WHO classification odontogenic cysts 2005?

In 2005 the WHO reclassified odontogenic keratocyst (OKC) as a neoplasm and recommended keratocystic odontogenic tumor (KCOT) as the appropriate designation.

WHO classification odontogenic cysts PPT 2017?

7/25/2017 Classification of odontogenic cyst/Dr. Muthukumaran/ sixth seminar 16 Pindborg & kramer– 1971 : ODONTOGENIC CYSTS Developmental: Primordial cyst(keratocyst) Gingival cyst Eruption cyst Dentigerous (follicular) cyst Inflammatory: Radicular cyst. THEY TALK ABOUT ONLY THE ODONTOGENIC CYST.

What is cyst describe its classification?

A cyst is a uni- or multilocular, epithelium-lined cavity of various etiologies that contains liquid or gaseous materials. Non-epithelium-lined cavities are classified as “pseudocysts”. In clinical practice, both pseudocysts and cysts are generally referred to as “cysts”.

WHO classification calcifying odontogenic cyst?

The World Health Organization classified (2005) COC as a neoplasm and used the term calcifying cystic odontogenic tumor for benign cystic type, the dentinogenic ghost cell tumor for the benign solid type lesions which occur centrally or peripherally, and the malignant one as ghost cell odontogenic carcinoma.

What is Gorlin cyst?

The calcifying cystic odontogenic tumor (CCOT), also known as calcifying odontogenic cyst (COC) or Gorlin cyst is a rare developmental lesion which arises from odontogenic epithelium. Although the lesion has been commonly recognized as a benign odontogenic cyst since Gorlin et al.

Who OKC definition?

OKC is the one of the rare odontogenic cysts, which attracts many researchers due to its unique characteristics. OKC originates from the dental lamina remnants in the mandible and maxilla before odontogenesis is complete. It may also originate from the basal cells of overlying epithelium.

What is Orthokeratinized odontogenic cyst?

Orthokeratinized Odontogenic Cyst (OOC) is a rare, developmental odontogenic cyst which was considered in the past to be a variant of Odontogenic keratocyst (OKC) later renamed as keratocystic odontogenic tumor (KCOT).

What is calcifying odontogenic cyst?

The calcifying odontogenic cyst (COC) was first delineated in 1962. It is a rare developmental odontogenic cyst with notable presence of histopathological features which include a cystic lining demonstrating characteristic “Ghost” epithelial cells with a propensity to calcify.

What is a glandular odontogenic cyst?

Glandular odontogenic cyst (GOC) is a rare and uncommon jaw bone cyst of odontogenic origin described in 1987 by Gardener et al. as a distinct entity. It is a cyst having an unpredictable, potentially aggressive behavior, and has the propensity to grow in large size with relatively high recurrence rate.

What is Paradental cyst?

The paradental cyst is an odontogenic cyst of inflammatory origin, which occurs on either the buccal, distal, or (rarely) mesial aspects of partially erupted mandibular third molars. In most cases there is an associated history of recurrent pericoronitis. The clinicopathologic features of 50 cases are reviewed.

What is Orthokeratinized odontogenic cyst?

Orthokeratinized Odontogenic Cyst (OOC) is a rare, developmental odontogenic cyst which was considered in the past to be a variant of Odontogenic keratocyst (OKC) later renamed as keratocystic odontogenic tumor (KCOT).

What is the difference between odontogenic and Nonodontogenic cyst?

Odontogenic cysts arise from remnants of the odontogenic epithelium entrapped in bone or gingival tissue, while non-odontogenic cysts develop from epithelium of non-odontogenic origin.

What is odontogenic cyst?

Odontogenic cysts are epithelial-lined pathologic cavities and surrounded by fibrous connective tissue that originate from odontogenic tissues that occur in tooth-bearing regions of maxilla and mandible. Cystic conditions of the jaw cause bony destruction and may cause resorption or displacement of adjacent teeth.

What is the difference between Parakeratinized and Orthokeratinized?

In the orthokeratinized epithelium the cell nuclei disappear in the keratinized layer, whereas in the parakeratinized epithelium flattened, highly condensed nuclei remain in the cell cytoplasm of the keratinized layer until exfoliation.

What is calcifying odontogenic cyst?

The calcifying odontogenic cyst (COC) was first delineated in 1962. It is a rare developmental odontogenic cyst with notable presence of histopathological features which include a cystic lining demonstrating characteristic “Ghost” epithelial cells with a propensity to calcify.

What is Orthokeratinized?

Orthokeratinized epithelium is the least common form of epithelium found in the oral cavity. It is associated with the masticatory mucosa of the hard palate and the attached gingiva. It is also associated with the specialized mucosa of the lingual papillae on the dorsal surface of the tongue.

What are the 3 types of mucosa?

Mucosa has three layers:
  • Epithelium. The epithelial layer is the surface layer of the mucosa. …
  • Lamina propria. The epithelium attaches to a loose connective tissue called the lamina propria. …
  • Muscularis mucosae. The deepest layer of the mucosa is the muscularis mucosae, a layer of smooth muscle.

What is Parakeratin and Orthokeratin?

The major difference between orthokeratinized and parakeratinized is the most superficial heap is still being used or lost. These cells of the keratin layer bears not only keratin but also nuclei, disparate orthokeratinized.

What is Keratinized and Nonkeratinized?

Keratinized epithelium forms the epidermis of land vertebrates. Nonkeratinized epithelium lines the buccal cavity, esophagus and pharynx. The surface cell layer of keratinized epithelium consists of dead cells and forms an effective barrier. Moreover, it is impervious to water.

What kind of mucosa is tongue?

masticatory mucosa
Because the dorsum of the tongue actively participates in mastication, this mucosa is sometimes also classified as masticatory mucosa. Four layers form the oral epithelium in keratinized oral mucosa, which is the case of the masticatory mucosa.

Are lips Keratinized?

The external covering of the lip is keratinized stratified squamous epithelium.