In prosthetics, various options are available to the orthodontist for repairing dental arches. The basic choice is between full crowns and partial crowns. Full crowns are primarily indicated for aesthetic reasons, in order to correct tooth axes and in cases of recurrent caries. Partial crowns in precious alloys are indicated when the need is not essentially aesthetic. They continue today to offer advantages in restoring posterior teeth. Because of their supragingival limits, they alleviate periodontal problems and preserve tooth structure.