Test One Dental Anatomy
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| the total number of premolars which are normally present in the entire permanent dentition is | 8
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| the total number of posterior teeth which are normally found in the entire deciduous dentition is | 8
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| during the primary dentition period, the tooth directly mesial to the deciduous canine in each quadrant is the deciduous | lateral incisior
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| the dental tissue known as the periodontal ligament is normally the attachment between | cementum and bone
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| on the crown of a tooth, a small depression which is often the point of union of two or more developmental grooves, describes | a pit
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| Consider a tooth n the mouth which had considerable recession of gingiva towards the apex of the anatomical crown, the cervical line and clinical root. What would be visible? | cervical line and anatomical crown only
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| of the following ridges, those which can be found on every tooth in the mouth are | marginal ridges
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| from the following dental formula, it can be determined that the total number of posterior teeth in an animal is I 2/2 C 1/1 P 1/1 M2/2 | 12
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| in the normal order of eruption for man's permanent mandibular teeth... | first premolar erupts after the canine
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| in the normal order of eruption for the deciduous mandibular teeth | first molar erupts before the canine
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| the human mixed dentition period normally ends | with the exfoliation of the last deciduous tooth
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| of the following pairs, the one in which both teeth are succedaneous is | #11 and #13
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| consider a posterior tooth crown which is viewed from the mesial aspect. the three thirds of the crown's medial surface, when it is divided by vertical lines are | buccal, middle, and lingual thirds
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| if an imaginary animal had dent ion which contained only eight molars per quadrant and these molars were continually replaced, what would describe them | homodont and polyphyodont
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| all buccal surfaces are facial surfaces but not all facial surfaces are buccal surfaces (T/F) | True
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| all transverse ridges are made up of triangular rides but not all triangular ridges form transverse ridges (T/F) | True
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| What is a mamelon? | ridges of enamel at incisal edge found on permanent incisors
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| why do you not find mamelons in adults? | occlusion wears them away
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| a line between primary parts of a crown is called an | developmental groove/depression
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| a ____ _____ denotes the junction of three surfaces | point angel
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| a ____ ____ is the junction of two surfaces | line angel
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| to indicate location on a tooth or root, the tooth is arbitrarily divided into _____ from facial/lingual, proximal and occlusal views | thirds
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| each cusp has four ridges emanating from it name them for the lingual cusp of #4 | Buccal or triangular
distal, mesial, and lingual
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| the biting edge of #8 is called | incisal edge
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| the surfaces of #5 closest to the midline is called the | mesial
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| the tip of a root is called the... | apex
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| the ridge on #14 that goes from DB to ML is called | oblique ridge
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| the chewing surface of a posterior tooth is called the... | occlusal surface
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| the structure of the roof of the mouth is called the... | palate
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| the surface of #32 which is towards the back of the mouth is called the.... | distal surface
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| the surfaces towards the tongue are called | lingual
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| all surfaces towards the cheek are called... | facial or buccal
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| where two teeth touch (in the same arch) is called the... | contact area
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| the surfaces towards the lip are called | labial or facial
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| the ridge on #30 which extends from the DB cusp to the central groove is called a | triangular ridge
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| the ridge that extends from MB cusp tip to ML cusp tip on tooth 31 is called | transverse ridge
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| the ridge on the oclusal surface of #20 which is towards the midline is called | marginal ridge
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| how many posterior teeth in the mandibular arch | 10
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| how many posterior teeth in the deciduous mandibular arch | 4
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| what are the names of man's two sets of teeth? | primary, permanent
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| write down the teeth by their number that are succedaneous in the human | 4,5,6,7,8,9,10,11,12,13
20,21,22,23,24,25,26,27,28,29
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| which jaw in the human moves? | mandible
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| how many permanent teeth are in man's upper right quadrant? non extracted and all erupted | 8
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| how many deciduous teeth are in man's upper right quadrant? none extracted all erupted | 5
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| what is the name of the bony entity that surrounds and supports all of the teeth | alveolar process
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| name the upper arch | maxilla
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| how many premolars are in the upper arch | 4
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| the midlines are located between which two teeth | central incisors
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| what is the dental formula for man's permanent teeth | I 2/2 C 1/1 P 2/2 M 3/3
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| the fourth teeth from the midline is called | permanent first pre molar
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| tooth C is named | primary maxillary right canine
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| which permanent teeth erupt first | mandibular first molars
they are not succedaneous
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| how many premolars are in the deciduous dentition | 0
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| What is human dentition classified as | heterodont
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| Heterodone means | comprised of different types, or classes, of teeth to perform different functions in the mastication process
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| Homodont means | all of the teeth are the same in form and type
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| Diphyodont means | separate sets of teeth or dentions
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| Monophyodont meants | only one set of teeth
