title: A high-copper amalgam evaluated after three years in city and country practices.
abstract: The objective of the study was to compare the condition of Sybraloy restorations placed by the same operator in two different practice locations. Evaluations of the restorations were based on assessments for marginal fracture and staining, and for surface discoloration and roughness. Sybraloy restorations placed in a city practice were more satisfactory than those placed in a country practice. Surface discoloration proved to be unsatisfactory, especially in the country practice, but could be removed with light polishing.
mesh_terms: D003343:Corrosion; D003722:Dental Alloys; D003723:Dental Amalgam; D003793:Dental Restoration, Permanent; D005069:Evaluation Studies as Topic; D006801:Humans; D009910:Oral Hygiene; D012424:Rural Population; D013383:Suburban Population; D013499:Surface Properties
chemical_list: D003722:Dental Alloys; C031360:Sybraloy; D003723:Dental Amalgam