Final sweep Flashcards
Types of pins
cemented, friction locked, threaded
— pin diameters inside dej
2
• Ionomers need a
clean intact dentine surface with exposed mineral
• Ionomers attach by chelating with HA surfaces (metal ions)
• Adhesives need a
demineralized dentin surface with exposed collagen
• Hybrid layer
GI rxn -
• Next 24 -72 hours •
Al+3 replace Ca+2 • Increase strength • F- released
Collimated –
Laser energy travels in a straight line because all the photons are moving in the same direction.
Active medium
name and wavelength of laser. May generate more than 1 wavelength
Power density =
Watts/cm2
Joule
unit of energy - ability to do work
Watt
unit of power - rate of doing work
Free-Running Pulse Mode –
Extremely short pulses and relatively long thermal relaxation periods allow target tissue to remain cool. Often, Free-Running Pulsed lasers use a mixture of air and water to assist in cooling of tissues.
Continuous Wave Mode –
The laser is ‘on’ as long as the foot pedal
is pressed. This mode creates ‘hot’ laser energy and thermal damage.
Gated or Chopped Pulse Mode -
There is a period of thermal relaxation between pulses when the laser is ‘off.’ This allows target tissue to warm more slowly that Continuous Wave Mode.
Chart info for lasers:
Fiber size, tip shape and size, emission mode, power/energy settings, exposure time
Diode Lasers
SemiconductorLaser
• 810-980 nm
• Near-Infrared portion of the Electromagnetic Spectrum
• Soft-Tissue, Low Level Therapy & Laser Whitening
• Highly absorbed by pigment
• Usedincontactornon-contactmode
