Chapter 37- the only thing that matters Flashcards
T/F LPS found on sub gingival cementum extends 2 mm into the surrounding connective tissue attachment?
False! It only extends 1 mm into the surrounding CT!
In more than 90% of cases, deposits of plaque and calculus remained n sites with pocket depths of greater than ____mm following SRP.
5 mm
Here’s a fact- 50% or more of surfaces with pocket depths greater than or equal to 7 mm showed residual calculus irrespective of methodology.
That’s a nice fact Jordan.
Why is the cutting edge of a hand instrument centered over the long axis of the handle?
So that the instrument is properly balanced
Curettes are instruments used for both ____ and _____ ____.
scaling and root debridement
What is the optimal angle between the cutting edge and the tooth for a hand instrument?
80 degrees
What three things are you measuring/looking for when you are exploring the diseased site on a tooth?
- probe depth
- anatomy of the root surface
- location of calculus
A proper finger rest serves to what? (3 things)
- Provide a stable fulcrum
- permite optimal angulation of the blade
- enable the use of wrist-forearm motion
What is the “proper cutting position” for a hand instrument?
the shank is parallel to the long axis of the tooth
Cutting strokes with hand instruments should always proceed in which direction?
Start apical and move coronal
What is the correct angle for sharpening instruments?
The angle between the face and the back of the curettes should be 70 degrees
Piezoelectric scalers move which way?
What about magnetostrictive?
Piezoelectric: in a straight line-linear
Magnetostrictive- elliptical
What kind of instruments results in more tooth loss, hand instruments or reciprocating instruments?
Hand instruments
Is there a benefit to using lasers when compared to SRP?
Nope
What are some disadvantages of shooting laser beams into someone’s mouth?
Inadvertent irradiation and reflection from shiny metal surfaces may cause damage to patients eyes, throat, and oral tissues other than the targeted area. There is a risk of excessive tissue destruction by direct ablation and thermal side effects. Lasers also cost an arm and a leg.
What is the “gold standard” for periodontal treatment?
Supra and sub gingival debridement resulting in the disruption of the plaque biofilm
What are some positive side effects of the pocket environment following SRP?
Decreased concentration of microbial products and tissue breakdown products
decreased gingival crevicular fluid flow
more neutral pH
colonization of a more aerobic species
Following treatment, the sub gingival habitat may be repopulated by microorganism which originate from where?
residual plaque deposits radicular dentinal tubules or cementum pocket epithelium and connective tissue supra gingival plaque deposits Sub gingival deposits of adjacent teeth other intramural soft tissue sites
Why do Aa and Pg stick around after sub gingival debridement?
Because they’re tissue invasive
T/F an increase in the proportion of gram + aerobic cocci and rods following SRP is associated with disease?
False- it’s associated with health
T/F microorganism do not exist in isolation in the sub gingival environment, but rather as members of communities?
True
A re-emergence of species of the red and orange complex 3-12 months post-debridement may be associated with what?
Ongoing attachment loss at these sites
T/F Teeth with furcation involvement may be viewed with some caution with respect to their long term prognosis?
True
Pain was reported to peak in intensity between ___ and ___ hours post therapy and on averaged lasted for ___ hours.
2 and 8
6
