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RADIO INTERPRETATION > Radio anomolies > Flashcards

Radio anomolies Flashcards

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1
Q

dental anomolies may be what in nature?

A

developmental or acquired

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2
Q

Hyperodontia

A

Teeth in excess of the normal complement (more than what there should be like having 4 of a molar)

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3
Q

Maxillary incisors hyperdontia name

A

mesiodens

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4
Q

Maxillary fourth molars and Mandibular fourth molars names

A
  • distodens,
  • paramolars
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5
Q

tooth type for hyperdontia prevalence in order:

A

max I>max M> man M> PM> C/LI

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6
Q

what can be seen here?

A

mesiodens

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7
Q

cystic change of supernumerary teeth

A

cystic change of follicle may or may not occur
increased likelyhood with exposure to inflammatory mediators
probability inversely related to age, however surgery better tolerated by younger pts

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8
Q

what can be seen here? where is it located?

A

odontoma, moves D with a D shift so this is located on palatal aspect (SLOB)

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9
Q

how could CBCT be useful for supernumerary teeth? con?

A

when there are many, the more there are the harder it becomes to locate them with simple technique (SLOB)
comes at an additonal cost

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10
Q

is there an anomoly? complications?

A

yes, a supernumary tooth is present at apex of PT tooth= inflammatory mediator present which can cause cystic change but this has yet to occur
the longer this is left the more likely ankylosis becomes too resulting in a difficult removal if problems arise

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11
Q

anomoly?

A

yes supernumerary tooth

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12
Q

anomoly, complcation?

A

distodens (3)
potential for pericoronal infection at the mandibular ones

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13
Q

impacted molar removal

A

best to remove these asap, more likely to undergo cystic degeneration

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14
Q

anomoly

A

impacted molar but not supernumerary

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15
Q

where is it most likely to have multiple hyperdontia (>1 extra tooth)

A

PM area

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16
Q

Syndromes with multiple teeth

A
  • Cleidocranial Dysplasia
  • Gardner
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17
Q

Cleidocranial Dysplasia additional signs

A
  • Frontal & parietal bossing
  • Clavicular aplasia
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18
Q

Gardner Syndrome additional signs

A
  • Autosomal dominant- family Hx
  • Multiple osteomas including the jaws
  • Colorectal polyps with malignant potential
  • Multiple supernumerary teeth
  • Lesions of skin (cutaneous epidermoid cysts
    and fibromas)
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19
Q

what discussed syndrome is lilkely present

A

gardner

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20
Q

Problems with Supernumeraries

A
  • Affect eruption of normal complement of
    teeth
  • Cystic degeneration of follicular epithelium of impacted teeth
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21
Q

what issue are supernumerary teeth causing in this child (4.5y)

A

difficulty with proper eruption

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22
Q

what issue have supernumerary teeth caused in the mandible?

A

cystic degeneration

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23
Q

Hypodontia

A

less than the normal tooth complement of an existing dentition; permanent or deciduous
less than one or more of an existing dentition; permanent or deciduous

