70 Questions
What is the maxillomandibular relationship where the condyles articulate with the thinnest avascular portion of their respective articular disks?
Centric relation
Which muscle is responsible for the lateral movement of the mandible in the horizontal plane?
Lateral pterygoid muscle
In what orthodontic relationship do the anterior teeth overlap both horizontally and vertically by 2mm?
Angle class I
Which ligament attaches the body of the mandible to the base of the skull?
Sphenomandibular ligaments
What type of movement in space can be divided into translation and rotation components?
Mandibular movement
Which muscle is part of the suprahyoid muscles responsible for mandibular movements?
Geniohyoid muscle
What is the purpose of the retrodiscal pad in the temporomandibular joint?
To provide a highly vascularized and innervated connective tissue
What role do the temporomandibular ligaments play in joint movement?
Limit joint movement
What is the primary function of the articular disk in the temporomandibular joint?
To separate the mandibular fossa and the articular tubercle of the temporal bone from the condylar process of the mandible
What is the name for the maxillomandibular relationship where condyles articulate with the thinnest avascular portion of their respective articular disks?
Centric relation
What is another term for laterotrusion or mandibular side shift?
Bennett movement
Which component is responsible for purely rotational movement in the sagittal plane?
Rotation
What is the main focus of the chapter?
Maxillary and mandibular teeth contact
What is the purpose of ensuring uniform dental contact on closing?
All of the above
Which structures are affected by malocclusion?
All of the above
What is one of the learning goals related to mandibular movements?
To explain mandibular movements in three planes for analysis
What is emphasized in the review of anatomic structures important to the study of occlusion?
Ideal versus pathologic occlusion
Why is it important for restorative procedures to ensure functional occlusal contact relationships are restored?
All of the above
Which department does Muhammad Saleh belong to at Near East University?
Dentistry- Department of Prosthodontic dentistry
$5(7+3)$
40
Which movement is crucial for proper dental care?
Mandibular movements
What role do ideal versus pathologic occlusion play in restorative procedures?
They guide restorative procedures to restore functional occlusal contact relationships
What are the components of TMJ?
Articular disc, articular eminence, condyle, capsule, ligaments, and muscles
Explain mandibular movements in three planes for analysis.
The mandibular movements in three planes for analysis include sagittal (protrusion/retrusion), frontal (laterotrusion), and horizontal (depression/elevation).
Mention the terminal landmarks on Posselt’s chart.
Condyles, incisal edges/mandibular incisor teeth, and midpoint of the lower border of the mandible
What do most restorative procedures affect in terms of occlusal surfaces?
The shape of the occlusal surfaces
What is the primary function of the articular disc in the temporomandibular joint?
To facilitate smooth movement and to distribute load within the joint
What is the main focus of the chapter?
Anatomic structures important to the study of occlusion and mandibular movement
Why is it important for restorative procedures to ensure functional occlusal contact relationships are restored?
To allow for optimal function, minimize trauma, and allow for uniform load distribution throughout the dentition
What is one of the learning goals related to mandibular movements?
To explain mandibular movements in three planes for analysis
What is another term for laterotrusion or mandibular side shift?
Frontal movement
What is the maxillomandibular relationship where condyles articulate with the thinnest avascular portion of their respective articular disks called?
Centric relation
What is emphasized in the review of anatomic structures important to the study of occlusion?
The concept of ideal versus pathologic occlusion
What ligament attaches the body of the mandible to the base of the skull?
Sphenomandibular ligament
What are the two spaces superior and inferior to the articular disk in the temporomandibular joint?
superior and inferior synovial cavities
What is the definition of centric relation?
maxillomandibular relationship in which the condyles articulate with the thinnest avascular portion of their respective articular disks
What are the components of mandibular movement that can be described in terms of rotation and translation?
Translation and rotation
What is the name for the maxillomandibular relationship in which the condyles articulate with the thinnest avascular portion of their respective articular disks?
Centric relation
What is the primary function of the retrodiscal pad in the temporomandibular joint?
Highly vascularized and innervated connective tissue
What is the main focus of the components that are responsible for purely rotational movement in the sagittal plane?
Terminal hinge axis
What is another term for the lateral movement of the mandible in the frontal plane?
Transtrusion
What is the purpose of ensuring uniform dental contact on closing?
Act as stops for vertical closure without excessively loading any one tooth
What is one of the learning goals related to the study of mandibular movements?
Understanding the complex three-dimensional mandibular movement
In what orthodontic relationship do the anterior teeth overlap both horizontally and vertically by 2mm?
Angle class I
What is the role of the temporomandibular ligaments in joint movement?
Attach the body of the mandible to the base of the skull
Which muscle is responsible for the lateral movement of the mandible in the horizontal plane?
Lateral pterygoid muscle
Student will be able to mention the components of ______.
