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Radiology > Exam 4 > Flashcards

Exam 4 Flashcards

(66 cards)

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1
Q

Which type of radiograph provides OPTIMAL visualization of proximal and occlusal caries in POSTERIOR teeth?

A

Bitewings

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2
Q

WHich type of radiograph is appropriate for viewing ANTERIOR proximal caries?

A

PeriApicals

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3
Q

Which technique improves visibility of a lesion?

A

PARALLELING technique

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4
Q

What is the most radiopaque human tissue?

A

enamel

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5
Q

Radiographs do not demonstrate incipient disease, as a minimum of ___-___% demineralization must occur before radiographic changes are apparent

A

55-60%

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6
Q

When you see cavitation on a tooth radiographically, what % of the time is the lesion into the dentin?

A

50%

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7
Q

What are two advantages to having vertical OR horizontal bitewings when assessing periodontal disease?

A

1.Assess crestal bone 2.minimize geometric DISTORTION

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8
Q

Besides bitewings, what other 2 images are good for evaluating periodontal disease?

A

periapicals and pano’s

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9
Q

In a healthy periodontium what is the distance between the CEJ and the crestal bone?

A

Biological width (2.04mm)

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10
Q

What does a SCLERODERMA look like radiographically? (What happens to PDL, Lamina Dura?)

A

Widening of the PDL, Lamina dura remains intact

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11
Q

How does a sclerotic bone reaction occur?

A

INFLAMMATION

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12
Q

What does an Apical Sclerosing Osteitis (ASO) appear? _______ become thickened, numbers of trabeculae increase, overall bone density increases

A

Trabeculae

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13
Q

Are aggessive periodontitis patterns of bone loss horizontal or a deep vertical defect?

A

DEEP Vertical bone defect

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14
Q

Patiens with WHAT condition have more predilection for periodontal disease?

A

UNCONTROLLED DIABETES

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15
Q

SUPERNUMERARY TEETH: Occur in ___-___% of the populaiton and which SEX are they more common in?

A

1-4%…2x more common in MALES

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16
Q

SUPERNUMERARY TEETH: Which dentition (perm or primary) are they MORE common in?

A

more common in permanent dentition

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17
Q

What are the three most common terms for supernumerary teeth?

A

Mesodens, peridens, distodens

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18
Q

What is the most common location for a supernumerary tooth?

A

Mesodens (from prior knowledge, not specifically in slides)

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19
Q

What are the three syndromes associated with supernumerary teeth?

A

Cleido-Cranial Dysplasia, Gardiner’s Syndrome, and Pyk-ody-SOS-TOSIS

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20
Q

What is the most common developmentally missing tooth? What is the second most common?

A

3rd molars most common… max lateral incisors 2nd

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21
Q

Which tooth anomaly has this differential diagnosis? vascular anomalies; hemangioma, hemihypertrophy, pituitary gigantism, gemination, fusion.

A

Macrodontia

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22
Q

Which anomaly results from the union of adjacent tooth germs?

A

Fusion

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23
Q

WHEN does fusion occur? Contact and fuse before ________

A

CALCIFICATION

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24
Q

In concrescence roots of two or more primary or permanent teeth are fused by ______.

