Occlusion Test 1: SLIDES 10-17 Flashcards
SLIDE 10: ACTION of BOTH HEADS of the LATERAL PTERYGOID MUSCLES
- Both portions of the lateral pterygoid muscle play EQUALLY SIGNIFICANT, but _________________( same or different) roles in MANDIBULAR movement.
- When one head of the lateral pterygoid head is ________ (inactive or active), the other is _____( minimally or constantly) contracting.
- The coordination of normal activity for each lateral pterygoid muscle head is _____________ (not or very critical) and the lack of this coordination ________ ( causes or does not cause) breakdown of normal functioning of the craniomandibular apparatus.
- Both portions of the lateral pterygoid muscle play EQUALLY SIGNIFICANT, but DIFFERENT roles in MANDIBULAR movement.
- When one head of the lateral pterygoid head is ACTIVE, the other is MINIMALLY contracting.
- The coordination of normal activity for each lateral pterygoid muscle head is VERY CRITICAL and the lack of this coordination CAUSES breakdown of normal functioning of the craniomandibular apparatus.
SLIDE 11: SUPRAHYOID ACCESSORY MUSCLES
Collective action or function of the suprahyoid accessory muscles of mastication:
1) _________ (Depress or elevate) hyoid bone
2) ________ (Depress or elevate) the base of the tongue
3) _______ (Depress or elevate) the mandible when hyoid bone is fixed.
4) Assist in STABILIZING the ______ and the ____ (name the structures) during NORMAL mandibular movements
5) Important for control over the PHARYNX and ESOPHAGUS during __________ and _________ (name the activity) activities.
Collective action or function of the suprahyoid accessory muscles of mastication:
1) ELEVATE hyoid bone
2) ELEVATE the base of the tongue
3) DEPRESS the mandible when hyoid bone is fixed. (depress= opening mouth)
4) Assist in STABILIZING the CRANIUM and MANDIBLE during NORMAL mandibular movements
5) Important for control over the PHARYNX and ESOPHAGUS during SWALLOWING and SPEAKING activities.
Suprahyoid: NOT a major muscle in depressing the mandible when the hyoid bone is fixed.
SLIDE 12: POSTERIOR NECK MUSCULATURE
Which two muscles display the MOST problems as a result of occlusal or temporomandibular dysfunction.
1) STERNOCLEIDOMASTOID
2) TRAPEZIUS
Usually causes spasm and stiffness.
SLIDE 13: INTRA-ARCH ALIGNMENT of TEETH
The maxillary ____________ (name the tooth) and mandibular __________ (name the tooth) have only _______ (#) ANTAGONIST in the opposing arch.
The maxillary THIRD MOLARS And the mandibular CENTRAL INCISORS have only ONE antagonist in the opposing arch.
SLIDE 14: ANGULATION of the MANDIBULAR TEETH
– SAGITTAL VIEW:
SINGLE-ROOTED TEETH:
INCISORS and CANINES
– ________________ (Anteriorly or posteriorly) positioned in comparison to the VERTICAL axis.
SINGLE-ROOTED TEETH:
INCISORS and CANINES
– ANTERIORLY positioned in comparison to the VERTICAL axis.
SLIDE 14: ANGULATION of the MANDIBULAR TEETH
– SAGITTAL VIEW:
SINGLE-ROOTED TEETH:
PREMOLARS
– How are they positioned in comparison to the VERTICAL axis
SINGLE-ROOTED TEETH:
PREMOLARS
– ALMOST LINED UP to the VERTICAL axis
SLIDE 14: ANGULATION of the MANDIBULAR TEETH
– SAGITTAL VIEW:
MANDIBULAR MOLARS:
MESIAL AND DISTAL ROOTS
– How are they positioned in comparison to the vertical axis
MANDIBULAR MOLARS:
MESIAL AND DISTAL ROOTS
– ANTERIORLY positioned in comparison to the vertical axis
SLIDE 14: ANGULATION of the MANDIBULAR TEETH
SAGITTAL VIEW:
- Which teeth are INCLINE toward the mesial and anterior region.
- Which teeth are almost lined up with the vertical axis.
ANTERIOR TEETH AND MOLARS are incline toward the mesial and anterior region.
– The PREMOLARS are almost lined up with the vertical axis.