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| Polyphyodont means | more than two or continuous sets of teeth are developed throughout life
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| mixed dentition phase is | when both deciduous and permanent teeth are present
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| deciduous dentition is... | the teeth of the first or primary dention
20 total teeth
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| Permanent dentition is... | the teeth of the second or adult dentition
32 permanent teeth
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| Incisors location | two teeth of each quadrant which are closets to the midline
4 permanent incisors per arch, total of 8 in the mouth
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| Incisors function | biting, cutting, incising and shearing
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| Canine location | third tooth from the midline in each quadrant (cuspid)
two permanent canines per arch, total of 4 in mouth
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| Canine function | cutting, tearing, piercing and holding
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| Premolars location | fourth and fifth teeth from the midline (first and second premolars or bicuspids)
4 per arch, 8 total
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| Premolars function | tearing, holding, and grinding
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| molars location | sixth and seventh and eight teeth from the midline (first, second, and third molars) (6, 12, wisdom teeth)
6 permanent molars per arch, 12 total in mouth
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| molars function | grinding
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| deciduous dentition formular | I 2/2 C 1/1 M 2/2
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| Palmer notion method is | number used with quadrant symbol
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| FDI system is | bionomial system which includes both permanent and deciduous teeth, identifies the quadrant, and whether the tooth is permanent or deciduous, second number identifies the quadrant
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| Anatomical Crown | that portion of the tooth which is covered by enamel
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| clinical crown | tooth which is visible in the mouth
may not correspond with anatomical crown depending on soft tissue
Can change throughout a person's lifetime
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| Anatomical Root | that portion of the tooth which is covered with cementum
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| Clinical Root | that portion of the tooth which is not visible in the mouth
clinical root is an ever changing entity and may or may not correspond to the anatomical root
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| Enamel | hard mineralized tissue which covers the dentin of the anatomical crown of a tooth. Hardest living body tissue but is brittle
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| Dentin | Hard tissue which forms the main body of the tooth, surrounds the pulp cavity and is covered by the enamel in the anatomical crown and by the cementum in the anatomical root. Not directly visible
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| Cementum | the layer of hard, bonelike tissue which covers the dentin of the anatomical root of a tooth
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| Cervical Line, cement-enamel junction (CEJ) | delineates the anatomical crown from the anatomical root of a tooth.
the cementum usually overlaps the enamel
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| cervical line separates the... | anatomical crown and the anatomical root
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| dentoenamel junction or DEJ | the internal line of meeting of the dentin and enamel in the anatomical crown of a tooth
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| Pulp | the living soft tissue which occupies the pulp cavity of a vital tooth
it contains the tooth's nutrient supply in the form of blood vessels, as well as the nerve supply
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| pulp cavity | the entire internal cavity of a tooth which contains the pulp
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| Pulp cavity consists of... | pulp canal, pulp chamber, pulp horn
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| pulp canal | the portion of the pulp cavity which is located in the roots of the tooth, and may also be called the root canal
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| pulp chamber | the enlarged portion of the pulp cavity which is found mostly in the anatomical crown of the tooth
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| pulp horns | the usually pointed incisal or occlusal elongations of the pulp chamber which often correspond to the cusps or lobes of the teeth
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| alveolar process | the entire bony entity which surrounds and supports all the teeth in each jaw member
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| alveolus | the bony socket or portion of the alveolar process into which an individual tooth is set
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| periodontal ligament (membrane) | the fibrous attachment of the tooth cementum to the alveolar bone
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| gingia | gum or gums or the fibrous tissue enclosed by mucous membrane that covers the alveolar processes and surrounds the neck of the teeth
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| proximal | any surface between two teeth
normally only mesial or distal surfaces
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| line angle | line or angel formed by the junction of two crown surfaces, and its name is derived by combining the names of those two surfaces
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| Point Angle | the point which is the junction of three crown surfaces and takes the name of those three crown surfaces
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| crown artificial thirds vertically (anterior) | labial, middle and lingual thirds
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| crown artificial thirds horizontally | incisal, middle, cervical thirds
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| root artificial thirds | cervical, middle and apical thirds
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| cusps | elevated and usually pointed projections of various sizes and shapes on the crowns of teeth
usually on posterior and canine teeth
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| incisors do not posses what | cusps
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| how many cusps for canines | one cusp
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| how many cusps for premolars | two or three
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| how many cusps for molars | four or more
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| tubercles | rounded or pointed projections found on the crowns of teeth, not normal findings but not rare
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| cusp of carabelli | a tubercle normally found on the mesial part of the lingual surface of permanent maxillary first molars
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| cingulum | a large rounded eminence on the lingual surface of all permanent and deciduous anterior teeth, which encompasses the entire cervical third of the lingual surface
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| ridges are | linear and usually convex elevations on the surfaces of the crowns of teeth which are named according to their location
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| marginal ridges | linear elevations which are convex in cross section and are found at the mesial and distal terminations of the occlusal surface of posterior teeth
less prominent on anterior teeth
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| triangular ridges | linear ridges which descend from the tips of cusps of posterior teeth towards the central area of the occlusal surface.