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24
Q

Anodontia

A

congenital absence of all teeth

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25
Anodontia v. Oligodontia v. Hypodontia
* Anodontia – agenesis of all teeth * Oligodontia – congenital lack of > 6 permanent teeth, excluding third molars * Hypodontia – less than one or more of an existing dentition; permanent or deciduous
26
types of hypodontia
1. Acquired 2. Syndromal 3. Reduction phenomenon - Third Molar Agenesis - Maxillary Lateral Incisors - Microdontia - Isolated Agenesis
27
most common type of hypodontia
acquired
28
how many syndromes have hypodontia associations
about 150
29
more common syndromes associated with hypodontia
* ectodermal dysplasia * oligodontia-colorectal cancer syndrome * ectodermal dysplasia with oligodontia-colorectal cancer syndrome * otodental dysplasia – associated with deafness * Rieger Syndrome – associated with deafness
30
dental complications of ectodermal dysplasia
hypo or anodontia malformed teeth prone to caries (enamel defects and xerostomia)
31
malformed teeth
can be cone or peg-shaped
32
malformed teeth: cone/peg shaped
33
Reduction Phenomenon
* Hypodontia not associated with other multiple system congenital syndrome * Seen with third molars and maxillary lateral incisors * Evolutionary trend ?
34
most common form of the reduction phenom
thrid molar agenesis, 10-25%/ up to 30% have 1-4 missing
35
comparing top to bottom
bottom image displays man 1 molar missing: could be hypodontia, agenesis, etc. many other teeth are missing but would need med/tx history to know why
36
why are the man molars missing here?
likely extracted, note the furcal aleolar bone is still present
37
Agenesis of Maxillary Lateral Incisor AMLI
* Uni/bilateral reduction, i.e., peg lateral maxillary incisors AD inheritence, variable expression possible: * Uni/bilateral agenesis * a variable manifestation hypodontia
38
what is missing
Agenesis of Maxillary Lateral Incisor AMLI
39
anomoly present?
AMLI, peg/cone shape
40
AMLI
41
microdontia
teeth smaller than usual, can affect one (microdont) to many teeth
42
how would you classify the man 3rd molars
microdonts
43
microdont
44
what complication arises with microdonts
diastemas form=food trap and caries
45
microdont
46
how common is isolated agenesis (non-third molar)
non-thrid molar hypodontia: 5-10% typical
47
what issue arises with isolated agenesis
primary teeth may be retained, can be maintained and not require removal in some cases may also lead to compromised arch form and/or occ discrepancies
48
isolated agenesis, 1 molar retained
49
isolated agenesis, 1 canine retained
50
macrodont
enlarged tooth
51
marcodont issues
may not fit arch space sus to caires and perio dx with increased grooves
52
macrodont
53
Bulky Incisor or Double tooth phenomenon | etiologies
form of macrodontia, hard to prove absolute etiology
54
macrodont likely fusion
55
macrodont
56
what could this be classified as?
Fusion, Twinning or Supernumerary
57
macrodont
58
macrodont
59
dilacerations
* Abnormal angulation or bend in the root (and occasionally the crown) of a tooth * Some related to trauma during odontogenesis * idiopathic
60
dilaceration
61
Supernumerary Roots
* Extra roots above the complement of roots classically described for the dentition
62
1st molar anomoly
3rd root
63
Supernumerary Roots * Significant for what considerations? * Appear to be excellent for>?
* Significant for endodontic or exodontic considerations * Appear to be excellent prosthodontic abutments
64
3rd root 1st molar
65
Li Root of Mandibular First Molars
* 20% incidence in Asians in a Chinese population (Hong Kong and Taiwan) * 10-12% in native North American populations
66
supernumerary roots
67
Non–carious Loss of Tooth Structure forms
Abrasion – mechanical wear of teeth Attrition – physiologic wear of teeth Erosion – chemical wear of teeth
68
attrition
69
cervical abrasion
70
what is seen in both of these?
cervical abrasion
71
erosion
72
likely lingual erosion= bulemia
73
taurodont
enlarged pulp chambers/ smaller roots
74
what anomoly can be noticed
taurodonts
75
taurodont etiology
* Idiopathic developmental disorder of odonogenesis causing elongation of the pulp chamber (aka apical displacement of the pulpal floor) and shorter root appendages * failure of Hertwig's epithelial sheath diaphragm to invaginate at the proper horizontal level, resulting in a tooth with short root, enlarged body, an enlarged pulp and normal dentin
76
taurodont
77
taurodont
78
when are taurodonts complicated?
endo/extractions
79
Dens Invaginatus Dens in Dente incidence rate? mostly seen where?
* 0.04 – 10% incidence * Primarily seen in lateral incisors but also centrals, premoalrs, centrals, canines.....
80
dens in dente
81
Dens Invaginatus Dens in Dente types
* Type I – coronal * Type II – extends apical to CEJ * Type III – extends through root perforating to apex
82
dens in dente complication
can act as a food trap= caries
83
two dens in dente type I
84
dens in dente type 2
85
type 3 dens in dente
86
Dens Invaginatus Dens in DenteTreatment
restore the coronal pit
87
talon cusps
88
drift vs migration
drift: movement of erupted teeth migration: movement of unerupted teeth
89
impacted teeth
I. Full impaction vs. partial impaction II. Orientation - Vertical - Inverted - Mesioangular - Distoangular - Horizontal - Inverted Mesioangular - Inverted Distoangular
90
what is the orientation of impacted teeth needed for?
evaluate prognosis and surgical management
91
name this
inverted mesioangular impacted tooth
92
vertical partial impaction
93
vertical full impaction
94
Describe the impacted tooth
vertical distoangular full impaction
95
inverted mesioangular full impaction
96
horizontal full impaction
97
Problems with Supernumeraries and Impacted Teeth
* Affect eruption of normal complement of teeth * Cystic degeneration of follicular epithelium
98
enameloma
ectopic globule of enamel formation at the root surface AKA enamel pearl
99
enameloma
100
dentinoma etiology
* may result from proliferation of conn tissue and hertwig's epithelial root sheath cells * epithelial remnants induce undifferentiated conn tissue cells to transform into odontoblasts and produce dentin
101
dentinoma
102
dentinoma
103
dentinoma

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