10/8: Biomechanics

Question 1

application of meechanical engineering principles in the living organisms

Answer 1

biomechanics

Question 2

RPD support structures

Answer 2

alveolar bone

Question 3

alveolar bone provides support via

Answer 3

abutment teeth and PDL
residual ridges

Question 4

in RPD tooth support, teeth like

Answer 4

long axis

Question 5

what are deterious forces in tooth supports?

Answer 5

off-axis
torque
horizontal

Question 6

this is resistance to dislodging

Answer 6

retention

Question 7

resistance to horizontal

Answer 7

stability

Question 8

resistance to vertical seating

Answer 8

support

Question 9

what is the most important thing to oral health?

Answer 9

support

(this will be on the exam)

Question 10

one part of the restoration is made to counter effects of another part

Answer 10

reciprocation

Question 11

true reciprocation can only occur when

Answer 11

reciprocating element touches tooth prior to retentive clasp

Question 12

what classes are tooth-supported?

Answer 12

class III and IV

Question 13

what classes are tooth-tissue supported?

Answer 13

class 1, II, IV long span

Question 14

in tooth supported, what class BEST resists forces?

Answer 14

class III

Question 15

what occurs when you have rotation in the sagittal plane around the horizontal plane?

Answer 15

vertical dislodgement

Question 16

what forces do you need to resists rotation around the horizontal fulcrum?

Answer 16

retention
support

Question 17

this is resistance to rotation away from the ridge (dislodgement)

Answer 17

retention

Question 18

this is the resistance to rotation towards the ridge

Answer 18

support

Question 19

what forces is needed to reist rotation around the longitudinal/vertical fulcum?

Answer 19

stability

Question 20

RPDs function as a

Answer 20

lever

Question 21

what lever classes are there?

Answer 21

1,2,3

Question 22

you get class 1 and 2 levers in

Answer 22

tootg-tissue supported RPDs

Question 23

are fulcrums and levers a factor in class III?

Answer 23

No

Question 24

this lever occurs when you have rotation around horizontal fulcrum towards the terminal rests

Answer 24

class I

Question 25

in a class I lever, should the retentive clasp be ANTERIOR to the fulcrum

Answer 25

No

Question 26

you have distal rest and mesial rest in what levers?

Answer 26

class 1 = distal
class 2 = mesial

Question 27

what is the most detrimenta lever class?

Answer 27

class 1

Question 28

what factors influence magnitude of stress transmitted to abutment teeth?

Answer 28

length of extension
quality of support ridge
flexural qualities
clasp design
abutment tooth surface
occlusal harmony