Lasers

Question 1

Waterlase max absorption

Answer 1

H20 and enamel

Question 2

ER:YAG absorption

Answer 2

Water

hydroxyapetite

Question 3

ND:YAG absorption

Answer 3

Hemoglobin

Melanin

Question 4

Power density =

Answer 4

watts/cm2

Question 5

Pulse modes

Answer 5

Continuous: continuous
Gated/chopped: short relaxation
Free running pulse: long relaxation

Question 6

What temp does tissue vaporization occur at

Answer 6

100 C

Question 7

Zones of laser

Answer 7

Inner: carbonization
Middle: Vacuolizaiton
Outer: denaturation

Question 8

What class of lasers do we use in dentistry

Answer 8

Class IV 500W

Question 9

How far away do we have to stand

Answer 9

18 feet

Question 10

Which type of suction w/ laser

Answer 10

Always us high volume suction

Question 11

When using laser, notes should include

Answer 11

Fiber size
Tip shape/size
Emission mode
Power
Time of exposure

Question 12

Diode lasers

Answer 12

810-980
Absorbed by pigment
Used for:
-Soft tissue 
-Low level therapy
-Whitening

Question 13

ND:YAG

Answer 13

1064: Periolas
Absorbed by pigment/hemo
Soft tissue only
LANAP procedure

Question 14

Erbium

Answer 14

2780: ER,CR:YSGG Waterlase
2940: ER:YAG Lightwalker
Used for: Hard and Soft tissue
Absorbed by:
-Water
-Hydroxyapatite
(Extremely short pulse, millionth of sec.)

Question 15

CO2

Answer 15

10600nm
Used for: Hard and soft
Absorbed by:
-Water
-Hydroxyapatite

Question 16

Laser tissue interaction

Answer 16

ablation

Question 17

How many J/cm for LLLT

Answer 17

4J/cm2