D1-Exam 2 Quiz 4 Flashcards
Max Ant Class I outline form
Outline form in general is a rounded triangle, follows the pit
Maxillary molars distal pit
Distal pit, preserve oblique and distal marginal ridges
Maxillary molar lingual pit
tubular/eliptical
Max Molars O-L
include distal and lingual pits in one prep
width of max molar preps OL
thin, just one bur width and 1mm
Error preference for max molar OL
shifted to central/mesial b/c do not want to weaken the small d-l cusp
Disto occlusal wall of max molar OL
slightly divergent while the remainder of the distal wall is convergent
Vision for MAx molar OL
indirect
bur for distal pit on max molar OL
245
Long axis of bur should be _____ with the ____ of the tooth or with a slight _____ inclination
parallel; long axis; distal
axial wall depth of __mm from lingual surfaces
1mm
mesial and distal walls for max molar OL
convergent
______ axiopulpa line angle
Rounded
depth from occlusal and at location of axial pulpal line angle
1.5mm
external depth (from axial wall
1.0mm minimum
Always try and conserve the ___
oblique ridge
Default for Max molar OL
Two distinct preps; one mesial and one distal pit
minimum oblique ridge width between Mesial and distal pits
1mm
Mandibular molars buccal pit shape determined
carious lesion shape
Mandibular OB
Occluso-Buccal due to groove between them; the step from O to B is not as prominent as the OL prep on a maxillary molar
Walls of buccal extensions of OB
parallel to slightly converging
When you have an internal line angle, do what??
Round or blunt it
Class 1 Outline form determinants
Horizontal spread of caries NOT depth
Maxillary molars mesial pit/central pit
modified butterfly; conserve mesial ridge (incl all central developmental groove, 1/2 of B)
Orientation of Bur for Max ant class 1 prep
perpendicular to long axis/lingual surface
Max molars distal pit Class 1 prep preserve what?
preserve oblique marginal ridges
Max molars lingual pit class 1 prep (outline form and M and D walls
outline form is elliptical, M and D walls are parallel to each other or slightly converging
Max Molar OL Class 1; why connect and which pits? Respect what?
D and L pits; connect b/c groove between them is involved; hence the lingual fissure connects w/ D-oblique fissure and distal pit on O surface-RESPECT the Oblique ridge
Max molar Class 1 OL should be cut more at the expense of _____ (2) and to preserve ______ (1)
oblique ridge and buccal cusp
fissure
MD isthmus width of lingual extension on Max molar Class 1 OL should be _____ except when removing carious or undermined enamel
1mm
Max Molar Class 1 OL M and B walls and the DO wall and D
M and B Converge occlusal; Do is slight divergent while D is convergent
Largest occlusal table
Max 1st molar
Max Molar OL prep in mouth (how to work on it/where + burr)
indirect vision w/ 245 into distal pit
Axial wall depth of ___ from L surface
1.0mm
Dimensions of L pit prep
1.5 mm depth by 1.0 mm width (axial wall) MINIMUMS
minimum oblique ridge width for OL class 1
1.0 mm
