Occlusion and Restorative Dentistry 2

Question 1

what would millers forceps be used for

Answer 1

positioning articulating paper

Question 2

functional cusps

Answer 2

cusps that occlude with opposing teeth in the ICP.
lingual cusps of maxillary posteriors
buccal cusps of mandibular posteriors

Question 3

non functional cusps

Answer 3

cusps that do not occlude in ICP
buccal cusps of maxillary posteriors
lingual cusps of mandibular posteriors

Question 4

where do functional cusps contact

Answer 4

the fossa of the opposing tooth
e.g lingual cusps of maxillary posteriors contacts the fossa of lower molars

Question 5

what is considered a normal overbite

Answer 5

2-4mm

Question 6

what is a cross bite

Answer 6

one of more teeth are abnormally positioned either buccal, lingually or labially in reference to opposing teeth

Question 7

what is a canine guided occlusion also known as

Answer 7

mutually protected occlusion

Question 8

canine guidance

Answer 8

canines guide lateral movement
when mandible moves to the side the only contact will be between the canines. there will be no posterior tooth contacts
this is the gold standard

Question 9

group function

Answer 9

when mandible moves to side there is multiple teeth in contact posteriorly
commonly seen bilaterally in patients with toothwear

Question 10

what is the ideal tooth contacts during protrusion of mandible

Answer 10

only incisors and canines touching with no posterior contacts

Question 11

why are posterior contacts during dynamic occlusions unideal

Answer 11

• teeth designed to absorb heavy forces in direction of tooth long axis - not laterally from occlusal interference
• in a mutually protected occlusion , musculature gets a rest as there is less activity when no posterior tooth contacts

Question 12

protrusive interference

Answer 12

any posterior tooth contact during protrusion

Question 13

eccentric bruxism

Answer 13

parafunctional grinding of teeth. Oral habit consisting of involuntary gnashing/grinding/ clenching of teeth without chewing movements

Question 14

centric bruxism

Answer 14

clenching - pressing and clamping of jaws and teeth together. Frequently associated with acute nervous tension or physical effort

Question 15

name 4 signs and symptoms of bruxism

Answer 15

tooth wear
fractured restorations
increased mobility in absence of perio
tooth migration
muscle pain and fatigue
headache
earache
pain and stiffness of TMJ

Question 16

Occlusal trauma

Answer 16

injury resulting in tissue changes within the attachment apparatus - PDLs , cementum, alveolar bone
primary - occurs on intact periodontium
secondary - occurs on reduced periodontium

Question 17

fremitus

Answer 17

palpable or visibe movement of a tooth when subject to occlusal forces

Question 18

what 6 things should be checked when examining occlusion

Answer 18

incisor relationship
guidance type
overjet/ overbite
ICP contacts
Working/ non working contatcs/ protrusive contacts
pathology