Le1.Occlusal Equilibriation-Selective Grinding (Review) Flashcards Preview

Fixed Prosth Midterm > Le1.Occlusal Equilibriation-Selective Grinding (Review) > Flashcards

Flashcards in Le1.Occlusal Equilibriation-Selective Grinding (Review) Deck (13)
Loading flashcards...

Rule #3 of the rules of occlusion states that supporting cusp tips rest in marginal ridge areas EXCEPT: What?

MesioLingual cusps of MaxiLlary molars
DistoBuccal cusps of manDiBular molars
-Both rest in opposing fossa


What are the guiding inclines?

Inner inclines of the non-supporting cusps


What is the FOA?

FOA = Functional Outer Aspect = Outer incline of the supporting cusp. Opposes the guiding inclines of the opposite tooth.


When selective grinding what are the only cusps you are supposed to grind?

Supporting cusps


What is the goal in stage 1 of the selective grinding procedure?

Stage 1: Achieve balanced occlusion
Goal = CR = ICP


In stage 1 where are you allowed to grind? Molars & anteriors?

Molars: Grind on INCLINES of SUPPORTING cusps only. Note: If two marking on supporting cusps, grind mark Closest to cusp Tip.
Anteriors: Grind on FACIAL of Mandibular anterior teeth


What is done in stage II of selective grinding?

Stage II: Define functional outer aspects.
1.Use articulating paper & guide mandible into lateral excursions.
2.FOAs narrowed until they are 1mm wide
3.Once established, DO NOT reduce in subsequent steps


What is done in stage III of selective grinding? (5 things)

Stage III: Establish freedom of mandibular movement
1. Eliminate non-working interferences
2. Eliminate cross tooth working interferences
3. Eliminate working interferences
4. Eliminate protrusive interferences
5. Establish canine guided occlusion


If mandibular movement is to the left, where might non-working interferences occur?

On the supporting cusp's inner inclines on the right side of the arch


Are cross-tooth interferences on working or non-working side?



If the mandible is being moved to the right, where would you find possible cross tooth working interferences?

On the right (working) side of the arch, occurs at the FOAs of the maxillary lingual cusp and mandibular guiding inclines


If the patient moves their mandible to the right, where might you see working interferences?

On the right side of the arch, at the FOA of the mandibular supporting cusp against the maxillary guiding incline


What are protrusive interferences?

During protrusive movements, incisal guidance should result in the disarticulation of posterior teeth (From distal inclines of mandibular 1st PMs back).