Progress in Orthodontics

Table 5 Visibility of each organ in subjects wearing orthodontic appliances

From: Influence of orthodontic appliance-derived artifacts on 3-T MRI movies

	Fixed retainer	Brackets
Velopharynx	○	△
Hard palate	△	×
Anterior part of tongue	×	×
Posterior part of tongue	○	×
Vocal fold	○	○

Symbols: ○, clearly visible; △, occasionally visible; ×, completely invisible

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