Dental Anatomy Facts

Frage	Antworten
Difference in space from primary to permanent dentition? ___ mm	2-4 mm
When is calcification of primary roots normally completed?	3-4 years of age
What is the pattern of eruption for primary teeth?	Anteriors, Laterals, 1st molars, CANINES, 2nd molars Lowers before Uppers except Laterals
Primate space develops in maxillary primary dentition between?	Lateral and Canine
Mandibular primary primate space is located between?	Canine and First Molar
Primary spacing for anterior teeth is mostly caused by?	Growth of Dental Arches
Direction of Primary enamel rods in cervical 3rd is in _______ direction?	Occlusal Image: Image (binary/octet-stream)
True or False Primary molar roots are more divergent than permanent molar roots	True
True or False Root trunk of primary molars are prominent	False Image: Image (binary/octet-stream)
What primary tooth has the smallest faciolingual crown dimension?	Primary mandibular central incisor Image: Image (binary/octet-stream)
In delayed resorption of primary incisors, the permanent incisors usually erupt ______	Lingually
Which primary teeth exhibits prominent cervical ridges both facially and lingually?	Primary Central Incisors Image: Image (binary/octet-stream)
Primary Canine Crown What incisal slope is longer from facial view?	Mesial-incisal slope Image: Image (binary/octet-stream)
Where is the cusp tip offset to in the primary canine?	Cusp tip offset to Distal Image: Image (binary/octet-stream)
Which primary MAXILLARY tooth has the most prominent cervical ridge What surface? Out of all the primary teeth?	Maxillary 1st Molar(primary) Mesiofacial surface Mandibular 1st molar Image: Image (binary/octet-stream)
Which primary tooth has an oblique ridge?	Primary 2nd molars *distolingual groove Image: Image (binary/octet-stream)
Which primary tooth exhibits the most prominent facial cervical ridge?	Mandibular primary 1st molar
On facial view of primary mandibular 1st molar, where is the CEJ most apically positioned?	Mesial 1/3 Image: Image (binary/octet-stream)
Which primary tooth exhibits DISTAL triangular fossa?	Mandibular 1st molar Image: Image (binary/octet-stream)
Which primary teeth has the most distinct transverse ridge?	Mandibular 1st molar
Which primary tooth does NOT look like any permanent tooth?	Primary 1st mandibular molar
The highest and sharpest cusp on primary mandibular 1st molar is the _____________	Mesiolingual NOT mesiobuccal Image: Image (binary/octet-stream)
Teeth whose function is primarily biting are?	Incisors
Which tooth has greatest cervical curvature on mesial compared to any other tooth? CEJ dips deeper	Maxillary Central Incisors *greatest on mesial Image: Image (binary/octet-stream)
Which ANTERIOR teeth is wider mesiodistally than facio-lingually	Maxillary Incisors Image: Image (binary/octet-stream)
Which tooth has measurements that is nearly identical inciso-cervically and mesio-distally	Maxillary central incisors Image: Image (binary/octet-stream)
Non-molar tooth that most frequently has Mesial and Distal pulp horn?	Maxillary Central Incisors
Non molar least likely to have bifurcated root?	Maxillary central incisor
Non-molar most likely to have bifurcated root? Where?	Mandibular Canine Creates facial and lingual root
Contact between maxillary central and later incisor makes lingual embrasure larger or smaller than facial?	Larger
Incisal embrasure between maxillary centrals is larger or smaller than between central and lateral?	Smaller Image: Image (binary/octet-stream)
Which tooth has most crown shape variations, deviations in crown morphology, and congenitally missing?	Maxillary Laterals (except for 3rd molars)
What complicates root planning in maxillary lateral incisors?	Distolingual groove
Which tooth has greatest cervical prominence of any ANTERIOR tooth?	Maxillary Canine
Which tooth from proximal view tends to be positioned with the most vertical axis?	Maxillary canine Image: Image (binary/octet-stream)
Which tooth has the greatest overall total tooth length and longest root?***	Maxillary canine Image: Image (binary/octet-stream)
