The Periodontium

Flashcards about the periodontium.

Periodontium

Tissues that support the teeth

Gingival unit

Part of the periodontium composed of free gingiva, attached gingiva, and alveolar mucosa

Attachment unit (attachment apparatus)

Part of the periodontium composed of cementum, alveolar process, and periodontal ligament

Free gingiva

Gum tissue that extends from the gingival margin to the base of the gingival sulcus

Gingival papilla

Free gingiva located in the triangular interdental spaces

Lamina propria

Connective tissue fibers that intermingle with the fibers of the attached gingiva and the periodontal ligament

Attached gingiva

Gingiva that is not mobile and attached to the bone underneath

Rete peg formation

Irregular binding of the epithelium to bone by collagen fibers, causing stippling

Sharpey's fibers

Fibers embedded in the cementum or alveolar bone that keep the gingiva closely attached to the tooth

Alveolar mucosa

Covers the buccal surfaces of the mandibular and maxillary teeth and the lingual surfaces of mandibular teeth

Cementum

Hard, bonelike tissue covering the roots of teeth

Periodontal ligament

Tissue that surrounds the roots of the teeth and connects them to alveolar bone

Alveolar bone

Thin covering of compact bone that surrounds teeth

Cementoblasts

Cells that form cementum

Cellular cementum

Cementum with embedded cementoblasts

Acellular cementum

Cementum free of embedded cementoblasts

Alveolar bone proper

Lines the sockets in which the roots of teeth are held

Alveolus

Socket in which the tooth rests

Bundle bone

Forms the inner bone of the alveolus

Lamina dura

Attachment lining of bone around the tooth

Alveolar process

Surrounds and supports teeth in the maxilla and mandible

Cortical bone

Dense compact bone that surrounds the outside of the alveolar process

Trabecular bone

Softer cancellous bone that forms the inside of the alveolar process

Interdental bone or interdental septum

Trabecular bone located between teeth

Interradicular bone or interradicular septum

Trabecular bone located between roots

Basal bone

Main part of the maxilla and mandible that supports the alveolar process

Periodontal Ligament (PDL)

Tiny meshwork of collagenous connective fibers surrounding the tooth

Alveolar crest group

Group of periodontal ligament fibers that extend from the cervical area to the alveolar crest

Horizontal group

Group of periodontal ligament fibers that extend horizontally from tooth to alveolar bone

Oblique group

Group of periodontal ligament fibers that extend obliquely from tooth to bone

Apical group

Group of periodontal ligament fibers that extend apically from tooth to bone

Interradicular group

Group of periodontal ligament fibers located between roots of multirooted teeth

Gingival sulcus

Space facing sulcular gingiva

Dentogingival junction

Where the tooth surface meets the gingival tissue

Masticatory mucosa

Mucosa that makes up both free and attached gingiva

0.5 to 2 mm

The average depth of the gingival sulcus in millimeters

Hard palate

Dense collagen fibers are found in the gingival unit and also on the…

Free gingiva

Circular lamina propria fibers encircle the teeth and tie them together, keeping the _ firm.

Attachment

Cementoblasts, fibroblasts, and osteoblasts replace cementum, periodontal ligaments, and alveolar bone in the unit.

Trabeculations

Bundle bone is formed from many layers but does not have ___

Mucogingival

The alveolar mucosa joins the attached gingiva at the junction

Nutritive

The function of the periodontal ligament related to blood vessels

Sensory

The function of the periodontal ligament that sends signals of pressure and pain

Periodontal ligament

The tissue surrounding the tooth helps hold it in the alveolar bone and suspends it like a hammock in its socket

PDL

Adaptability and versatility of this allows orthodontic work

Gingiva

Interdental depression, mucogingival junction, interdental papilla, free gingival groove, attached gingiva and alveolar mucosa make up the

Dentogingival junction

The location where bacteria can invade the body

Gingival sulcus

Space facing the sulcular gingiva

Bone

The lamina propria is attached to ____ underneath it.

Alveolar mucosa

Tissue that lines the rest of the mouth, is mobile, and tears easily