What is the special tray?

What is the special tray?

Special Tray A special tray is defined as, “A custom made device prepared for a particular patient which is used to carry, confine and control an impression material while making an impression”.

What is a special tray used for?

Special tray ( Individual or custom tray tray made from a cast recovered from primary impression. It is used in making a final impression.

What is a custom tray for dentures?

Complete Dentures – Impression Tray Fabrication | Foundation for Oral-facial Rehabilitation.

What are custom trays?

Custom trays are made up of auto-polymerizing Polymethyl-methacrylate (PMMA) resin, thermoplastic material and visible-light curing resin. The tray materials are supposed to be rigid, dimensionally stable, retentive to impression materials or adhesive and moisture resistant.

What are the three types of custom impression trays?

Impression trays are supplied as quadrant trays, which cover half of the arch; section trays, which are suited for the anterior teeth; and full arch trays, which cover the complete arch.

How much clearance should be allowed in the tray?

You won’t leave them! How much clearance around the teeth should the impression tray give? at least 1/8 inch around buccal and lingual of teeth.

What is the function of spacer in complete denture?

Function of spacer is to provide space for final impression material.

What are the two types of custom tray?

Custom Tray

• Perforated trays.
• Non-perforated trays.
• Rim-lock trays (water-cooled and non-water cooled)

What are the types of trays?

• Fast Food Serving Trays. One of the most common types of serving trays that you will see on a regular basis will be fast food serving trays.
• Serving Trays with Compartments.
• Appetizer Serving Trays.
• Tea Serving Trays.
• Plastic Serving Trays.
• Wooden Serving Trays.
• Metal Serving Trays.
• Fiberglass Serving Trays.

What type of trays are used for denture final impressions?

There are two kinds of full and partial denture trays: trays with perforations, for use with alginate impression materials, and solid, nonperforated trays for use with solid impression materials, such as red compound or fast-set impression plaster No.

What are the 3 types of dental impressions?

There are three main types of dental impressions — preliminary, final, and bite registration.

What should the tray handle look like on a denture?

Tray handle should be 15mm wide and extend straight down from the alveolar ridge. Completed Maxillary Tray Check List The completed tray is smooth and of the proper dimension and extension. 16. Finger rests Mandibular Tray Finger rests aid in holding the tray in position when making the wash impression.

Can a mandibular tray be used as a finger rests?

For mandibular tray two posterior handle should be given as finger rests. 23. The next phase is preparing the tray for border molding procedure: 24. References: 1. Zarb. Bolender.: Prosthodontic Treatment of Edentulous patient,edi 12. p225-247 3.

Can a mandibular denture be retained with E ective suction?

What is most important for attaining a mandibular complete denture with e”ective suction is to understand completely the suction mechanism of a mandibular complete denture. And if one can master skills of clinical procedures based on this mechanism, a mandibular complete denture will be retained successfully on the alveolar ridge6,7).

What are the materials used to make special trays?

Materials used to fabricate special tray: 1. Auto polymerizing acrylic resin. 2. Shellac 3. Vacuum or pressure-formed thermoplastic resin sheets. 4. Tray compound 8. FABRICATION A. Preparation of the primary cast : 1.