DAO Midterm NYU COD 25'

Anterior teeth have how many lobes?

4 total

- 3 facially

- 1 forms cingulum

The middle lobe of canine becomes the ____

labial ridge

In anterior teeth, the mesial contacts are in the ______ and the distal contacts are in the ____

EXCEPT in maxillary incisors and maxillary canines, the distal contact is in the ____

incisal third for both

middle third

cervical line is also called the _____

cementoenamel junction (CEJ)

Cervical line has greatest FACIAL/ LINGUAL curvature on which tooth? what does it curve towards

maxillary central incisor

the apex

Cervical line has greater curvature on than ____ side than the ___ side of the same tooth, and curves _____

mesial greater curvature than distal

incisally

The cervical line curvature becomes ____ pronounced from anterior to posterior

less

What are the functions of the incisors

cut food, enable speech, help support lip, help guide mandible properly during teeth contact

Incisors have a _____ or _____ _____ incisal edge

straight or slightly curved

Incisors have _______ angles that are sharper then the _______ angles of the same tooth, EXCEPT _____ which are symmetrical

mesioincisal sharper than distoincisal

mand. centrals

incisors incisal edge slope _____, EXCEPT _____

cervically toward distal

mand. central (symmetrical)

incisors are _____ in shape from FACIAL perspective, and longer ______ than they are wide ______

rectangular

incisogingivally then mesiodistally

on incisors, the contact areas are at the

greatest proximal height of contour

Incisors: facial HOC is in ___ 3rd, lingual HOC is in ____ 3rd

incisal

cervical (cingulum)

All incisor roots are longer than _____. They are _____ faciolingually then mesiodistally EXCEPT on _____ _______ where they are _____

the crowns

wider

max. centrals where they are equal

Incisor roots may bend in the ______ 3rd, EXCEPT on ____ ____ which are not as likely to bend

apical

max centrals

max incisors are ___ than mand incisors

larger

max incisors are wider _____ than _____

mesiodistally than faciolingually

Max incisors have ___ fossae and ______ ______ marginal ridges than mand incisors

deeper

more pronounced

max incisors have a _____ crown to root ratio then mand incisors

poorer

mand incisors are ____ faciolingually than mesiodistally. in mand centrals, they are almost ____

wider

equal

mand lateral incisors are ____ than mand central incisors

max lateral incisors are ____ than max central incisors

larger

smaller

on max incisors, incisal edge is set more ____

facially

on mand incisors, incisal edge is set more ____

lingually

Which tooth has the longest crown? which tooth has the widest crown mesiodistally?

mand canine

max central

in max centrals, the cingulum is offset to the ___

distal

The crown to root ratio is the smallest in which tooth

max central

in max centrals, the mesial contact in in the _____ 3rd, and in the _______ for the distal contact

incisal

junction of the incisal and middle third

in max laterals, the _____ is longer than wide

crown

The incisal edge of the max lateral has the greatest ______ of any tooth

curvature

max laterals are likely to have a very deep ____ ____

lingual pit

on max laterals, the cingulum is

centered

Maxillary centrals roots are _____________, with a _____ apex that may have a ______

single, conical, and straight

straight

distal deflection

which tooth has the narrowest crown mesiodistally

mand central

What is the smallest tooth of any dentition?

mand central

in mand central, mesial and distal contacts are in ____

incisal third

on mand centrals, the cingulum is

centered

what is a distolingual twist, and which tooth has it

crown is twisted distally on its root of the distal half of the incisal edge appears more lingual on MAND LATERAL

on mand lateral, the cingulum is _____

offset to distal

mand incisor roots are _______. They also may have concavities on the ____ and ______ root surfaces

single, straight, and both longer/wider than max incisor roots

mesial and distal

**they are also wider faciolingually than mesiodistally

What is a canine eminence?

The thick facial plate of bone overlying the canine root that causes a bone projection below the gingiva

the canine is known as the

cornerstone of the arches

When smiling, only the ______ half of the canine is visible

mesial

Which tooth is often the last to be lost from decay/periodontal disease?

canine

Which is the longest tooth (crown & root)

max canines

Which tooth has the longest crown

mandibular canine

on the canines, the _____ incisal slope is shorter

mesial

Which tooth has a prominent labial ridge

canine

canine facial HOC in_____ and lingual HOC in ____

cervical 3rd for both

canine distal HOC in _____ and mesial HOC in _____

middle 3rd

junction of incisal and middle

Which tooth has the longest root

max canine

When the max canine is viewed from the incisal, the mesial half is ____ and the distal is _____

convex

concave

in the max canine, the cingulum is ____

centered

in the mand canine, the cingulum is ____

distal

Which tooth is the thickest faciolingually?

max canine

Which canine has a more pronounced labial ridge

max canine

when the mand canine is viewed from the facial, the mesial outline is ____

flat, and parallel to root

When viewed from the proximal, the mand canine crown and root makes a

C shape

the mand canine cingulum is

distal

the max canine roots are ______, having root depressions on the ___ and ____, where the _____ one is more pronounced.

Apex is _____ and may have a distal deflection

long, slender, conical

mesial and distal (more pronounced)

pointed/sharp

the mand canine roots are ______, having root depressions on the ___ and ____, where the _____ one is more pronounced.

Apex is _____

long (but shorter than max canine) and straight

mesial and distal (more pronounced)

blunt/ rounded

What is outline form?

outer shape or perimeter of the restoration

What is resistance form?

The internal shape of a prep that prevents fracture of the remaining tooth

What is retention form?

