TMD Exam 1 Flashcards
___________ must be understood before dysfunction can have meaning
Function
Functional unit of the body responsible for chewing, speaking, and swallowing while also playing a major role in tasting and breathing
Masticatory system
Understanding of the masticatory system’s functional anatomy and biomechanics is essential to the study of _____________
occlusion
Hypothetical concept or a standardized goal
Ideal
Implies the variations around an average mean value
Normal
Describe ideal occlusion
Coincident midline
No crowding, spacing, rotation
Overjet 1-3mm
Overbite 15-20%
Correct crown angulation, inclination
Class I molar/canine relationship
Flat or slightly upward curve of spee
Describe normal occlusion
Some deviation from ideal, but esthetically acceptable and functionally stable
Upper and lower teeth fit nicely and evenly with the least amount of destructive interferences
Criteria for ideal occlusion
What should the vertical contact during closure be?
Distributed evenly and simultaneously
Primarily on posterior teeth
Criteria for ideal occlusion
What should the lateral movement contact on the working side be?
On teeth most capable of bearing the load, usually canines
Criteria for ideal occlusion
What should the lateral movement contact on the non-working side be?
NONE, it should not exist
Criteria for ideal occlusion
What should the protrusive movement contact be?
On anterior teeth only
The ____________ cusp of the upper 1st molar should hit the _________ groove of the lower 1st molar
mesiobuccal; buccal
Orthognathic
Class I
Retrognathic
Class II
Prognathic
Class III
What are the 3 mandibular positions?
Centric relation
Centric occlusion
Maximal intercuspal position
Most orthopedically stable joint position
Centric relation
The maxillomandibular relationship in which the condyles articulate, with the articular discs properly interposed, in the most antero-superior position against the posterior slope of the articular eminences
Centric relation
Adequate position
Relaxed muscles
Independent from teeth
Position can be repeated
Centric relation
Occlusion of opposing teeth when mandible is in centric relation
Centric occlusion
May or may not coincide with maximal intercuspal position
Centric occlusion
Maximum occlusal inter-arch contact irrespective of condylar position
Maximum intercuspal position
May or may not occur in the path of centric relation
Maximum intercuspal position
Bad bite
Malocclusion
Closing up bite
Occlusion
