Lecture 3- Dental Anomalies II Flashcards
An inherited genetic mutation. Isolated or syndromic. Enamel is affected in all or nearly all teeth:
Amelogenesis imperfecta
What dentition does amelogenesis imperfecta affect?
Both primary & permanent
List and describe the 4 general types of amelogenesis imperfecta:
- Type 1: Hypoplastic type
- Type II: Hypomaturation type
- Type 3: Hypomineralized or Hypocalcified
- Type 4: Hypoplastic Type
Describe Type 1 amelogenesis imperfecta:
Hypoplastic type- thinner but hard enamel
Describe type 2 amelogenesis imperfecta:
Hypomaturation type- relatively hard but colored (not translucent) enamel
Describe type 3 amelogenesis imperfecta:
Hypomineralized or Hypocalcified- softer rough colored undermineralized enamel
Describe type 4 amelogenesis imperfecta:
Hypoplastic- Hypomature with taurodontism
What type of amelogenesis imperfecta is being described?
” Thin but mineralized enamel, looks radiopaque”
Type 1: Hypoplastic type
Type 1 amelogenesis imperfecta is a ____ enamel defect
quantitative
Type 1 amelogenesis imperfecta is a quantitative enamel defect caused by:
failure during enamel matrix security stage (enamel agenesia is rare)
Describe a teeth that are affected by amelogenesis imperfecta Type 1:
- generalized or localized, pits, striae & groove defects
- diffuse smooth, or rough
- Teeth appear white tot yellow-brown
- small teeth
- square shaped teeth
- open contacts “picket fence appearance”
- Flat occlusal surface with low cusps
- delayed eruption & increased impaction
If someone displays a “picket fence” appearance, this might be indicative of:
Type 1 amelogenesis imperfecta
Type 1 amelogenesis imperfecta, causes delayed ____ and increased ____
eruption; impaction
What can be seen in this image?
Type 1 amelogenesis imperfecta
In the following image, we notice some open contacts, what might this indicate?
Type 1 amelogenesis imperfecta
Your patient appears like this, what might be the cause?
Type 1 amelogenesis imperfecta- teeth appear white to yellow brown
What can be seen in the following pano?
Type 1- amelogenesis imperfecta
(open contacts, picket fence contact, flat occlusal surface & small cusps)
What can be seen in the following image?
Type 1 amelogenesis imperfecta (open contacts, flat occlusal surface, small cusps)
Type of amelogenesis imperfecta in which the patient has a normal thickness of enamel, but the enamel is soft (as radio dense as dentin) & less translucid
Type II- HYPOmaturation
Type 2 amelogenesis imperfecta is considered a ___ defect
Qualitative
Describe the enamel with Type 2 amelogenesis imperfecta:
- soft enamel (as radio dense as dentin)
- less translucid enamel (cloudy white, yellow, or brown color)
- hard and protective
What can be seen in the following image?
Type II amelogenesis imperfecta
What can be seen in the following image?
type II amelogenesis imperfecta
What can be seen in the following image?
Type II amelogenesis imperfecta
Type of amelogenesis imperfecta where the enamel is of a NORMAL THICKNESS but is soft, porous and sheds easily from the dentin:
Type 3 amelogenesis imperfecta
Describe the shape of the teeth with type 3 amelogenesis imperfecta (HYPOmineralized type) at eruption:
normal shape at eruption
In what type of amelogenesis imperfecta are the teeth very sensitive to even physical contact with a toothbrush?
Type III amelogenesis imperfecta (HYPOmineralized type)
Describe the enamel in Type 3 amelogenesis imperfecta:
- soft enamel- less dense than dentin in radiographs
- color of enamel can range from white to creamy yellow-brown
Describe the wear patterns seen on teeth in someone with type 3 amelogenesis imperfecta:
grossly worn teeth (to gingival level)
What can be seen in the following image?
Type 3 amelogenesis imperfecta (enamel less dense than dentin)
What can be seen in the following image?
Type 3 amelogenesis imperfecta (teeth are worn)
The ___ dentition is more severely affected with dentinogeneis imperfecta:
primary dentition
Describe the color of teeth with dentinogenesis imperfecta:
amberlike translucency (yellow to blue-grey)
In ____, the enamel separates easily from the dentin (faulty at ____)
enamel; DEJ
With deniogenesis imperfecta, accelerated attrition leads to:
anterior open bite
With dentinogenesis imperfecta, cervical constriction results in:
bulbous crowns
In dentinogenesis imperfecta, what leads to anterior open bite? What leads to bulbous crown?
- accelerated attrition
- cervical constriction
Describe the roots of teeth affected by dentinogenesis imperfecta:
short & slender roots
Describe the pulp chambers of teeth affected by dentin-genesis imperfecta
partial or complete obliteration of pulp chambers and canals
What can be seen in the following image?
dentin-genesis imperfecta
What can be seen in this radiograph?
dentinogenesis imperfecta
What can be seen in this radiograph?
dentinogenesis imperfecta
What is being described below?
- associated with osteogenesis imperfecta
- mutation in collagen synthesis genes
Type 1 dentinogenesis imperfecta
What is being described below?
- no skeletal defects
- enlarged pul chambers in primary teeth (occasional)
Type 2 dentinogenesis imperfecta
What is being described below?
- brandywine isolate
- found in people originating from southern Maryland
- enlarged pulp chambers
- pulp exposures
Type 3 dentinogenesis imperfecta
What type of dentinogenesis imperfecta is associated with a mutation in collagen synthesis?
Type 1
What types of dentinogensis imperfecta is associated with enlarged pulp chambers?
Type 2 & 3
Brandywine isolate:
Type 3 Dentinogenesis imperfecta
What can be seen in the following pano?
Dentinogenesis imperfecta
Acquired abnormalities include:
- attrition
- abrasion
- erosion
- third molar impaction
Physiologic wear of teeth:
attrition
What can be seen in this image?
mamelons
What can be seen in the following radiograph?
attrition
What can be seen in the following radiograph?
attrition
What can be seen in the following images?
attrition
Mechanical wear of teeth:
abrasion
What can be seen in the following image? What is a likely cause?
abrasion; tooth brushing abrasion
What can be seen in the following image? What is a likely cause?
abrasion; tooth pick
What can be seen in the following radiograph?
abrasion
What can be seen in the following radiograph?
abrasion
What can be seen in the following radiograph?
abrasion
What is a risk of the behavior seen int he following image?
abrasion
Chemical wear of teeth:
erosion
What can be seen in the following images?
erosion
What can be seen in the following image? What might be the cause?
erosion; acidic foods
Erosion on the lingual surface of teeth is likely due to:
bulimia
What can be seen in the following image?
erosion due to bulimia
What can be seen in the following radiograph?
erosion
What can be seen in the following radiograph?
erosion
Third molar impactions can be classified as: (2)
- full impaction
- partial impaction
What orientation of third molar impaction can be seen?
mesioangular
What orientation of third molar impaction can be seen?
distoangular
What orientation of third molar impaction can be seen?
vertical
What orientation of third molar impaction can be seen?
horizontal
What orientation of third molar impaction can be seen?
buccoangular
What orientation of third molar impaction can be seen?
linguoangular
What orientation of third molar impaction can be seen?
inverted
what can be seen in the following image?
inverted impacted third molar
what can be seen in the following image?
horizontal impacted 3rd molar
what can be seen in the following image?
distoangular impacted 3rd molar
what can be seen in the following image?
distoangular impacted 3rd molar
what can be seen in the following image?
buccoangular impacted 3rd molar
what can be seen in the following image?
