To evaluate dentoalveolar changes of clear aligners versus fixed orthodontic appliances on skeletal class I non-extraction patients with dental crowding.
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Alveolar bone thickness
Timeframe: From date of randomization until the date of first documented acceptable teeth alignment, assessed up to 12 months.
Alveolar bone height
Timeframe: From date of randomization until the date of first documented acceptable teeth alignment, assessed up to 12 months.