DEN203 Prosthetic Dentistry II Quiz

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Questions and Answers

What is the definition of Centric Relation (CR)?

Contact between cusps, fossa, marginal ridges of opposing teeth.

The position of the jaw when teeth are in intercuspal contact (IC).

The maxillomandibular relationship in which the condyles articulate with the thinnest avascular portion of their respective discs as a complex in the anterior-superior position against the slopes of the articular eminence. (correct)

The integrated action of the jaw muscles, temporomandibular joint and teeth.

What is Maximum Intercuspation (MI)?

Contact of teeth with maximum clenching. (correct)

Dynamic biological relationship of components of the masticatory system that controls tooth contacts during function and dysfunction.

The position of the jaw when teeth are in intercuspal contact (IC).

What is Intercuspal Position (ICP)?

Contact between cusps, fossa, marginal ridges of opposing teeth.

Position of the jaw when teeth are in IC. (correct)

The integrated action of the jaw muscles, temporomandibular joint and teeth.

Dynamic biological relationship of components of the masticatory system that controls tooth contacts during function and dysfunction.

What is Occlusion?

Dynamic biological relationship of components of the masticatory system that controls tooth contacts during function and dysfunction. Signup and view all the answers

What is Intercuspal Contact (IC)?

Contact between cusps, fossa, marginal ridges of opposing teeth. Signup and view all the answers

What is Articulators?

Devices used to simulate jaw movements and hold dental casts in a precise relationship to each other. Signup and view all the answers

Which type of articulator allows adjustment of condylar inclination and Bennett angle?

Semi-Adjustable Arcon Signup and view all the answers

What is the adjustability of lateral movement in a Simple Hinge articulator?

No lateral movement Signup and view all the answers

What is the intercondylar distance in a Semi-Adjustable articulator?

110mm Signup and view all the answers

Which type of articulator is recommended for most dental restorations due to its accuracy?

Semi-Adjustable Signup and view all the answers

What does the Arcon Fossa in the upper member duplicate in a Semi-Adjustable Arcon articulator?

Arrangement of TMJ Signup and view all the answers

What determines the condylar settings in a Fully Adjustable articulator?

Pantographic and stereographic records Signup and view all the answers

What does the Facebow instrument record and transfer to the articulator in dentistry?

Spatial relationship of the maxilla Signup and view all the answers

What can be adjusted by raising the height of an articulator pin in a Semi-Adjustable articulator?

Increase of OVD (occlusal vertical dimension) Signup and view all the answers

What is the position of the jaw during postural jaw position (PJP)?

When an individual is sitting or standing upright and relaxed Signup and view all the answers

What is the function of an articulator in dentistry?

Represent the temporomandibular joints and simulate jaw movements Signup and view all the answers

What is the purpose of the incisal guide table in an articulator?

Maintains the incisal guidance of the articulator Signup and view all the answers

What does overjet measure in terms of tooth relationship?

Horizontal overlap of the incisors Signup and view all the answers

What defines normal overbite in terms of tooth relationship?

Lower incisor edges contact the lingual surface of upper incisors at or above the cingulum Signup and view all the answers

What distinguishes working side from non-working/balancing side during lateral jaw movement?

Working side is where mandible moves to; non-working/balancing side is where condyle moves down and medially. Signup and view all the answers

Study Notes

Centric occlusion (CO) is the tooth contact position when the jaw is in centric relation.
Tooth contact during CO may be more retruded than at the intercuspation point (ICP).
Postural jaw position (PJP) is the position of the jaw when an individual is sitting or standing upright and relaxed.
A free way space or speaking space is present in the mouth.
Occlusal vertical dimension (OVD) is the vertical height of the lower third of the face when teeth contact in ICP.
Lateral jaw positions refer to the side of the jaw that moves during lateral movements.
There are two types of lateral jaw positions: working side (which the mandible moves to) and non-working/balancing side (which the condyle moves down and medially).
Bennett movement is the bodily lateral movement of the mandible resulting from the movements of the condyles along the lateral inclines in the mandibular fossa.
Bennett Angle is the angle formed by the movement of the balancing condyle with the sagittal plane during lateral jaw movement.
Overjet is the horizontal overlap of the incisors and the relationship between upper and lower incisors in the horizontal plane.
Normal overjet is the thickness of the upper edges of the upper incisors in contact with the lower incisors.
Overbite is the vertical overlap of the incisors.
Normal overbite is when the lower incisor edges contact the lingual surface of the upper incisors at or above the cingulum.
Overjet and overbite are measured from the labial surface of the lower incisor to the labial surface of the upper incisor.
Complete overbite is when the lower incisors contact either the upper incisors or the palatal mucosa.
Anterior crossbite refers to a deviation from the normal buccolingual relationship, may be anterior or posterior, or unilateral or bilateral.
Anterior crossbite can be diagnosed using an articulator.
An articulator is a mechanical device used to represent the temporomandibular joints and the jaw members to which maxillary and mandibular casts may be attached to simulate jaw movements.
Uses of an articulator include diagnosing the state of occlusion for both natural and artificial dentition, planning dental procedures based on the relationship between opposing natural or artificial teeth, aiding in the fabrication of restorations, and correcting and modifying completed restorations.
Properly-mounted casts allow the operator to visualize the patient's occlusion, especially from the lingual view.
Using an articulator eliminates the difficulty of refining complete denture occlusion in the mouth.
The upper member of an articulator is a triangular frame with the base of the triangle placed posteriorly and two condylar elements projecting on either side.
The lower member of an articulator is an L-shaped frame with a horizontal arm and a vertical arm.
The horizontal arm of the lower member contains the incisal guide table, which maintains the incisal guidance of the articulator.
The vertical arm of the lower member contains the condylar guidance slot at the upper position.
The incisal guide table is a short cylindrical part of the articulator that maintains the incisal guidance angle.
The incisive rod helps keep a fixed distance between the upper and lower members at the anterior end.
The tip of the incisal guide pin serves as the anterior reference point in the articulator.

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Description

Test your knowledge in Prosthetic Dentistry II with this quiz. Learn about articulators, occlusion, and the dynamic biological relationship of components of the masticatory system.