Sterling silver (an alloy of 92 percent silver, blended with copper and other metals) gives a lustrous appearance to coins, jewelry, and silverware. The fact that pure silver is slightly harder than gold, but still very ductile and malleable, makes it a natural choice for dental fillings.
Ultrasound detected papillary projections in 78% of tumors. Papillary projections were disseminated in 33% of malignant, 20% of borderline, and 0% of benign tumors (p = 0.0049). The mean size of the papillary projections was 9.6, 15.7, and 35.3 mm in benign, borderline, and malignant tumors, respectively (p = 0.0007).
Filiform Papillae. The filiform papillae, or conical papillae, are the most numerous of the four main types of papillae, which are arranged in fairly regular rows running parallel to the central groove of the tongue. Some of these papillae have a simple conical form, while others have frilled tips, with each branch of the peak roughly conical.