NBDE Dental Anatomy Primary
About this set
Created by:
zreiff Plus on June 15, 2012
Description:
Primary Dentition
Log in to favorite or report as inappropriate.
Order by
67 terms
Terms | Definitions |
|---|---|
 Which teeth are wider mesiodistally and shorter incisocevically in the crown?Primary/Permanent | Primary |
| Which crowns are longer and wider mesiodistally at the cervical third of the crown? Primary/Permanent | Permanent |
| Which roots taper more rapidly? Primary/Permanent | Primary |
| Which roots are shorter and wider? Primary/Permanent | Permanent |
| Which kind of tooth has enamel ending abruptly at the cervical line, rather than becoming thinner? Primary/Permanent | Primary |
| What is special about the shape of the Primary first molar? | Its anatomy is unlike any other tooth in the mouth |
| What is the general shape of the primary first molar? How many cusps? Order of cusp size? | Oval 4 MB - ML - DB - DL |
| What surface is longer on a primary first molar? | Buccal longer than lingual Cervical ridge accross gingiva |
| What are the characteristics of the primary first molar roots? | 2 mesial longer and wider than distal Apex of mesial is flattened/squared off |
| What is the shape of the occlusal table of the primary first molar? | rhomboid |
| What is the angle shape of the primary first molar on the MB from the occlusal surface? | Acute angle |
| What is the angle of the DB region of the occlusal surface of the primary first molar? | Obtuse |
| When do the primary 1st and 2nd molars first show calcification? | 5-6 months in utero |
| How long does it take the root of a deciduous tooth to completely form? | one year after eruption |
| When is the root of a primary mand. central incisor usually formed and calcified? | 18 months of age |
| What tooth is the first to begin calcifying? When? | Mand. permanent first molar At birth |
| What are the major differences between the max. primary and Permanent canines? | Primary: Cusp - longer and sharper Mesial cusp ridge longer than distal Especially wide and short |
| Which tooth has a very large mesial marginal ridge which resembles a cusp and also has a transvers ridge from ML to MB cusps that is rather large? | Primary mand. first molar (Usually hard to restore) |
| What are the characteristics of the Primary mand. 1st molar? | Does not resemble any other tooth MB cusp always largest and longest MB cusp occupies 2/3rds of buccal surface ML larger, longer, sharper than DL Crown wider mesiodistally than high cevico-occlusally No central fossa MMR well developed Prominent MB cervical ridge |
| How many developmental lobes does a Primary max. canine have? | 4 MF, MidF, DF, L |
| What shape does the canine have from the facial? | Pentagonal |
| The sum of the mesiodistal width of primary molars in any one quadrant is greater than the permanent premolars which succed them by how much? | 2-5 mm |
| Which molars have crowns that are shorter and more bulbous with pronounced buccal and lingual cervical ridgesand a constricted cervical area? Primary/Permanent | Primary |
| Which molars have an occlusal table that is narrower faciolingually? Primary/Permanent | Primary |
| Which molars have anatomy that is deeper? Primary/Permanent | Permanent |
| Which molar has a prominent mesial cervical ridge that makes it easier to distinguish from rt. and lt.? Primary/Permanent? | Primary |
| What molars have roots that are shorter and wider? Primary/Permanent | Permanent |
| What molars have roots that are extremely narrow mesiodistally and very broad buccolingually? Primary/Permanent | Primary |
| Which molar has roots that are less divergent and more curved with a large root trunk? Primary/Permanent | Permanent |
| How do primary Incisors differ from permanent incisors? | Newly erupted permanent incisors do not show mamelons |
| What is the only Incisor with a mesiodistal diameter greater than its crown height? | Primary max. central incisor |
| Which Max. central tooth has a longer inciso-cervical length? Primary/Permanent | Permanent |
| Which max. central incisor has a straighter incisal edge? Primary/Permanent | Primary |
| Which Max. incisors have more prominent labial and lingual cervical ridges? Primary/Permanent | Primary |
| What is the largest primary tooth? | Mand. second molar |
| What is the smallest primary tooth? | Mand. lateral incisor |
| What is the largest permanent tooth? | Max. first molar |
| What is the smallest permanent tooth? | Mand. central incisor |
| Which primary molar is the most atypical of all molars, primary and permanent, and appears to be intermediate in form and development between a premolar and a molar? | Primary max. first molar |
| What is the tooth that is the smallest molar in all dimensions except labiolingual diameter? | Max. primary first molar |
| How many cusps does a primary max. first molar have? | 2 Main Wide MB Narrow ML 2 Indistinct - DB, DL |
| Which cusp of the Primary Max. first molar is the longest? | MB ML second longest/but sharpest |
| Where is the cervical line of the Primary Max. first molar? | Cervical line is higher mesially than distally |
| Where does the cervical ridge of the primary max. first molar stand out distinctly? | Mesiobuccal portion of the tooth |
| What is the occlusal pit pattern of the Primary max. first molar? | H-shaped |
| What are the characteristics of the Primary max. first molars roots? | 3 form resembles permanent max. first molar |
| Which surface on the primary first molar crown is larger? Mesial/Distal | Mesial |
| What spaces are present between primary max. lateral and canines and primary mand. canine and premolars? | Primitive spaces |
| In what kind of dentition do primate spaces appear? | Deciduous dentition |
| When do primate spaces become present? | Normally present from the time the teeth erupt |
| What are the primate spaces usually a result of? | Caused by growth of the dental arches |
| How do the cusps of the primary mand. second molar differ from the permanent mand. first molar? | Primary molar has = MB, DB, and distal cusps Permanent molar has smaller distal |
| What is the difference between the mand. primary second molar, and the mand. permanent first molar as seen from the buccal aspect? | Primary is is narrower mesiodistally at the cervical part of the crown than at the contact level |
| Why are primary mand. second molars teeth with divergent roots? | They allow for eruption of the permanent second premolar |
| Which molars have the greatest faciolingual diameter of all primary teeth? | Primary second molars |
| What are the primary teeth which present the most noticeable morphologic deviations from permanent teeth? | Primary first molars |
| What tooth does the Primary max. second molar most resemble? | Permanent Max. first molar (smaller) |
| Which primary molars are the larger size and most closely resemble the permanent first molars? | Primary second molars |
| What are primary molar relationships known as? | Step relationships |
| The distal surface of the lower second primary molar is mesial to the distal surface of the upper second primary molar. | Mesial-step relationship |
| What does the mesial step molar relationship allow the permanent first molars to do? | Allows for normal occlusion immediately on eruption. (class I occlusion) |
| Situation where the distal surfaces of the max. and mand. second primary molars are in an end to end relationship. | Flush-terminal-plane relationship |
| What is a flush-terminal-plane relationship also known as? | flat-plane relationship end-to-end relationship |
| What class of occlusion results from a flush-terminal-plane relationship? | Class II relationship |
| When a class II relationship is adjusted do to the loss of primary max. second molars thus gaining a Class I occlusion. When does this happen? | Late mesial shift occurs at age 10-11 |
| Distal surface of the mand. primary second molar is located to the distalsurface of the max. primary second molar. | Distal step relationship |
| What relationship results from a distal step? | Class II relationship |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.