The periodontal ligament is a soft, dense, fibrous connective tissue 0.2 mm wide, which contains cells associated with the development and maintenance of alveolar bone (osteoblasts and osteoclasts) and of cementum (cementoblasts and odontoclasts).
What makes up the periodontal ligament?
The PDL consists of principal fibers, loose connective tissue, blast and clast cells, oxytalan fibers and Cell Rest of Malassez. The primary principal fiber group is the alveolodental ligament, which consists of five different fiber subgroups.
What are the periodontal ligament fibers?
The periodontal ligament, commonly abbreviated as the PDL, is a group of specialized connective tissue fibers that essentially attach a tooth to the alveolar bone within which it sits. It inserts into root cementum one side and onto alveolar bone on the other.
What is periodontal ligament in teeth?
The periodontal ligament, commonly known as the PDL, is a soft connective tissue between the inner wall of the alveolar socket and the roots of the teeth. It consists of collagen bands (mostly type I collagen) connecting the cementum of teeth to the gingivae and alveolar bone.
What cell type is most frequently found in the periodontal ligament?
Background: Fibroblasts are the predominant cells of the periodontal ligament (PL) and have important roles in the development, function, and regeneration of the tooth support apparatus.
What are ligaments?
A ligament is a fibrous connective tissue that attaches bone to bone, and usually serves to hold structures together and keep them stable.
What is fenestration and dehiscence?
Fenestration is the condition, in which the bony coverage of the root surface is lost, and the root surface is only covered by the periosteum and gingiva. In such lesions, marginal bone is intact. When this bone defect spreads toward the marginal bone, it is called dehiscence.[1]
What is the name for the periodontal ligament fibers that are embedded in cementum and bone?
Sharpey fibers are portions of the principal collagen fibers of the periodontal ligament embedded in cementum and alveolar bone to attach the tooth to the alveolus (Fig. 1.28).
What are Sharpey’s fibers?
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. … Each fibre is accompanied by an arteriole and one or more nerve fibres.
What are the functions of the periodontal ligaments quizlet?
14- Periodontal ligament. Functions: help tooth withstand the compressive forces during chewing and remain embedded in the alveolar bone; serves as a source of proprioception, or sensory innervation, so the brain can detect the forces being placed on the teeth. You just studied 24 terms!
Are there ligaments in your teeth?
Ligaments hold your teeth in place. These connective tissues act as shock absorbers to cushion your teeth from everyday use. With too much pressure, they can become sprained, damaged, and inflamed.
Are there ligaments in your gums?
The periodontal ligament is only found between the tooth root and adjacent bone and does not support the outer gum tissues. The complex nature of the PDL tissue allows the tooth to properly function during chewing and to withstand the pressure from grinding or clenching.
What is periodontal ligament widening?
Periodontal ligament widening can be a finding which can present on OPG and facial bone CT imaging and can occur in several situations. The normal width range is usually between 0.15-0.21 mm (may decrease with age). Conditions associated with widening are varied and can include: trauma. occlusal trauma.
What is the shape of periodontal ligament?
We have shown that PDLFs have a flat shape with long processes or a wing-like shape, while PDL bundles are a multiple-branched structure wrapped in thin sheets of PDLF cytoplasm. Furthermore, PDLFs form an extensive cellular network between the cementum and alveolar bone.
What structures will the periodontal ligament attach to either side?
The periodontal ligament, which is often referred to as the PDL, is a group of specialized connective tissue fibers which attach the tooth to the alveolar bone. On one side, it inserts into the root cementum and it inserts into the alveolar bone on the other.
How does the periodontal ligament perform demonstrate its supportive function?
Supportive function
It has been shown that because the forces during mastication are applied in different directions, both compression and tension areas exist in PDL during a regular loading scheme 306. The mechanical strength of PDL is derived from collagen Type I fibers 316.