TMJ
Student will be able to explain mandibular movements in three plane for ______.
analysis
Most restorative procedures affect the shape of the ______ surfaces.
occlusal
Maxillary and mandibular teeth should contact uniformly on closing to allow optimal ______.
function
The malocclusion may be associated with undesirable changes to the ______.
teeth
The malocclusion may be associated with undesirable changes to the ______.
musculature
The malocclusion may be associated with undesirable changes to the temporomandibular ______.
joints
The malocclusion may be associated with undesirable changes to the ______.
periodontium
This chapter reviews the anatomic structures important to the study of ______.
occlusion
The concept of ideal versus pathologic ______ is introduced.
occlusion
The concept of ideal versus pathologic occlusion is introduced, as is the history of ______ theory.
occlusal
The concept of ideal versus ______ occlusion is introduced, as is the history of occlusal theory.
pathologic
The articular disk consists of avascular dense connective tissue. it is attached (posteriorly) to loose highly vascularized and innervated connective tissue: the retrodiscal ______.
pad
The body of the mandible is attached to the base of the skull by muscles and three paired ______: temporomandibular ligaments, Sphenomandibular ligaments, and stylomandibular ligaments.
ligaments
Several muscles are responsible for mandibular movements, including muscles of mastication and ______ muscles.
suprahyoid
The maxillary and mandibular teeth contact simultaneously when the condylar processes are fully seated in the mandibular fossae, and the teeth do not interfere with harmonious movement of the mandible during function. Ideally, in the fully bilateral seated position of the condyle–articular disk assemblies, the maxillary and mandibular teeth exhibit maximum ______.
intercuspation
If the mesiobuccal cusp of the maxillary first molar is aligned with the buccal groove of the mandibular first molar, the orthodontic relationship is considered Angle class ______.
I
Centric relation is defined as the maxillomandibular relationship in which the condyles articulate with the thinnest avascular portion of their respective articular disks with the complex in the anterosuperior position against the shapes of the articular ______.
eminences
In the sagittal plane, the mandible is capable of a purely rotational movement, as well as ______.
translation
In the horizontal plane, the mandible is capable of rotation around several vertical axes. lateral movement consists of rotation around an axis situated in the working (laterotrusive) condylar process with relatively little concurrent ______.
translation
In a lateral movement in the frontal plane, the nonworking (mediotrusive) condyle moves down and medially, whereas the working (laterotrusive) condyle rotates around the sagittal axis perpendicular to this plane. This movement may be lateral and upward (laterosurtrusion) or lateral and downward (laterodetrusion). A straight horizontal tracing represents the ______ movement of the incisal edge of the mandibular incisors.
protrusive
The anterior determinants (articulation of the teeth) and the posterior determinants (temporomandibular controls and their associated structures) are the main focus of the components that are responsible for purely ______ movement in the sagittal plane.
rotational
The anterior determinants are the vertical and horizontal overlaps of the anterior teeth and the form of the lingual concavities of the maxillary anterior teeth. These can sometimes be altered by restorative and ______ treatment.
orthodontic
The posterior determinants cannot be altered by the dentist. The anterior determinants are the vertical and horizontal overlaps of the anterior teeth and the form of the lingual concavities of the maxillary anterior teeth. These can sometimes be altered by restorative and ______ treatment.
orthodontic
Study Notes
Temporomandibular Joint (TMJ) and Mandibular Movements
- The maxillomandibular relationship where the condyles articulate with the thinnest avascular portion of their respective articular disks is called centric relation.
- Lateral movement of the mandible in the horizontal plane is controlled by the medial pterygoid muscle.
- In an ideal orthodontic relationship, the anterior teeth overlap both horizontally and vertically by 2mm.
- The stylomandibular ligament attaches the body of the mandible to the base of the skull.
- The temporomandibular ligaments play a role in limiting excessive movements of the mandible.
- The primary function of the articular disk in the TMJ is to reduce friction and distribute stress.
- The retrodiscal pad in the TMJ serves to cushion and reduce stress.
- Movement in space can be divided into translation and rotation components.
Mandibular Movements
- Mandibular movements can be described in three planes: sagittal, frontal, and horizontal.
- The components of mandibular movement can be described in terms of rotation and translation.
- In the sagittal plane, the mandible is capable of a purely rotational movement, as well as translation.
- In the horizontal plane, the mandible is capable of rotation around several vertical axes.
- Lateral movement consists of rotation around an axis situated in the working (laterotrusive) condylar process with relatively little concurrent translation.
Occlusion and Restorative Procedures
- Ensuring uniform dental contact on closing is important to allow optimal function.
- Malocclusion may be associated with undesirable changes to the teeth, periodontium, and TMJ.
- The concept of ideal versus pathologic occlusion is introduced in the study of occlusion.
- Restorative procedures affect the shape of the occlusal surfaces.
Anatomic Structures
- The articular disk consists of avascular dense connective tissue.
- The body of the mandible is attached to the base of the skull by muscles and three paired ligaments: temporomandibular ligaments, Sphenomandibular ligaments, and stylomandibular ligaments.
- Several muscles are responsible for mandibular movements, including muscles of mastication and suprahyoid muscles.
Test your knowledge on occlusal terminology, mandibular movements, TMJ components, and Posselt’s chart in fixed prosthodontics. This quiz is based on the learning goals of mentioning TMJ components, explaining mandibular movements, and identifying terminal landmarks on Posselt’s chart.
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