Which ANTERIOR tooth has greatest facio-lingual crown dimension?	Maxillary canine Image: Image (binary/octet-stream)
Where is the distal contact on maxillary canine?	Centered
Which tooth has the potential of contacting both anterior and posterior teeth?	Maxillary Canine
Proximal contact areas of anterior teeth	I - incisal 1/3 J - jxn of incisal and middle 1/3 M - middle 1/3 *I Just Jacked Michael Jackson's Mope Image: Image (binary/octet-stream)
Where is the cusp tip located facially/lingually?	Centered / slightly facial (lingual more visible) Image: Image (binary/octet-stream)
Which tooth has distal bulge?	Maxillary canine Image: Image (binary/octet-stream)
What shape does the crown of a canine have from facial view?	Pentagon Image: Image (binary/octet-stream)
Which tooth has straightest mesial alignment of crown to root?	Mandibular canine Image: Image (binary/octet-stream)
Which tooth has LONGEST CROWN?	Mandibular canine Image: Image (binary/octet-stream)
Which is narrower mesiodistally? Maxillary or Mandibular canine?	Mandibular canine Maxillary canine has that distal bulge Image: Image (binary/octet-stream)
Root of mandibular canine is what shape in cross section?	Irregularly oval / ovoid
Cross section of mandibular canine at CEJ is __________, but wider where?	Ovoid wider mesiodistally at facial Image: Image (binary/octet-stream)
Cervical cross section of mandibular canine root is __________ in mesio-distal direction	Flattened Image: Image (binary/octet-stream)
When compared to maxillary canine, mandibular canine has contact areas located more _____________	Incisally Image: Image (binary/octet-stream)
Which tooth has continuous CONVEX facial surface from incisal to apical end?	Mandibular canine Image: Image (binary/octet-stream)
Where is the incisal edge of mandibular canine? (lingual or facial)/	Incisal edge more lingual - can see more of facial Image: Image (binary/octet-stream)
Which MAXILLARY tooth has the most pronounced developmental groove?	Maxillary 1st premolar Image: Image (binary/octet-stream)
What makes it difficult to adapt matrix band on maxillary 1st premolar?	Mesial Concavity Image: Image (binary/octet-stream)
What is the shape of cervical cross section of maxillary 1st premolar?	Kidney shaped - because of mesial concavity Image: Image (binary/octet-stream)
Which non-molar tooth most frequently exhibits 3 roots?	Maxillary 1st premolar
Where is the facial cusp of maxillary 1st premolar offset to?	Distal Image: Image (binary/octet-stream)
Which cusp ridge is longer for maxillary 1st premolars? mesio-facial or disto-facial?	Mesio-facial Just like primary maxillary canines Image: Image (binary/octet-stream)
Which tooth has STEEPEST cusp inclines	Maxillary 1st premolars
Maxillary premolar LINGUAL cusps are offset to where?	Mesial (buccal cusp is offset to distal) Image: Image (binary/octet-stream)
Which POSTERIOR tooth has the greatest cervico-occlusal crown height?	Maxillary 1st premolar Image: Image (binary/octet-stream)
Which non-molar teeth has the sharpest demarcation between pulp chamber & canal?	Maxillary premolar
Which POSTERIOR tooth is most symmetrical?	Maxillary 2nd premolar
Wrinkly tooth Short central groove with LOTS of supplemental grooves	Maxillary 2nd premolar
Which ANTERIOR tooth has nearly identical mesio distal and facio-lingual measurements?	Maxillary lateral incisors
How are mandibular centrals distinguished?	Cervical curvature Greater on mesial than distal
First succedaneous tooth to erupt in the mouth?	Permanent Mandibular Central Incisors Succedaneous - takes the spot of primary tooth
Which crown tilts distally in relation to long axis?	Mandibular laterals Image: Image (binary/octet-stream)
Which ANTERIOR tooth has the greatest cervical prominence?	Maxillary canine
Which MANDIBULAR tooth has the longest root?	Mandibular canine Longest root overall is maxillary canine
Which tooth has a uniquely prominent triangular ridge (snake eyes - no central grooves)	Mandibular 1st premolar
Where is the developmental groove on mandibular 1st premolar?	Mesiolingual from occlusal pit Image: Image (binary/octet-stream)