A

cementum

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25
Which anomaly occurs when a single tooth bud attempts to divide?
Gemination
26
Which dentition (primary or permanent) does gemination occur more frequently?
Primary
27
Which anomaly is defined as the body of tooth appears elongated and roots short
taurodontism
28
What are two common systemic conditions that are associated with taurodontism?
Trisomy 21 and Amelogenesis imperfecta
29
Which dental anomaly are these describing? Dens in Dente, “Tooth within a tooth”, Dilated Odontome
Dens invaginatus
30
Which anomaly is more severe and which is less severe? Dens invaginatus and Dilated Odontome...
D.I. - less severe....D.O. most severe
31
What are the 4 general types of Amelogenesis Imperfecta?
1.Hypoplastic 2. Hypomaturation 3.Hypocalcification 4.Hypomaturation/Hypoplastic with Taurodontism
32
WHICH form of A.I. occurs when enamel fails to develop to normal thickness?
hypoplastic
33
WHICH form of A.I. occurs when the enamel has a mottled appearance and normal thickness?
hypomaturation
34
Which form of A.I. occurs when crowns are normal in size and shape and the enamel is regular thickness?
Hypocalcification
35
Which form of A.I. has color of underlying dentin is yellowish-brown?
HypoPlastic
36
Which form of A.I. has “Snow-capped” – white, opaque enamel?
HypoMaturation
37
Which form of A.I. 􏰊Enamel – poorly mineralized (less dense than dentin) 􏰊Fractures under function 􏰊Enamel and dentin abrade away → glossy, worn tooth 􏰊Explorer can penetrate yet caries is unusual 􏰊Increased permeability → staining, dark brown??
Hypocalcification
38
IN the combo of hypomaturation/hypocalcification of A.I....it Involves which dentition? (perminant or deciduous)
HA tricked ya! Both. perm and primary
39
Which form of AI is Enamel – same radiopacity as dentin?
Hypomaturation + Hypocalcification
40
What condition is described as a genetic anomaly involving primarily the dentin (enamel may be thinner)?
DentinoGenesis imperfecta
41
What are the three types of Dentinogenesis Imperfecta?
1.Osteogenesis imperfecta (Autosomal Dominant) 2. Dentin only (no bones affected) 3.Brandy-Wine (only in Maryland USA)
42
DentinoGenesis imperfecta is WHAT COLOR-like translucency, colors – yellow to blue-gray
AMBER
43
What is a globule of enamel 1-3 mm in diameter and effects | 􏰊3% of population?
an enamel pearl
44
In a MATURE inflammatory lesion the bone becomes more _________... Which type of bone is doing this?
RadioPaque...TRABECULAR
45
What is the HALLMARK sign of OsteoMyelitis?
sequestra of bone
46
What does the term Rarefying indicate?
radiolucence
47
What does the term scelrosing indicate?
radiopaque
48
What are three possible causes of osteomyelitis that then cause inflammation spreading to the bone marrow?
1.Non-vital tooth 2.trauma 3.hematogenous
49
What is the most common source of osteomyelitis?
non-vital pulp (im guessing here. wish me luck)
50
Where does OsteoradioNecrosis most commonly occur? What is the typical dose that starts this progression?
posterior mandible...doses above 50 Gy
51
BISPHOSPHONATES: Pyrophosphates that act to inhibit _________ and reduce bone metabolism.
OSTEOCLASTS
52
What is the most common type of cyst in the jaw and what is it caused from?
a Radicular cyst....rest of malassez proliferate from inflammation of a non-vital tooth
53
Which arch is more common for a radicular cyst?
maxilla
54
What is the second most common cyst? what causes it?
dentigerous...forms around the crown of an unerupted tooth (cej-cej)
55
In general what are 4 indicators that a lesion is benign?
1.No pain 2.Slow growth 3.No metastasis 4. Not life threatening
56
What type of Mixed odontogenic tumor is the production of mature enamel, dentin, cementum and pulp tissue?
an Odontoma!
57
What are the two forms of an odontoma? Which one is more common?
compound and complex...compound 2x more common
58
Where is the most common site of a compound odontoma?
anterior maxilla (crown of unerupted canine)
59
Where is the most common site of a complex odontoma?
mandibular 1st and second molar area (think complex extraction)
60
Where does a benign cementoblastoma typically form?
mostly in the mandible, and in the premolar-molar region
61
LOL. if you want to view an object in 3D which modality are you going to use?
Conebeam CT
62
Which type of dysplasia is ALWAYS under the IA canal?
Fibrous dysplasia
63
Which type of dysplasia has fingerprint, ground glass, cotton wool, and orange peel characteristics?
fibrous dysplasia
64
What is the hallmark sign of an osteogenic sarcoma?
"sun ray" pattern-no cortical bone
65
What is an osteogenic sarcoma sometimes confused with?
an osteoblastoma
66
Which arch and region is an osteogenic sarcoma more likely found?
posterior mandible

Radiology (5 decks)

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