ADEX Objective Structured Clinical Examination (OSCE) Practice Exam

The correct answer states that noble porcelain-fused-to-metal (PFM) copings primarily composed of palladium typically contain 50-60% palladium and 30-40% silver. This composition is significant because palladium is a noble metal with excellent biocompatibility, corrosion resistance, and ability to bond well with porcelain, making it ideal for use in dental restorations such as PFM copings.

In the context of dental materials, noble metals are preferred for their aesthetic qualities and physical properties, and the inclusion of silver further enhances these characteristics while also contributing to cost-effectiveness. The specific percentage range mentioned not only indicates a typical composition for strength and durability but also aligns with industry standards for noble metal PFM restorations, illustrating the importance of material properties in dental applications.

Understanding the composition of these materials is crucial, as it impacts the performance, longevity, and aesthetic outcomes of dental restorations.