The goal of making the peripheries of the custom tray under extended to all bordered clearance from the frenum areas.. To give enough space for the used impression materials to allow border molding the tray

The goal of making the peripheries of the custom tray under extended to all bordered clearance from the frenum areas:

• A- To give enough space for the used impression materials to allow border molding the tray.***
• B- To give enough space for the die spacer.
• C- To give enough space for the cementation materials.
• D- None.

The correct answer is (A) To give enough space for the used impression materials to allow border molding the tray.

Extended borders on a custom tray are crucial for several reasons, including:

- Ensuring proper impression material flow:

Extending the borders beyond the frenum areas allows the impression material to flow freely and capture the accurate contours of the frenum area, preventing any distortion or undercuts in the impression.

- Facilitating border molding:

Border molding is a technique used to create a smooth transition between the tray material and the impression material. By extending the borders, there is more material to work with for border molding, ensuring a seamless transition and preventing any sharp edges that could irritate the frenum.

- Providing a stable base for the tray:

Extended borders provide a wider base for the tray, increasing its stability and reducing the risk of movement or displacement during the impression-taking process.

- Protecting the delicate frenum area:

The extended borders act as a protective barrier, preventing the impression material from directly contacting the frenum and causing discomfort or injury.

Options (B), (C), and (D) are incorrect because:

• (B) To give enough space for the die spacer is not the primary purpose of extended borders. Die spacers are used to create space between the tray and the die during the cast process, not during the impression-taking stage.
• (C) To give enough space for the cementation materials is not a primary concern for extended borders. Cementation materials are typically applied to the internal surface of the tray, not the borders.
• (D) None is incorrect because extended borders serve several important functions in custom tray fabrication.

Therefore, the primary goal of extending the peripheries of the custom tray under extended to all bordered clearance from the frenum areas is to provide adequate space for impression material flow and facilitate border molding.