Week 10 Occlusal Considerations for Operative Dentistry

Question 1

what is the baseline for evaluating patients occlusion

Answer 1

teeth
tmj
musculature

Question 2

what are the goals of occlusion for direct restorations

Answer 2

-minimize trauma to supporting structures and teeth
-preserve/maintain remaining structures including the existing occlusal scheme
- promote longevity of the restoration
-restore mastication to a reasonable level

Question 3

what are occlusal contacts on direct restorations created to be in harmony with

Answer 3

the patients existing occlusion

Question 4

what is the definition of occlusion

Answer 4

the static relationship between the incising and masticating surfaces of the maxillary and mandibular teeth or tooth analogues

Question 5

what is the definition of articulation

Answer 5

the static and dynamic contact relationship between occlusal surfaces of teeth during function

Question 6

describe the most desirable contacts of posterior teeth in stationary position

Answer 6

multiple, even, bilateral and simultaneous occlusal contacts with the mandible in CR

Question 7

how are posterior teeth loaded

Answer 7

axially

Question 8

how are teeth and their periodontal ligaments best designed to absorb forces

Answer 8

along the long axes

Question 9

what can failure to achieve axial loading cause

Answer 9

• forces could eventually cause cracks, fractures, and wear on teeth
• trauma to supporting structure: periodontal ligament and surrounding bone
• possible trauma to TMJ

Question 10

what are ideal contacts of anterior teeth in stationary position

Answer 10

• anterior teeth should have lighter occlusal contacts when the posterior teeth are in occlusion

Question 11

why cant anterior teeth withstand high loads

Answer 11

because they are not loaded axially

Question 12

in excursive movements, optimal occlusal relationships are:

Answer 12

canine guidance and anterior guidance

Question 13

in right lateral movement what is happening on the laterotrusive side

Answer 13

the canine on this side guide the movement

Question 14

in right lateral movement what is happening on the mediotrusive side

Answer 14

no teeth should contact on this side

Question 15

when are occlusal interferences present

Answer 15

if in excursive movements, canine guidance and anterior guidance are not present

Question 16

what is occlusal interference

Answer 16

an unwanted or premature interocclusal contact

Question 17

what are the two philosophies for interocclusal contacts

Answer 17

-cusp fossa contacts
- cusp marginal ridge contacts

Question 18

describe the cusp fossa relationships

Answer 18

each functional cusp occludes in a fossa of the opposing tooth
- tooth to tooth arrangement
- used when restoring both opposing quadrants of teeth

Question 19

describe cusp marginal ridge relationships

Answer 19

• each functional cusp contacts the marginal ridges of opposing pair of teeth or fossae of opposing teeth
• a one tooth to two teeth arrangement
• the majority of natural dentitions have this type
• commonly used for single restorations

Question 20

what does the cusp marginal ridge occlusal relationship allow for

Answer 20

cusps to occlude onto marginal ridges and some other to occlude into fossae

Question 21

what does the cusp fossa relationship allow for

Answer 21

only each cusp to occlude into one fossa

Question 22

what are the 4 inclines present on all cusps

Answer 22

facial, lingual,mesial, and distal

Question 23

what are MI options when teeth are not ideally positioned

Answer 23

create a plateau halfway up a cuspal incline, that is perpendicular to the long axis of the tooth to serve as a cusp seat

Question 24

how do you make occlusal adjustments

Answer 24

-small football shaped carbide in a high speed handpiece
-lightly running the rotating bur over the tooth
-remove only the center of the mark

Question 25

describe anterior teeth protrusion

Answer 25

-mandible moves forward
- anterior teeth guide the movement