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At least 469 records · Page 26Linked to original sources
PubMed1997

Modifications of the impression to prevent cast breakage.

Broken teeth on a diagnostic or master cast, which usually occurs during separation from the impression, is a common problem experienced by dentists. This article aids in diagnosing and modifying noncritical areas of the impression to prevent this problem. One advantage of this method is that casts of periodontally involved teeth can be prevented from breaking. Disadvantages include time involved in modification and loss of noncritical areas of the tooth.

Calcium Sulfate↗
PubMed1997

Check bite impressions using irreversible alginate/reversible hydrocolloid combination.

A restoration that the patient reports as "high" is a common problem for the restorative dentist. Check bite, dual bite, or closed mouth impressions address this problem effectively by eliminating the opposing arch impression and articulating the opposing cast accurately. In this article a procedure that combines irreversible hydrocolloid and reversible hydrocolloid results in a rapid, clean, and effective solution.

Alginates↗
PubMed1998

Selective-pressure single impression procedure for tooth-mucosa-supported removable partial dentures.

This article describes a method of making impressions for tooth-mucosa-supported removable partial dentures using a single impression procedure. Through the use of border-molded custom trays, selectively relieved, and application of pressure on residual ridge areas, the objectives of maximum tissue coverage and selective tissue placement of primary stress-bearing areas are fulfilled. With a single impression procedure, treatment time is reduced and laboratory errors commonly encountered with the altered cast impression technique can be minimized or eliminated.

Dental Impression Materials↗
PubMed1999

1998 Judson C. Hickey Scientific Writing Award. Use of a flexible cast for the indirect fabrication of provisional restorations.

Efficient fabrication of a clinically acceptable provisional restoration for a fixed partial denture is an important part of treatment success. Fabrication of provisional restorations that uses the indirect technique produces accurate fitting provisional restorations without the chemical and thermal irritation associated with direct fabrication. With a typodont model, an indirect method is presented that uses an elastic cast for fabrication of multiple unit provisional restorations for fixed partial dentures. The cast is available within 6 minutes of impression making, can be trimmed with a sharp scalpel, and provides flexibility that allows easy separation of the acrylic provisional from the cast. The cast can also be used to evaluate the clinical acceptability of the preparations before impression making. This method has also been successfully used for the fabrication of acrylic provisional restorations for onlay preparations.

Acrylic Resins↗
PubMed1999

Fabricating a stable record base for completely edentulous patients treated with osseointegrated implants using healing abutments.

A stable record base is essential for accurate interocclusal centric relation records in a completely edentulous patient. In implant prosthodontics, several procedures have been suggested for the fabrication of a stable record base. However, these procedures necessitate removal of the healing abutments during the interocclusal record procedure and the trial denture placement, which makes the procedures tedious and time-consuming. When the implant-prosthesis interface is subgingival, the patient may also experience discomfort during these procedures. This article describes a procedure for fabricating a stable record base that uses the healing abutments, which eliminates the necessity of the healing abutment removal and its consequences. Advantages and disadvantages of this procedure are also discussed.

Acrylic Resins↗
PubMed1999

Comparison of the accuracy of working casts made by the direct and transfer coping procedures.

STATEMENT OF PROBLEM: A working cast with dies that accurately record the prepared abutments, surrounding soft tissues, and adjacent and opposing teeth is necessary. PURPOSE: This study compared the accuracy of the direct and transfer coping methods in recording the vertical and horizontal dimensional relationship of a pair of removable dies in a working cast before and after separation from the stone base. Among the procedures used for making impressions of abutments for fixed partial dentures, the transfer coping procedure has specific advantages. In particular, where there are multiple abutments, this procedure, in which individual impressions are made of the abutments, transfer copings are made, and a transfer impression of the copings is used for seating the dies and fabrication of a dental stone base, is useful. METHODS: Two groups of working casts were fabricated from a stone master cast containing 2 ivorine teeth to simulate abutments. The first group of working casts was fabricated directly from the elastomeric impression of the abutments using a 2-pour procedure. The second group of working casts was made using the transfer coping procedure. RESULTS: When the interdie dimensions in each group were compared with that of the master cast, after separation and replacement of the dies in the stone base, the differences were less than 100 microm and similar for both the direct and transfer coping techniques. CONCLUSIONS: These findings show that either procedure is equally effective in positioning the dies in the working casts.

Analysis of Variance↗
PubMed1997

A conservative prosthodontic option for the treatment of edentulous patients with atrophic (flat) mandibular ridges.

The purpose of this article is to highlight the clinical problems encountered in the treatment of edentulous patients with atrophic (flat) mandibular ridges. With provision of complete dentures in general dental practice in mind, an impression technique is described and illustrated. The specific objective of the technique discussed is that patients, for whom implant treatment is not a realistic' option, may have improved denture function of their lower complete dentures.

Atrophy↗