Autumn midterm: arbitrary mounting and 3ld

Question 1

what is kois

Answer 1

the alignment system with the index tray, rod position interpupillary etc. (vs arbitrary mounting)

Question 2

what is arbitrary mounting

Answer 2

mounting stone models without kois analyzer record. using mounting table with arbitrary occlusal plane tilt and maximum intercuspation.

Question 3

what is an incisal indicator

Answer 3

curved metal , define midline

Question 4

what is the curve of spee

Answer 4

curve formed by connecting all buccal cusps in a quadrant.
in ideal occlusion, anteroposterior curve of the occlusal plane.. curve of maxillary arch is convex and mandibular is concave

Question 5

how do you prepare the base for retention on a arbitrary mount

Answer 5

scratch it, moist and wet it well (no indexing)

Question 6

what is the water/powder ratio, working time and setting time for mounting stone

Answer 6

• water (26 ml), powder (100 g)
• working time is 2-3 minutes
• setting time is 5 minutes

Question 7

where should the incisal pin be when gluing for max intercuspation

Answer 7

touching the incisal plate! make sure of it.

Question 8

what are the criteria for the esthetic waxup maxillary central incisors

Answer 8

-length should be 10.5-11 mm from gingival crest. (tooth 8 will be used as reference)
must be anterior guidance, (protrusive)- not sure what they mean here
symmetrical

Question 9

what is the criteria for the maxillary lateral incisors length

Answer 9

.5 mm shorter than central incisors & symmetrical

Question 10

what is the criteria for maxilary canines length and occlusion

Answer 10

same length as the central incisors

MI canine guidance- 11 and 22, 6 and 27

Question 11

what are considerations before working on a patient

Answer 11

• perio health
• general condition- dentition hard tissue exam
• existing restorations
• occlusion
• caries risk assessment

alternative is ortho ( vs veneers) ? also doing nothing– this is another option

-gather: radiographs, extra oral photographs, intraoral photographs, and diagnostic casts

Question 12

what is T-reference?

Answer 12

-a vertical line to establish midline and a horizontal lineparallel to the patients interpupilary line.

Question 13

what are the golden width proportions for maxillary anteroirs

Answer 13

snow (1999) suggested theres an ideal. based on apparent width from the fromtal view.

• 25, 25 for central incisors, 15 and 15 for the lateral incisors and 10, 10 for the canines
• so the central incisors make up 50% of the width of all of these.

Question 14

what tool can help with golden proportions

Answer 14

golden proportion ruler. panadent (templates) caliper or ruler.

Question 15

what will you use for width and proportions vs length measurements

Answer 15

width and proportion; panadent

length: ruler

Question 16

what are the available panadent measurements

Answer 16

7-10 mm options (.5 increments)

Question 17

what are the incisal embrasure sizes (S M L)

Answer 17

small, medium , large (from midline to lateral)

Question 18

what is the axial inclination of maxillary anteriors

Answer 18

from the frontal view, each maxillary anterior tooths long axis converges toward the midline

Question 19

what should the width of central incisors be in the class project for waxing

length?

Answer 19

width : 8.5 -9.5 (8.5 panadent)

length: 10.5-11 mm (10.5 reference point from the crest of gingival number 8)

Question 20

how much shorter than centrals should lateral incisors be

Answer 20

.5 to 1 mm shorter

Question 21

what are the two types of lithium disilicate/ treatments needed for those

Answer 21

I: LD in form of ingots pressed; one heat treatment for crystallization

II: LD in form of block milled ; two stage heat for final crystalization

Question 22

what are the brand names for LD mentioned in class

Answer 22

IPS e.max CAD and IPS e.max Press

Question 23

when can monolithic llithium disilicatebe used

Answer 23

full coverage single units anterior teeth, multiple units anteiror bridges, premolars single unit and low stress bearing molars

Question 24

what is ideal and the range for occlusal reduction of LD

Answer 24

ideal = 2 mm.

passing range = 1.51-2.99 mm (1.5 is a fail and 3 mm is a fail)

Question 25

what is the ideal and the range for axial reduction of LD

Answer 25

ideal = 1.5 mm

passing range = 1.01 mm-1.99 mm

Question 26

what is the ideal and range for wall tapers

Answer 26

6 degrees is ideal on each opposing wall.

passing range = 1-0 degrees

Question 27

what is the ideal and passing range of the margin depth for LD

Answer 27

ideal = 1 mm

passing range = .51- 1.49 mm

Question 28

what is the ideal and passing range of the margin location for LD

Answer 28

ideal = .5 mm above gum
range = 0-1.49 mm above gums

Question 29

how big should the buccal bevel be for LD

Answer 29

its the non functional bevel /esthetic. and it should be 1/3 buccal wall

Question 30

what bur can be used for the LD prepp

Answer 30

847-16