Biomechanics

Question 1

what are complex FPDs (5)

Answer 1

3+ missing
missing canine
combined A+P
non-parallel
1 or 3 abutments

Question 2

deflection is ___ related to length

Answer 2

directly (x^3)

Question 3

the longer the FPD, the more ___

Answer 3

deflection

Question 4

the thinner the FPD, the more ___

Answer 4

deflection

Question 5

deflection is ___ related to connector height (thickness)

Answer 5

inversely (1/x^3)

Question 6

minimum metal connector height

Answer 6

3-4 mm x 3-4 mm

Question 7

minimum ceramic/zirconia connector height

Answer 7

4 mm x 4 mm

Question 8

max stress that can be applied before plastic deformation occurs

Answer 8

yield strength

Question 9

how to improve connector yield strength

Answer 9

adhesive cement

Question 10

how to combat MD torque

Answer 10

BL retention grooves

Question 11

how to combat FL torque

Answer 11

MD retention grooves

Question 12

retention grooves increase ___

Answer 12

resistance

Question 13

adhesive cement increases ___

Answer 13

retention

Question 14

how to combat forces caused by being outside inter-abutment axis

Answer 14

FL grooves

Question 15

the ___ is outside the inter-abutment axis

Answer 15

canine

Question 16

stress is greater in the ___ arch

Answer 16

Mx (WT)
vs Mn (SC)

Question 17

how to reduce pier abutment failure

Answer 17

non-rigid connector

Question 18

place non-rigid connector on the ___ so it will seat during mesial movements

Answer 18

distal

Question 19

non-rigid connector indications

Answer 19

pier abutment
long span FPD
non-parallel

Question 20

non-rigid connector contraindications

Answer 20

mobile teeth
unopposed teeth

Question 21

over-reducing tipped molar decreases ___

Answer 21

resistance

Question 22

cantilever scheme

Answer 22

at least 2 abutments

Question 23

the ___ can be used as a single cantilever abutment

Answer 23

canine