A Curette is used to clean diseased tissue they are also used for the purpose of biopsy. Many Curettes are spoon shaped and sharpened on the edges to help in the tissue removal process. The Bruns Curette is often used for scraping bone. The tips on the Bruns Curette can be straight or angled. The cup of the Bruns Curette comes in sizes 0000 to 6.