Occlusion for Fixed Flashcards
During what phases should occlusion be evaluated?
All phases for best results
What 2 positions can you articulate casts in Fixed?
CR and MIP
For most dentate patients: an interocclusal record(s) should or should
not be used to articulate the dx casts in MIP ?
Should not
Occlusal records may be needed for ____ patients to be able to accurately and repeatedly articulate the casts properly
Partially dentate
Purpose of a ______: Orient the maxillary cast to
the rotational axis in three planes
facebow
_____ facebow
This face-bow is the most accurate (locates the TrueHingeAxis).
Requires training, elaborate instruments, and more time.
Kinematic Face-bow
_____ facebow
• Locates an arbitrary hinge axis by using anatomical landmarks
• Less accurate
• Requires less complicated instruments and less time.
Arbitrary Face-Bow
Will a full or small size articulator more likely cause intral oral interferences on a restoration especially if canine guidance is not present?
Small size
Provides record of the lingual concavity and incisal edge length / position
and therefore anterior guidance for replication when fabricating anterior
indirect restorations.
Custom incisal guide table
• Multiple, even, bilateral, simultaneous occlusal contacts of the posterior
teeth in MIP with the mandible is CR position i.e. MIP and CR are coincident.
• The anterior teeth exhibit lighter occlusal contacts as compared to posterior
teeth in MIP
• Posterior teeth are axially loaded in MIP
• In excursive movements there is canine guidance and anterior guidance
Mutually protected occlusion
- Cusps follow an anteroposterior curve
* Steepness of curve influences the cusp height
• Curve of Spee (A-P curve):
- Mediolateral curve
- Non-functional cusps shorter than functional cusps
- Helps prevent interferences in lateral excursions
• Curve of Wilson (M-L curve):
