological variation and what is second to that? 3rd molars, maxillary laterals are second.
225. Maxillary 3rd molars from an occlusal view look like a heart shape because they are missing what? distolingual cusp
226. Mandibular centrals distinguished by the ____ ____, which is greater on the ____ than _____. cervical curvature; mesial; distal
227. Marginal ridge height for posterior teeth are generally ____ occlusal than the _____. more; distal
228. Mandibular first premolar has its mesial marginal ridge compared to the distal. cervical
229. Supernumerary teeth when seen in the maxillary are usually found where? between centrals or as 4th molars
230. The main component of enamel is what? inorganic matter (NOT collagen)
231. The direction of primary enamel rods in the cervical third is in what direction. occlusal direction.
232. The direction of enamel rods in the permanent teeth in the cervical third is in what direction. gingival direction
233. The lower compartment of the tmj is located where? between the condyle and the disc
234. Primary teeth appear more worn compared to permanent teeth because of what reason? less mineralized
235. What is the usual overjet? 2-4 mm
236. Difference in space from primary to the permanent dentition. 2-4 mm
237. All teeth have ____ and _____ marginal ridges. distal; mesial
238. Does the lingual cusp of the mandibular 1 premolar in normal occlusion occlude? No
239. Physiological rest position occurs when? when the muscles of mastication are in a tonic equilibrium
240. What is the movement of the condyle when the mandible moves from CO to edge to edge? down and forward
241. What has the greatest m-d crown dimention of any anterior teeth? maxillary centrals
242. T/F Max central does not have nearly identical M-D vs. I-C length. F
243. What has the greatest cervical curvature (mesial) of any other tooth? Max central
244. What teeth has the smallest m-d width of any maxillary teeth? max lateral
245. What has the most crown shape variation? max lateral
246. Of all anterior teeth, what has nearly identical m-d & facio-lingual measurement? max lateral
247. Of the incisors, what tooth has a distal contact that is farthest cervically? max lateral
248. What has the smallest crown dimensions of any tooth? mand centrals
249. What has the most symmetrical crown? mand centrals
250. What teeth has proximal contacts at the same level? mand centrals
251. Crown twisted on root. mand lateral
252. Greatest overall tooth length max canine
253. What canine has a distal bulge? max canine
254. Greatest f-l crown dimension of any anterior tooth max canine
255. Tooth with cusp tip located facial to lingual axis max canine
256. Greatest cervical prominence of any anterior tooth max canine
257. Max canine has distal contact where? centered
258. What has the straightest mesial alignment of crown to root? mand canine
259. Mand canine makes a ____ shape from crown tip to root apex C shape
260. Mad canine has incisal edge ____ to long axis lingual
261. Longest root of any mandibular teeth mandibular canine
262. Max 1st premolar only premolar with longer _____ _____ cusp ridge. mesial cusp
263. Max 1st premolar only tooth with _____ _____ ridge groove and _____ ____ concavity and _____ root depression. mesial marginal; mesial crown; mesial
264. ____ ____ premolar most symmetrical posterior tooth max 2nd
265. What tooth has the shortest root of any mandibular tooth? mand 3rd
266. What tooth has the greatest distal root inclination of any other tooth? mand 3rd
267. Cruxiform occlusal pattern mand 2nd molar
268. Molar mesial root has the greatest f-l dimension of any other root mand 1st
269. Only premolar with a central fossa mand 2nd
270. Molar has the greatest root separation of any other tooth mand 1st
271. Only premolar with lingual groove mand 2nd
272. Molar with the longest root of any other molar mand 1s
273. Only premolar with multiple lingual cusps mand 2nd
274. molar has three facial cusps mand 1st
275. Premolar has mesial marginal ridge that is more cervical than distal marginal ridge mand 1st
276. Largest O-C crown dimension of any mand molar mand 1st
277. Only premolar with a m-l groove mand 1st
278. Largest f-l crown dimension of any other mand tooth mand 1st
279. premolar with most variation of all posterior teeth in facial vs lingual cusp height mand 1st
280. Closest in size f-l vs m-d of any max posterior tooth max 1st molar
281. Smallest f-l of any posterior tooth mand 1st premolar
Created by: ddde227