Internal shape that best prevents the filling material from falling out

Ex: grooves, slots, undercuts

What is margination

finishing the external preparation of the walls

also called cavosurface finishing

Class I Outline Form:

how far into dentin?

how far into tooth overall?

FL width?

What shape/ pattern should it follow?

0.5 mm into dentin

1.7-2 mm into tooth

1 mm FL width

follows central groove, and slightly extends major grooves

maintain marginal and oblique ridge integrity

Class I Resistance Form:

What kind of pulpal floors?

What angle should the M and D walls be with pulpal floor?

smooth, flat, pulpal floor, perpendicular to long axis of tooth

6 degrees

Class I Retention Form:

What degree should FL walls be to pulpal floor?

90 degrees

Class I and II Margination:

_____ unsupported enamel

remove

What degree should the burr enter the enamel for a mandibular first premolar? Why?

45 degrees

to match the occlusal surface, maintain transverse ridge

Class II Outline Form:

how far into tooth overall?

FL width?

What shape/ pattern should it follow?

Which way does the box converge?

1.7-2 mm into tooth

1 mm FL width

follows central groove, and slightly extends major grooves

maintain marginal and oblique ridge integrity

box converges slightly towards the occlusal

break gingival contact, open embrasures sometimes

Class II Resistance Form:

What kind of pulpal floors?

What angle should the M and D walls be with pulpal floor?

What is the axial depth?

The axiopulpal line angle is ________.

Axial wall is _____, following the contour of the _________.

smooth, flat, pulpal floor, perpendicular to long axis of tooth

6 degrees

1 mm in pre-molars and 1.3 mm in molars

- rounded

- convex, gingival cavo-surface margin

Class II Retention Form:

What degree should FL walls be to pulpal floor?

Mesial and distal walls are _______

Facial and lingual walls _______

90 degrees

-Parallel or tapering towards the occlusal

-facing each other, converging slightly towards occlusal

What is a proximal box?

the axial depth on the M or D side of a class II restoration

The proximal box should be centered on the ____

contact area

What can be used as an interproximal protector?

pre wedge, interproximal guard, Tofflemire matrix

Class III Outline Form:

What approach is preferred?

___1___ contact should be broken, ___2__ contact should not be broken

MD width should be within the ____3___

The incisal and gingival walls converge towards the __4__ and face __5___

Begin at and extend below the ___6____, without breaking ____7_____

Keep gingival width ___8____ and ___9__

Lingual approach

1. gingival

2. incisal margin

3. marginal ridge

4. access

5. face each other

6. contact point

7. facial contact

8. 1 mm FL

9. 1.5 mm axially

Class III Resistance Form:

Internal wall are ______

Preserve ____ edge

smooth

incisal

Class III Retention Form:

for composite, use ____

etch

Class III Margination Form:

All cavosurface margins meet the tooth surface at ____ degrees, with no ____

90 degrees

no bevels *except facial approach or broken facial contact

What bur is used for a Class III?

330 carbide burr (pear-shaped)

What classes are 1556 carbide burs used for (per the lecture)? What is their cutting length?

Class I, II, and V

3.8 mm

Class V Outline Form:

Shape should be proportional to ____1___, following contour of the ___2__

- more curved in the ____3__, straighter __4___

preparation is limited to ___5___ incisogingivally, and __6___mesiodistally

Gingival depth is __7___ axially

Incisal depth is __8__ axially

1. meso-distal diameter

2. CEJ

3. anterior

4. posterior

5. gingival 1/3

6. two middle fourths mesio-distally

7. 1 mm

8. 1.5 mm

Class V Resistance Form:

the contour of the axial wall must follow the _______

M&D walls are at ________

contour of the facial surface

right angles

Class V Retention Form:

Composite, use ____

Amalgam, retention grooves are placed both _____ and ____ in dentin using a _____

etch

incisally, gingivally, using a #1/2 round bur

Class V Margination Form:

Composite:

- if preparation is entirely on enamel, all Cavo surface margins are ___1___, ___2__, and at __3___

- if prep is half enamel/ half cementum, ____4_____

- if prep is all cementum, _____5_____

Amalgam: ___6____

1. beveled

2. 0.5 mm deep

3. at 45 degrees

4. Only that portion of the enamel receives a bevel

5. "butt joints all around"

6. no bevels

On class V's, enamel is beveled using only ___ burs

diamond

Why isolate with rubber dams?

improve vision, produce dry field, protect patient, infection control, more time efficient (by about 40%)

What are methods of controlling the operating field?

- rubber dams

- drugs (antisialogogues, epinephrine, liquid hemostatic agents)

- dri-angles (blocks stensons duct)

-cotton rolls

- vacuum devices

Anterior isolation is used from ___ to ___, on classes ______, using __ clamps

first PM to first PM

classes III, IV, and V

2 clamps, one on each PM

Posterior quadrant isolation is used from ___ to ____, with clamp on ____

second molar to one tooth past the midline

clamp on 2nd molar

Single tooth isolation is used in _____

endo

What is posterior 3-tooth isolation?

clamp tooth distal to the one being restored and ligate tooth anterior to the one being restored

How far away should holes be in rubber dams?

1.5-2.0 mm

Rubber dam clamp #9 is for ______

anterior teeth class V (butterfly clamp)

Rubber dam clamp #2A is for ______

smaller pre-molars

Rubber dam clamp #7 is for ______

mandibular molars

Rubber dam clamp #14 is for ______

maxillary molars

Rubber dam clamp #12A is for ______

mand right and max left molars

Rubber dam clamp #13A is for ______

mand left and max right molars