Lecture 1 Questions Flashcards
What percentage of people have periodontal diseases?
64%
What are the 4 sleeves of the periodontium?
cementum -> PDL -> alveolus -> gingiva
What are the parts of the alveolar bone?
inner cortical bone and outer cortical bone
What are other names of the inner cortical bone?
alveolar bone proper and bundle bone
What are on the ends of PDL?
root cementum and sharpie’s fibers
Where does ectomesenchyme condense?
around dental organ
What does DP give rise too?
dentin and pulp
What does dental follicle give rise too?
PDL
What does DP determine?
shape and form of tooth
What is the outer layer of HERS important for?
cementum formation
What does inner enamel layer secrete?
enamel related proteins
What is the sequence of perio formation?
crown formation -> HERS forms -> inner layer of HERS secretes enamel related proteins -> outer layer of HERS breaks off -> DF cells can form any type of bone/perio/cementum cell
Name the 3 parts of the gingiva?
free, attached and interdental papilla
Where are the extents of the free gingiva?
FGM to FGG
Where is FGM?
is the coronal end of gingiva. Can be measured by probe depth
Where is FGG?
is the junction between free and attached gingiva. Shows where the CEJ is, and is only found in 30-40% of adults
Where does the oral epithelium face?
oral cavity
where does oral sulcular epithelium face?
tooth surface without contacting it
What does junctional epithelium do?
provides contact between gingiva and tooth
what are some characteristics of attached gingiva?
- firm, coral pink, immobile, varying widths
- gingiva goes up when tooth supra erupts -> passive eruption! Which accounts for increase of gingival width
- barely any in anterior lingual, lots in molar lingual
- supports marginal gingiva (free gingiva)
- base for parts of the mouth that move, like lips and tongue and cheek
- withstand frictional and functional stresses b/c of a thick CT layer firmly bound to periosteum and bone
- barrier for passage of inflammation
is stippling automatically a bad thing?
nah bitch, 40% of adults present it, and it’s a sign of health so stfu. only when it is lost is it a sign of inflammation
What is the mucogingival junction?
junction between attached gingiva and alveolar mucosa
NOT IN THE PALATE BC THERES NO KERATINIZED TISSUE THERE!
Why should we care about the gingiva?
if patient has great oral hygiene then thickness of attached gingiva doesn’t matter. if not, width and thickness matter to prevent inflammation
What are the dimensions of width?
apical - coronal –> matters if you have perio disease
