Fibrils are structural biological materials found in nearly all living organisms. Not to be confused with fibers or filaments, fibrils tend to have diameters ranging from 10-100 nanometers. Fibrils are not usually found alone but rather are parts of greater hierarchical structures commonly found in biological systems. Due to the prevalence of fibrils in biological systems, their study is of great importance in the fields of microbiology, biomechanics, and materials science.
The substantia propria is fibrous, tough, unyielding, and perfectly transparent.
Collagen alpha-1 (XXVII) chain (COL27A1) is a protein that in humans is encoded by the COL27A1 gene.
Calcifying odotogenic cyst is a benign odontogenic tumor of cystic type most likely to affect the anterior areas of the jaws. It is most common in people in their second to third decades but can be seen at almost any age. On radiographs, the calcifying odontogenic cyst appears as a unilocular radiolucency. In one-third of cases, an impacted tooth is involved. Microscopically, there are many cells that are described as "ghost cells", enlarged eosinophilic epithelial cells without nuclei.
The glandular odontogenic cyst is a rare odontogenic cyst. In 85% of cases, it is found in the mandible, especially in anterior areas. It is more common in adults in their fifth and sixth decades. On radiographs, it can appear as a unilocular or multilocular radiolucency. Since the glandular odontogenic cyst can range in size, treatment can be as simple as enucleation and curettage to en bloc resection of the affected jaw.
The adenomatoid odontogenic tumor is an odontogenic tumor arising from the enamel organ or dental lamina.
Squamous odontogenic tumors (SOTs) are very rare benign locally infiltrative odontogenic neoplasms of epithelial origin. Only some 50 cases have been documented. They occur mostly from 20-40 and are more common in males. Treatment is by simple enucleation and local curettage, and recurrence is rare.
The odontogenic myxoma is an uncommon benign odontogenic tumor arising from embryonic connective tissue associated with tooth formation. As a myxoma, this tumor consists mainly of spindle shaped cells and scattered collagen fibers distributed through a loose, mucoid material.
The globulomaxillary cyst is a cyst that appears between a maxillary lateral incisor and the adjacent canine. It exhibits as an "inverted pear-shaped radiolucency" on radiographs, or X-ray films.
Type II collagen is the basis for articular cartilage and hyaline cartilage, formed by homotrimers of collagen, type II, alpha 1 chains.
Type-V collagen is a form of fibrillar collagen associated with classical Ehlers-Danlos syndrome. It is found within the dermal/epidermal junction, placental tissues, as well as in association with tissues containing Type-I collagen.
Collagen alpha-1(V) chain is a protein that in humans is encoded by the COL5A1 gene.
Collagen alpha-2(V) chain is a protein that in humans is encoded by the COL5A2 gene.
Collagen alpha-2(I) chain is a protein that in humans is encoded by the COL1A2 gene.
Collagen alpha-1(IX) chain is a protein that in humans is encoded by the COL9A1 gene.
Collagen alpha-1(XI) chain is a protein that in humans is encoded by the COL11A1 gene.
Collagen alpha-3(V) chain is a protein that in humans is encoded by the COL5A3 gene.
In medicine, desmoplasia is the growth of fibrous or connective tissue. It is also called desmoplastic reaction to emphasize that it is secondary to an insult. Desmoplasia may occur around a neoplasm, causing dense fibrosis around the tumor, or scar tissue (adhesions) within the abdomen after abdominal surgery.
