Mandibular Impression Procedures

The lingual flange turns laterally toward the ramus to fill the retromylohyoid fossa and complete the typical S form of the correctly shaped lingual ______.

For lower impressions, it is essential that the oral tissues are ______ before impressions are made.

Approximately 5 mm of bulk of impression material should cover the entire basal seat area for lower impressions using an edentulous stock ______.

The lingual flanges need to be observed in relation to the lingual slope of the lower residual ridge when selecting a stock ______.

If the stock tray is made from metal, the lingual flanges may need to be reshaped to allow for the action of the ______ muscle.

Areas of underextension in the stock tray, such as over the retromolar pads, should be corrected with soft boxing wax before the ______ is made.

The objectives of an impression are to provide support, retention, and stability for the ______.

An impression also will act as a foundation for improved appearance of the lips and, at the same time, should maintain the health of the ______ tissues.

The impression should record all the potential denture-bearing surfaces available. To a large extent, this surface is readily identified if the biological considerations of impression making are understood correctly. However, the denture’s retention is enhanced considerably if the denture extends peripherally to harness the resiliency of most of the surrounding limiting ______.

An impression that records the depth of the sulcus, but not its width, will result in a denture that lacks adequate ______.

Although impression techniques, methods, and materials vary, they should be selected on the basis of ______ factors.

For a successful impression to be achieved, the following concepts should be adhered to, irrespective of the selected technique: 1. The tissues of the mouth must be ______.

The labial and buccal vestibules can be molded by asking the patient to 'suck down' onto the tray. In addition, the patient should be asked to move the mandible from side to side and then open wide. These movements will record the influence of the ______ processes on the shape of the buccal vestibules.

The tissue surface and borders of the tray, including the rim of wax, are painted with an adhesive material to ensure that the alginate impression material adheres to the tray. The irreversible hydrocolloid is mixed according to the manufacturer’s instruction and is placed in the tray and evenly distributed to fill the tray to the level of its ______.

A small amount of impression material is placed in the anterior part of the palate and in the sulci opposite the tuberosities to help prevent air from being trapped in these parts of the preliminary impression. The loaded tray is then positioned in the mouth in a manner similar to that during the practice ______.

Once the material has set, the cheeks and upper lip are lifted away from the borders of the impression to introduce air between the soft tissue at the reflection and the border of the impression. While the lip is elevated, the tray is removed from the mouth in one motion and inspected to ensure that all the basal seat has been ______.

The labial and buccal vestibules can be molded by asking the patient to 'suck down' onto the tray. In addition, the patient should be asked to move the mandible from side to side and then open wide. These movements will record the influence of the coronoid processes on the shape of the ______ vestibules.

The irreversible hydrocolloid is mixed according to the manufacturer’s instruction and is placed in the tray and evenly distributed to fill the tray to the level of its borders. A small amount of impression material is placed in the anterior part of the palate and in the sulci opposite the tuberosities to help prevent air from being trapped in these parts of the preliminary impression. The loaded tray is then positioned in the mouth in a manner similar to that during the practice ______.