dentinal hypersensitivity

Question 1

presentation of hypersensitivity

Answer 1

Question 2

dentinal tubules

Answer 2

from pulp to outer dentinal surface
can be open or plugged
total number varies

Question 3

contents of dentinal tubules

Answer 3

tomes fibers from the odontoblasts in pulp

Question 4

what nerve fibers can be associated with tomes fibers

Answer 4

A-delta
A-beta
C

Question 5

Hypersensitive Dentin
* Tubules open/closed?
* Large number of?

Answer 5

• Tubules open to cavity
• Large number of tubules

Question 6

Smear Layer
* Deposit of?
* Debris from?

Answer 6

• Deposit of Salivary Proteins
• Debris from toothpaste and other
  matter

Question 7

branstroms hydrodynamic theory

Answer 7

Stimuli are transmitted to the pulp surface due to the movement of fluid or semi-fluid within open dentinal tubules

Question 8

etiology of dentinal hypersensitivity

Answer 8

Question 9

possible cause gingival recession

Answer 9

Question 10

enamel loss common cause

Answer 10

erosion

Question 11

causes of erosion

Answer 11

Question 12

hypersensitivity prevalence
occurs in?
common ages?
sex?

Answer 12

▪Occurs in all age ranges
▪ Higher incidence in 20-40 year old age group
▪Females more prone

Question 13

common site hypersensitivity

Answer 13

buccal and labial surfaces

Question 14

common teeth that have hypersensitivty

Answer 14

• Canine/premolar
• Incisors
• 2nd pre-molars and molars

Question 15

diagnosis of hypersensitivity is one of?

Answer 15

exclusion

Question 16

tx to hypersensitivty?

Answer 16

mod pt behavior
mod diet
teeth whitening

Question 17

in office tx options to sensitivity

Answer 17

• Varnishes/Precipitates
• Primers
• Placement of restorations: Composite resin-based/ Restorations with glass ionomer

Question 18

At Home sensitivity tx options?

Answer 18

• Dentifrices, Gels, Rinses
• Mode of action: Interference of action potential or Tubule Occlusion

Question 19

Glutaraldehyde/HEMA based agents for hypersensititvity mechanism?

Answer 19

Significantly reduce hypersensitivity immediately after treatment
Reduces dentin permeability

Question 20

5% Sodium Fluoride Varnish for hypersensitivity
forms? relief provided by?

Answer 20

Forms a barrier over exposed dentin
Relief provided by calcium fluoride deposits

Question 21

Recaldent (CPP-ACP)
Casein phosphopeptide – amorphous calcium phosphate
Mechanism of action?
use?

Answer 21

At home
Mechanism of action:
- replaces calcium and phosphate ions
Use:
- apply with a prophy cup
- at home use-applied after brushing teeth*

Question 22

at home tx to interfere with AP of sensitivity
works by?
freq of use needed?

Answer 22

Dentifrices containing 5% potassium nitrate
Works by penetrating the length of the tubule to depolarize the nerve endings
Frequent and regular application is needed

Question 23

at home tubule occlusion for sensitivity
main ingredient?
most common compound used? others?
Rx one? (%/ppm)

Answer 23

Main active ingredient is fluoride
*Stannous Fluoride – most commonly used
*Arginine and calcium carbonate
*Hydroxyapatite

Prescription Strength Fluoride Toothpaste:
5,000 ppm (1.1% Sodium Fluoride) – Colgate PreviDent