Cast Mounting Procedure Quiz and Flashcards

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Questions and Answers

What is the primary concern when centralizing the maxillary and mandibular casts?

Securing the record base properly to the cast.

Preventing interference of the casts posteriorly.

Checking the incisal pin to ensure it does not touch the incisal table.

Ensuring the midline of the maxillary cast is coincided with the midline of the mandibular cast and articulator. (correct)

What could be a possible error during mounting if the incisal pin does not touch the incisal table?

Dimensional changes in the plaster material.

The incisal pin is not properly screwed. (correct)

Movement of the casts during mounting.

Interference of the casts posteriorly.

What can cause a wrong transference of the midline of the articulator with that of the casts (shifting of the midline)?

Movement of the casts during mounting. (correct)

Wrong transference of the midline of the articulator with that of the casts.

Maxillary & mandibular rims not properly fixed after making centric record.

Interference of the casts posteriorly.

How should the incisal guide table be set for the articulator?

0° antero-posteriorly and laterally Signup and view all the answers

What should the condylar track be set at for the articulator?

30° bilaterally Signup and view all the answers

What should the Bennett angle be set at for the articulator?

30° Signup and view all the answers

How should the lateral condylar guidance be set for the articulator?

15° Signup and view all the answers

What is the procedure of attaching the maxillary and mandibular casts to the articulator in their recorded jaw relation called?

Mounting Signup and view all the answers

Before mounting on a Semi-Adjustable articulator (Class III articulator), what should be ensured about the movable surfaces of the articulator?

They move freely without hindrance Signup and view all the answers

In which type of mounting is the face bow used?

Mounting using face bow Signup and view all the answers

What is the main purpose of zeroing or resetting the articulator before mounting?

To ensure the incisal pin is flushed with the top of upper member of articulator Signup and view all the answers

Why is it important to align the midline of the maxillary occlusion rim to the center of the cross midline on the mounting table?

To ensure centralization of the cast to the mounting table Signup and view all the answers

What should be done after pouring plaster over the base of the cast and closing the upper member until the incisal pin touches the incisal table?

Cleaning any debris from the articulator and mounting table Signup and view all the answers

What is the purpose of trimming at the base of the cast if there is not enough space?

To make space for the mounting plaster Signup and view all the answers

Why is it necessary to ensure there is no posterior interference between the maxillary and mandibular casts?

To prevent inaccuracies in the mounted casts Signup and view all the answers

Why should careful attention be paid to aligning the midline of the maxillary occlusal rim to the center of the cross midline on the mounting table?

To facilitate alignment of the incisal pin with the incisal table Signup and view all the answers

What should be done before mounting the mandibular cast?

Soaking the mandibular cast in slurry water Signup and view all the answers

Study Notes

Centralizing Maxillary and Mandibular Casts

The primary concern when centralizing the maxillary and mandibular casts is to ensure accurate mounting and articulation.

Incisal Pin and Mounting

If the incisal pin does not touch the incisal table, it can cause a possible error during mounting, leading to incorrect articulation.

Midline Transference

A wrong transference of the midline of the articulator with that of the casts can occur due to shifting of the midline.

Setting the Articulator

The incisal guide table should be set for the articulator by adjusting the incisal pin to touch the incisal table.
The condylar track should be set at 30-40 degrees for the articulator.
The Bennett angle should be set at 15-20 degrees for the articulator.
The lateral condylar guidance should be set by adjusting the condylar elements to match the patient's lateral movement.

Attaching Casts to the Articulator

The procedure of attaching the maxillary and mandibular casts to the articulator in their recorded jaw relation is called mounting.

Pre-Mounting Preparation

Before mounting on a Semi-Adjustable articulator (Class III articulator), the movable surfaces of the articulator should be ensured to be free of debris and lubricated.

Face Bow Usage

The face bow is used in a type of mounting called face bow transfer.

Zeroing the Articulator

The main purpose of zeroing or resetting the articulator before mounting is to eliminate any existing condylar settings and ensure accurate articulation.

Aligning the Midline

It is important to align the midline of the maxillary occlusion rim to the center of the cross midline on the mounting table to ensure accurate transfer of the maxillary cast to the articulator.

Post-Pouring Procedure

After pouring plaster over the base of the cast and closing the upper member until the incisal pin touches the incisal table, the excess plaster should be removed and the cast should be allowed to set.

Trimming the Base

Trimming at the base of the cast is necessary if there is not enough space to ensure proper mounting and articulation.

Posterior Interference

It is necessary to ensure there is no posterior interference between the maxillary and mandibular casts to prevent inaccurate articulation.

Midline Alignment

Careful attention should be paid to aligning the midline of the maxillary occlusal rim to the center of the cross midline on the mounting table to ensure accurate transfer of the maxillary cast to the articulator.

Pre-Mounting Mandibular Cast

Before mounting the mandibular cast, the maxillary cast should be properly mounted and the articulator should be zeroed to ensure accurate articulation.

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Description

Test your knowledge about the procedure for mounting dental casts, including trimming the base, aligning the midline, and pouring plaster over the base. This quiz covers the essential steps for accurate dental cast mounting.

Dental Cast Mounting Procedure