Chapter 37- the only thing that matters

Question 1

T/F LPS found on sub gingival cementum extends 2 mm into the surrounding connective tissue attachment?

Answer 1

False! It only extends 1 mm into the surrounding CT!

Question 2

In more than 90% of cases, deposits of plaque and calculus remained n sites with pocket depths of greater than ____mm following SRP.

Answer 2

5 mm

Question 3

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.

Answer 3

That’s a nice fact Jordan.

Question 4

Why is the cutting edge of a hand instrument centered over the long axis of the handle?

Answer 4

So that the instrument is properly balanced

Question 5

Curettes are instruments used for both ____ and _____ ____.

Answer 5

scaling and root debridement

Question 6

What is the optimal angle between the cutting edge and the tooth for a hand instrument?

Answer 6

80 degrees

Question 7

What three things are you measuring/looking for when you are exploring the diseased site on a tooth?

Answer 7

1. probe depth
2. anatomy of the root surface
3. location of calculus

Question 8

A proper finger rest serves to what? (3 things)

Answer 8

1. Provide a stable fulcrum
2. permite optimal angulation of the blade
3. enable the use of wrist-forearm motion

Question 9

What is the “proper cutting position” for a hand instrument?

Answer 9

the shank is parallel to the long axis of the tooth

Question 10

Cutting strokes with hand instruments should always proceed in which direction?

Answer 10

Start apical and move coronal

Question 11

What is the correct angle for sharpening instruments?

Answer 11

The angle between the face and the back of the curettes should be 70 degrees

Question 12

Piezoelectric scalers move which way?

What about magnetostrictive?

Answer 12

Piezoelectric: in a straight line-linear

Magnetostrictive- elliptical

Question 13

What kind of instruments results in more tooth loss, hand instruments or reciprocating instruments?

Answer 13

Hand instruments

Question 14

Is there a benefit to using lasers when compared to SRP?

Answer 14

Nope

Question 15

What are some disadvantages of shooting laser beams into someone’s mouth?

Answer 15

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.

Question 16

What is the “gold standard” for periodontal treatment?

Answer 16

Supra and sub gingival debridement resulting in the disruption of the plaque biofilm

Question 17

What are some positive side effects of the pocket environment following SRP?

Answer 17

Decreased concentration of microbial products and tissue breakdown products
decreased gingival crevicular fluid flow
more neutral pH
colonization of a more aerobic species

Question 18

Following treatment, the sub gingival habitat may be repopulated by microorganism which originate from where?

Answer 18

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

Question 19

Why do Aa and Pg stick around after sub gingival debridement?

Answer 19

Because they’re tissue invasive

Question 20

T/F an increase in the proportion of gram + aerobic cocci and rods following SRP is associated with disease?

Answer 20

False- it’s associated with health

Question 21

T/F microorganism do not exist in isolation in the sub gingival environment, but rather as members of communities?

Answer 21

True

Question 22

A re-emergence of species of the red and orange complex 3-12 months post-debridement may be associated with what?

Answer 22

Ongoing attachment loss at these sites

Question 23

T/F Teeth with furcation involvement may be viewed with some caution with respect to their long term prognosis?

Answer 23

True

Question 24

Pain was reported to peak in intensity between ___ and ___ hours post therapy and on averaged lasted for ___ hours.

Answer 24

2 and 8

6

Question 25

Good oral hygiene measures resulting in low plaque scores prior to the commencement of non-surgical periodontal therapy have been shown to decrease what?

Answer 25

Root sensitivity

Question 26

Healing following non-surgical therapy is almost complete at how many months?

Answer 26

3

Question 27

What is improvement in probing attachment level attributed to?

Answer 27

Re-adaptation of the junctional epithelium at the base of the pocket as well as recession.

Question 28

Why is it difficult to detect ongoing destruction in individual sites?

Answer 28

Because it is very difficult to reproduce probing measurements

Question 29

The number of sites greater than 6 mm at re-evaluation bear a direct relationship to future what?

Answer 29

periodontal breakdown

Question 30

T/F BOP is a moderate predictor of future attachment loss?

Answer 30

True

Question 31

T/F full mouth disinfection yields better periodontal treatment results on the short term compared to conventional treatment?

Answer 31

True