Exam (elaborations)
RDAEF OPERATIVE DENTISTRY- CALIFORNIA
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RDAEF OPERATIVE DENTISTRY- CALIFORNIA
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RDAEF OPERATIVE DENTISTRY- CALIFORNIAHow many classes of cavities are there and how many did GV black classify? - Answers
-6, but Black classified 5
What do GV black classifications tell you? - Answers -The location in permanent teeth
What do GV Black classifications not tell you - Answers -Does not tell how deep, or the
condition of the pulp
Class I lesions occur where? - Answers -in pits and fissures of the facial, lingual and
occlusal surfaces of molars and premolars
Also found in pits of maxillary lingual incisors
Where else are class I lesions found? - Answers -pits of maxillary lingual incisors
Class II lesions occur where? - Answers -The proximal surfaces of posterior teeth....
anything proximal on a posterior tooth
Where do class III lesions occur? - Answers -Proximal surfaces of anterior teeth NOT
involving the incisal angle
What is meant by resistance form? - Answers -resistance of tooth structure to occlusal
forces... you don't want to undermine dentin by undercutting or gouging out, you want
sound dentin supporting enamel
Resistance refers to? - Answers -horizontal direction
Retention form refers to? - Answers -vertical direction... not enough depth could allow
restorative to fracture or wear away
What is meant by convenience form? - Answers -Convenience for the operator... Must
be able to have enough room to do the work you need to... for 19 MO must open up
buccal, lingual and gingival floor to pack composite
Why must enamel walls be smooth? - Answers -Jagged margins will allow bacteria to
accumulate
Poorly finished enamel walls will lead to what? - Answers -recurrent decay
How do we cleanse teeth? - Answers -consepsis before procedure... afterwards we use
air/water syringe to make things look nice (in sim clin)
Consepsis is brand name of? - Answers -chlorohexadene
, What are the 3 parts to a hand instrument? - Answers -blade, shank, shaft (handle)
The blade refers to what aspect of hand instrument? - Answers -working end
The shank of a hand instrument does what? - Answers -connects handle to blade
What is a cutting isntrument? - Answers -anything with a blade
What is a non cutting instrument? - Answers -anything without a blade
What are gingival margin trimmers used for? - Answers -similar to hatchet except the
blade is curved
Where do class IV lesions occur? - Answers -Proximal surfaces of anterior teeth when
the incisal angle requires restoration
Class IV lesions are usually caused by? - Answers -trauma
Where do class V lesions occur? - Answers -in smooth, facial and lingual surfaces in the
gingival third of teeth on both anterior and posterior teeth
Factors that cause class V lesions? - Answers -abrasion, acid erosion, abfraction from
grinding (chipping of enamel)
Where do class VI lesions occur? - Answers -In the pit or wear defects on the incisal
edges of anterior teeth or the cusp tips of posterior teeth
Examples of class VI lesions - Answers -Patient who grinds have cupped cusps or
cupped anterior incisal angles that could have lesions
Which class is not part of black's classification? - Answers -VI
What are the principles of cavity preparation? - Answers -Outline, resistance, retention,
Convenience, removal of carious dentin, finish of enamel walls, cleansing
The bevel for cutting on a gingival margin trimmer is on what side of the curve? -
Answers -outside of the curve
Each blade on an instrument has 4 numbers. What do they stand for? - Answers -1)
width of blade in tenths of mm
2) cutting edge angle
3) length of blade
4) blade angle
What grasp is used to grip most instruments? - Answers -pen grasp
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