What is the lamina propria in the oral mucosa?
The lamina propria is a fibrous connective tissue layer that consists of a network of type I and III collagen and elastin fibers in some regions. The main cells of the lamina propria are the fibroblasts, which are responsible for the production of the fibers as well as the extracellular matrix.
What are the layers of the oral mucosa?
In keratinized oral mucosa, the epithelium is composed of the four layers stratum basale, stratum spinosum, stratum granulosum, and stratum corneum.
What are the three types of oral mucosa?
Histologically, the oral mucosa is classified into three categories, lining, masticatory, and specialized.
What is the histology of the oral mucosa?
Histologically, the oral mucosa is formed by three layers, a surface squamous stratified epithelium, known as the oral epithelium, whose thickness and degree of keratinization depend on the location and functional requirements [1].
What is lamina propria and its function?
Lamina propria is loose connective tissue in a mucosa. Lamina propria supports the delicate mucosal epithelium, allows the epithelium to move freely with respect to deeper structures, and provides for immune defense.
What is found in the lamina propria?
The lamina propria is composed of noncellular connective tissue elements, i.e., collagen and elastin, blood and lymphatic vessels, and myofibroblasts supporting villi. However, the main characteristic of the lamina propria is to contain numerous immunologically competent cells as well as nerve endings.
What is alveolar mucosa?
Alveolar mucosa is the soft, thin mucous membrane that sits above the marginal gingiva and the attached gingiva, and continues across the floor of the mouth, cheeks, and lips.
What is the difference between the lamina propria and the submucosa?
The mucosa consists of the epithelium itself and also the supporting loose connective tissue, called lamina propria, immediately beneath the epithelium. Deeper connective tissue which supports the mucosa is called the submucosa. Lamina propria is unspecialized.
What is gingiva?
(JIN-jih-vuh) The tissue of the upper and lower jaws that surrounds the base of the teeth. Also called gums.
What is the lamina propria trachea?
The wall of the trachea is composed of a mucosa, submucosa, cartilaginous layer, and adventitia. The lamina propria of the mucosa contains many elastic fibers, lymphoid tissue in diffuse patches, and occasional small nodules. This muscle is smooth muscle and attaches to the free ends of the cartilage rings.
Why is attached gingiva important?
Historically, the presence of a wide zone of attached gingiva has been considered beneficial, as the gingiva plays an important role in maintaining the periodontium in health. It provides a physical barrier to oral biofilm, dissipates masticatory forces and protects the periodontium from injury.