EX1; Characteristics of Optimal Occlusion Flashcards
About what distance is strictly rotation, which puts you at risk of getting out of CR
25mm
In order to make sure you do not get out of CR, what measurement should be taken
5mm
When would you ignore the CO record and hand articulate into MI
when CO = MI
around 10% of cases
Which type of intercondylar distance would produce a larger mandibular lateral movement
wider
This is achieved only when the articular discs are properly interposed between the condyles and the articular fossa
optimal joint relationship; orthopedically stable joint position
In the optimal joint position, the articular surfaces and tissues of the joint are aligned such as what occurs
that the forces applied by the musculature of not create any damage
The musculoskeletally stable joint position can only be maintained when
it is in harmony with a stable occlusal plane; on multiple teeth on both sides of the arch
More teeth contacts provide what
more stabilization of the mandible and decrease the forces to each tooth
This type of contact of all teeth during mandibular closure is required for optimal functional tooth contacts
even and simultaneous
Which is ideal, CO coinciding with MI or CO slide
CO coinciding with MI
This does not tolerate pressure forces
osseous tissues
This is present between the roots and the alveolar bone to control occlusal forces
PDL
What are the two types of occlusion
cusp-fossa
cusp-marginal ridge occlusion
Which type of occlusion is more ideal
cusp-fossa
Where is the force directed in cusp-fossa occlusion
along the long axis
What are the two types of axial loading
cusp tip to flat surface
tripodization
Which class of levers is the TMJ
class III; least efficient of the classes
What are the fulcrum, load, and effort of the TMJ
fulcrum = joint load = bollus effort = muscles
In MI, the posterior teeth come into contact and act as what
a stop to minimize horizontal load on anterior teeth
The anterior teeth guide excursive movements of the mandible so that what does not occur
so that no posterior teeth contacts occur during lateral or protrusive excursions
What are the two types of anterior guidance
incisal guidance
canine guidance
What are seven effects of tooth loss
supraeruption tilting loss of contact loss of posterior tooth support loss of vertical dimension flaring of anterior teeth non-working inferences
One major goal of occlusal treatment is to direct occlusal forces along what
the long axes of teeth (stable posterior contacts)
One major goal of occlusal treatment is in MI position, all of the mandibular should contact their maxillary opponents when?
at the same time with the same intensity; CO=MI
One major goal of occlusal treatment is to furnish a smooth protrusive path guided by what
by the anterior teeth without any interference from occlusal contacts between the posterior teeth; (posterior disclusion)
One major goal of occlusal treatment is that working contacts (canine guidance or group function) should not be prevented from contacting by what
non-working interferences
Using diagnostic casts and a semi-adjustable articulator allows for what relationships to be seen
static and dynamic relations of the teeth without interferences from protective neuromuscular reflexes
What is the measurement of the arbitrary hinge axis
13 mm anterior to tragus on tragus-canthus line
What is the measurement of the kinematic hinge axis
pinpoint actual axis by means of pantograph
