Exam 1 (9-12, 18) Flashcards
Periodontium
Tissues that surround, support and attached to the teeth.
Made of two parts:
1. Gingiva
- Attachment apparatus:
periodontal ligament (PDL), cementum, alveolar bone
Free gingiva
closely adapted around each tooth but not attached
keratinized
Parts of free gingiva
Gingival margin
gingival sulcus
junctional epithelium
free gingival groove
Gingival margin
.
the edge of the gingiva nearest to the incised surface of the tooth
Gingival sulcus
The crevice between the free gingiva and the tooth.
Crevicular fluid
flows from connective tissue into the sulcus.
cleanses the sulcus transports enzymes and antibodies
Junctional epithelium
the epithelial attachment provides a seal at the base of the sulcus
non keratinized separates the periodontal ligament from the oral environment
Free gingival groove
a shallow linear demarcation between free gingiva and attached gingiva
Interdental papillae
Extensions of unattached gingiva between adjacent teeth
keratinized fills embrasure spaces
Col
The depression between the lingual and facial papillae that conforms to the proximal contact of posterior teeth.
Non keratinized
Attached gingiva
Part of the gingiva that is tightly connected to the cementum on the root (cervical third) and to the connective tissue cover of the alveolar bone
Mucogingival junction
The line that marks the connection between the attached gingiva and the alveolar mucosa on the facial surfaces of all quadrants and the lingual surfaces of the mandibular arch
Alveolar mucosa
The thin, moveable, loosely attached tissue covering the alveolar bone.
non keratinized
Frena
Narrow folds of the membrane that pass from a more fixed to moveable mucosa.
ex. from the attached gingiva at the MGJ to lip, cheek, or undersurface of tongue.
The periodontal ligament (PDL)
Fibrous tissue that surrounds and attaches the alveolar bone to cementum.
Interdental fiber
Connects adjacent teeth at the CEJ. Cementum to cementum
Cementum
A thin layer of calcified connective tissue that covers the tooth from CEJ to, and around, the apical foramen
Important function of cementum is to attach periodontal ligament fibers to root surface
Cementum functions
Seal dentinal tubules provide attachment for the periodontal fiber groups
maintain occlusal relationships
Alveolar process
The extended areas of bone in each arch that are tooth-bearing
Lamina Dura
Thin, compact alveolar bone lining the tooth socket
Assessment Instruments
- Mirror
- Explorer
- Probe
The handle of an instrument:
- part that is grasped
- may be smooth or ribbed with varying diameter
Functional Shank
- connects the working end to the handle
- maybe straight or curved (complex shank)
Terminal Shank
-the lower shank
Working End
- part of the instrument that contacts the tooth or tissue + performs intended function
- DICTATES THE USE
Mouth Mirror Uses (4)
- Indirect vision
- Retraction
- Reflection of light
- Transillumination
Probe Uses
-detect periodontal pockets
Traditional Probe
Williams Probe
thin, round working end
grooves at 1,2,3,5,7,8,9, and 10mm
Novatech Probe
right angle probe design
-improves adaptation only for posterior teeth
Florida Probe
-computer-assisted probe with digital readouts and computer data storage