Pathology1 Flashcards
The congenital absence of many, but not all, teeth is known as: • hypodontia • oligodontia • diphyodontia • anodontia
oligodontia (usually six or more)
refers to the absence of only a few teeth?
Hypodontia
type II of dentinogenesis imperfecta features?
most common, only the dentin abnormality exists with no bone involvement
Which type of dentinogenesis imperfecta features multiple pulp exposures, periapical radiolucencies, and a variable radiographic appearance?
• type I
• type II
• type III
type III (In Type III, the dentin appears thin, and the pulp chambers and root canal are extremely large)
type I of dentinogenesis imperfecta features?
occurs in patients that have osteogenesis imperfecta
dentinogenesis imperfecta appearance?
The teeth exhibit an unusual translucent or opalescent appearance with color variation from yellow-brown to gray
Hypercementosis is the excessive deposition of secondary cementum on the roots. Any tooth may be involved, however, which teeth are most frequently involved? • molars • incisors • premolars • canines
premolars (Hypercementosis produces no significant clinical signs or symptoms and a continuous and unbroken periodontal membrane space)
Hypercementosis is found in which disease?
Paget disease
An enamel defect resulting from the incomplete formation of the enamel matrix is called: • enamel pearls • enamel hypocalcification • enamel hypoplasia • regional odontodysplasia
enamel hypoplasia
If only one permanent tooth is affected with enamel hypoplasia, it is usually caused by physical damage or periapical infections to the primary tooth that this permanent tooth replaced. This is known as ?
“Turner hypoplasia.”
? involves the hard tissues that are derived from both epithelial (enamel) and mesenchymal (dentin and cementum) components
Regional odontodysplasia
Regional odontodysplasia features?
short roots, open apical foramina, and enlarged pulp chambers. The thinness and poor mineralization quality of the enamel and dentin layers have given rise to the term “ghost teeth.”
the complete division of a single tooth bud. The divided teeth are seen as completely separate with no connection to each other except each tends to be mirror image of the other?
Twinning
Clinically, percussion of the ankylosed tooth produces a ?
dull sound
Which of the following statements concerning amelogenesis imperfecta are true? Select all that apply.
• it is an inherited condition that is transmitted as a dominant trait
• because of the enamel malformation, the teeth of individuals with amelogenesis imperfecta are often discolored, sensitive to temperature changes, and painful to brush
• it only affects the permanent teeth
• it causes the enamel to be soft and thin
• the teeth appear yellow because the dentin is visible through the thin enamel
• the teeth are easily damaged and susceptible to decay
- it is an inherited condition that is transmitted as a dominant trait
- because of the enamel malformation, the teeth of individuals with amelogenesis imperfecta are often discolored, sensitive to temperature changes, and painful to brush
- it causes the enamel to be soft and thin
- the teeth appear yellow because the dentin is visible through the thin enamel
- the teeth are easily damaged and susceptible to decay
which malocclusion is a common clinical finding in amelogenesis imperfecta?
Open bite
The abnormal loss of tooth structure due to nonmasticatory physical friction is referred to as: • erosion • abfraction • attrition • abrasion
abrasion
Abfraction lesions ?
are cervical erosive lesions that cannot be attributed to any particular cause; causing the enamel to “pop” off starting at the base of the tooth and exposing the gumline of the tooth to excessive wear.
Which of the following can cause intrinsic staining of teeth? Select all that apply. • dentinogenesis imperfecta • erythroblastosis fetalis • porphyria • fluorosis • diabetes mellitus • pulpal injury • internal resorption • tetracyclines
- dentinogenesis imperfecta
- erythroblastosis fetalis
- porphyria
- fluorosis
- pulpal injury
- internal resorption
- tetracyclines
the expectation of an endodontic therapy success rate in internal resorption?
relatively high success rate
the expectation of a endodontic therapy success rate in external resorption?
of no assistance, since the source of the lesion is not in the pulp
A patient with which type of amelogenesis imperfecta will have teeth with demonstrate enamel that varies from thin and smooth to normal thickness with grooves, furrows, and/or pits?
• type I (hypoplastic)
• type II (hypomaturation)
• type III (hypocalcified)
type I (hypoplastic)
Dentin dysplasia is a rare condition that has been subdivided into ?
- type I or radicular type
* a more rare type II or coronal type
In Type I dentin dysplasia, roots appear extremely short, and pulps are: • normal • somewhat smaller • extremely large • completely obliterated
completely obliterated