Stainless steel crowns are semi-permanent restorations used for primary and young permanent teeth. They were introduced in 1950 as chrome-steel crowns. The objectives are to provide a biologically compatible and masticatorily functional restoration that maintains the tooth's form, function, and vitality when possible. There are three types - untrimmed, pretrimmed, and precontoured. Placement involves tooth preparation with reduction, selection of appropriately sized crowns, trial fitting, contouring and crimping, and final cementation.