Chapter 12 Flashcards
Limit to placement of mandibular molars:
beginning of incline of retromolar pad (to prevent dislodgement) if no incline, then not over the retromolar pad
maxillary teeth should not be placed here posteriorily:
slope leading down to the hamular notches
Alignment of 1st premolar:
buccal of tooth aligns w buccal of canine, CG of first premolar aligns with either the contact point between the canine and lateral incisor or the tip of the canine
Man molar placement:
directly over residual ridge
CG alignment for premolars and molars:
directly over residual ridge and in lin e with each other
Vertical placement of mandibular posteriors:
plane of occlusion: middle to upper one-third of the retro-molar pad and midway bw max and man residual ridges and parallel to both ridges
If occlusal plane needs to be adjusted, should it be raised or lowered?
lowered, decrease height of teeth above mandibular residual ridges, decrease cantilever forces, and increases stability of mandibular denture`
Alignment of CG of 1st man premolar:
aligned along a line extending from the tip of the canine and the mesial contact point of the canine and lateral incisor (?)
Placement of most man posteriors should be here:
over residual ridge
Most important man tooth to center over the residual ridge:
most posterior man
The premolars are often placed buccal/ lingual to the residual ridge:
buccal
posterior plane of occlusion location:
at level of middle to upper one-third of the retromolar pad, midway bw opposing residual ridges, and parallel to both ridges
Order of placement of denture teeth:
max anterior, man anterior, man post, max posterior
primary goal in posterior tooth arrangement prior to the trial insertion appt:
attain CO contacts
Why is there less concern for potential excursive prematurities when setting teeth prior to the trial insertion?
potential for excursive prematurities for a nonbalanced occlusion are minimal, can’t be evaluated until the condylar inclination has been determined (hasn’t yet)
Max posterior tooth arrangement for a lingualized occlusal relationship, balance or not:
buccal cusps of opposing teeth about 0.5 mm above antagonist when articulator is moved into working position
Are cross-tooth contact of opposing working side posterior teeth indicated?
no
Max posterior tooth arrangement for conventional occlusal relationship:
B and L cusps of opposing teeth in intermeshing design, minimal space bw opposing occlusal surfaces, anterior and bilateral cross-arch contact in all excursive movements, and cross-tooth contact on the working side
Why not to align he buccal surfaces of the max and man teeth vertically?
may bite cheek
Why is buccal overlap of the posterior teeth needed?
to prevent cheek biting
Alignment of lingua cusps of max molars
CG and MR’s of opposing teeth
When don’t you have cross-tooth contacts?
lingualized occlusal relationship
This tooth might not be able to be placed directly into an ideal occlusal relationship
2nd molar, more important to be directly over the residual ridge
When might you need to create a cross bite in fabricating dentures?
resorptive patterns of the opposing ridges (a lot of bone resorption)
Resorption pattern of max and man after tooth extraction:
Man: down and out, Max, up and in
Cross bite is aka this in dentures:
full or complete reverse articulation
CG’s of all man posteriors should be within:
triangle: cusp tip of canine extended to the buccal and lingual aspect of the retromolar pad
Which cusps are the functional cusps in cross bite?
max B cusps
Partial reverse articulation:
cross bite in 2nd molar area and not the first premolar area, results in Man2P and Man1M being transition teeth
nonbalanced occlusion should exhibit this:
bilateral simultaneous contact of the posterior teeth for one or more millimeters around the centric occlusion position
Alignment of 3 most posterior denture teeth in partial cross bite:
Max2M: buccal cusp is functional, Max1M: B cusps in contact with B cusps of Man1M and Man2M
Which will have more excursive posterior contacts distributed over a wider range of movements, balanced occlusion or non-balanced occlusion?
balanced occlusion or nonbalanced occlusion
Posterior tooth contacts for nonbalanced occlusion excursive movements:
bilateral simultaneous contact of posteriors for one or more millimeters around centric occlusion position
Which will exhibit more excursive posterior contacts distributed over a wider range of movements, balanced or non-balanced occlusion?
balanced
Balanced occlusion contacts:
bilateral contacts of posterior teeth and simultaneous anterior contacts in all excursive movements
For a balanced occlusion to have good “timing,”:
one or more posterior contacts, bilaterally, must be maintained through the entire excursive movement. Ex: incisal edges of the opposing central incisors in contact w multiple contacts posteriorly
balanced occlusion, posterior contacts:
both bilateral contacts of the posterior teeth and simultaneous anterior contacts in all excursive movements.
Working and nonworking contacts should exist until:
working side canines are cusp tip-to-cusp tip
