Occlusion Quiz 2 Flashcards
Name 4 Features of the non-adjustable Articulator
- inexpensive
- the plastic types of these are Disposable
- a SMALL Amount of time is required to mount the casts on this articulator
- it is used primarily for Single Restorations, provided that the Anterior Guidance is available
In a laterotrusive movement, the Angle at which the non-working condyle moves Medially as measured in the horizontal plane, is called?
Bennett Angle
T/F
The facebow transfer apparatus is used to orient and mount the MAXILLARY cast on the articulator relative to the joints.
True
T/F
The facebow transfer apparatus utilizes three distinct reference points (two that are located in the posterior region at the condyles, and one located in the anterior region).
True
What is the disadvantage in using a fully adjustable articulator
Cost
What is the occlusal pathway on the mesiolingual cusp of a maxillary first molar that is exhibited as travelling from the central groove on the mandibular first molar, out the lingual groove toward the tongue?
Laterotrusive
Occlusal Prematurities are recorded and recogonized as _____ contact before the patient closes all the way to _______.
High
Maximum Intercuspation
A good example of Occlusal Prematurity is…
1st tooth contact in Centric Relation
What 2 things does Occlusal Prematurity imply?
Contact on Incline
Contact in area NOT considered Stable (for teeth and/or condyles)
How many proper Maximum Intercuspation contacts are seen in Occlusal Prematurity?
None
In what 2 directions can the mandible be displaced in Occlusal Prematurities?
Anteriorly
and/or
Laterally
T/F
First tooth contact in maximum intercuspation is a good example of an occlusal prematurity
All of these contacts are proper maximum intercuspation occlusal contacts
False
Forward displacement of the mandible is typically caused by occlusal or incisal contact occurring on _______ teeth causing the mandible to be ________ displaced.
Posterior
Anteriorly
Possible occlusal contact areas which cause lateral displacement of the mandible, exhibited as the Lingual Inclines of Maxillary Facial cusps touching the facial inclines of mandibular facial cusps, are called
“A” contacts
T/F
Non-working Interferences occur on facial inclines of the maxillary posterior lingual cusps AND are parallel to the distal oblique groove on maxillary first molars
True
T/F
Non-working Interferences occur on facial inclines of the mandibular posterior lingual cusps
Are parallel to the mesiofacial developmental groove on mandibular first molars
Never cause lateral displacement of the mandible
False
- Lingual Inclines
- *Distofacial
- **Cause lateral displacement
What are the occlusal prematurities that are exhibited on the distal marginal ridges of the mandibular posterior teeth?
Protrusive Interferences
What is the closure interference that involves Maxillary facial cusp to mandibular facial cusp contact, with deviation of the mandible to the Opposite side of the interference?
“A” contact
The closure interference known as a “B” contact will display mandibular deviation…
To the Same Side as the interference
T/F
Regarding initial temporomandibular joint dysfunction in a patient, the retrodiscal ligaments shorten and the articular disc morphology exhibits remains static.
False
- Elongates
- *Changes
T/F
A slight abnormal translation also occurs between the condyle and the articular disc in TMJ anatomy
True
T/F
The etiology of TMD (temporomandibular dysfunction) is complex and multifactorial
True
Name 3 major factors included in the evolution of TMD
Predisposing factors (increase risk) Initiating factors (onset) Perpetuating factors (interferes with healing or enhances progression)
Name 5 major factors of TMD
Occlusal Trauma Emotional Stress Deep Pain Parafunction
T/F
TMD exhibits predisposing factors that are responsible for the onset of the disease
The initiating factors are responsible for increasing risk
The major factors causing temporomandibular dysfunction are only emotional stress and normal functional activities
False
Name 5 mitigating factors exhibited in patients with extracapsular temporomandibular joint problems
*2 more?
Anxiety Fatigue Stress Overuse/Underuse of mandible Bruxism
(also Poor Sleep and Altered Muscle Contraction)
T/F
Adequate sleep and normal muscle contraction can lead to extracapsular TMJ problems
False
A trigger point on the masseter muscle can exhibit or refer pain to which area in the head and neck?
Maxillary Posterior Teeth
The trigger point on the lateral pterygoid can refer pain to what 2 areas?
Zygomatic arch and Temporomandibular Joint
T/F
Extensive mandibular opening with a soft end feel is common in Intracapsular Temporomandibular Disease
False
*limited opening and Hard End feel
Name 5 symptoms of Intracapsular Temporomandibular Disease
Joint sounds Limited opening with Hard End feel Mandibular deviation Pain during TMJ loading Sudden change in occlusion
What is the clinical range of motion condition that is representative of an extracapsular problem in the temporomandibular joint?
Soft End Feel in mandibular opening movement
T/F
Occlusal prematurities directly cause bruxing events
False
Name 6 Parafunctional Activities and Features.
Clenching Bruxism (tooth grinding) Most Subconscious Don't Directly cause bruxing Directly related to Emotional Stress Drugs increase bruxing
(serotonin re-uptake inhibitors and other antidepressants)
