Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
50 Cards in this Set
- Front
- Back
What 4 structures make up the periodontium? |
gingiva, cementum, PDL, alveolar bone |
|
Gingiva can be divided into what 4 categories? |
free, sulcular, interdental, attached |
|
Define periodontium |
functional system of tissues that surrounds teeth and attaches them to the bone |
|
what types of tissue make up the gingiva? |
a thin layer of epithelium and an underlying core of connective tissue |
|
what is the function of the gingiva? |
holds tissue against teeth during mastication |
|
The attached gingiva is surrounded by what 2 boundaries? |
free gingival groove and mucogingival junction |
|
What does the free gingival groove seperate? |
free and attached gingiva |
|
What type of gingiva surrounds the tooth like a turtle neck? |
free gingiva |
|
Which type of gingiva is pulled away with the perio probe? |
free gingiva |
|
Which tissue is located between the free gingiva and the alveolar mucosa? |
attached gingiva |
|
Where is the attached gingiva widest? |
incisor and molar regions |
|
Where is the attached gingiva narrowest? |
premolar regions |
|
Why is lingual attached gingiva of upper anteriors not measured? |
because it is continuous with the palatal mucosa |
|
What causes stippling of attached gingiva? |
connective tissue fibers that attach gingival tissue to the cementum and bone (rete pegs) |
|
What is the function of the attached gingiva? |
prevents free gingiva fro being pulled away from tooth when tension is applied to alveolar mucosa, allows gingival tissue to withstand mechanical forces |
|
Define col |
valley-like depression in the interdntal gingiva that lies directly apical the the contact area |
|
In health, how deep is a gingival sulcus? |
1-3 mm |
|
what forms the base of the sulcus? |
junctional epithelium |
|
What makes cementum different from bone? |
cementum is more resistant to resportion |
|
What characteristics of bone and cementum allow ortho to be possible? |
high cementum resistance to resorption and low alveolar bone resistance to resportion |
|
Does cementum have its own blood or nutrient supply? |
no, cementum gets nutrients from the PDL |
|
What are the functions of root cementum? |
Acnhors the PDL to the tooth Protects dentin seals dentinal tubules Forms on the apical area to compensate for occlusal wear
|
|
Define PDL |
soft CT that covers the root of the tooth and attaches it to the bone of the tooth socket |
|
How does PDL grow? |
from each anchor point (Sharpeys fibers) and connects in the center. One end from cementum on from alveolar process |
|
Describe the support function of the PDL |
suspends and maintains the tooth in the socket |
|
Describe the sensory function of the PDL |
provides pressure and pain sensory info to tooth |
|
Describe the nutritive function of the PDL |
provides nutrients to cementum and bone |
|
Describe the formative function of the PDL |
builds and maintians the cementum and alveolar bone of the tooth socket |
|
Describe the resorptive function of the PDL |
remodels the alveolar bone in response to pressure |
|
Existence of the alveolar process is depentent on the presence of teeth because.... |
if extracted, alveolar bone resorbs if no teeth develop, no alveolar bone develops |
|
What are the layers of alveolar bone? |
Alveolar bone proper (cribiform plate) cortical bone cancellous bone periosteum |
|
Which bone are the ends of the PDL fibers embedded? |
alveolar bone proper (cribiform plate) |
|
What surrounds the alveolar bone proper and gives support to the socket? |
cortical bone cancellous bone also provides support |
|
Does cortical bone show up on radiographs? |
no, but cancellous bone does |
|
What is between the alveolar bone proper and the cortical bone? |
cancellous bone this also provides support for the a.b.p |
|
Overview of V2 |
sensory to skin, face, head, teeth, oral and nasal cavities |
|
Overview of V3 |
motor function for chewing |
|
Which nerves innervate the maxillary gingiva? |
ASA, MSA, PSA, infraorbital, greater palatine, nasopalatine |
|
Which nerves innervate the mandibular gingiva? |
mental, buccal, sublingual branch of the lingual nerve |
|
Which nerves innervate the teeth and PDL of maxillary? |
ASA, MSA, PSA |
|
which nerves innervate the teeth and PDL of mandible? |
IA |
|
What vessels provide blood supply to the maxillary gingiva, PDL, and alveolar bone? |
ASA, PSA, IA, greater palatine arteries |
|
What vessels provide blood supply to the mandibular gingiva, PDL, and alveolar bone? |
Branches of IA artety, buccal, facial, mental, sublingual arteries |
|
What major artery provides blood supply to the teeth and periodontal tissues of the maxilla? |
superior alveolar arteries |
|
What major artery provides blood supply to the teeth and periodontal tissues of the mandible? |
IA arteries |
|
Which nodes drain most perio tissue? |
submandibular nodes |
|
which nodes drain palatal gingiva of the max? |
deep cervical nodes |
|
which nodes drain the gingiva and region around mand incisors? |
submental nodes |
|
which nodes drain the 3rd molar region? |
jululodigastric nodes |
|
which artery enters the tooth socket? |
intraseptal artery |