Pathology periapical cysts

What is apical periodontitis?

Which of these are common causes of apical periodontitis?

Clinical features of acute apical periodontitis: Tooth [blank_start]elevated[blank_end] in socket [blank_start]Tenderness[blank_end] on biting [blank_start]Severe[blank_end] pain Thermal change [blank_start]does not[blank_end] induce pain

What is a radiographic feature of acute apical periodontitis?

Histological features of acute apical periodontitis: Vascular [blank_start]dilation[blank_end] O[blank_start]edema[blank_end] [blank_start]PMNL[blank_end] infiltration [blank_start]Resorption[blank_end] of surrounding [blank_start]bone[blank_end] if irritant not removed If associated with [blank_start]bacterial[blank_end] infection, [blank_start]acute alveolar abscess[blank_end]

Chronic apical periodontitis is the most common sequelae of

Clinical features of chronic apical periodontitis: T[blank_start]ender to percussion[blank_end] ([blank_start]dull[blank_end] sound) Mild pain on [blank_start]biting[blank_end] [blank_start]Elongation[blank_end] in socket Can be a[blank_start]symptomatic[blank_end]

Radiographic features of chronic apical periodontitis: [blank_start]Thickening[blank_end] of the ligament at the root apex [blank_start]Radiolucent[blank_end] area attached to the root apex

Histological features of chronic apical periodontitis: Infiltration of m[blank_start]acrophages[blank_end]/l[blank_start]ymphocytes[blank_end]/plasma cells [blank_start]Granulation[blank_end] tissue [blank_start]Cholesterol[blank_end] crystals H[blank_start]aemosiderin[blank_end]

The epithelial lining of radicular cysts may be derived from: [blank_start]Epithelial[blank_end] cell rests of [blank_start]malassez[blank_end] [blank_start]Respiratory[blank_end] epithelium of the [blank_start]maxillary sinus[blank_end] Oral epithelium from a f[blank_start]istulous[blank_end] tract

What are some sequelae of chronic apical periodontitis?

What are some developmental odontogenic cysts?

What are some inflammatory odontogenic cysts?

Epithelial cell rests of serres give rise to...

Reduced enamel epithelium gives rise to...

Epithelial cell rests of serres give rise to odontogenic keratocysts and eruption cysts

Reduced enamel epithelium gives rise to eruption cyst, paradental cyst and dentigerous cyst

Epithelial cell rests of malassez are the source of all radicular cysts

Pocket radicular cysts are

True radicular cysts are

The cyst cavity of a radicular cyst develops from death of the [blank_start]central epithelial[blank_end] cells and [blank_start]liquefaction[blank_end] necrosis of the [blank_start]granulation[blank_end] tissue.

Clinical features of radicular cysts: Majority are [blank_start]asymptomatic[blank_end] N[blank_start]on-vital[blank_end] Sensitive to [blank_start]percussion[blank_end] [blank_start]Maxillary[blank_end] anteriors most commonly affected

Histological features of radicular cysts: [blank_start]Stratified squamous[blank_end] epithelial lining [blank_start]Cholesterol[blank_end] crystals Plasma cell and [blank_start]lymphocyte[blank_end] infiltration [blank_start]Rushton[blank_end] bodies Epithelial mucus [blank_start]metaplasia[blank_end]

Contents of a radicular cyst: [blank_start]Serum[blank_end] proteins I[blank_start]mmunoglobulins[blank_end] [blank_start]Cholesterol[blank_end] crystals W[blank_start]ater[blank_end]

What type of molecule breaks down bone matrix to make room for cyst expansion?

A radicular cysts lumen is [blank_start]hypertonic[blank_end] when compared to the inflammatory exudate. This means breakdown products in the inflammatory exudate travel into the [blank_start]cyst lumen[blank_end] which draws more water in, leading to further [blank_start]expansion[blank_end].

Which molecules are important in bone resorption

Features of residual cysts are: [blank_start]Dense[blank_end] connective tissue Retained after [blank_start]tooth extraction[blank_end] [blank_start]Stratified[blank_end] epithelium

Condensing osteitis leads to dense s[blank_start]clerotic[blank_end] bone being deposited around the root apex due to low grade [blank_start]inflammation[blank_end]. Radiographic features include radio[blank_start]paque[blank_end] mass surrounding the [blank_start]apex[blank_end] of the root(s). The periodontal ligament is also [blank_start]widened[blank_end]. Histological features include dense bony t[blank_start]rabeculae[blank_end] with little [blank_start]interstitial[blank_end] marrow tissue.

In periapical cemental d[blank_start]ysplasia[blank_end] [blank_start]cemento[blank_end]-osseous tissue replaces bone. It most commonly occurs in the anterior [blank_start]mandible[blank_end].

The three stages of periapical cemental dysplasia are: Osteo[blank_start]lytic[blank_end] Cemento[blank_start]blastic[blank_end] M[blank_start]ature[blank_end]

Acute alveolar abscess is a [blank_start]supparative[blank_end] process following on from [blank_start]acute or chronic[blank_end] periapical periodontitis. It causes initial t[blank_start]enderness[blank_end] of the tooth which goes on to become extremely painful. Radiographic features including slight [blank_start]thickening[blank_end] of the periodontal ligament space Histological features include: Disintegrating [blank_start]PMNL[blank_end]s C[blank_start]ellular[blank_end] debris N[blank_start]ecrotic[blank_end] material Bacterial c[blank_start]olonies[blank_end] V[blank_start]asodilation[blank_end]