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69 Cards in this Set
- Front
- Back
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micro biology |
study of microscopically small living organisms |
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bacteria |
1 called organisms enclosed in cell wall |
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the 3 shapes of bacteria |
1. spherical (round) (cocci) 2. rod shaped (bacilli) 3. spriral shaped (spirochetes) |
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bacteria ways of growing |
aerobes anaerobes facultative |
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areobes |
require oxygen to grow |
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anaerobes |
can be destroyed by oxygen and will only grow in its absence |
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facultative anaerobes |
grow in the presence or absence of oxygen |
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capsules |
prevents antibiotics from working |
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pathogens |
microorganisms that cause disease infection occurs when they multiply |
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3 factors that influence pathogens capability |
1. host resistance 2. virulence 3. concentration |
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virulence |
pathogens ability to overcome body's defences |
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hepatitis |
inflation of liver |
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7 types of hepatitis |
a b c d e f g |
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hepatitis a |
acquired through fecal in contaminated water and food |
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hepatitis b |
highest Risk in health care bloodborne saliva needle sexual contact |
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hepatitis c |
similar to hepatitis b no vaccine at this time |
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hepatitis d |
co infection with hepatitis b has a successful vaccination |
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hepatitis e |
not bloodborne occurs in developing countries fecal and waterborne |
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hepatitis f and g |
not clinically relevant |
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tuberculosis (tb) |
caused by mycobacterium tuberculosis leading cause of death of infectious disease worldwide |
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HVE |
high volume oral evacuation |
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DIPC |
dental instrument processing center |
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4 modes of disease transmission |
direct indirect airborne parenteral |
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disinfection |
killing pathogens by chemical means |
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levels of disinfectants |
high intermediate Low |
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high level disinfectants |
turberculocidal kills most bacterial spores do not use on enviormental surfaces |
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intermediate level disinfectants |
turberculocidal does not kill bacterial spores can use on enviormental surfaces |
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low level disinfectants |
does not kill turberculocidal or bacterial spores enviormental surfaces but not instruments |
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sterilization |
destroys bacterial spores microbial forms absolute term |
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2 types of sterilization |
1. autoclaving 2. chemical vapor |
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autoclaving |
superheated steam under pressure |
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chemical vapor |
chemical heat and pressure.
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shelf life |
date kits were sterilized stored never underneath sink |
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classification of instruments |
1. critical 2. semi critical 3. non critical |
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critical items |
high risk disease transmission penetrates skin. mucous membrane or bone |
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semi critical |
moderate disease transmission |
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non critical |
low risk disease transmission |
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sharps container |
needles capsules sharp disposables |
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anesthetics carpule |
glass cartridge containing anesthetic |
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high speed handpeice |
removes bulk of tooth 450,000 rpm water sprays |
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low speed handpiece |
for finishing procedures polishes carrie removal 25,000 rpm |
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2 common attachments |
contra angle straight |
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contra angle |
for easier operation on tooth surfaces |
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straight attachment |
uses long smooth shank burs grinding polishing dental appliances |
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rotary instruments |
round pear shaped inverted straight fissure taper fissure |
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rounded burs |
initial cut prep for cavity removal |
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pear shaped bur |
for moderate to large occlusal carriers |
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inverted cone burs |
undercuts for retention grooves smooths the walls |
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straight fissure burs |
removes old amalgam |
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taper fissure burs |
prepares walls for cavity prep |
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madrals |
used on low speed headpieces holds disks and wheels like abrasive disk |
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solute |
substance that is dissolved |
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solvent |
desolves another substance |
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bases |
used with dental liners as a additional layer to protect the pulp |
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3 effects of bases |
protective insulating sedative |
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varnishes |
protection of pulpal tissue |
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eugenol |
sedative affect on pulpal tissue |
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dycal |
it's a seal protects the pulp compatible |
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intermediate restorative material (IRM) |
temp restoration up to one year it's a reinforcement can be used as cement or base |
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zinc phosphate cement |
for crowns temp or insulating base produces heat |
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ketac |
30 -60 sec mix used for crowns and bridges prevents leaks flexible firm under pressure |
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amalgam |
used in posterior teeth |
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amalgam disadvantages |
non esthetic micro leakage contains mercury |
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amalgam advantages |
restorative shapes easily strong |
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etching |
increases bond of enamel and resin 35-50% of phosphoric acid |
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alginate |
impressions |
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2 types of alganate |
fast-1min working, 1-2 setting time regular-2 min working, 4 1/2 min setting time |
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polyvinyl |
extremely accurate |
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Types of polyvinyl |
light regular heavy putty |
