Pericoronal Radiolucencies Flashcards
(45 cards)
what are the periocoronal radiolucencies that do not contain radiographic flecks
- normal follicular space
- pericorontitis
- dentigerous cyst: ameloblastoma, SCC
- eruption cyst
- ameloblastic fibroma
what are the pericoronal radiolucencies that may contain radiopaque flecks
- ameloblastic fibro- odontoma
- odontoameloblastoma
- adenomatoid odontogenic tumor
- calcifying epithelial odontogenic tumor
- calcifying odontogenic cyst
what is the follicular space
remnant of dental follicle adjacent a developed crown of an unerupted or impacted tooth should be no greater than 3mm on a pano or 2.5mm wide on intraoral film or 2mm on CBCT
when will the follicle be lost
when the tooth erupts
what is pericoronitis
if dental follicle gets infected the inflammation often spreads along the deep fascial planes
- staph infection
what is the dx of pericoronitis dependent on
- evidence of periocoronal tissues and the clinical signs and symptoms of disease
- edematous, erythematous mucosa, pain, fever, malaise
- cellulitis to fascial plane causing dramatic facial swelling
what is the most common cyst in the jaws
a periapical cyst
what is the second most common cyst in the jaws and what is another name for it
dentigerous cyst
AKA follicular cyst
what is the clinical cause of a dentigerous cyst
cystic lining arises from remnants of dental follicle
dentigerous cyst accounts for ____ of jaw cysts
20%
how does a dentigerous cyst appear radiographically
- consistently widened follicular space of greater than 2mm in the widest extension
- well-delineated radiolucency with corticated borders
what do dentigerous cysts tend to do
expand and displace
what is the common age for dentigerous cysts
highest incidence in20s and 30s
what are the most common sites for dentigerous cysts
mandibular third molars and maxillary canines, can affect any impacted tooth
what is the management of a dentigerous cyst
-enucleate
- degree of surgery dependent on size of tumor
there is potential for a dentigerous cyst’s lining to degenerate into:
an ameloblastoma or a SCC
what is the clinical presentation of an eruption cyst
presents as a soft fluid filled swelling of crestal mucosa in area of an erupting tooth
- often has bluish coloration due to trauma creating blood in cystic fluid
what is the radiographic presentation of an eruption cyst
may see lack of crestal alveolar bone because of position of erupting crown and cyst near crest
what is the common age and site for eruption cysts
- less than 10 years old in the mixed dentition stage
- most common site in mandibular molar region
what is the tx for an eruption cyst
- often rupture spontaneously
- some may require simple excision
what is the clinical presentation of an ameloblastic fibroma
- a mixed odontogenic tumor
- not cystic
what is the radiograophic presnetation of an ameloblastic fibroma
- pericoronal radiolucency associated with a developing tooth
- well demarcated
- often corticated
- explansive
- displaces structures
- unilocular radiolucnecy not always associated with a developing tooth
what is the predilection for ameloblastic fibroma
- 70% of cases are less than or equal to 20 years
- mean age 14-15.5 years
- male = female
- highest incidence in mandibular molar premolar region
what is the tx for ameloblastic fibroma
enucleation
