Occlusion Test 1: SLIDES 18- 34: DIEWITT Flashcards
- Intercuspal positions
Where does the Distal cusp of the mand. first molar reside/occlude/situate with the opposing arch?
Distal fossa of the Max First Molar
- Intercuspal Positions
Where does the Mesiolingual cusp of Max 2nd Molar reside/occlude/situate with the opposing arch?
Central fossa of the Mand. 2nd Molar
- Pathways of Max Cusps Positioned over Mand Teeth
- Protrusion is parallel to what and travels in which direction?
Protrusion
- Parallel to central groove
- Travels posteriorly
- Pathways of Max Cusps Positioned over Mand Teeth
- “Working” - Parallel to what and travels in which direction?
Working
- Parallel to lingual groove
- Travels towards tongue
- Pathways of Max Cusps Positioned over Mand Teeth
- “Non-Working” - Parallel to what and travels in which direction?
Non-Working
- Parallel to distofacial groove on first molar
- Travels diagonally towards condyle
- Pathways of Max Cusps Positioned over Mand Teeth
- “Lateral Protrusive” - Located at what angle and between what two movements?
Lateral Protrusive
- Located at a 45 degree angle between protrusion and working movements
- Lingual cusp of Max left 2nd Pre-molar
- Where does this cusp “escape” or move during left lateral working movements?
Out lingual embrasure between mand second premolar and mand first molar
- Which movements that we have seen with the mandible are the best example of translation?
- (Lateral protrusive, non-working, protrusion, or working)
Protrusive is the best example of translation (movement of a body in the same direction and at the same rate)
- Terminal Hinge Axis
- Terminal hinge operates with what kind of movement?
- The condyles are ___ completely within the ___ fossa.
- This movement is consistent and ___.
- Rotational movement (from centric relation to terminal hinge axis position)
- Rotating completely; glenoid
- Reproducible
23. Border Movements in Sagittal Plane Which points are the: - Most anterior position? - Most inferior? - Most superior?
(CR, ETE, HA, HAT, HA-MO, MI, MO, MOA, or MP)
- Max Protrusion (MP)
- Max Opening (MO)
- Max Intercuspation (MI)
- Border Movements in Sagittal Plane
- At which of the following points will tooth contact occur?
(CR, ETE, HA, HAT, HA-MO, MI, MO, MOA, or MP)
CR (centric relation), MI (max intercuspation), ETE (edge to edge incisal), and MP (max protrusion)
The rest do not have tooth contact
- Funct. Range in Horizontal Border
- As the mandible opens, the size of the ___ plane border ___ (increases/decreases) until it reaches a “point” at the ___(max/min) opening position
- Horizontal plane border
- Decreases
- Maximum
- Border Movements in Frontal Plane
- Which positions exhibit tooth contact?
(ERL, ELL, MI, MO, and RP)
ERL (extreme right lateral), ELL (extreme left lateral), and MI (max intercuspation
(No tooth contact at RP or MO; Chewing loop not included)
- Mand Movement at Condylar level
- Horizontal plane at Mand central incisors
- What four positions can be seen?
(Choose from CR, LL, MO, MP, PRP, RL, and terminal edge)
CR (centric relation), LL (left lateral), MP (max protrusion), and RL (right lateral)
Cannot see MO, PRP, Chewing Loop, or Terminal Edge
- Mand Lateral Translation (Benneth Movement and Immed. Sideshift)
- This is the ___ part of lateral movement of the mandible, - This is depicted when the medial pole of ___ starts to travel down the slope of the ___ and against the ___.
- First part
2. Medial pole of the non-working condyles. Articular eminence; against the medial wall of the glenoid fossa
- Mand Lateral Translation is aka. _____ and _____
- This movement is exhibited as a measurement between the ___ and the ___.
- This movement is only measured on the ___ (working or non-working) side.
Aka: Benneth Movement and Immed. Sideshift
- Medial pole of the non-working condyle and the medial wall of the glenoid fossa
- Non-working side
- Define Condylar Guidance Angle
(“It is the angle between the ___ and the ___.”)
The angle between the condylar pathway and the horizontal plane
- Condylar Guidance Angle
- As the condyle moves out of ___ relation and descends along the ___, the rate at which it moves inferiorly depends on the ___ of the eminence
- Centric
- Articular Eminence
- Steepness or Flatness
- Condylar Guidance Considerations
- Temporomandibular joints are the ___ (anterior/posterior) controlling factors of mand movement
- Condyles are considered to be ___ (fixed/adjustable)
- Posterior
2. Fixed
- Condylar Guidance Considerations
- The ___ wall of the mand fossa is generally ___ (shallower/steeper) than the articular eminence. It is also a controlling factor contributor for the ___ (working/non-working) condyle or the ___ condyle
- Medial wall
- Steeper
- Non-working condyle
- Translating/Orbiting condyle
- Horizontal Overlap Change
- As Horizontal Overlap increases, the anterior guidance angle ___ (increases/decreases).
- An increase in Horizontal Overlap results in ___ (more/less) vertical displacement the mandible and flatter ___.
- Decreases
- Less
- Posterior cusps
- Coordinated Controlling factors of Movement
- What does PCF and ACF stand for?
- Since the PCR’s and ACF’s are causing the mandible to move horizontally and vertically at the ___ (same/different) rates, every point on the mandible is also moving away from the horizontal reference plane (HRP) at the ___ (same/different) rate.
- ACF/PCF - Anterior/Posterior Controlling Factors
- Same
- Same
- Distance of Tooth from Working Condyle
- The greater the distance of the tooth from the working condyle (axis of rotation), the ___ (wider/smaller) the angle formed by the ___ and ___ pathways
- Wider
2/3. Laterotrusive and mediotrusive pathways
- Effect of Intercondylar Distance on Ridge and Groove Direction
- The greater the intercondylar distances, the ___ (greater/smaller) the angle formed by the ___ and ___ pathways.
- Smaller angle
2/3 Laterotrusive and mediotrusive pathways
