Which group of the principal fibers of the periodontal ligament runs perpendicular from the alveolar bone to the cementum and resists lateral forces?

Alveolar crest fibers: Extend from the cervical cementum of the tooth to the alveolar crest. Their function is to counterbalance the occlusal forces on the more aplical fibers and resist lateral movements.

What is the function of PDL?

Structure of the Oral Tissues The PDL is a highly specialized connective tissue situated between the tooth and the alveolar bone (Figure 1-5). The principal function of the PDL is to connect the tooth to the jaw, which it must do in such a way that the tooth will withstand the considerable forces of mastication.

What are the four gingival fiber groups?

At least six of these gingival fiber groups insert into the cementum of the natural tooth: the dentogingival (coronal, horizontal, and apical), dentoperiosteal, transseptal, circular, semicircular, and transgingival fibers.

What periodontal ligament fibers are only found surrounding a Multirooted tooth?

The alveolodental ligament is the primary principal fiber group. The alveolodental ligament consists of five different fiber subgroups which include: alveolar crest, horizontal, oblique, apical and interradicular on multirooted teeth.

What are the principal fibres of PDL?

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.

Which fibers extend from cementum to alveolar bone?

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 the function of alveolar bone?

Alveolar bone is that part of the maxilla and mandible which supports the teeth by forming the “other” attachment for fibres of the periodontal ligament (Fig. 1.148).

What is PDL in dentistry?

Introduction. 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 are the gingival fibers?

The gingival fibers are the connective tissue fibers found in the gingival tissue next to the teeth. They help hold the gum tissue firmly against the teeth. They primarily consist of type I collagen, but type III fibers are also involved.

What are the types of gingiva?

There are two types of gingivae that are clearly recognizable and they are known as the marginal gingiva that is mobile, and the attached gingiva.

Where are Sharpey’s fibers found?

In the teeth, Sharpey’s fibres are the terminal ends of principal fibres (of the periodontal ligament) that insert into the cementum and into the periosteum of the alveolar bone.

Which periodontal ligament fibers support the tooth in its socket?

The periodontal ligament, which is often abbreviated as the PDL, is a group of specialized connective tissue fibers that attach the tooth to the alveolar bone. The PDL inserts into root cementum on one side and onto alveolar bone on the other.

Which is the principal fiber group of the PDL?

Which is the principal fiber of the periodontal system?

The main principal fiber group is the alveolodental ligament, which consists of five fiber subgroups: alveolar crest, horizontal, oblique, apical, and interradicular on multirooted teeth. Principal fibers other than the alveolodental ligament are the transseptal fibers.

How are oxytalan fibers unique to the PDL?

Oxytalan fibers are unique to PDL and are naturally elastic. It inserts into the cementum and runs in two different directions; parallel to the root surface and oblique to the root surface. The PDL substance is estimated to contain up to 70% water. It is thought to have a significant effect on the tooth’s strength and ability to withstand stress.

Which is the principal fiber of the alveolodental ligament?

Alveolodental ligament. The main principal fiber group is the alveolodental ligament, which consists of five fiber subgroups: alveolar crest, horizontal, oblique, apical, and interradicular on multirooted teeth. Principal fibers other than the alveolodental ligament are the transseptal fibers.