intro to occlusion

Question 1

occlusion

Answer 1

manner in which the teeth come together when closing the jaw

relationship between teeth when moving the mandibel

Question 2

how the teeth should work upon closing

Answer 2

posterior teeth contact

- anterior light contact

Question 3

why should posterior teeth take the load

Answer 3

large SA

capabable of taking load and distributing it

Question 4

ICP

Answer 4

relationship between mx and md when the teeth are in maximum intercuspation(when teeth are together)

Question 5

centric relation

Answer 5

the most anterior supeiro position of the condule disc within the glenoid fossaa
relationship between mx and md (not to do with teeth)

Question 6

RCP

Answer 6

first point of contact when mouth is closing

Question 7

during sideways movement

Answer 7

posterior teeth seaprate

canine dictates movment

Question 8

canine guiande

Answer 8

resists sideways forces due to shape
root is very long
distant from hinge and muscle

Question 9

during forwards movemet

Answer 9

contact on protrusion
anteerior teeth disclude the posterior teeth
palatal surfaces of upper anterior teeth dicate md movemtn

Question 10

teeh classiications

Answer 10

class 1
class 2(2 divisons)
class 3

Question 11

class 1

Answer 11

the mesiobuccal cusp of the upper first molar occlusdes in the buccal groove of the permanent md 1st molar
lower incisor occlides just below the upper incisor cingulum plateau

Question 12

class 2

Answer 12

• Lower incisor occludes behind upper incisor cingulum plateau
• upper incisors are the correct inclination or proclined, overjet is increased
• Upper central incisors are retroclined
• The mesibuccal cusps of the permanent maxillary first molar occludes mesial to the buccal groove of the permanent mandibular first molar (lower molar tooth is further back

Question 13

divison 1 and 2 of class 2

Answer 13

div 1 overjet

div 2 overbite

Question 14

overbite

Answer 14

• Upper central incisors are pro lined
• Lower incisor occludes behind the upper incisor
• large overbite

Question 15

class 3

Answer 15

Lower incisors occludes in front of the upper incisor cingulum plateau
- or edge to edge
The mesiobuccal cusp of the permanent maxillary first molar occludes distal to the buccal groove of the permanent mandibular first molar

Question 16

anteior open bite

Answer 16

only posteiro teeth contact

large amounts of space between anteiror teeth

Question 17

movement of manible dictated by

Answer 17

• Position of the condyle in the fossae
• Condylar pathway along the articular eminence
• Teeth interferes with this border movement

Question 18

protrucisve excursion condyle movment

Answer 18

condyle moves forwards and downwards

Question 19

working side

Answer 19

where there is contact and where the lower teeth are moving to that side

Question 20

ideal occlustion

Answer 20

• CR= ICP
• forces directed through long axis of the teeth
• Anterior guidance in protrusion
• Canine guidance in lateral excursion
• Mutual protection

Question 21

group fucntion

Answer 21

all of the teeth contacting as we move to the working side, group of teeth functioning rather than canine guided when going sideways

Question 22

balanced occlusion

Answer 22

vartificial, eg in dentures to keep stable attempt to make the sides balance and for the teeth to mesh together in each excursion