Chapter 26 Flashcards
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Which of the following terms describes a pathologic lesion located around a tooth crown?
B) Pericoronal
Which of the following terms describes a pathologic lesion located between teeth roots?
D) Interradicular
Which of the following terms means ‘the absence of teeth’?
B) Hypodontia
Anodontia refers to a congenital absence of teeth. Any tooth in the dental arch may fail to develop.
Which of the following terms is used to describe a radiographic examination that detects anomalies and/or lesions different from which the examination was prescribed?
C) Opportunistic screening
Is it recommended that panoramic radiographs be prescribed solely for opportunistic screening?
A) Both the statement and reason are correct and related.
Where are carotid artery calcifications located if present on panoramic radiographs?
B) Carotid bifurcation into the internal and external branches of the artery
All of the following anatomical structures can mimic the appearance of carotid artery calcifications except one. Which one is the exception?
D) Lip line
Which of the following describes a disease characterized by the loss of skeletal bone density?
B) Osteoporosis
Hypercementosis appears radiopaque and is caused by excessive cementum formation.
TRUE
Hypercementosis is distinguished from other radiopacities in bone by the absence of the periodontal ligament space.
FALSE
When observing hypercementosis, the periodontal ligament contains the radiopacity and separates it from the bone.
Radiographs should be thoroughly interpreted with the patient present so that a clinical examination can contribute to a diagnosis.
TRUE
A condition where the cementum of adjacent teeth is joined together is called ‘condensing osteitis.’
FALSE
Condensing osteitis refers to the formation of compact sclerotic bone.
A cyst is an epithelium-lined sac containing fluid or other fibrous or solid material that appears radiolucent.
TRUE
A pulpal or periapical infection may be barely discernable radiographically.
TRUE
Detection of an apical lesion on a radiograph can be definitively diagnosed based on a radiographic examination alone.
FALSE
The most common periapical lesions cannot be definitively diagnosed based on a radiographic examination alone.
The incisive canal cyst and globulomaxillary cyst can be detected by a radiographic examination.
TRUE
The dentigerous cyst is an odontogenic cyst that develops at the apex of a nonvital tooth.
FALSE
The dentigerous cyst is an odontogenic cyst that develops around the crown of an impacted tooth.
Internal root resorption is most often characterized by root-end resorption where the roots of the teeth appear shorter than normal.
FALSE
Internal root resorption appears as a radiolucent widening of the root canal.
When a developmental anomaly occurs in which the enamel invaginates within the body of the tooth, it is called ‘mesiodens.’
FALSE
A developmental anomaly in which the enamel invaginates within the body of the tooth is called ‘dens en dente.’
Dilaceration occurs as an unnatural or sharp bend in the tooth root.
TRUE
A pulp stone is a calcification in the dental pulp in the form of small radiopaque nodules.
TRUE
Fusion occurs when a single tooth bud divides and forms two teeth.
FALSE
When a single tooth bud divides and forms two teeth, it is called ‘gemination.’
The term ‘idiopathic resorption’ can apply to either external or internal resorption.
TRUE
Resorption that follows a path from inside out, or a widening of the root canal of the tooth, is external resorption.
FALSE
Tooth structure lost evidenced by a radiolucent widening of the root canal is indicative of internal resorption.
A nonodontogenic cyst arises from epithelial cells associated with the development of a tooth.
FALSE
An odontogenic cyst arises from epithelial cells associated with the development of a tooth.
An odontoma often appears as a mixed radiopaque and radiolucent mass of enamel and dentin.
TRUE
Many pathologic lesions have a similar, nondistinct appearance.
FALSE
Many pathologic lesions have a characteristic or unique appearance that assists with determining a diagnosis.
Determining density assists with identifying a pathologic lesion.
TRUE
What is the name of the process characterized by root-end resorption in which the roots of the teeth appear shorter than normal?
External resorption.
What type of resorption appears as a radiolucent widening of the root canal?
Internal resorption.
What is the term used for calcifications that may occur in the dental pulp of some teeth?
Pulp stones.
What is the term used for a region of abnormally dense bone, which, as a result of infection, has not developed?
Osteosclerosis.
What is the most common odontogenic tumor?
Odontoma.
What is the term applied to tumors that do little or no harm?
Benign.
What is the term for bone dysplasia derived from periodontal ligaments of fully developed and erupted teeth?
Periapical cemental dysplasia (PCD).
What are the two types of opportunistic screening uses of dental panoramic radiographs?
The detection of carotid stenosis and osteoporosis.
Describe why a pathologic lesion may appear lucent opaque.
Lucent-opaque or mixed lesions may indicate a simultaneous buildup of denser or calcified tissues that are replacing tissues undergoing destruction.
Describe how pathologic lesions or anomalies should be measured.
Depending on the shape of the anomaly or lesion, two measurements should be taken: height and width.
