Occlusion Flashcards
Any tooth structure that interferes with the arc of closure has the primary effect of displacing the mandible … producing an…
- forward
- anterior slide
Line of closure interferences are those primary interferences that cause the madible to deviate… from the initial contact point (CO) to MI
right or left
If an interfereing incline causes the mandible to deviat toward the cheek, the grinding rule is
BULL
If an interfering incline causes the mandible to move toward the tongue, the grinding rule is
LUBL
The vertical dimension of occlusion (VDO) after equilibration at CR should… before adjustment
remain the same as
If forces that deviate mandible forward are eliminated, a… will be provided automatically
long centric
Lateral interferences (on opening) can be divided into 2 types
working side and non working side
Non working interferences grinding rule is… But as non working inclines are relivede , working may start to interfere so…
BULL
-usually both are adjusted together
Before adjustment of the excursions on the working side, it is necessary to determine the type of occlusion that would be best for the patient- … or…
group function
anterior guidance
patients with a large horizontal overlap benefit more from a… in working side excursions
group function
The basic rule for equilibriating working side is…
LUBL
the rule for eliminating protrusive interferences is
DUML
posterior determinants of mandibular movements (3)
- inclination of articular eminence
- medial wall of glenoid fossa
- intercondylar distance
Anterior determinants of mandibular movements
- horizontal overlap of ant teeth
2. vertical overlap of ant teeth
Other determinants of mandibular movements
- occlusal plane
- curve of spee
- neuromuscular response
class 1 is when the MB cusp of max 1st molar is centered on … of…
MB or buccal groove of mand 1st molar
class 2 is malocclusion where mandibular arch is… to max arch
posterior (overbite)
class 3 is malocclusion in which mandibular arch is… to max 1st molar
mesial (underbite)
… is the angle between sagittal plane and average path of nonworking condyle as viewed in transverse plane during lateral movement (fixed at 15 degrees in our articulators)
bennets
… is bilateral, simultaneous anterior and posterior occlusal contact of teeth in centric and eccentric positions, characteristic of heavily worn natural teeth and complete denture design
balanced articulation
… is mechanical form located on the upper-posterior region of an articulator that controls movement of its mobile member. This movement is intended to stimulate that produced by condyles in TMJ
condylar guidance
… is the path traveled by mandibular condyle in TMJ during mandibular movements
condylar path
… is an occlusal scheme in which the posterior teeth prevent excessive contact of the anterior teeth in MI and the anterior teeth disengage posterior teeth in all mandibular excursive movements
mutually protected articulation
… is an occlusion which exists in the absence of signs and symptoms of occlusion-related pathosis. Acceptability of occlusal variation and a sense of psychological and physical patient confor are implied
physiologic occlusion
… is malocclusion in which the mandibular teeth are located facial to ideal occlusal relationship with the opposing maxillary teeth when all are maximally occluded. it could involve entire mouth , specific segments, or one tooth
reverse articulation (crossbite)
… i simultaneous contact of most teeth on working side but no contact on nonworking side
unilateral balanced occlusion (group function)
Optimal … and…is when teeth have contact along CR, that contact if even across all teeth and force is well distributed (CO=MI)
arc of closure
line of closure
A non optimal arc of closure results in an… Grinding of will correct
anterior slide
MUDL
A non optimal line of closure results in a… A grinding of… will correct is deviation is toward cheek. A grinding of… will correct deviation toward tongue
deviation to left or right
BULL
LUBL