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| Transverse ridge | a union of two triangular ridges of a posterior tooth, one from the buccal cusp and the other from the lingual cusp and also is composed of two triangular ridges
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| oblique ridge | special type of transverse ridge which crosses the occlusal surface of most maxillary molars of both dentions in an oblique direction from the fistobuccal to the mesiolingual cusps
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| cusp ridge | each cusp has four ridges extending in different directions from its tip
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| inclined plane | sloping area found between two cusp ridges. planes are named by combing the names of the two cusp ridges between which they lie
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| mamelons | small rounded projections of enamel which are found in varying sizes and numbers on the incisal ridges of recently erupted incisors
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| fossa | an irregular usually rounded depression or concavity on the crown of a tooth.
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| developmental groove | a groove or line which usually denotes the coalescence of the primary parts or lobes of the crown of a tooth
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| supplemental groove | an auxiliary groove which branches from a developmental groove, normally not as deep as the primary (developmental) groove
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| pit | a small depressed area where developmental grooves often join or terminate, a pit is usually fond int he deepest portion of a fossa
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| contact area | the area on a proximal surface of the crown that contacts the adjacent tooth in the same arch
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| lobe | one of the primary anatomical divisions of the tooth crown often separated by identifiable developmental grooves
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| Primary eruption schedule | central incisors (6-7 months)
Lateral incisors (7-9 months)
First Molars (12-14 months)
Canines (16-19 months)
Second Molars (20-24 months)
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| during primary eruption schedule what is important to remember? | mandibular precedes maxillary
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| permanent eruption schedule | first molars (6 years)
incisors (6-9 years)
Mandibular canine (9 years)
premolars (10-12 years)
maxillary canine (12 years)
second molars (12 years)
third molars (17-21 years)
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| mastication is | process of biting
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| occlusion is | way the mandibular teeth contact the maxillary teeth
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| primary dentition has how many molars? | 2 molars
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| convention for naming teeth? | dentition (primary or permanent), arch (mandibular, maxillary), side (right/left), tooth name
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| primary teeth are fully erupted between what ages? | 0-6 years of age
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| mixed dentition are from what ages | 6-12 years of age
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| permanent teeth are fully in the mouth | 12 and on
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| primary tooth root... | resorbs
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| tooth lost is... | exfoliated
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| succedaneous is | permanent teeth that replace primary teeth
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| succedaneous applies to... | 20 of the permanent teeth, the incisors, canines and premolars
NOT THE MOLARS
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| what teeth are not succedaneous | the molars in permanent teeth
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| complete root formation | follows tooth eruption by approximately two years in most patients
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| alveolus | bony socket of each tooth
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| perodontal ligament | fibrous attachment of the tooth cementum to alveolar bone
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| alveolar process | entire bony entity which surrounds/supports the teeth in each jaw
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| which tooth is not considered proximal? | distal of 3rd molars
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| apical foramen | blood supply and nerve come into the pulp
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| root trunk is... | between the CEJ and where the root bifurcate
not present on incisors
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| what are the only anterior teeth with a cusp | canines
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