Occlusion Flashcards
What is occlusion?
Occlusion is the STATIC relationship of teeth
What is maximum Intercuspation
It is the complete intercuspation of the opposing teeth, INDEPENDENT of condylar position
What does habitual occlusion?
In CHEWING where the maximum contact between teeth occurs
Occlusal disease
It is a deformation or disturbance of function of any structure within the masticator system that are in this equilibrium with a harmonious interrelationship between the
TMJ
Masticatory musculature, and
the occlusing surface of teeth
Potentially damaging factors in occlusion
Marginal Ridge discrepancies
Extruded teeth
Wide occlusal tables resulting from excessive wear
Deep overbite with minimal overjet
Destructive occlusion forces can be reduced by
Selective grinding
Orthodontics
Restorative treatments
Tooth extraction
What’s important objective of occlusion adjustments?
To achieve a more favourable direction and distribution of forces of occlusion
Interferences
Should be corrected BEFORE starting any restorative treatment
Maxillary lingual cusps of max. 4
In the DTF of mandible 4
Maxillary lingual cusps of max. 5
In the DTF of mandibular 5
MLC of Maxillary first molar
MLC—-CF of mandibular first molar
DLC —-DMR of mandibular, first molar and MMR of mandibular second molar
Maxillary lingual cusps Maxillary 7
MLC—-CF of second molar
DLC —-DMR of second molar and MMR of third molar
Mandibular buccal cusps of 4
MTF of 4 and DMR of 3
Mandibular buccal cusps of Second premolar
MTF of second premolar
Mandibular buccal cusps of first molar
MBC—-MMR or first molar and DMR of second premolar
DBC —-CF of first molar
Distal —-DF of first molar
Mandibular buccal cusps of second molar
MBC—-MMR of second molar and DMR off first molar
DBC —— CF of second molar
Bilaterally balanced articulation
Maximum number of teeth in contact in maximum Intercuspation ….and all excursive positions
Bliterally balanced articulation
Complete denture fabrication.
This tooth arrangement helps to maintain DENTURE sTABIlITy
Uniliterally balanced articulation
group function
Excursive contacts occur between all opposing posterior tooth on laterotrusive or the working side only
In protrusive movements,no posterior teeth contact
Mutually protected articulation
the overlap of anterior teeth prevents posterior teeth from making any contact on either working or not working site during mandibular excursion
this separation from occlusion was termed disocclusion
mutually protected articulation
also called canine protected, occlusion or organic occlusion
Mutually protected articulation
The anterior teeth bear the entire load
the posterior teeth, disoccluded in any excursive position of the mandible
the desired result is an absence of frictional wear
forces in mutually protected articulation
All posterior teeth are in contact with the forces, being directed along the long axis
The anterior teeth, either contact likely or are very slightly out of contact, approximately 25 micron, relieving them of the obliquely directed forces that would be the result of anterior tooth contact
To reconstruct them out with a mutually protected occlusion
Teeth should be periodontal he healthy
if anterior bone loss or missing canines
Restore temptation by group function (unilateral balance)
In mutually protected articulation
CR=IC
CR coincides with maximum interception position
contraindications of a reverse occlusion, or a cross bite
Class two or a class three malocclusion, where the mandible cannot be guided by the anterior teeth,
so we cannot use a mutually protected occlusion
and I didn’t occlusion will have on the working side
Canine guidance or group function
In a mutually protected occlusion fabricating in FPD’s from tooth 11 to 13
requires an incisal guides table
