30 Questions
What is the most common location for a residual cyst to be found?
In any tooth-bearing area of the maxilla or mandible
Which radiographic feature suggests secondary infection in a radicular cyst?
Destruction of cyst margin
What is a common symptom of a large radiicular cyst in the jaw?
Swelling of the jaw
What anatomical structures can be frequently involved by teeth leading to cyst development?
Maxillary sinus, nasal fossa, and mandibular canal
What is a characteristic feature of traumatic bone cysts compared to radicular cysts?
Associated with vital teeth
How do residual cysts typically present clinically?
Often discovered during routine radiographic exams
Which of the following best describes a cyst?
A pathological cavity filled with fluid, lined by epithelium
In which age group is a radicular cyst commonly seen?
Adults in the second to fifth decades of life
How do odontogenic cysts differ from nonodontogenic cysts?
Odontogenic cysts originate from tissues involved in tooth formation, while nonodontogenic cysts originate from other tissues in the oral cavity.
Which type of cyst is thought to arise from the rests of odontogenic epithelium remaining after tooth formation?
Dentigerous cyst
What is the main difference between a unilocular and multilocular cyst of the jaws?
Unilocular cysts have one compartment, while multilocular cysts have multiple compartments.
Which of the following is a type of odontogenic cyst?
Glandular odontogenic cyst
Where do dentigerous cysts typically develop?
Around the crown of the tooth
What radiographic feature is associated with an infected dentigerous cyst?
Sclerotic border is absent
Which cyst can displace the mandibular canal and adjacent teeth?
Keratocyst
What type of cyst can appear as a central, lateral, or circumferential radiolucency?
Dentigerous cyst
Which cyst is frequently associated with mandibular third molars?
Dentigerous cyst
What is a distinguishing feature of an adenomatoid odontogenic cyst?
Found in the maxillary anterior region
Where is a radiographic glandular odontogenic cyst typically located?
Anterior mandible
Which feature is characteristic of a radiographic dentigerous cyst?
Multilocular radiolucency
What is a distinguishing feature of a radiolucent area associated with an infected cyst?
Borders are missing
Which cyst is more common in males than in females?
Glandular odontogenic cyst
What is a common radiological feature of a glandular odontogenic cyst?
Root resorption of associated teeth
Which cyst shows slow, painless, locally destructive growth?
Glandular odontogenic cyst
Where is an Odontogenic Keratocyst (OKC) most commonly located?
Molar ramus area of the mandible
What is a common radiographic appearance of an Odontogenic Keratocyst (OKC)?
Multilocular radiolucency
What is a distinguishing feature of an Odontogenic Keratocyst (OKC) compared to other cysts radiographically?
Visible sclerotic borders around the lesion
Where are 80% of Lateral Periodontal Cysts reported to be located?
Mandibular premolar–canine and lateral incisor areas
How are Lateral Periodontal Cysts usually discovered?
During normal radiographic examination
What is a distinguishing characteristic of a Traumatic Bone Cyst?
Expands anteroposteriorly
Study Notes
Cysts of the Jaw
- Cyst is a pathologic cavity filled with fluid, and is lined by epithelium, most commonly occurring in the jawbones.
- Cysts can be classified into two types: unilocular and multilocular.
Odontogenic Cysts (ODC)
- ODC can be classified into two types: inflammatory and developmental.
- Inflammatory ODC:
- Radicular (dental) cyst
- Residual radicular cyst
Inflammatory ODC: Radicular Cyst
- Most commonly affects the maxillary anterior region.
- Prone to frequent trauma and is seen at the apex of non-vital teeth.
- Asymptomatic unless secondarily infected.
- Large cyst results in swelling of the jaw and mobility of adjacent teeth.
- Radiographic features: radiolucent area at the apex of the tooth with well-demarcated sclerotic margins.
- Differential diagnosis: periapical granuloma, periapical scar, traumatic bone cyst, periapical cemental dysplasia.
Inflammatory ODC: Residual Cyst
- Develops from retained periapical cysts from teeth that have been removed.
- Can also develop in a periapical granuloma that is left after an extraction.
- Clinical features: usually found in any of the tooth-bearing areas of the maxilla or mandible, painless unless secondarily infected.
- Radiographic features: radiolucent area with well-defined sclerotic margins.
- Differential diagnosis: calcifying epithelial odontogenic tumor, radicular cyst.
Developmental ODC
- Odontogenic keratocyst (OKCs)
- Dentigerous cyst
- Lateral periodontal cyst
- Glandular odontogenic cyst
- Adenomatoid odontogenic cyst
Developmental ODC: Odontogenic Keratocyst (OKCs)
- Clinical features: usually asymptomatic, mild swelling may occur, most commonly located in the molar ramus area of the mandible.
- Radiographic features: round or oval unilocular or multilocular radiolucency, less radiolucent due to the presence of keratin.
- Differential diagnosis: radicular cyst, dentigerous cyst, residual cyst, traumatic bone cyst.
Developmental ODC: Dentigerous Cyst
- Clinical features: develops around the crown of an impacted or embedded unerupted or supernumerary tooth.
- Frequently associated with mandibular third molar, maxillary canines, maxillary third molar, and mandibular second molar.
- Radiographic features: well-defined radiolucency with sclerotic borders seen at the cementoenamel junction of unerupted tooth.
- Differential diagnosis: adenomatoid odontogenic cyst, odontogenic keratocyst.
Developmental ODC: Lateral Periodontal Cyst
- Clinical features: usually asymptomatic, often discovered during normal radiographic examination, slight male predilection.
- Usually seen in the fifth or sixth decade of life, most commonly located in the mandibular premolar-canine and lateral incisor areas.
- Radiographic features: oval or round radiolucency situated laterally at the middle third of the affected tooth between the apex and the alveolar crest.
- Differential diagnosis: dentigerous cyst, radicular cyst.
Developmental ODC: Glandular Odontogenic Cyst
- Clinical features: relatively rare, occurs over a wide age range, more frequently in males, predilection for the anterior mandible.
- Shows slow, progressive, locally destructive, painless growth.
- Radiological features: well-defined multilocular, occasionally unilocular radiolucency with sclerotic or scalloped borders.
- Differential diagnosis: dentigerous cyst, radicular cyst.
Non-odontogenic Cysts
- Nasopalatine duct/incisive canal cyst
- Traumatic bone cyst
Differential Diagnosis between Odontogenic and Non-odontogenic Cysts
- Odontogenic cysts originate from the tissues involved in the formation of teeth.
- Non-odontogenic cysts originate from other tissues in the oral cavity, such as the mucosa, salivary glands, or bone.
Learn about cysts of the jaw in oral radiology with this quiz from ALHadi University College. Understand the definition of cysts, their characteristics, and types like unilocular and multilocular. Explore how cysts of the jaws are thought to originate from odontogenic epithelium rests.
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