class 1 compossite filling and bonding fundamentals

Question 1

Who developed the first system of bonding acrylic resin to dentin?

Answer 1

Dr. Oskar Haggar 1949

Question 2

what did Dr. michael buonocore invent?

Answer 2

an acid etch technique ( 1955)

Question 3

What did Dr. Rafael brown invent?

Answer 3

a thermoset resin complex used in composite resin

Question 4

In dentistry, bonding of resin based materials to tooth structure is a result of four possible mechanisms which are….

Answer 4

mechanical, adsorption, diffusion , and a combination of the previous 3

Question 5

What is the mechanical bonding part?

Answer 5

penetration of resin and formation of resin tags within the tooth surface

Question 6

Whats the adsorption bonding part?

Answer 6

chemical bonding to the inorganic or organic components of tooth

Question 7

whats the diffusion bonding part?

Answer 7

precipitation of substances on the tooth surface to which resin monomers can bond mechanically or chemically.

Question 8

what % of etchant is phosphoric acid and what does etchant do to enamel?

Answer 8

37%, it makes micro pores increasing the strength of the bond

Question 9

what kind of etchant does LECOM use?

Answer 9

beautibond by shofu, we use the 7th generation which is all in one system

Question 10

what do desensitizer do?

Answer 10

they crosslink the tubular proteins causing them to plug and limit post operative sensitivity.

Question 11

after the tooth is prep’d, should you dry it out like crazy?

Answer 11

no, just gentle air, be caregull not to desicate.

Question 12

after gently dried, what do you do next?

Answer 12

etch with 37% phosphoric acid, both enamel and denitn for 30 seconds ( tooth will be frosty white)

Question 13

If you decide to use a desnesitizer, at what point do you put it on?

Answer 13

after etching

Question 14

after you etch whats next?

Answer 14

use a benda brush and apply primer/bonding agent and leave it for 10 second. light cure 10 sec

Question 15

after applying the bonding agent, whats next?

Answer 15

place composite with increment fill with no thicker than 2mm at a time. Light cure 20 seconds each time. This reduces C factor

Question 16

whats the C factor again?

Answer 16

ration of bonded surfaces to undbonded. Or free surfaces in a tooth preparation.

Question 17

before you add compiste in increments to the buccal and lingual walls, where should you put some composite?

Answer 17

put a horizontal floor down.

Question 18

T/F, with the 7th generation composite, you should dip your instrument into alcohol while adding occlusal anatomy

Answer 18

F, only do this step when etch step is seperate. the 7th generation includes the etch step.

Question 19

after the desired anatomy is added to the unbonded composite what do you do?

Answer 19

cure it, and polish

Question 20

which are better to use for acclusal anatomy? carbide or diamond burs?

Answer 20

carbide, diamond roughen up the surfaces.

Question 21

what settings should you use for the super snap polishers?

Answer 21

low speed with gentle stream of water.

Question 22

whats the advantage of applying a composite sealer?

Answer 22

it reduces microleakage and seals micro cracks.

Question 23

how do you add the composite sealer?

Answer 23

etch the newly placed composite for 45 seconds, apply sealer and cure for 20 seconds.