What is an identifying characteristic for mandibular 1st premolar? What angle does it run?	Mesio-lingual groove 45 degree angle Image: Image (binary/octet-stream)
Which is the only premolar that frequently has only 1 pulp horn?	Mandibular 1st premolar
Does the lingual cusp of mandibular 1st premolar occlude?	No. It's shorter
Which tooth has the most variation of ALL POSTERIOR TEETH in facial vs lingual cusp height?	Mandibular 1st premolar
Where is facial masticatory mucosa (attached gingiva) narrowest?	Facial aspect of mandibular premolar
Which tooth has the smallest facio-lingual measurements of ANY POSTERIOR tooth?	Mandibular 1st premolar
Which of ALL mandibular teeth is closest facio-lingual and mesio-distal diameter	Mandibular 1st premolar Image: Image (binary/octet-stream)
What is the occlusal outline of mandibular 2nd premolar? Occlusal table?	Pentagonal Rectangular Image: Image (binary/octet-stream)
Premolar that is most likely to have a crescent shaped central developmental groove	Mandibular 2nd premolar
Where is the shortest interdental papilla? Between which teeth?	Between mandibular 2nd premolar and 1st premolar
Which is the only premolar with multiple lingual cusps?	Mandibular 2nd premolar Image: Image (binary/octet-stream)
Which is the only premolar with a lingual groove?	Mandibular 2nd premolar Image: Image (binary/octet-stream)
Which is the only premolar with central fossa?	Mandibular 2nd premolar Y shaped Image: Image (binary/octet-stream)
The premolar that most frequently has single central pit is the ____________	mandibular 2nd premolar
What is the most congenitally missing premolar?	mandibular 2nd premolar
Where does the maxillary 1st molar tend to taper toward? facial/lingual	Facial - buccal embrasure is larger Image: Image (binary/octet-stream)
Which is the largest root of maxillary 1st molar?	Palatal
What is the smallest root of maxillary 1st molar	distobuccal
Of the 3 furcations of maxillray 1st molar, which is closest to cervical line?	Mesial Image: Image (binary/octet-stream)
Of the 3 furcations of maxillary 1st molar, which is the furthest from cervical line?	Distal Image: Image (binary/octet-stream)
Oblique ridge of maxillary 1st molar forms what boundary of central fossa?	Distal boundary Image: Image (binary/octet-stream)
Oblique ridge of maxillary 1st molar connects what cusps?	Mesio lingual & Disto facial Image: Image (binary/octet-stream)
Which cusp of the maxillary 1st molar occludes with central fossa of mandibular molars>	Mesiolingual cusp Image: Image (binary/octet-stream)
Which tooth has the greatest facio-lingual diameter of crown of ALL teeth?	Maxillary 1st molar (think of cusp of carabelli)
Which MAXILLARY POSTERIOR is closest in size facio-lingually vs Mesio-distally?	Maxillary 1st Molar
What is the only cusp of maxillary 1st molar that is not part of molar cusp triangle?	Distolingual cusp Image: Image (binary/octet-stream)
What is the largest and longest cusp of maxillary 1st molar?	Mesiolingual Cusp (the one that occludes)
What makes it hard to put matrix band on maxillary 1st molar?	Distal concavity (like mesial concavity of maxillary 1st premolar)
Which has shorter disto-lingual groove: Maxillary 1st or 2nd?	Maxillary 2nd molar Image: Image (binary/octet-stream)
What is the groove pattern of mandibular 1st molar?	Y or Dryopethicus pattern Image: Image (binary/octet-stream)
What is the occlusal outline of mandibular first molar?	Pentagon Image: Image (binary/octet-stream)
Smallest cusp of mandibular 1st molar?	Distal cusp Image: Image (binary/octet-stream)
What is the largest cusp of mandibular 1st molar?	Mesiofacial Image: Image (binary/octet-stream)
Which has the LARGEST mesiodistal crown dimension of ANY tooth?	Mandibular 1st molar (think 3 buccal cusps)
Which tooth has the greatest mesiodistal Diameter of all MOLARS?	Mandibular 1st molars of any tooth actually
Which mandibular posterior teeth are the only one WIDER mesio-distally than faciolingually?	Mandibular molars
Which tooth has largest faciolingual crown dimension of ANY MANDIBULAR tooth	Mandibular 1st molar Maxillary 1st molar is largest of any tooth*
