OA L11:Tooth Morph.

Question Answer
Morphology definition: The study of shape, form and structure
Physiology definition: The study of how a structure works
What is the function of permanent incisors? Cut or incise, speech and esthetics
Mamelons in incisors: Joining of developmental lobes; usually in newly erupted
How are marginal ridges positioned/angulated in incisors? Parallel the long axis of tooth
Which incisors have a greater width, mandibular or maxillary incisors? Maxillary incisors
What are the universal annotations of the permanent incisors? #7-10 and #23-26
When do teeth #8-9 erupt? 7-8 years
When is the root complete on #8-9? 10 years
When do teeth #7 and #10 erupt? 8-9 years
Eruption dates of mandibular central incisors? 6-7 years
Root complete on mandibular central incisors? 9 years
Which has more prominent marginal ridges, max. or mand. incisors? Max. incisors
How is the root of maxillary incisors described? Cone shaped
Functions of permanent canines? Pierce, hold and tear food
What are the universal annotations of the permanent canines? #6, #11, #22 and #27
What is another name for canines? Cuspids
Which (usually) erupts first, maxillary or mandibular canines? Mandibular canines
What are the universal annotations of the permanent premolars? #5-6, #12-13, #20-21 and #28-29
Functions of permanent premolars? Grinding food
What is another name for premolars? Bicuspids
When do maxillary 1st premolars erupt? 10-11 years
Which premolar is bifurcated? #5 and #12 (Maxillary 1st premolar)
Which premolar can have 3 cusps? Mandibular 2nd premolar
When is the root complete on the maxillary 2nd premolar? 12-14 years
What teeth do permanent premolars replace? Primary molars
Which premolar has a very deep mesial concavity? Maxillary 1st premolar
Which is bigger, 1st or 2nd mandibular premolars? 2nd premolars
Which premolar has a very small lingual cusp? Mandibular 1st premolar
Maxillary or mandibular premolars have a rectangular shape occlusal outline? Maxillary premolars
What are the universal annotations of the permanent molars? #1-3, #14-16, #17-19 and #30-32
Functions of permanent molars? Chewing and grinding
Are permanent molars succedaneous or nonsuccedaneous? Nonsuccedaneous
When do permanent 1st molars erupt? 6-7 years
When is the root complete on permanent 1st molars? 9-10 years
Oblique ridge is found on what teeth? Maxillary molars, #1-3 and #14-16
Which teeth have 2 roots? Mandibular molars and maxillary 1st premolars
Which teeth have 3 roots? Maxillary molars
What is the cusp of caribelli? Accessory cusp found on the mesial lingual cusp of maxillary 1st molars
Which teeth # have a cusp of Caribelli? #3 and #14
Where is the crest of curvature for the buccal surface of mandibular molars? Cervical 1/3
Which is the longest and widest root of maxillary molars? Lingual root
Which root is longer/wider in mandibular molars? Mesial root
Which molar has 5 cusps? Mandibular 1st molars
Which teeth have the steepest CEJ? From what view? Maxillary central incisors; Mesial view
What teeth have the smallest mesial/distal diameter? Mandibular central incisors
Which teeth have the longest root? Maxillary canines
What are imbrication lines, and where are they located? Faint elevated lines at the cervical 1/3 that are parallel to the CEJ
Where are mamelons found? Incisal edge of incisors on newly erupted teeth
When do #23 and #26 erupt? 7-8 years
When do the root fully develop on mandibular lateral incisors? 10 years
Where is the contact point on the mesial for maxillary and mandibular central incisors? Incisal 1/3
Where is the contact point on the distal for maxillary central incisors? Junction of incisal and middle 1/3s
Where is the height of contour for maxillary central and lateral incisors and canine? Facial: Cervical 1/3; Lingual: Cervical 1/3
Where is the height of contour for maxillary premolars and molars? Facial: Cervical 1/3; Lingual: Middle 1/3
The lingual lone of anterior teeth creates the: Cingulum
Mandibular centrala??s proximal contact location: Incisal 1/3
Narrowest mesial-distal width of incisors: Mandibular centrals
Number of lobes to create canine cusp: 4
Most incisally placed mesial contact: Mandibular central
Most prominent cingulum of incisors: Maxillary central
This tootha??s mesial contact is more cervically placed than the distal contact: Maxillary 1st premolar
Tooth 10a??s root inclination: Distal
Number of lobes for maxillary premolara??s buccal cusp: 3
Distal contact for maxillary 2nd premolar: Middle 1/3
Tooth 12 buccal root inclination: Lingual
Right incisor with greatest mesial-distal dimension: Tooth #8
Left premolar with a mesial marginal ridge groove: Tooth #12
Left incisor with narrowest mesial-distal dimension: Tooth #24
Right lateral incisor with well developed lingual pit: Tooth #7
Left maxillary posterior tooth with one root: Tooth #13
Mandibular 1st molar buccal height of contour: Cervical 1/3
Right premolar with a mesiolingual developmental groove: Tooth #28
Left tooth with a cusp of Carabelli: Tooth #14
Left maxillary premolar with the longer central groove: Tooth #12
Right maxillary tooth with longer mesial cusp ridge: Tooth #5
Left tooth with nearly symmetrical appearance: Tooth #24
Left tooth with longest root: Tooth 11
Right tooth with prominent mesial root concavity: Tooth #5
Right tooth with three buccal cusps: Tooth #30
Left anterior tooth with lingual ridge: Tooth #11
Left tooth with mesial contact more cervically placed than the distal contact: Tooth #12
Right tooth with two equally sized lingual cusps: Tooth #31
Height of contour for lingual surface of 19 and 30: Junction of middle and occlusal 1/3
Right tooth able to take a bicuspidate or tricuspidate form: Tooth #29
Left tooth with the most prominent oblique ridge: Tooth #14
Primary right tooth with mesiobuccal bulge: Tooth B
Primary left tooth with prominent mesiolingual cusp: Tooth L
Tooth succeeded by #5: Tooth B
Predecessor of tooth #28: Tooth S
Average age when the permanent dentition is present: 12 years
Primary determinant of tooth color: Dentin
Placement of contact between tooth #8 and #9: Incisal 1/3
Left first molar with greater buccolingual dimension: Tooth 14
Right tooth with MI angle at 90 degrees: Tooth #8 and #25
In primary teeth, all surfaces have cervical ridges except: Lingual of molars
Primary teeth seem whiter due to: Thinner enamel
Which primary molar is larger, 1st or 2nd molar? 2nd molar
What are the functions of primary dentition? Maintain space, flared roots to prevent mesial drift and guide for permanent eruption
Primary 2nd molar looks like what permanent tooth? 1st molar
What are the functions of dental curvatures? Stabilize arch, prevents disease, disperse occlusal forces, and protect soft tissues
Why are contacts important? prevents food impaction and stabilization of the arch (synergy of stabilization)
What shape do embrasures make? V-shaped spaces
What are the functions of embrasures? Spill way for escape of food, reduces occlusal trauma, self-cleansing, protects gingiva and reflects tooth form

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