quiz 2.1 Flashcards
What are the advantages of using Nonadjustable articulators?
- Disposable
- mounting procedures are ARBITUARY (small amount of time required to mount)
In a Laterotrusive movement, the angle which the ____-______ condyle moves _______ (as measured in the horizontal plant)
non-working, medially
Three concepts of the face-bow transfer
- Used the ORIENT and mount the MAXILLARY casts on the articulator relative to the joints
- Uses three distinct reference points (TWO posterior and ONE anterior
- Transfers the intercondylar distance of the patients to the articulator
describe where the two posterior and one anterior reference points are located on the face bow transfer
Posterior: Hinge axis of each CONDYLE
ANTERIOR: ARBITRARY, established by the manufacturer
Advantages and disadvantages of the fully adjustable articulator
- Articulator WILL duplicate patient’s mandibular movement
- When used properly restoration will PRECISELY fit the patient’s occlusal requirements (FEWER intraoral adjustments)
- EXPENSIVE (most important point), more sophisticated articulator + PANTOGRAPH)
the Mesio-lingual cusp of the maxillary first molar will shift the mandible to what direction?
laterotrusive or working pathway
What are the 5 points of the nature of the occlusal prematurities
1) These are recorded and recognized as a “HIGH” contact before the patient closses all the way into MAXIMUM INTERCUSPATION
2) First tooth contact in centric relation is a good example of an OCCLUSAL PREMATURITY
3) The term prematurity implies that the contact is either on an incline, or is in an area that in NOT CONSIDERED STABLE (for the teeth or the condyles
4) NONE of these contacts are proper maximum
5) The MANDIBLE can be DISPLACED anteriorly and or laterally
Contacts occurs on _______ teeth causeing the mandible to be _________ displaced
posterior, anteriorly
Describe an “A” contact
lingual inclines of maxillary facial cusps contactin facial inclines of mandibular facial cusps
Describe “B”contact
facial inclines of maxillary lingual cusps contactin lingual inclines of mandibular facial cusps
Describe “C” contact
lingual inclines of maxillary lingual cusps contactin facial inclines of mandibular lingual cusps
In non-woking interferences, where are the interfernces normally found (3)
- LINGUAL inclines of the mandibular POSTERIOR FACIAL cusps
- FACIAL inclines of the MAXILLARY POSTERIOR lingual cusps
- Parallel to the DISTAL OBLIQUE GROOVE, max 1st molar
_________ interferences usually cause ________ displacement of the mandible
non-working, lateral
Protrusive interferences
- DISTAL marginal ridges of the mandibualr posterior teeth
- MESIAL MARGINAL ridges of the MAXILLARY POSTERIOR TEETH
“A” contact will display mandibular deviation to the ______ side
OPPOSITE
“B” contacts will display mandibular deviation to the ______ ______ as the interference
Same Side
Initial TMJ dysfunction
- Retrodiscal Ligaments ELONGATE
- DISC MORPHOLOGY CHANGES
The etiology of temporomandibular dysfuction is ________ and ________
complex, multifactorial
What is the Etiology of TMD
- Predisposing factors: These WILL INCREASE risk
- INITIATING factors: these are responsible for the ONSET of the disease
- PERPETUATING factor: these will interfere with HEALING or ENHANCE progression of the disease
What are the 5 major factors of TMD
Occlusal Trauma Emotional stress Deep pain Parafunction
Mitigating factors of TMJ problems (7)
Anxiety fatigue stress overuse/inderuse of jaw poor sleep bruxism altered muscle contraction
Review Slide…
17
Lateral pterygoid disfunction usually refers pain to where?
Zygomatic Arch
TMJ
What are the symptoms of intracapsular TMD (4)
Joint sounds clicks and or popping crepitus (grinding noises) Limited opening with hard end feel deviation of deflection of mandible Pain during loading of the TMJ Sudden change in a patient's occlusion
what joint sounds are found in intracapsular TMD
clicks and/or popping
Crepitus (grinding noises)
What occurs when there is a limited opening with a hard end feel?
Deviation or deflation of mandible
What does ROM stand for?
RANGE OF MOTION
What does TMD stand for?
temporomandibular dysfunction
when opening the mandible, what would indicate a muscle problem
A soft end feel
The ROM _______ ____ may be increased slowly, because it may be painful and MUST be DONE with _____ by the clinicial
Maximum opening, Care
T or F If there is a HARD end feel the ROM can still be slowly and steadily increased
FALSE the ROM may not be increased due to the articular disc derangement
where do most parafunctional activities occur?
At a subconscious level, Clinicians must make the patient AWARE of this
T or F occlusal prematurities do not directly cause bruxing events?
TRUE
_______ _______ directly relates to the __________
Emotional stress, parafunction
what type of medication are most likely to cause an increase in bruxing?
Antidepressents