Key feature that differentiates mandibular 1st and 2nd molar	# of developmental grooves Mandibular 2nd molar has 1 buccal
Developmental groove between Distofacial cusp and Distal cusp of mandibular 1st molar is.....	Distofacial NOT DISTAL Image: Image (binary/octet-stream)
How many roots and canals does mandibular 1st molar usually have?	2 roots 3 canals - 2 in mesial
Which MOLAR tooth has the longest root?	Mandibular 1st molar
Which tooth has the greatest root separation?	Mandibular 1st molar
Which cusp of mandibular molars occlude in central fossa of maxillary molars?	Distobuccal cusp Image: Image (binary/octet-stream)
Groove pattern for mandibular 2nd molar?	Cross pattern Image: Image (binary/octet-stream)
From the occlusal view, where is the greatest faciolingual diameter of mandibular 2nd molar?	Mesial 1/3 Image: Image (binary/octet-stream)
True or False Mandibular molars the only posterior/mandibular teeth that are wider MD than FL	True Image: Image (binary/octet-stream)
Which has the greatest distal root inclination of any other tooth?	3rd molars
How does the condyles move when the mandible moves from CO to edge to edge	Forward and Downward
The non-working condyle moves...	DOWNWARD FORWARD MEDIAL DFM
What guidance plays the greatest role in discluding the posterior teeth in latero-protrusive movements?	Anterior guidance
What is the side shift of mandible?	Bennet Movement
When does Bennet movement occur?	During earliest stage of lateral movement
What is the bodily shift of mandible toward working condyle?	Bennet movement
Physiological rest position is also known as	Postural position
Mandibular postural position is determined almost exclusively by behavior of	mandibular masculature
What muscle do you use to move PP to CO	Anterior fibers of temporalis - elevating mandible - close the mouth
Image: Image (binary/octet-stream)	Curve of Spee - anterior-posterior curvature of occlusal surfaces seen in facial/buccal view
Image: Image (binary/octet-stream)	Curve of Wilson
What direction do enamel rods go in cervical third of permanent teeth?	Gingival direction
What are striae of retzius?	Developmental disturbances - run obliquely from DEJ to enamel surface *Perikymata - furrows on enamel surface
What percentage of dentin is organic?	20-30%
What is the primary function of dental pulp?	to form dentin! NOT nourish or provide sensation
What forms dentin?	Dental Papilla
Dentin that is most highly mineralized is where	intra or peritubular dentin
DEJ occurs at the junction of?	Dental papilla and inner enamel epithelium
Dental papilla cells in contact with the inner enamel epithelium are the ?	odontoblasts
What are the 2 types of cementum?	Acellular - coronal 2/3 of teeth Cellular - apical 1/3 of teeth (where blood supply is coming from)
All teeth develop from 4 lobes EXCEPT	1. permanent 1st molars 2. mandibular 2nd premolars 3 cusp type (develop from 5 lobes)
Which marginal ridge is more cervical in the mandibular 1st premolar?	Mesial marginal ridge Image: Image (binary/octet-stream)
What type of collagen is predominant connective tissue for periodontial ligament fibers?	Type I Collagen
Which PDL fibers provide major support for a tooth during furcation?	Oblique fibers
Image: Image (binary/octet-stream)	Image: Image (binary/octet-stream)
Which PDL fibers reduces likelihood of forceful impaction into alveolus?	Oblique fibers
What are transseptal fibers?	Gingival fibers - extend from tooth to tooth
All teeth have Facial Heights of Contour in the cervical third except for?	Mandibular molars - HOC is at junction of cervical and middle third
Where are the lingual heights of contour of: Anterior teeth? Posterior teeth?	Anterior teeth = cervical third Posterior teeth = middle third EXCEPT mandibular 2nd premolar = occlusal 1/3
"CEJ dips deeper"	Think maxillary central incisors (anterior, maxillary, mesial side of tooth)
Facio-lingual contacts	All teeth - usually middle 3rd of crown Posterior teeth - contact leans more toward facial
Facial embrasure is always thinner than lingual embrasure EXCEPT	Mandibular centrals (F=L) Maxillary 1st molar (F > L)

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