Occlusion 2 Flashcards
how do you mark tooth contacts
millers forceps and fine articulating paper
when do you mark tooth contacts
before preparing a tooth and removing restoration
after placement of a crown and restoration
what do tripodised contacts show
where the opposing cusps contact
(ICP stops)
what do you look at in static occlusion
incisor relationship
molar relationship
overjet/overbite
cross bites
open bites
individual contacts
RCP-ICP slide
what are functional cusps
cusps that occlude with opposing teeth in ICP
lingual cusps of uppers
buccal cusps of lowers
what are non-functional cusps
cusps that do not occlude with opposing teeth in ICP
buccal cusps of uppers
lingual cusps of lowers
what is a fossa
depression on tooth surface
what are the ICP contacts
lingual cusp of upper molar contacts fossa of lower molar
buccal cusp of lower molar contacts fossa of upper molar
how do you view ICP contacts
get patient to tap
what is overjet
relationship between upper and lower teeth in a horizontal plane
what is overbite
vertical overlap of incisors
what is crossbite
one or more teeth abnormally positioned buccal or lingually or labially with reference to opposing teeth
what is an anterior open bite
lack of vertical overlap of anterior teeth when posterior teeth in full occlusion
what is posterior open bite
failure of contact between posterior teeth when teeth are in full occlusion
what is canine guidance
mandible moves to working side and there is only contact between canines
what is a mutually protected occlusion
canine guidance
posterior disclusion in lateral excursions
no non-working/working side contacts
no protrusive interferences
what is group function
mandible moves to working side and multiple teeth contact
what type of group function is seen in toothwear
bilateral
what are the only teeth that touch in protrusion of mandible
incisors and canines
what are occlusal interferences
undesirable tooth contacts that can produce mandibular deviation during closure to ICP or hinder smooth passage to and from ICP
what are the types of occlusal interference
working side
non working side
protrusive
what is a working side interference
when teeth slide to the working side there are contacts on posterior teeth with similar cusps (buccal cusps contact)
what is non working side interference
mandible slides to working side and there are contacts on the non-working side with dissimilar cusps (upper lingual cusps and lower buccal cusp)
what is protrusive interference
any posterior contact during protrusion
why do you want to avoid posterior contacts
not designed to absorb lateral forces
musculature gets a rest if no contacts
occlusal trauma and undesirable tooth movements
what are the 2 types of bruxism
eccentric
centric
what is eccentric bruxism
parafunctional grinding of teeth
what is centric bruxism
clenching
what are the clinical signs of bruxism
toothwear
fractured restorations
tooth migration
tooth mobility
muscle pain and fatigue
headache
earache
pain and stiffness in TMJ and surrounding muscles
what are the types of toothwear
multifactorial
abrasion
attrition
erosion
abfraction
what are the types of toothwear classified as
mild
moderate
severe
what is primary occlusal trauma
occlusal trauma with an intact periodontium
what is secondary occlusal trauma
occlusal trauma with a reduced periodontium
what is fremitus
palpable or visible movement of a tooth when subjected to occlusal forces
what is the examination checklist for occlusion
incisor relationship
guidance
overjet/overbite
ICP contacts
working/non-working/protrusive contacts
pathology
