Odontogenic C y s t s Flashcards
(32 cards)
Radicular Cysts?
الانتشار
منشأة
أسبابه النظريات
اسماء اخري
Most common cyst of the jaw.
Epthielial rests of Malessez
1- Nutritional Deficiency theory
3-Merging of Epithelial Strand theory
3-Abscess theory
Apical Cyst. Periapical Cyst)
Radicular Cysts?
العمر
اماكن
Age :3 to 6 decades .
- Maxilla more than mandible
in the following orders:
Maxillary anterior ,
Maxillary posterior ,
Mandibular posterior , then anterio
What are the radiographic features of Radicular Cysts?
الجامع
Well defined
radiolucency
With radio opaque margin
The adjacent teeth can be
displaced but rarely
resorbed
What are the histopathologic features of the epithelial lining of a Radicular Cyst
Non keratinized stratified squamous
epithelium
Cholesterol clefts be present.
Multinucleated foreign-body giant cells may be seen
Lipid filled macrophages (foam cells
Rushton bodies(hyaline,eosinophil)
What is a Paradental Cyst?lateral
اسبابه
مكانه
Develops on the lateral surface of a tooth root. It results from inflammation of the gingiva
over an erupting molar and is associated with partially impacted 3rd
What is a Buccal Bifurcation cyst?
المنشأ
المكان
العمر
develops on the buccal aspect over the furcation
mandibular first permanent molar
It originates from a buccal pocket or tooth with ectopic enamel.
Children
What is the origin of a Dentigerous Cyst?
الانتشار
منشأه
It is the second most common odontogenic cyst .
- Most common developmental cyst.
proliferation
of the reduced enamel epithelium.
separation of the follicle from
around the crown of an unerupted tooth
What is the origin of a Dentigerous Cyst?
العمر
اللون البشره
المكان
2،3 decades.
whites than for blacks.
Upper canine lower8
What is the origin of a Dentigerous Cyst?
Exry
Well defined unilocular radiolucent area that is associated
with crown of an unerupted tooth.
• If infected, the border may be ill defined.
• A large cyst ((multilocular radiolucency ))
ongstanding cysts teeth))
((resorption of adjacent erupted
What are the histopathologic features of the epithelial lining of a Dentigerous Cyst?
non keratinized stratified squamous
cholesterol crystals are common.
Small islands or cords of inactive تتحول
odontogenic tumors.
للأورام م ameloblastoma م
odontogenic epithelial rests
may be present connective tissue wall.
mucous cells and Rarely, ciliated columnar cells
are present.
What happens to the histopathologic features of a Dentigerous Cyst in cases of inflammation
ومضاعفاته (اورام ممكن تطلع منه )
Epithelial hyperplasia
• Developments of rete ridges
ameloblastoma.
mucoepidermoid carcinoma
a squamous cell carcinoma
What is an Eruption Cyst?
soft tissue analogue of the dentigerous cyst that occurs within the gingiva
eruption hematomas)في ال
Eruption Cyst اي هي ؟
Surface trauma results in bleeding in the cystic fluid
giving it a purplish
Eruption Cyst
عمر
مكان
Most of cases are seen in children younger
than 10 years.
erupting tooth, the lesion is most commonly
associated with the first permanent molars and the
maxillary incisors.
Eruption Cyst Histologic features:
• Lamina propria shows a
variable inflammatory cell
infiltrate because of exposure
to trauma.
• A deep portion formed of a thin
non keratinizing squamous
epithelial lining
What is an Odontogenic Keratocyst (OKC)
بيتكون من اي
العمر
المكان
Six
cell rests of the dental lamina
old age (10-40 years old ).
Mandible > maxilla . Body of the mandible, posterior
region and ascending ramu
Female مش مذكروه في البلور بس مهم 🫡
What are the signs and symptoms of an Odontogenic Keratocyst
الامتداد
الخاصيه هل هو لوحده ام معاه حاجه تانيه
antero-
posterior direction and can
reach large sizes without causing obvious bony
The majority of keratocysts present as a solitary cysts.
Multiple cysts are associated with the Nevoid basal cell
carcinoma syndrome (Gorlin Goltz syndrome
What are the histopathological features of an Odontogenic Keratocyst
ولو التهب
parakeratinized
epithelial lining
clear liquid or cheesy
material
(keratinous debris)
Small satellite cysts, cords, or islands of odontogenic
epithelium
f the cyst become infected, inflammatory changes take
place as:
- Para → ortho-keratinization
- Epithelial proliferation &Rete processes develop.
What are the complications of an Odontogenic Keratocyst?
معدل الرجوع
Ameloblastic transformation
Recurrence – high rate of recurrence.
What is a Calcifying Odontogenic Cyst (COC), also known as Gorlin Cyst?
مكانه
الأورام المرتبطة بيه
majority of lesions are central COC (within bone of jaw,
intraosseous). Less commonly, peripheral lesions may be
seen (located on gingival tissues,
anterior regions of jaws, incisor /
commonly odontoma
What are the clinical features of Calcifying Odontogenic Cysts
Ex ray
unilocular or multilocular
radiolucent area containing varying
number of radiopaque structures
within the lesion, either irregular
calcifications or tooth like densities.
without root resorption
What are the clinical features of Calcifying Odontogenic Cysts
الهستو
Cystic cavity lined with Od. Epi.
With well defined basal cell
layer.
stellate reticulum like
cells.
Ghost Cells may be seen in
thicker areas
keratinization and frequently
calcify.
What are the clinical features of a Lateral Periodontal Cyst?
المنشأ
العمر
المكان
From rests of the dental lamina.
6th decade.
Lateral PDL regions of mandibular,
premolars
Associated teeth are vital
What are the histopathological features of a Lateral Periodontal Cyst?
nonkeratinized st. sq. epi.
Presence of area of thickenings of the epithelial lining
