Occlusal Analysis Lab Exercise by A6LxG4PK

VIEWS: 41 PAGES: 22

									Occlusal Analysis Lab Exercise

   Evaluation of casts or study
   models to identify occlusal
     problems and clinical
         considerations

          Charles J. Arcoria, DDS, MBA
                Objectives:
From a lab perspective, we need to be conscious
  of the following:
  Organize your mind
  Structure the clinical sequence in an ordered
  fashion
  Identify features
  Apply knowledge you have received
  Spend some time doing this important exercise
  Document findings
               Occlusal Analysis In Lab




On each set of casts, you will analyze the following categories and note it on the above QA Form:
1.  Angle’s Classification of Occlusion for both sides
2.  Is the Working side disocclusion canine guided or group function
3.  Are there any non-working interferences? Note which side that they are on.
4.  Is their a posterior cross-bite?
5.  Is their an anterior cross-bite?
6.  Note and mark any wear facets.
     Note: The Occlusal Analysis is accomplished before the Occlusal
              Adjustment and Occlusal Splint are performed.
 Clinical Items to Identify regarding
  Occlusal Morphology on Casts
1. Classification of occlusion (I, II, III?)
2. Occlusal plane construct (flat or curved?)
3. Guidance scheme – (Canine or group function?)
4. Horizontal and vertical overlap (adequate?)
5. Cusp and ridge height (flat or substantial?)
6. Identification of missing teeth
7. Tooth and inter- or intra- arch alignment
8. Tooth rotation
9. Multiple point contacts on posterior teeth?
10. Location of wear facets
11. Presence of abfractions
12. Identification of crossbite relationships
Angle’s Classifications
    Plane of Occlusion
The plane is not flat
A flat plane will not permit a simultaneous
function contact in more than one area of
the dental arch
A curved plane permits
maximum use of tooth
contacts during function
Teeth are positioned in
the arches at varying
degrees of inclination
Proper Horizontal & Vertical Overlap

Most anterior contacts
Anterior coupling
Vertical and
horizontal overlap
  Cusp and Ridge Height



Size
Positions
Wear
Identification of Missing Teeth
                &
    Alignment of the Teeth

Arch size
Rotations
Oral habits
Missing teeth
Intra-arch Alignment of Teeth
                            “An imaginary
                            line that
                            extends from
                            the cusp tip of
                            the mandibular
                            canine along
                            the facial cusp
                            tips of the
                            posterior teeth
 Maxillary arch = convex    resulting in an
                            anteroposterior
Mandibular arch = concave   curve”
     Curve of Spee
Angulation of the
Mandibular Teeth
   (Sagittal View)


                       SINGLE-ROOTED
                       TEETH
                        Incisors
                         Canines
                         Premolars

                     MANDIBULAR MOLARS
                      Mesial roots
                      Distal roots
Multiple Contacts on Posterior Teeth



                A   B C
                   Occlusal Wear
Wear facets Outline them with a pencil
– Parafunction or normal wear?
– Ongoing or previous bruxism?




       Attrition                   Occlusal Wear
Abfractions
Identification of Crossbite
       Relationships




  Posterior            Anterior
              Cast 1:
These are your Occlusal Adjustment
   (White Orthostone) Mounting
Cast 2
Cast 3
Cast 4
             Occlusal Analysis QA Form




On each set of casts, you will analyze the following categories and note it on the above QA Form:
1.   Angle’s Classification of Occlusion for both sides
2.   Is the Working side disocclusion canine guided or group function
3.   Are there any non-working interferences? Note which side that they are on.
4.   Is their a posterior cross-bite?
5.   Is their an anterior cross-bite?
6.   Note and mark any wear facets.
There are only 4 Casts, even
   though the form has 5
     analyzing sections
Occlusal Analysis Lab Exercise
            The End

								
To top