Quiz 1 & 2 Flashcards
The masticatory system is made up of
a. bones
b. joints
c. ligaments
d. teeth
e. muscles
f. All of the above
g. d and e only
All of the above
The periodontal ligament acts as a natural shock absorber and its fibers run obliquely from the ______________ in a ______________ direction to the bone.
a. crown, coronal
b. gingiva, coronal
c. apex, horizontal
d. cementum, cervical
The periodontal ligament acts as a natural shock absorber and its fibers run obliquely from the CEMENTUM in a CERVICAL direction to the bone
The maxillary arch is slightly larger than the mandibular arch, which usually causes the maxillary teeth to overlap the mandibular teeth both vertically and horizontally when in occlusion.
True
False
TRUE
Which are the major skeletal components that make up the masticatory system?
a. frontal bone
b. maxilla
c. mandible
d. temporal bone
e. All of the above
f. b,c,d
g. a,b,c
B,C,D
The major skeletal components that make up the masticatory system include: the maxilla, mandible, and temporal bone
The temporomandibular joint has both gliding movements and hinging movements and is therefore called a
a. ginglymoarthrodial joint
b. simple hinge joint
c. multifunctional joint
d. parafunctional joint
Ginglymoarthrodial Joint
The articular disc of the temporomandibular joint is composed of
a. hyaline cartilage
b. dense fibrous connective tissue
c. avascular nerve bundles
d. highly vascularized cartilage
Dense Fibrous Connective Tissue
The ligaments of the temporomandibular joint are actively involved in joint function and allow for unlimited joint movements.
True
False
FALSE
The condyle and coronoid process are anatomically part of the
a. maxilla
b. temporal bone
c. mandible
d. none of the above
MANDIBLE
Which is not considered a muscle of mastication
a. masseter
b. temporalis
c. medial pterygoid
d. lateral pterygoid
e. none of the above
E. none of the above
The muscles of mastication include: masseter, temporalis, medial pterygoid, and lateral pterygoid
The condylar position, anatomically, at wide mouth opening is
a. in the posterior of the mandibular fossa.
b. in the middle of the mandibular fossa.
c. in the middle of the glenoid fossa.
d. near the crest of the articular eminence.
D. near the crest of the articular eminence
Which muscles play the major role in elevating the mandible for closing the teeth together?
a. Temporalis
b. lateral pterygoid
c. medial pterygoid
d. masseter
e. all of the above
f. a,c,and d only
A,C,D only
The muscles that play a major role in elevating the mandible for closing the teeth together are: temporalis, medial pterygoid, and masseter
The superior head of the lateral pterygoid muscle is most active during
a. yawning.
b. clenching.
c. speech.
d. none of the above.
B. clenching
Which muscle is primarily responsible for translation of the mandibular condyle during the opening movement?
a. deep portion of the medial pterygoid
b. middle portion of the temporalis
c. anterior belly of the digastric
d. inferior head of the lateral pterygoid
D. inferior head of the lateral pterygoid
The term power stroke refers to movements involving opening of the mandible against resistance.
True
False
FALSE
Which anatomic structure is considered a non-ossified bone that contributes to both rotation and translation of the condyle within the temporomandibular joint?
a. the retrodiscal lamina
b. the disc
c. the capsular ligament
d. pterygoid plate of the sphenoid bone
B. the disc
Normal biomechanical function of the TMJ must follow which orthopedic principles?
a. Ligaments do not actively participate in normal function of the joint.
b. Ligaments do not stretch.
c. The articular surfaces must be maintained in constant contact.
d. all of the above
D. All of the above
Normal biomechanical function of the TMJ must follow these orthopedic principles: ligaments do not actively participate in normal function of the joint, ligaments do not stretch, and the articular surfaces must be maintained in constant contact
Which are listed by Okeson as the three major functions of the masticatory system?
a. speech
b. mastication
c. kissing
d. swallowing (deglutition)
e. all of the above
f. a,b,and d only
A,BandD only
Three major functions of the masticatory system are: speech, mastication, and swallowing
Chewing strokes during mastication vary in intensity and directional movements according to which factors?
a. gender
b. consistency of the food
c. stability of the TM joint complex
d. functional state of the masticatory muscles
e. all of the above
f. b,c, and d only
All of the above
Neutral position of the teeth, where tooth stability is achieved, exists when the lingual forces and the labial forces are in equilibrium. It exists for both the anterior and posterior teeth.
True
False
TRUE
Match the neurologic structures to their respective functions.
a. nociceptors
b. proprioceptors
c. exteroceptors
d. interoceptors
receptors that carry information regarding the status of the internal organs, receptors that are specific for discomfort and pain, receptors that provide information of the conditions of the environment, or receptors that provide information regarding the position and movement of the mandible and associated oral structures
Interoreceptors: receptors that carry information regarding the status of the internal organs
Nociceptors: Receptors that are specific for discomfort and pain
Exteroceptors: sensory receptors found in the peripheral tissues such as the skin and oral mucosa. These provide information from the exterior tissues of the body informing the CNS of the conditions in the environment
Propioceptors: Receptors that provide information regarding the position and movement of the mandible and associated oral structures
