Operative Fall 2 session 4 to 8

xagelusi's version from 2016-05-13 15:50

Session 4

Question Answer
what is the new age think as opposed to the old thinkingit used to be would already have a material before the restoration was done but now the LESION BASED DESIGN where the material is selected after knowing the extent of the material
does amalgam or dentin require prep into dentinyes it does .2 inside DEJ but ot for composite
what is a base used forremaining dentin thickness and materials used
what is the difference between grooves and fussuresgrooves are coalesced and fissures are noncoalesced pits
run out means whatwhen the bur is not fully seated... whether the bur cut is the same as burs diameter... should be kept to a minumal
what is resistance formresistance form to resistance of tooth to fracture from forces exerted on restoration
why is a flat pulpal floor important as opposed to roundedthe flat prevents movement, the rounded will allow rocking action producing wedging force
what is the minimum thickness of amalgam 1.5 to 2 mm
what is retention formresist displacement or removal of the restoration from tipping or lifting forces
how do you fix retention form by doing congervent and divergent
what is convenience form for adequate visibilty and access to remove caries
what type of secondary retention form is glass inomerchemical adhesion
what kind of retention form is dovetails pins and boxesmechanical feature
anything less than 90 degress cavosurface is whatunsupported enamel
what is the cutting portion of the 330 and 245 length and diameter330 is 1.8 and the 245 is 2.8 and diameter is .8
what is the diameter of the small condensersmall end is 1 and the larger end of the small condenser is 1.3

session 5 Biological basis of operative dentistry

Question Answer
what forms enamel and what is the process calledameloblasts by toms process
what is the thickest and thinniest part of enamelthickest at the occlusal and thinnest at the gingiva
does enamel form after eruptionnoo
what is the percentages of Enamel96 % inorganic hydroxyapatite and 1 to 2 organic
what are craze linessmall cracks in enamel
how much does etching increase the bondable surface area10 to 20 fold
which is more susceptible to etching- rods or interrodsrod s are more suspectable
is enamel high or low in compressive strength and tensile strengthhigh in compressive strength but low in tensile strength
what makes dentin and after eruption?odontoblasts and through out the life of the tooth
where are dentin tubules closest togetherat the pulp and then get smaller in diameter
dentin is comprised of whatintertubular dentin and peritubular dentin
which is harder- intertubulars or peritubularsperi
what is the canal wall of dentin tubulersperitubular dentin
what most be removed before you use dentin bonding and with whatthe smear layer 10% polyacrylic acid
what is the difference between polyacrylic acid and phosphoric acidphosphoric acid removes the smear and the the plug layer. the polyacrylic layer doesnt remove the plug layer
what is the hybrid layercollagen and resin.
what is the first layer of dentin called from the DEJ perpendicular**the mantle dentin
what is sclerotic dentinhypermineralized or blocked tubules due to protecting itself
what is the difference between infected dentin and affectedinfected is soft and deteriorated and affected is intact dentin with minimal bacterial involvement
what is dead tractdental tubules with no odontoblasts
primary and secondary dentin primary is just formed before the root is complete. after it is completed it is secondary and will be produced forever
what causes painthe hydrodynamic theory of dentin pain
does sensitivity increase or decrease as you go to the pulpit will increase bc the tubules are getting bigger and will be more sensitive
what is the RDTthe remaining dental thickness
what is the ideal barrier of dentin from the pulp2 mm
when is bases and liners recommendedwithin 2mm of pulp
what allows retention pins and grooves to work in dentinits dentin elasticity
what is the composition of cementum50 % inorganic and 55 % organic
what is the coronal and radicular pulpthe coronal is the chamber and the radicular is the roots of the pulp

