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Macroanatomy of the Periodontium
Terms in this set (52)
is the functional tissues that surround the teeth and attach them to the jawbone
*Periodontium Composed of
stratified squamous, parakeratinized or keratinized, except for the lining of the sulcus.
connective tissue component of the gingiva
doesn't have a blood supply, It gets nutrients from CT
Marginal (free) gingiva
-attach to tooth by junctional epithelium
-unattached portion of gingiva, surrounds the tooth in region of CEJ
-shallow linear depression that separates the free gingiva and the attached gingiva
-not always present
lies between the free gingiva and alveolar mucosa
Attached gingiva connects
connected to cementum on cervical third and root to the periosteum.
Attached gingiva widest/narrower
Widest in incisor and molar regions.
Narrowest in premolar regions.
4% of populations is stippled. Children under 5 no stippling. It doesn't mean patient is unhealthy
-No stippling in free gingiva
extends from the gingival margin to the mucogingival junction.
Keratinized gingiva includes
Free and attached gingiva
fills the interproximal space between adjacent teeth. One facial and one lingual papilla
Lateral borders and tip of papilla
formed by free gingiva from adjacent teeth, the center is formed by the attached gingiva
-is a valley like depression in the interdental gingiva that lies directly apical to the contact area.
-lies directly apical to the contact
Col consists of
two interdental papillae, facial and lingual.
Col absent if
teeth are missing or recession is present
nonkeratinzed, space between the free gingiva and tooth surface.
-Base is junctional epithelium!
Gingival Crevicular fluid
Fluid that seeps from underlying CT into sulcular space
-should not be present in a healthy patient
Visible boundary where the pink attached gingiva meets red shiny alveolar mucosa
Mucogingival junction divides
keratinized gingiva from alveolar mucosa. (not visible in the palate)
-Begins at the mucogingival junction.
-Nonkeratinized, lacks distinct rete pegs
-C. T. (thin lamina propria and a vascular submucosal layer)
*junctional epithelium normally
positioned at or near the CEJ
-Part of the attachment of the tooth to the gingiva
-Forms the base of the sulcus
-is the internal basal lamina and a hemidesmosome
-Provides attachment of the JE to the tooth surface
Braces/stabilize gingiva to the tooth surface
Dentogingival junction helps
hold JE in place
Dentogingival junction composed of
Composed of the gingival CT attachment (gingival fibers to cementum) and the epithelial attachment
-Connects tooth with alveolar bone and extends from cementum to alveolar bone
-Radiolucent line around the root
-Widest near c.e.j. and apex, narrowest near middle of root
-Wide PDL associated with occlusal trauma
-CT! Covers the root surface, softer than dentin or enamel
-Fibers of the PDL are attached to the surface
-Deposits of new cementum throughout life
Cementum Vertical dimension
when cementum is created to compensate bone loss
Cementum high resistance
High resistance to resorption allows the pressure applied during orthodontics to cause resorption of alveolar bone for tooth movement without resulting in root resorption
Alveolar Bone process divisions
-alveolar bone proper
-supporting alveolar bone
Alveolar bone proper
-Thin layer of hard compact bone that surrounds the tooth socket.
-lamina dura, cribriform plate
alveolar bone proper where Sharpeys fibers terminate
-inner surface of tooth socket
Supporting alveolar bone
surrounds the alveolar bone proper, provides support to the sockets
Supporting alveolar bone consists of
-Compact or cortical bone
-Cancellous bone (spongy bone) that lies between the alveolar bone proper and the cortical bone.
refers to tooth sockets
Attachment Apparatus compromises
Alveolar bone, PDL, Cementum
-Periodontium has the same plus attached gingiva
Arterial supply for MAXILLARY alveolar bone, PDL, gingiva provided by
-Anterior and posterior superior alveolar arteries
-greater palatine artery
Mandible vascular supplied by
inferior alveolar artery and its branches, including mental artery, sublingual buccal, and facial arteries.
Free gingiva received blood supply from?
PDL, bone and gingive
records position and movement in PDL
PDL in mandible nerve supply by
inferior alveolar nerve
PDL in maxilla nerve supply by
branches of posterior, middle and anterior superior alveolar nerves.
Maxillary gingiva nerve supply
posterior, middle and anterior superior alveolar nerves, infraorbital, greater palatine, and nasopalantine nerves.
Vestibular mandibular gingiva nerve supply
mental and buccal nerves
Lingual aspect of mandibular gingiva nerve supply
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