Evaluation of the Flexural Strength of Interim Restorative Materials in Fixed Prosthodontics.

Statement Of The Problem: Mechanical properties of interim restorations are considered as important factors specially when selecting materials for long-term application or for patients with para-functional habits. Flexural strength is one of the most important components of these restorations.

Purpose: The purpose of this study was to compare the flexural strength of five interim restorative materials.

Marginal and internal fit of metal copings fabricated with rapid prototyping and conventional waxing.

Statement Of Problem: Given the limitations of conventional waxing, computer-aided design and computer-aided manufacturing (CAD-CAM) technologies have been developed as alternative methods of making patterns.

Purpose: The purpose of this in vitro study was to compare the marginal and internal fit of metal copings derived from wax patterns fabricated by rapid prototyping (RP) to those created by the conventional handmade technique.

Material And Methods: Twenty-four standardized brass dies were milled and divided into 2 groups (n=12) according to the wax pattern fabrication method.

Rapid Prototyping Technologies and their Applications in Prosthodontics, a Review of Literature.

The early computer-aided design/computer-aided manufacturing (CAD/CAM) systems were relied exclusively on subtractive methods. In recent years, additive methods by employing rapid prototyping (RP) have progressed rapidly in various fields of dentistry as they have the potential to overcome known drawbacks of subtractive techniques such as fit problems. RP techniques have been exploited to build complex 3D models in medicine since the 1990s.