dentinal hypersensitivity

dentinal hypersensitivity

short, sharp pain arising from exposed dentin in response to stimili

most common complaint with dentinal hypersensitivity

pain from cold beverages or air

typical age range for people experiencing dentinal hypersensitivity

20-40

what surfaces are most affected

facial surfaces

which teeth are most commonly affected

premolars

hydrodynamic mechanism theory of pain conduction

stimuli causes rapid fluid movement, creating pressure that excites pulpal nerves

smear layer

1 micron thick layer of sdherent debris produced during instrumentation, lowers dentin permeability

how diameter of dentinal tubules differ between sensitive and none sensitive sites

sensitive sites have wider tubule diameters than non-sensitive sites

abfraction

loss of tooth structure at CEJ caused by tooth flexure during function

four types of pain stimuli for hypersensitivity

mechanical, chemical, osmotic, thermal

osmotic stimulus

concentrated solutions induce fluid movement within the tubules toward the area of higher osmolarity

sclerotic dentin

natural desensitization process involving deposition of minerals within the tubule, decreasing its diameter and permeability

how secondary dentin formation provides natural desensitization

deposited after root formation is complete, reducing the size of pulp chamber and number of nerve endings

what is tertiary (reparative) dentin

dentin produced by cells directly affected by specific stimuli

primary factor in clinical treatment of sensitivity

plaque control

three desired effects of professional desensitizing agent

surface coating of tubule entrances, intratutbular mineralization, stimulation of reparative dentin formation

potassium nitrate aids

It create a calming effect on pulp by affecting the transmission of nerve impulses

strontium chloride aids

calcium is displaced and strontium apatite is formed

NAF and SNF2 aids

occlusion of dentinal tubules

potassium oxalate aids

occlusion of dentinal tubules due to formation of calcium oxalate crystals

benzalkonium chloride aids

rids surface of residual bacteria

5% glutaraldehyde aids

disinfects, coagulates collagen

MI paste aids

binds to biofilms, when PH drops calcium and phosphorus are released and transported into tooth structure

laser therapy aids

obliterates dentinal tubules through process called melting and resolidification

difference between pulpal and dentinal pain

pulpan pain more severe w/ throbbing

structural components of dentinal tubule

each tubule contains cytoplasmic process of and odontoblast and is surrounded by calcified tissue

how do dentinal tubules change with age

odontoblast processes withdraw toward pulpal ends of tubules