odontogenic cysts part 3 Flashcards
Gingival Cyst of the Newborn appear to represent an enlarged version of ____________.
from what structure do they originate?
numerous microcystic structures, probably from dental lamina
Clinical presentation of gingival cysts of the newborn
1) Present as 1-2 mm yellow-white papules, often multiple on alveolar ridge of newborn infant
2) Usually maxillary
what are the histological characteristics of Gingival cysts of the Newborn?
A) Thin, uniform stratified squamous epithelial lining
B) Cyst lumen is packed with keratin debris
why is there no necessary treatment for Gingival Cysts of the Newborn?
These lesions will either self-marsupialize or involute/degenerate spontaneously
clinical features of Epstein’s pearls:
where are they found, from what do they originate
occur along the median palatal raphe
arise from epithelium entrapped along the line of fusion
clinical features of Bohn’s nodules:
where are they found, from what do they originate
scattered over the hard palate, often near the soft palate junction
believed to be derived from the minor salivary glands
Gingival Cyst of the Adult are related to the __________________ cyst
lateral periodontal cyst
From what structure do the Gingival Cysts of the Adult arise?
Arises from dental lamina rests in the gingival connective tissue (rests of Serres)
what population groups are prone to developing Gingival Cysts of the Adult?
Where are these cysts usually found?
Adult, over 40 years of age
anterior segments of the jaws (canine/premolar)
No apparent sex predilection
Clinical features of Gingival Cysts of the Adult:
A) Smooth-surfaced, dome-shaped elevation of the attached gingiva
B) Usually less than 1 cm in diameter
C) Tense on palpation
D) Otherwise asymptomatic
Gingival Cysts of the Adult can mimic what other type of lesion?
May mimic mucocele, BUT they are found on ATTACHED gingiva
Histological features of Gingival Cysts of the Adult:
a cystic cavity lined by a thin, uniform layer of cuboidal or attenuated non-keratinized stratified squamous epithelium
what is the definition for Lateral Periodontal Cysts?
from what structure do they arise?
a developmental cyst occurring adjacent or lateral to the root of a tooth
probably arising from intrabony rests of dental lamina
T/F: Teeth adjacent to a Lateral Periodontal Cyst are usually non-vital
FALSE
they are usually vital
In what areas are Lateral Periodontal Cysts usually found?
what population groups are at risk for developing them?
A) found in mandibular premolar area, maxillary lateral incisor region
B) Peak incidence in the 5th and 6th decades
radiographic findings for Lateral Periodontal Cysts:
Asymptomatic unilocular radiolucency, lateral root surface of vital tooth
Typically less than 1 cm in diameter
Histology of Lateral Periodontal Cysts:
thin non-keratinized stratified squamous epithelium lining, uninflamed fibrous connective tissue
Often identical to gingival cyst of the adult
what is the treatment/prognosis for Lateral Periodontal cysts?
Tx: Curettage
Prognosis: Excellent
______________ are also known as Gorlin Cysts
Calcifying Odontogenic Cyst
where are Calcifying Odontogenic cysts usually found?
In what population groups are they usually found?
Equal distribution between maxilla and mandible; anterior > posterior jaws
May occur at any age, with peak occurrence in second and third decade (mean age - 33 years)
Radiographic appearance of Calcifying Odontogenic Cysts:
A) Usually a well-defined, unilocular radiolucency
B) Scattered radiopacities in about 50% of cases
what % of Calcifying Odontogenic cysts are associated with impacted teeth? Odontomas?
what % are associated with root resorption?
A) 30% of COC’s are associated with an impacted tooth,
B) 20% with odontoma
C) resorption of adjacent tooth roots common (~ 80% of cases)
histological characteristics of Calcifying Odontogenic Cysts:
most are cystic
odontogenic epithelial cells which at their periphery show a cuboidal or columnar appearance of the basal cells, similar to ameloblastoma
Solid variants are recognized
As COC cells approach the lumen, they undergo a process termed “_______” change
“ghost cell”
- Cells are pale and eosinophilic, with swollen cytoplasm and loss of the nucleus
what is the treatment/prognosis for Calcifying Odontogenic Cysts?
A) Treatment consists of enucleation with curettage
B) Recurrence is not common, but does occur, so follow-up is recommended
T/F: both gingival cysts of the adult, and lateral periodontal cysts, arise from dental lamina rest cells
TRUE
Gingival cysts- rest cells trapped in Gingival CT
Lateral periodontal- rest cells trapped within bone (intrabony)
Roughly ______% of calcifying odontogenic cysts are found in the gingival soft tissue
5-17%
