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32 Cards in this Set
- Front
- Back
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hemifacial microsomia
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-underdevelopment in half of face
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condylar/mandibular hypoplasia
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-missing chin
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midface hypoplasia
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-maxilla underdevpt
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hydrocephalus
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-huge head
-usually fatal |
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% with some form of anodontia
% with supernumerary teeth |
(-missing teeth)
- 2-5% - 1-2% |
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complete true anodontia
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-no teeth
-rare -often sex-linked genetic disease -faulty ectodermal devlpt |
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common missing teeth, starting w/ most common (3)
least likely missing teeth |
-3rd molars (max, then mand)
-max lat incisors (1-2%) -mand 2nd premolars (1%) -canines |
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Where are supernumerary teeth most common
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-maxilla (90%)
-central incisors, or maxillary 3rd molar |
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mesiodens
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-supernumerary tooth inbtw central incisors
-may or may not erupt |
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most common area for mand supernumerary teeth
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-mand premolar area
-often resemble premolars |
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teeth w/ highest rate of abnormalities (3)
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-max 3rd molars
-mand 3rd molars -max lat incisors |
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twinning (4)
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-2 crowns, 1 root, common pulp canal
-less than 1% of pop. -more common in primary dentition -usually anterior |
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fusion (5)
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-crown # and root # are same
-usually anterior -separate pulp chambers - >1% of pop -predisposed to early loss from perio disease |
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concrescence
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-fusion of cementum only
-usually in max molar region |
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prenatal syphilis
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Hutchinson's Incisors:
-screwdriver shaped, notched incisal edges Mulberry Molars -enamel underdeveoped |
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enamel pearls (3)
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-small nodules of enamel w/ core of dentin
-usually on distal of 3rd molar, buccal root fucation of molars -can predispose to perio probs b/c inhibits proper attachment |
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talon cusp (3)
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-accessory cusp at cingulum
-found max or mand ant teeth, exp lat incisors -can interfere w/ occlusion |
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microdontia (2)
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-25% smaller than average
-usually lat incisors, 3rd molars |
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hypercementosis (2)
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-excessive formation of cementum
-hard to extract b/c apical is wider than cervical |
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ankylosis (2)
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-loss of perio lig
-fused to bone |
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most common tooth to fail endodontically
why 2nd? why |
-max 1st molar
-b/c 2nd MB canal easy to miss -mand incisors -hard to find 2nd canal |
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why max canine hard root canal?
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-longest root in mouth
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max 1st premolar:
roots canals |
-2: B, L
-2 (90%) |
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max 2nd premolar anatomy:
75% 24% 1% |
75%: 1R, 1C
25%: 1R, 2C (B,L) 1%: 3R, 3C (usually bilateral anomaly) |
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max 1st molar anatomy:
70% 30% |
70%: 3R (2B,1L), 4C (2MB,1DB,1L)
30%: 3R (2B,1L), 3C |
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max 2nd molar anatomy:
40% 30% 10% |
40%: 3R (2B,1L), 3C (MB,DB,L)
30%: 3R, 4C (2MB...) 10%: 2R (B,L), 2C |
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mand incisor anatomy:
59% 41% |
59%: 1R, 1C
41%: 1R, 2C (B,L) |
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mand 1st premolar anatomy
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-highly varied
-uaually 1R, 1C |
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what tooth is 3rd most likely to fail endodontically
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-mand premolar
-b/c highly varied |
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mand 2nd premolar anatomy:
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-varied
-usually 1R,1C -12% 2C |
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mand 1st molar anatomy:
60% 40% |
60%: 2R, 3C (MB,ML,D)
40%: 2R, 4C (MB,ML,DB,DL) |
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mand 2nd molar anatomy
special variation |
-usually 2R, 3C (MB,ML,D) (like 1st molar)
-chinese variation: C-shaped canal. Hard to treat |
