What is Dentogingival Junction?
Abstract. The dentogingival junction and periodontal ligament perform unique functions. The former makes a seal where a tooth punctures the integument; the latter, nominally a ligament, cushions the tooth during mastication, while sheltering the delicate cells which remodel the bony socket.
Is junctional epithelium Keratinized?
JE is classified as non-keratinized stratified squamous epithelium.
What are Dentogingival fibers?
dentogingival group – there are three types of fibers within this group: fibers that extend towards the crest of the gingiva. fibers that extend laterally to the outer surface of the gingiva and. fibers that extend outward, past the height of the alveolar crest, and then downward along the cortex of the alveolar bone.
Where is junctional epithelium from?
reduced enamel epithelium
Origin. The junctional epithelium comes from the reduced enamel epithelium (REE) during the development of the tooth. This occurs before the tooth erupts and after the enamel matures. The ameloblasts produce a basal lamina on the surface of the tooth which serves as a part of the primary EA.
Is attached gingiva Keratinized?
Attached gingiva – This tissue is adjacent to the free gingiva and is keratinized and firmly attached to the bone structure. It can range from 3-12 mm in height.
Is junctional epithelium stratified squamous?
The junctional epithelium, which is a non-keratinized stratified squamous epithelium, is located immediately apical to the sulcular epithelium.
What are Sharpey’s Fibres?
Sharpey’s fibres (bone fibres, or perforating fibres) are a matrix of connective tissue consisting of bundles of strong predominantly type I collagen fibres connecting periosteum to bone.
Why is Keratinized tissue important?
The most important function of keratinized tissue is thought to be protection as the oral mucosa forms a functional barrier from the oral environment. It is also important for sensation and patient comfort during tooth brushing.
What is the role of junctional epithelium?
Background and objective: The junctional epithelium provides the front-line defense against periodontal bacterial infection. The migration of neutrophils into the junctional epithelium might represent a protective reaction against bacterial infections.
What is junctional epithelium made of?
The junctional epithelium is found at the base of the gingival sulcus and, in a healthy sulcus, defines this base. The junctional epithelium is made up of mostly flattened epithelial cells that are layered on a basal membrane; only one layer is attached to this basal membrane, and the others adhere to one another.
What is the difference between sulcular and junctional epithelium?
The junctional epithelium (JE) lies immediately apical to the sulcular epithelium. The sulcular epithelium lines the gingival sulcus from the base to the free gingival margin. This is where it interfaces with the epithelium of the oral cavity.
What is Keratinized tissue?
Keratinized tissue, also known as keratinized mucosa, refers to the band of tissue surrounding your teeth at the point where they meet the gums. The word “keratinized” is used to describe cells that produce large amounts of a protein called keratin, making them strong and better at forming barriers.
Is marginal gingiva Keratinized?
Most of the gingiva is firmly attached to the supporting bone, with a slightly more mobile (usually non-keratinized) area, termed the free (marginal) gingiva, which is the prominent area close to the tooth.
Where can junctional epithelium be found?
gingival sulcus
The junctional epithelium (JE) is the epithelium that is located at the base of the gingival sulcus.
Where do Sharpey’s fibers come from?
Sharpey’s fibres (bone fibres, or perforating fibres) are a matrix of connective tissue consisting of bundles of strong collagenous fibres connecting periosteum to bone. They are part of the outer fibrous layer of periosteum, entering into the outer circumferential and interstitial lamellae of bone tissue.