Occlusal Analysis Flashcards
4 main reasons for completing an occlusal analysis?
- ID of 1st contact (aka premature) in CR
- Dx (diagnose) of CO/CR occlusal discrepencies and mandibular deviations
- Prelim DX and TX planning of malocclusions
- DX and TX planning of case type and design
first contact (prematurity) in CR EXAMPLE - and what happens
1st contact in CR most common in MOLAR REGIONS
1st contact in CR is #2 and #31 –> then slides into MIP (CO)
in presence of CR/CO discrepency after the 1st tooth contact - what does mandible do?
mandible will SLIDE/DEVIATE to varying degrees and in varying directions until the teeth are in MIP.
left deviations, right deviations, or S shaped deviations (left to right or right to left) are all possible
what often happens with angles class III?
often, incisors are edge-edge OR there is an underbite
what occlusion often results with wear facets?
group or partial group function occlusion
where do most interferences occur?
in protrusive
DX and TX planning of case type and design (4th reason to complete an occlusal analysis)
- alteration/improvement of plane of occlusion
- possible “equilibration” of occlusal intereferences
- mixed occlusal schemes
- alteration of VDO (often reverse its loss)
- large cases - tx and case presentation - full arch rehab and resote and anterior esthetic reconstruction
what do you always do before you treat?
ALWAYS DX AND TX before you treat – the OA (occlusal analysis) is a critical piece of the treatment planning
examples of 1st contact (premature) in CR?
1st contact may be 16 contacting 17 or 2 and 31
angels classification looks at relationship of which teeth?
molar and canine positions
long definition of occlusal analysis
is a medium by which a patients occlusion, through diagnostic interpretation, data gathering, and notation can be visualized and fully comprehended for use by the dentist and dental team for purposes of case type determination(1,2, or 3), treatment plan preparation and presentation, and eventually, as needed, comprehensive quality dental care delivery
mixed occlusal schemes
fixed/ remo cases
fixed partial dentures with RPD’s, etc
examples of why you need to do an occlusal analysis
of etiology of loss of vertical
trauma
traumatic gingivitis
ware on the teeth
MULTIFACTORIAL - most likely
how many steps in the lab manual to ID’ing occlusal discrepencies between CR and MIP?
9 steps
First step in ID’ing occlusal discrepencies between CR and MIP?
Record you INCISAL PIN SETTING at your present mounting in CR
Steps 2-4 in ID’ing occlusal discrepencies between CR and MIP?
2.
Angles Class II Division I
Division 1- proclination of incisors and often excess overjet
notice the ‘CANT’ of the anteriors
angles class III Division II
Retroclined incisors
anteriors ARE LINGUALIZED (as opposed to overly forward)
angles class III Division II
Retroclined incisors
anteriors ARE LINGUALIZED (as opposed to overly forward)
characteristic of group or partial group function
what to look specifically for in these patients
common but NOT IDEAL in the NATURAL dentition
WARE FACETS
ideal guidance in NATURAL dentition?
CUSPID guidance/ protection with 100% non-working side DISCLUSION – ideal in the natural dentition
ideal guidance in NATURAL dentition?
CUSPID guidance/ protection with 100% non-working side DISCLUSION – ideal in the natural dentition
what constitutes the IDEAL, most STABLE ATURAL Dentition Occlusion? When…
Posterior teeth protect anterior teeth
- posterior teeth protect the anterior teeth by providing a stable VDO
ANTERIOR teeth protect the posterior teeth
- bilateral cuspid guidance (rise or protection)
-includes posterior disclusion in lateral movements
+ Anterior guidance - induces posterior disclusion in protrusive
