title: Commentary. Shade guide optimization--a novel shade arrangement principle for both ceramic and composite shade guides when identifying composite test objects.
authors.affiliation: Dental Consultants, Inc., Ann Arbor, Michigan, USA.
authors.forename: John M
authors.initials: JM
authors.lastname: Powers
mesh_terms: D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D004867:Equipment Design; D006801:Humans; D017797:Prosthesis Coloring / Q000295:instrumentation*
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D003776:Dental Porcelain