(NOT ANTERIOR AND MOLARS)
SLIDE 15: PLANE OF OCCLUSION
List the two COMPENSATING OCCLUSAL CURVATURE:
- The IDEAL plane is _________ (flat or not flat)
- A flat plane allow for _______ (too many or too little contacts) on most ____________ (anterior or posterior teeth) on both sides of the mouth
- The proper plane of occlusion will permit _________ (nonsimultaneous or simultaneous) functional contacts to occur in ____________ (noncontrolled or controlled) areas of the dental arch.
- A curve plane permits ____________ (minimum or maximum) use of tooth contacts during function.
- The teeth are strategically positioned in the arches at VARIED and __________ (coordinated or uncoordinated) degrees of inclination.
- CURVE OF SPREE (UPPER), CURVE OF WILSON (LOWER)
- The IDEAL plane is NOT FLAT.
- A flat plane allow for TOO MANY CONTACTS on most POSTERIOR TEETH on both sides of the mouth
- The proper plane of occlusion will permit SIMULTANEOUS functional contacts to occur in CONTROLLED areas of the dental arch.
- A curve plane permits MAXIMUM use of tooth contacts during function.
- The teeth are strategically positioned in the arches at VARIED and COORDINATED degrees of inclination.
SLIDE 16: ENGINEERING and BIOMECHANICS
CLASS 1 LEVER DESIGN:
Because the fulcrum is in the middle with the load and effort on opposite sides, the forces applied will be _________ (minimal or at the greatest), ___________ ( a lot of work or very little work) will be done, but the subject will have a dentition for ________ (a long time or a short period of time)
CLASS 1 LEVER DESIGN:
Because the fulcrum (condyles) is in the middle with the load (teeth) and effort (muscle) on opposite sides, the forces applied will be MINIMAL, VERY LITTLE WORK will be done, but the subject will have a dentition for a long time.
SLIDE 16: ENGINEERING and BIOMECHANICS
CLASS 2 LEVER DESIGN:
Because the effort is on the _____________ (same or opposite) end of the fulcrum, a significant amount of work can be done on the load. Unfortunately, the load will be ___________ (destroyed or normal) in a _________ (shortened or long) period of time.
CLASS 2 LEVER DESIGN:
Because the effort is on the OPPOSITE END of the fulcrum, a significant amount of work can be done on the load. Unfortunately, the load will be DESTROYED in a SHORTENED period of time.
SLIDE 16: ENGINEERING and BIOMECHANICS
CLASS 3 LEVER DESIGN:
(T/F) Because the effort is located in between the load and the fulcrum, the design is OPTIMIZED for approximately 80 years before eventual destruction or loss occurs.
– A ______________ (minimal or moderate) amount of both work and forces will be exerted on the load.
(T/F) Class 3 lever design is commonly seen in human.
CLASS 3 LEVER DESIGN:
TRUE: Because the effort is located in between the load and the fulcrum, the design is OPTIMIZED for approximately 80 years before eventual destruction or loss occurs.
– A MODERATE amount of both work and forces will be exerted on the load.
TRUE: Class 3 lever design is commonly seen in human.
SLIDE 17: CUSP-FOSSA/MARGINAL RIDGE LOCATIONS FOR CENTRIC HOLDING CUSPS ON MANDIBULAR POSTERIOR TEETH.
FACIAL CUSP of the mandibular first premolar = ________ _________ RIDGE or _______ FOSSA of the MAXILLARY FIRST PREMOLARS.
FACIAL CUSP of the mandibular first premolar = MESIAL MARGINAL RIDGE or MESIAL FOSSA of the maxillary first premolar.
SLIDE 17: CUSP-FOSSA/MARGINAL RIDGE LOCATIONS FOR CENTRIC HOLDING CUSPS ON MANDIBULAR POSTERIOR TEETH.
FACIAL CUSP of the mandibular second premolar = ________ _________ RIDGE or _______ FOSSA of the MAXILLARY second premolars
FACIAL CUSP of the mandibular second premolar = MESIAL MARGINAL RIDGE or MESIAL FOSSA of the maxillary second premolar.
SLIDE 17: CUSP-FOSSA/MARGINAL RIDGE LOCATIONS FOR CENTRIC HOLDING CUSPS ON MANDIBULAR POSTERIOR TEETH.
MESIOFACIAL CUSP of the mandibular first molar = ________ _________ RIDGE or _______ FOSSA of the MAXILLARY first molar
MESIOFACIAL CUSP of the mandibular first molar = MESIAL MARGINAL RIDGE or MESIAL FOSSA of the maxillary first molar.
