The strength of multiple major connector designs under simulated functional loading.

Statement Of Problem: The design of a removable dental prosthesis (RDP) must balance functional strength, comfort to the patient, and the health of the tissue. While research has been conducted to enhance the strength of major connectors, little has been done to determine if the dimensions of major connectors can be reduced in order to enhance patient comfort and tissue health.

Purpose: The purpose of this study was to determine the minimum major connector dimensions of 1 mandibular and 2 maxillary major connectors that would provide adequate functional strength.

The effect of preparation taper on the retention of cemented cast crowns under lateral fatigue loading.

Statement Of Problem: Clinicians have used resistance form as a basis for determining guidelines for preparation design to ensure clinical success of cemented cast restorations. Disagreement on whether clinical success follows the on-off or linear nature of resistance form continues.

Purpose: The purpose of this study was to evaluate the number of cycles required to dislodge a cemented complete crown casting under a cyclic lateral load as a function of taper and to compare this relationship for the resistive and nonresistive ranges of taper.

A clinical investigation of the fit of removable partial dental prosthesis clasp assemblies.

Statement Of Problem: Removable partial denture frameworks are complex castings fabricated from high-shrinkage alloys. This may result in difficulty in achieving accurate fit.

Purpose: The purpose of this study was to evaluate which component(s) of the clasp assembly contact the abutment tooth clinically.

Evaluation of margin angles of collarless metal ceramic restorations.

This study was designed to measure the porcelain margin angles of completed collarless metal ceramic restorations and determine if these angles correspond to the most frequently recommended porcelain margin angle of 90 degrees. A sample of 99 metal ceramic restorations with porcelain labial margins were evaluated. A 1.

A technique for achieving prerestorative minor tooth movement with orthodontic separators.

This article describes 2 patient treatments in which a simple technique was used to realign teeth before restorative procedures. Elastic separators were used to tip the desired tooth into its original position. This restored a normal crown contour and improved the tooth's long-axis alignment.

The dimensions of mandibular lingual tissues relative to the placement of a lingual bar major connector.

Purpose: The purpose of this investigation was to measure and describe the lingual tissues of the anterior mandible to determine the acceptable boundaries of the zone of nonmovable tissue for placement of a lingual bar and to compare these to existing numerical guidelines.

Materials And Methods: Eighty subjects, grouped by age and gender, with clinically normal mandibular lingual gingival tissues from second premolar to second premolar were examined. The lingual sulcular depths (AB) and the distance from the gingival crest to movable tissue of the floor of the mouth (AC) were recorded.