Is the Vermillion zone Keratinized?
Is the Vermillion zone Keratinized?
It is a thinly keratinized layer of stratified squamous epithelium deeply penetrated by well-vascularized dermal papillae which impart the typical red appearance of the lips.
What epithelium is associated with the vermilion zone of the lips?
Vermilion: The red part of the lips (Fig. 1). It is covered with a specialized stratified squamous epithelium, which is in continuity with the oral mucosa of the gingivolabial groove.
Are lips Keratinized?
The external covering of the lip is keratinized stratified squamous epithelium. Note also the numerous hair follicles. As the epithelium approaches the so-called red area of the lip, the epithelium becomes non-keratinized stratified squamous epithelium.
Is the tongue Keratinized?
The dorsal surface of the tongue is also keratinized, but it is referred to as specialized mucosa because of the presence of papillae. The dorsum of the tongue, the hard palate, and the gingival tissues are keratinized to better respond to masticatory demands.
Is oral epithelium Keratinized?
Oral gingival epithelium is keratinized while the sulcular and junctional epithelia (JE) as well as the lining mucosa are not keratinized (14).
What is the Keratinized epithelium?
Keratinized epithelium has keratin deposited on the surface which makes it impermeable and dry. Examples of keratinized stratified squamous epithelium include skin, epidermis of the palm of the hand and sole of the foot, and the masticatory mucosa.
What is the Vermilion?
The vermilion is the white roll that forms the border between the lip and surrounding skin (see the image below). This area is the focus of repair because even 1 mm of vermilion misalignment may be noticeable. Illustration of the upper and lower vermilion border.
What is Keratinized oral epithelium?
In keratinized oral mucosa, the epithelium is composed of the four layers stratum basale, stratum spinosum, stratum granulosum, and stratum corneum. Specialized mucosa is located on the dorsum of the tongue, shows a keratinized epithelium and includes lingual papillae and taste buds as specialized structures (2).
What oral tissue is Keratinized?
What is Keratinized squamous epithelium?
Keratinized stratified squamous epithelium is a type of stratified squamous epithelium in which the cells have a tough layer of keratin in the apical segment of cells and several layers deep to it.
Where is the Keratinized squamous epithelium present?
What kind of stain is the vermilion zone?
(Iron hematoxylin/alcian blue stain) 100x, 10x The vermilion zone, the red portion of the lip, is covered by a keratinized stratified squamous epithelium that lacks hair follicles. The epithelium in this region is thicker than the epithelium of the skin and a stratum granulosum is present, indicating that the epithelium is keratinized.
What makes up the vermilion zone of the lip?
The vermilion zone is lined by a thick keratinized, stratified squamous epithelium and hair follicles are lacking. The numerous, densely packed dermal papillae of the lamina propria allow blood vessels close access to the surface, imparting a red color to this zone. The image on the right shows these details at higher magnification 100x, 400x
Why does the vermilion border have no sweat glands?
The vermilion border represents the change in the epidermis from highly keratinized external skin to less keratinized internal skin. It has no sebaceous glands, sweat glands, or facial hair. There are two reasons that the border appears red in some people: The epithelium is thin and therefore the blood vessels are closer to the surface.
What is the structure of the vermilion border?
Structure. It has been described as a pale, white rolled border and also as being a red line. This fine line of pale skin accentuates the colour difference between the vermilion and normal skin. Along the upper lip, two adjacent elevations of the vermilion border form the Cupid’s bow.