Occlusal Analysis

Question 1

4 main reasons for completing an occlusal analysis?

Answer 1

1. ID of 1st contact (aka premature) in CR
2. Dx (diagnose) of CO/CR occlusal discrepencies and mandibular deviations
3. Prelim DX and TX planning of malocclusions
4. DX and TX planning of case type and design

Question 2

first contact (prematurity) in CR
EXAMPLE - and what happens

Answer 2

1st contact in CR most common in MOLAR REGIONS

1st contact in CR is #2 and #31 –> then slides into MIP (CO)

Question 3

in presence of CR/CO discrepency after the 1st tooth contact - what does mandible do?

Answer 3

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

Question 4

what often happens with angles class III?

Answer 4

often, incisors are edge-edge OR there is an underbite

Question 5

what occlusion often results with wear facets?

Answer 5

group or partial group function occlusion

Question 6

where do most interferences occur?

Answer 6

in protrusive

Question 7

DX and TX planning of case type and design (4th reason to complete an occlusal analysis)

Answer 7

1. alteration/improvement of plane of occlusion
2. possible “equilibration” of occlusal intereferences
3. mixed occlusal schemes
4. alteration of VDO (often reverse its loss)
5. large cases - tx and case presentation - full arch rehab and resote and anterior esthetic reconstruction

Question 8

what do you always do before you treat?

Answer 8

ALWAYS DX AND TX before you treat – the OA (occlusal analysis) is a critical piece of the treatment planning

Question 9

examples of 1st contact (premature) in CR?

Answer 9

1st contact may be 16 contacting 17 or 2 and 31

Question 10

angels classification looks at relationship of which teeth?

Answer 10

molar and canine positions

Question 11

long definition of occlusal analysis

Answer 11

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

Question 12

mixed occlusal schemes

Answer 12

fixed/ remo cases
fixed partial dentures with RPD’s, etc

examples of why you need to do an occlusal analysis

Question 13

of etiology of loss of vertical

Answer 13

trauma
traumatic gingivitis
ware on the teeth

MULTIFACTORIAL - most likely

Question 14

how many steps in the lab manual to ID’ing occlusal discrepencies between CR and MIP?

Answer 14

9 steps

Question 15

First step in ID’ing occlusal discrepencies between CR and MIP?

Answer 15

Record you INCISAL PIN SETTING at your present mounting in CR

Question 16

Steps 2-4 in ID’ing occlusal discrepencies between CR and MIP?

Answer 16

2.

Question 17

Angles Class II Division I

Answer 17

Division 1- proclination of incisors and often excess overjet

notice the ‘CANT’ of the anteriors

Question 18

angles class III Division II

Answer 18

Retroclined incisors

anteriors ARE LINGUALIZED (as opposed to overly forward)

Question 19

angles class III Division II

Answer 19

Retroclined incisors

anteriors ARE LINGUALIZED (as opposed to overly forward)

Question 20

characteristic of group or partial group function

what to look specifically for in these patients

Answer 20

common but NOT IDEAL in the NATURAL dentition

WARE FACETS

Question 21

ideal guidance in NATURAL dentition?

Answer 21

CUSPID guidance/ protection with 100% non-working side DISCLUSION – ideal in the natural dentition

Question 22

ideal guidance in NATURAL dentition?

Answer 22

CUSPID guidance/ protection with 100% non-working side DISCLUSION – ideal in the natural dentition

Question 23

what constitutes the IDEAL, most STABLE ATURAL Dentition Occlusion? When…

Answer 23

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