Podcast
Questions and Answers
Which method of registering Centric Relation is noted for its accuracy when using a jig?
Which method of registering Centric Relation is noted for its accuracy when using a jig?
- Intra-oral tracing
- Lucia jig/Leaf gauge
- Bimanual Manipulation (correct)
- Chin-point guidance
What is the primary requirement for a stable occlusion when the condyles are in Centric Relation?
What is the primary requirement for a stable occlusion when the condyles are in Centric Relation?
- Equal distribution of forces across all teeth
- Unified disclusion of all anterior teeth
- Stable stops on all teeth with point contacts (correct)
- Maximal intercuspation of all anterior teeth
Which definition best describes Maximal Intercuspation?
Which definition best describes Maximal Intercuspation?
- The position of the mandible in full protrusion
- The best fit of the teeth with dynamic condylar movement
- The complete intercuspation of opposing teeth independent of condylar position (correct)
- The state of dental occlusion under extreme lateral force
What is the importance of Disclusion in occlusion requirements?
What is the importance of Disclusion in occlusion requirements?
Which aspect of Anterior Guidance is critical for ensuring harmony in occlusion?
Which aspect of Anterior Guidance is critical for ensuring harmony in occlusion?
Which method involves tracing movements outside the mouth to register CR?
Which method involves tracing movements outside the mouth to register CR?
What is the recommended buffer space needed for disclusion of posterior teeth?
What is the recommended buffer space needed for disclusion of posterior teeth?
Which characteristic is true about the relationship between Centric Occlusion and Maximal Intercuspation?
Which characteristic is true about the relationship between Centric Occlusion and Maximal Intercuspation?
What is the primary movement of the mandible during maximum opening?
What is the primary movement of the mandible during maximum opening?
What is the function of the lateral pterygoid muscles during the opening of the mandible?
What is the function of the lateral pterygoid muscles during the opening of the mandible?
Which position is characterized by the condyles articulating with the thinnest avascular portion of their respective disks?
Which position is characterized by the condyles articulating with the thinnest avascular portion of their respective disks?
Why is centric relation considered a reliable treatment position?
Why is centric relation considered a reliable treatment position?
What is the maximum allowed distance for the movement of the mandible before it combines with rotational and translational movements?
What is the maximum allowed distance for the movement of the mandible before it combines with rotational and translational movements?
What is the Bennet Angle associated with?
What is the Bennet Angle associated with?
Which of the following is NOT a habitual position of the jaw?
Which of the following is NOT a habitual position of the jaw?
What role does a deprogramming device play in registering centric relation?
What role does a deprogramming device play in registering centric relation?
What is the key difference between arcon and non-arcon articulators?
What is the key difference between arcon and non-arcon articulators?
Which statement best describes the purpose of registering the terminal hinge position?
Which statement best describes the purpose of registering the terminal hinge position?
Which of the following best describes the concept of arbitrary hinge axis?
Which of the following best describes the concept of arbitrary hinge axis?
What does a face-bow instrument primarily accomplish?
What does a face-bow instrument primarily accomplish?
Which of the following factors is NOT a reason to register the terminal hinge position?
Which of the following factors is NOT a reason to register the terminal hinge position?
What is the significance of the transverse horizontal axis in articulators?
What is the significance of the transverse horizontal axis in articulators?
What is one of the challenges faced when trying to register a kinematic hinge axis?
What is one of the challenges faced when trying to register a kinematic hinge axis?
Which of the following statements about the angulation of the mechanical fossa is true?
Which of the following statements about the angulation of the mechanical fossa is true?
Flashcards
Recording Medium for Muscle Forces
Recording Medium for Muscle Forces
A material that allows muscle forces to be recorded without interfering with the process.
Centric Relation (CR)
Centric Relation (CR)
The maxillomandibular relationship where condyles articulate with the disks, independent of tooth contact.
Bimanual Manipulation (Dawson)
Bimanual Manipulation (Dawson)
A method for registering Centric Relation (CR) using two hands, often with a jig for accuracy.
Maximal Intercuspation
Maximal Intercuspation
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Centric Occlusion
Centric Occlusion
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Stable Occlusion
Stable Occlusion
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Anterior Guidance
Anterior Guidance
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Posterior Disclusion
Posterior Disclusion
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Lateral Excursion Disclusion
Lateral Excursion Disclusion
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Face-Bow Transfer
Face-Bow Transfer
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Habitual Positions
Habitual Positions
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Mechanical Considerations
Mechanical Considerations
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Transverse Horizontal Axis
Transverse Horizontal Axis
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Study Notes
Recording Medium and Registration Methods
- Recording medium must allow forces from muscles without resistance.
- Methods for registering Centric Relation (CR) include:
- Bimanual Manipulation (Dawson): Most accurate with jig.
- Chin-point guidance (McCollum).
- Lucia jig/Leaf gauge (Lucia).
- Deglutition (Shanahan).
- Extra-oral tracing (Gysi).
- Intra-oral tracing (Sears).
Maximal Intercuspation
- Maximal intercuspation is defined as complete intercuspation of opposing teeth independent of condylar position.
- Known as the ideal occlusal relationship in the absence of pathologies.
- Centric Occlusion occurs when teeth contact in Centric Relation, which may not align with maximal intercuspation in 10% of individuals.
Requirements for Stable Occlusion
- Stable stops on all teeth when condyles are in Centric Relation (CR).
- Anterior Guidance aligns with the Envelope of Function; slanted slopes of upper lingual surfaces guide lower teeth.
- Posterior teeth should disclude during protrusive movements, ideally managed by the six front teeth.
- Lateral excursions should disclude posterior teeth on the non-working side, recommending a 1 mm buffer space.
- Suprahyoid and lateral pterygoid muscles facilitate movement with maximum opening reaching 45mm.
- Lateral pterygoid muscles pull the condyle medially and downward during movement, at a specific angle known as the Bennet Angle.
Habitual Positions
- Rest Position
- Centric Relation (CR)
- Intercuspation Position (ICP)
Centric Relation (CR)
- CR is a maxillomandibular relationship where condyles articulate with the disks independent of tooth contact.
- CR serves as a treatment position due to its repeatability, independence from tooth contact, load-bearing stability, and ability to relieve muscular interferences.
- Mechanical fossa adjustments aid in capturing this relationship.
Mechanical Considerations
- Mechanical fossa on the upper and condylar spheres on the lower embody fixed angulation relative to the occlusal plane in arcon instruments.
- Non-arcon versions have variable angulations that change upon opening.
Transverse Horizontal Axis
- Registering the terminal hinge position is critical as border movements begin at this point.
- Aids in programming articulators for accurate mandibular movement reproduction.
- Holistic movements are acknowledged as valid substitutes for exact duplication, supporting the use of arbitrary hinge axis principles.
Face-Bow Functionality
- Face-bow transfers the maxillary arch's relationship to the articulator, aligning casts to the opening axis.
- Establishes horizontal and esthetic references using facial landmarks for maxillary cast positioning.
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Description
This quiz covers various methods for registering centric relation and defining maximal intercuspal position in dentistry. Explore techniques like bimanual manipulation, chin-point guidance, and others to test your knowledge in this critical area of dental practice. Perfect for students and professionals looking to solidify their understanding of occlusal techniques.
