What is the purpose of tissue stops?

Metallic offsets, known as tissue stops, are routinely placed on the internal surface of the retentive latticework in distal extension-base removable partial dentures (RPDs) to provide adequate space for the denture base resin beneath the metal framework.

What is the function of spacer in complete denture?

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

What is the purpose of placing base plate wax in the fabrication of custom tray?

Conventionally, baseplate wax is used as the spacing medium or blockout material for making custom impression trays. Quite often, the wax melts onto the tray during fabrication and can be tedious to remove. Failure to remove all wax may interfere with the adhesion of impression material to the tray.

What is the purpose of a custom tray?

The custom tray conserves the volume of material required for the impression; thus, cutting the cost incurred, as the material used for each impression is reduced. Also, a streamlined design would be comfortable for the patient while making the impression.

What are the stops for custom tray?

Tissue stop on the computer-designed custom tray: (a) no tissue stop, (b) saddle-shaped tissue stop, (c) marginal-band tissue stop, and (d) inner marginal-band tissue stop.

What is spacer wax?

It increases the thickness of wax rims while making dentures using base plates. Provide uniform thickness of impression material. Use of spacer wax prevents direct contact of acrylic trays with soft tissues.

What is stopper in prosthodontics?

SPACERS WITH TISSUE STOPPERS: Tissue stoppers/ windows are made bilaterally at the canine and the molar region mostly 2mm in width. They help in proper vertical seating of the impression tray, they and control the thickness of the impression material.

What is a wax spacer?

Wax spacer is used to provide space for impression material. It’s thickness varies according to material like 0.5 mm for ZOE, 1.5 mm for impression plaster , 3 mm for silicone impression material.

What is spacer in prosthodontics?

Full spacers cover the entire residual ridge except PPS area in maxilla and buccal shelf and retromylohyoid area in the mandible. This provides space for impression material. Partial spacers, like I-spacer and T-spacer, cover specific tissues based on different clinical situations.

What is the purpose of spacer in custom tray?

Wax spacer is used to provide space for impression material. It’s thickness varies according to material like 0.5 mm for ZOE, 1.5 mm for impression plaster , 3 mm for silicone impression material. Tissue stopper helps in proper placement and stabilization of the tray as it’s in directly contact of the mucosa.

What are the purposes of a tray in dentistry?

Dental impression trays are special devices that dentists use to place the impression material in. They also carry the material inside the mouth with the tray, plus control the whole impression process. These are an essential part of several procedures in dentistry.

What is a custom tray in dentistry?

Custom Trays. Definition An individualized impression tray made from a cast recovered from primary impression. It is used in making a final impression.