natural vs denture occlusion Flashcards
why cant anterior guidance be achieved with dentures?
because it would dislodge the denture
stability of natural vs denture teeth?
natural are stabelized by peridontum, detures are by slippery tissues
pressures of occlusion of natural and denture teeth
natural receive individual pressures and can move independently. Denture all act as 1 unit.
vertical forces of natural and denture teeth
very well tolerated in natural teeth. Tramatic in denture teeth
incising with natural vs denture teeth
with natural teeth it doesnt affect the posterior teeth. Denture teeth all them move because they are all connected.
which molar is favored for mastication in natural teeth?
2nd molar
which one has more proprioception?
natural
key points of natural occlusion
bilateral posterior centric contact, anterior guidance, mutually protective scheme of occlusion
key points of complete denture occlusion
bilateral centric contacts, bilateraal eccentric contacts( which provides stability of base during functions)
fundamental differences of natural and complete denture occlusion are…..
- sensory feedback mech.
- derivation of retention, stability, support
- reaction of supporting structures to masticatory structures
what provides stability, retention, and support for natural teeth?
periodontium
what provides stability, retention, and support, for complete dentures?
soft tissues overlying residual bone ( ridges, buccal shelf, palate, etc…)
define retention
resistance to dislogment forces in vertical direction away from the bearing surface
define stability
resistance to laterally oriented dislodgment forces
define support
factors of the bearing surface which resist forces in a vertical direction towards the bearing surface.
reaction of supporting structures of natural teeth
physiologic levels of tension result in alveolar bone apposition
reaction of supporting structures of complete dentures
non-physiologic compression like under the denture base results in further residual ridge resoprtion.
name the 3 types of occlusion we know of so far….
balanced occlusion, monoplane, lingualized occlusion
define balanced occlusion
simultaneous contacting of maxillary and mandibular teeth on the right and left and in the posterior and anterior occlusal areas
why is balanced occlusion important?
on average tooth contact is about 4 hours a day. So they need to be balanced to maintain stability
things that help with balanced occlusion
wide large ridges, wide ridge with narrower teeth, lingually placed teeth, centered force of occlusion,
what does a smaller area of occlusal surface do ?
transmits a smaller crushing force to underlying structure
whats unilateral balanced occlusion?
occlusal surfaces of teeth on one side occlude simultaneously as a group
whats bilateral occlusal balance?
occlusion on both sides with centric and eccentric contacts
bilateral occlusal balance should have how many contact points?
3, ( 2 posterior, 1 anterior)
it is estimated that complete denture patients will increase from what to what from 1991 to 2020?
33.6 to 37.9 million
even though there has been a 10% decrease in edentulism for each decade the last 30 years, it will be offset by what
71% in adults older than 55
whats the difference between occlusion and articulation?
occlusion has to do with static relationships of teeth, articulation deals with the dynamic relationship of opposing teeth.
what is occlusion imporant with?
stability, retention