Session 6 Development of Caries Diagnosis and Methods of Treatment

Question Answer
what is the convergence or divergence of the f and L and D M walls2 to 5 degrees
what bur do you use to remove dentin cariesround latch bur
what is a white spot lesionfirst sign of caries, called an incipient caries
bottle caries, radiation caries, and drug induced caries are all a type of what cariesRampant caries
what are the 4 zones of the smooth surface caries and which layer is the greatest demineralization layersurface, body, dark and translucent zone. the body is the greatest demineralization
does the pit and fissure caries respond well to fluoridenoo
what is the orientation of dentin cariessame as enamel, apex towards the pulp
what are the 5 zones of dentin caries and which are infected and which are affected1 is the deepest, the noraml dentin, 2 subtransparent dentin 3 transparent dentin 4 is turbid zone and 5 is infected dentin CANT REMINERALIZE . 4 and 5 are infected and 2 and 3 are affected ARE REMINERALIZED. small amount of bacteria
can you get root caries when the root is not exposednooo it has to be exposed
what is the ICDAS 0 through 60 is sound 1 is opacity after drying 2 is opacity before drying 3 local enamel breakdow 4 through 6 is in dentin 4 underlying dark shadow 5 visible dentin and 6 is extensive caries with visible dentin THE SCORE IS BASED ON VISUAL APPEARANCE
is a explorer decting caries better than visualnooo they are they same 25% detection rate
is diagnodent superior to a visual examnoo . it uses a laser used to detect dentine layer CAN HAVE A LOT OF FALSE positives and can over treat patients
when do you treat the patient, after the detection or diagnosisdiagnosis
when do you see a low medium and high CRA patientlow 12 month, moderate is 6 months and 3 for high
what is the initial prep depth of pit and fissure caries.2 to .5 into dentin using high speed
what is the general rule for enamel caries and dentin cariesenamel is white/chalky and dentin caries is dark and soft
when using the slow speed round bur in dentin, where do you startdont go to the deepest part first, go to the edge and obtain a clear margin. using THE LARGEST ROUND BUR YOU CAN FIND
what is the most valuable aspect of caries indicator die and least valuablefinding caries at the DEJ... its usually really hard to find LEAST IS find caries at pulpal wall or floor

Session 7 Bases and Liners

Question Answer
what do you always use with compositedentin bonding agent
if the amalgam prep is less than 1.5 mm to DEJ, do you need a liner? what about if youre greater than 1.5less than is a no. greater than 1.5 mm then evaluate patient. if likely to be sensitve then you use RMGI vitrebond
wht is the blushing zone1 mm from pulp and is the indirect pulp cap.
who is more sensitve to preps and restorations young people or old peopleyoung people. more sensitive less than 35
what is the most common photoinitiators in dentistrycamphorquinine around 480 nm
what type of light phtocuring do we usethe blue LED. it matches best with the most common phtoinitiator
what does camphorquinone doit is a photoinitiator that takes the photons and transfers the energy to make free radicals and polymerization
do all of restorations leak?yes they do the differenece between good and bad is how much
what does post op sensitivity feel like and how long does it lastsharp, brief, mild to moderate sensitivity to cold or any pain lasting 2 to 6 weeks
pulpitisinflammation of the pulp
does preping a tooth cause pulpitisyesss that irretates the tooth
why dont we use zinc oxide and eugenolbc it proved to be just a numbing or anesthetic, so it masks the pain and we actually need to know if there is a lot of symptoms that we need to know about
does amalgam conduct cold or heatyes it does
of dentin, glass, enamel, composite, amalgam and gold, which is the least insulatinggold then amalagum then composite then enamel.
is there anything better in protecting pulp than dentinnooo the best
do bases weaken or strengthen amalgambases weaken
at .25 from the pulp, do you use a base or liner?yes, not bc of insulation THO
what is the best base to usedentin is the best base. so even if its .5 and there are still some caries, its better to leave it
since a lot of dental materials are toxic to the pulp, will they always leak in to the pulpthe chemicals are toxic but they will not leak in bc the tubules fluid pressure is outward.
why after we etch we use calcium hydroxide liner Dycalbc we thought we had to protect the pulp from chemicals but that is old school. the dentin will protect the pulp
what is the stanley brannstrom arguementstanley believed that the acid etch leaked through the dentinal tubules and killed the pulp, thats why etching is a gel. brannstrom showed it wasnt the chemicals, the restorations leaked and bacteria went in through the tubules and killed the pulp.
the most important issue is to keep restorations from invasion of bacteria
Question Answer
what causes immediate sensitivitiyrestorations that leak caused by brannstroms hydrodynamic theory.
if the amalagam restoration is deep what do you useglass ionmer liner
how long does it take for amalagam to set1 to 6 months
what do you use to seal compositedentin bonding agent
how long does it take for tertiary dentin to form2 to 6 weeks
what do you put under a normal depth amalgamnothing you leave the smear layer on
what does copal workadded and the solvent will evaporate, leaving a sticky layers that sticks the smear layer together
if you can see the pulp, and there is still decay, what is that calledthe indirect pulp cap
if you can see the pulp, but there is no decay, what does that meanyou use a liner or base
when you are in the pulp, it is called a direct pulp cap, what is the success rateonly successful when patient is less than 25 or when pulp is normal and not bleeding crazy
what dental material is actually good for the pulp and not toxiccalcium hydroxide. it will stimulate reparative dentin
what is dycalcalcium hydroxide.
what do we need to do to keep calcium hydroxide from dissolvingusing a sealant to keep it there. for amalagam you use RMGI liner VITREBOND and for composite you use DBA Optibond
at 1 to 2 mm, you dont need to use a base or a liner EXCEPT FOR ONE INSTANCEyoung patients first restorations, very likely to be sensitive