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okc

Nancy Alsharu Inglês 31 flashcards

this type of cyst has a remarkable growth pattern its greater than any other odontogenic cyst its so large that it can…

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1this type of cyst has a remarkable growth pattern its greater than any other odontogenic cyst its so large that it can cause massive bone destructionodontogenic keratocyst
2how is OKC discovered radiographically ?accidentally
3clinical feautures which appears as a single lesion ,multiple okc that occupy all 4 quadrants of the jawclincial feaututres of OKC
4multiple okc is a feauture ofnevoid basal cell carcinoma or gorlin goltz syndrome
5Multiple OKC of jaws. Multiple Basal cell carcinoma of skin. Bifid ribs & vertebral deformities. Calcification of Falx cerebri. Palmer & planter dyskeratosis. Frontal bossing. Hypertelorism. Ovarian fibromas.the predominant feautures of nevoid basal cell carcinoma
6Well-defined solitary lesion or as multilocular/polycystic radiolucencies exhibiting a thin corticated margin.RG of okc
7A thin, uniform lining of parakeratinized squamous epith. (6-10 cells in thickness). A palisaded layer of colouminar or cuboidal basal cells. Corrugated layer of parakeratin on its luminal surfaces. Lack of rete pegs.The microscopic appearance of
OKC
8Focal separation of epithelial lining from the adjacent C.T which is often loose & fibrillar & usually free of inflammation. The cystic lumen contains variable amount of desequamated parakeratin & gray /white cheesy materials consisting of keratinous debris. Remanant of dental lamina, microcyst formation, satellite "daughter" cyst present in capsule wall. Epithelial budding from basal cell area.microscopic feautures of okc
9what are the differential diagnosis of okcDentigerous cyst
Ameloblastoma
Odontogenic myxoma
Non-odontogenic lesions eg. central giant cell granuloma
10the treatment of okcsurgical enucleation
11mention the 6 pathogenic expansions of okc1- hydrostatic pressure
2-keratocyst contents
3-active epithelial growth
4-mural squames
5-bone resorption factors
12similar to gingival cyst clinically but arise in canine and pm of mandible of teenagersclinical feauture of lateral periodontal cyst
13clearly in this RG you can see a bony expansion in the pm or canine regionRG of lateral peridontal cyst
14the cyst lining is of non keratinized squamous epithelium originlateral periodontal cyst
15pathogenesis could arise as a lateral dentigerous cyst that unknownly can be retained in the bone when tooth eruptsfrom where does the pathogenesis of lateral periodontal cyst arise
16how do you treat lateral periodontal cystenuculation
recurrence rate is uncommon
17the gingival cyst of adults is on the site of pm or canine but it can happen both buccaly on the mandible or the maxilla its a firm but compressible fluid filled swellinghow does he site of lateral periodontal and gingival cyst of adults differ
18radiographically no appearance sometimes there is saucerization of the bonehow is the rg of the laterl periodntal cyst different from the gingival cyst of adults
19no difference histologically similar to lateral pdl cysthow does laterl pdl cyst and gingival cyst of adults differ
20enucleationtreatment of gingival cyst of adults
21the gingival cyst of aduts differ from the gingival cyst of newborn histologically is that its composed of a cyst lined with keratinized producing epitheliumdifference histologically bwn gingival cyst of adults and dental lamina cyst of newborns
22no treatment is requiredhow do you treat the dental lamina cyst of newborn
23uncommon raised soft tissue nodule on edentulous alveolar ridgeDental lamina cyst of newborn
24clinically its eaither large solitary or multiocular odontogenic cyst derived from dental laminaglandular cyst epithelum
251-uniform thickness of squamous epithelim and instead of being stratified squamous just like in lateral pdl or gingival cyst its lined by single layer of cuboidal or columnar cells lining the glandular structure 2- variable number of small glandular structures of microcyst in the lining epithelium 3- just like intestine the glandular cyst epithelim is going to have goblet like mucous secreting cellshistological feautures of glandular cyst epithelium
26seen in children and teens in the molar-pm region of the mandible and are asymptomaticsolitary bone cyst
271- rough bony walled cavity devoid of soft tissue 20 cavity is empty or with clear or blood 3- rapid healing after surgical explorationsurgical exploration of solitrary bone cyst
28Radiolucency of variable size & irregular outline. Scalloping which is a prominent feature especially around & between roots of standing teeth. The margins of the lesion are well-defined.rg of solitary bone cyst
29Radiolucency of variable size & irregular outline. Scalloping which is a prominent feature especially around & between roots of standing teeth. The margins of the lesion are well-defined.Lack of epithelial lining therefore it is not a true cyst Fibrous connective tissue with occasional chronic inflammatory cells lining the bone cavity Empty or fluid filled cavityhistological feautures of solitary bone cyst
30Uncertain, but possible relationship to trauma in 50% of cases. Trauma may produce intramedullary hemorrhage which for unknown reasons fails to organize & that cavitation occurs by subsequent hemolysis & resorption of clot.pathogenesis of solitary bone cyst
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