Peridontium: The Tooth Supporting Structures Flashcards
Peri =
Around
Odontos =
Tooth
Tissues of the periodontium
- Cementum
- Alveolar bone
- Periodontal ligament
- Gingiva
_________ is located coronal to CEJ of each tooth.
Gingiva
Function: protects underlying tooth-supporting structures of periodontium from oral environment
Gingiva
________ is a shallow linear depression
separating free and attached gingiva
Free gingival groove
_________ is where the pink attached gingiva
meets the red alveolar mucosa
Mucogingival junction
4 anatomical areas of gingiva
- Free Gingiva
- Attached Gingiva
- Interdental Gingiva
- Gingival Sulcus
Unattached portion that surrounds a tooth in the region of the CEJ
Free Gingiva
The free gingiva is attached to the tooth by
The junctional epithelium
The part of the gingiva that is tightly bound to the underlying cementum
Attached gingiva
What is the color of healthy attached gingiva
Pale or light coral pink
Healthy gingiva may have a _______ appearance, like an orange peel.
Stipple
What is the purpose of the attached gingiva?
Allows tissue to withstand forces during chewing, speaking, and toothbrushing.
Portion of gingiva that fills the space
(embrasure) between 2 adjacent teeth.
Interdental gingiva
What is the purpose of interdental gingiva?
The interdental gingiva prevents food from
becoming packed between teeth during chewing.
Interdental gingiva consists of what 2 interdental papillae:
- Lingual papillae
- Facial papillae
_______is a valley-like depression apical to the
contact area of 2 adjacent teeth that connect facial and lingual papillae.
Gingival Col
T/F: The col will be present if there is a large space between 2 teeth or there is a notable gingival recession
False.
The col will not be present if there is a large space between 2 teeth or there is a notable gingival recession
The V-shaped shallow space between free gingiva and tooth surface.
Gingival Sulcus
Measured by a periodontal probe, a healthy sulcus measures
1-3mm
________seeps from underlying connective tissue into the sulcular space.
Gingival cervicular fluid
What is PDL
Periodontal ligament
Layer of connective tissue that covers the
root of the tooth and attaches it to the bone
of the tooth socket.
PDL - Periodontal ligament
5 functions of the periodontal ligament
- Supportive: to maintain tooth in socket.
- Sensory: provides feelings like pressure and pain.
- Nutritive: by providing nutrients to cementum and bone.
- Formative: by providing cementoblasts and osteoblasts.
- Remodeling: of alveolar bone in response to pressure.
Thin layer of hard, mineralized connective tissue that covers the surface of the root.
Root cementum
Primary function is for periodontal ligament
attachment
Root cementum
_________ are the terminal endings of
periodontal ligaments attached to cementum.
Sharpey’s fibers
Excessive deposition of cementum on the tooth roots.
hypercementosis
Mineralized connective tissue that forms bones of the upper and lower jaw to support roots of teeth
Forms bony sockets that provide support to roots of teeth.
Alveolar bone
The alveolar bone is comprised of 3 layers of hard tissue covered by a layer of connective tissue:
- Alveolar bone proper
- Cortical Bone
- Cancellous bone
________ is the bony socket that houses
the tooth.
Alveolus
_________ (holes) allow blood vessels to
connect cancellous bone to periodontal
ligament
Foramina
Alveolar bone proper
T/F: Sharpey’s fibers are embedded in
alveolar bone proper.
True
________ is a layer of compact bone that forms the outer wall on facial and lingual surfaces
Cortical bone
(aka spongy bone)
Cancellous bone
(aka spongy bone) that fills
the interior portion of the alveolar process and is found mostly in the interproximal areas
Cancellous bone
Periosteum
is a layer of connective tissue that covers the outer surface of bone.
