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Orthodontic appliances come in several varieties, each suited to different clinical situations and patient preferences. Metal braces use stainless steel brackets and archwires for maximum control. Ceramic braces offer a tooth-colored alternative for better aesthetics. Lingual braces are placed behind the teeth for invisible treatment. Clear aligners use removable transparent trays. Self-ligating braces reduce friction and appointment frequency. Functional appliances guide jaw growth in children. Each type has specific indications, treatment timelines, and cost considerations.