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Calculus & Other Disease Associated Factors 1st Half
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Terms in this set (11)
Calculus & the RDH
90% of treatment is spent on removing calculus
cause of periodontal problems?
5% of treatment time is spent on plaque control
reevaluate
Reevaluation
4 BWs
want to see: less bleeding, less inflammation and lowered probing depths
Calculus
formed through deposit of Calcium and phosphate salts in bacterial plaque
contributing factor in perio problems
Bacteria
etiologic agent in perio problems
Supragingival Calculus
found on clinical crowns of teeth, above margin of gingiva
abundant near openings of salivary glands
aka supramarginal or salivary
inorganic mineral content is 7090%
Burnished Calculus
can cause a perio blow up in the area it is left because it is trying to heal
Minerals in Supragingival Calculus
*Phosphate
Calcium Carbonate*
Magnesium
Sodium
Potassium
Traces of fluoride, zinc, strontium
(know the first two)
Supra Crystal Formation
starts as one form and gets stronger as it grows
Brushite early and then converts to Hydroxyapatite
58% Hydroxyapatite
21% Octacalcium
21% Magnesium
9% Brushite
Formation Time Frame
Pellicle forms about 20 minutes after brushing
bacterial plaque forms within 24 hours
Calcification/Mineralization occurs within 2472 hours
Maturation time is 12 days
Supragingival Calculus
forms on the root surface below the gingival margin
also called submarginal or serumal
Characteristics of Subgingival Calculus
tenacious

black or dark green due to blood and bacteria products
rings or ledges
plaque forms more in recession areas
forms as an extension of supra plaque
minerals come from gingival crevicular fluid
contains calcium, magnesium, and fluoride
no salivary protein present
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Verified questions
CALCULUS
Consider the motion of the following objects. Assume the xaxis is horizontal, the positive yaxis is vertical, the ground is horizontal, and only the gravitational force acts on the object. a. Find the velocity and position vectors, for $t \geq 0$. b. Graph the trajectory. c. Determine the time of flight and range of the object. d. Determine the maximum height of the object. A baseball has an initial position (in ft) of $\left\langle x_{0}, y_{0}\right\rangle=\langle 0,6\rangle$ when it is thrown with an initial velocity of $\left\langle u_{0}, v_{0}\right\rangle=\langle 80,10\rangle \mathrm{ft} / \mathrm{s}$.
CALCULUS
An evergreen nursery usually sells a certain shrub after 6 years of growth and shaping. The growth rate during those 6 years is approximated by dh/dt=1.5t+5, where t is the time (in years) and h is the height (in centimeters). The seedlings are 12 centimeters tall when planted (t=0).
CALCULUS
A rectangular plot of land is to be defined on one side by a straight river and on three sides by postandrail fencing. Eight hundred feet of fencing are available. How should the fencing be deployed so as to maximize the area of the plot?
CALCULUS
Determine which of the vectors is (are) parallel to z. z has initial point (1, 1, 3) and terminal point (2, 3, 5). (a) 6i + 8j + 4k (b) 4j + 2k
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