Twenty years ago, when an adult needed orthodontics, the option was basically one: metal braces. Today there's a second path that has won over millions of adult patients worldwide: removable transparent aligners. The inevitable question is: which is better?

The correct answer, supported by clinical evidence available in 2025, is that there is no universally superior option. There is a more appropriate option for your specific case.

How Does Each System Work?

Clear Aligners

Removable splints made of thermoplastic material, digitally fabricated from a scan of your teeth. Used in progressive series — every 7-14 days you switch to the next aligner — applying controlled forces that gradually move teeth toward the planned position.

Key condition: they must be worn 20 to 22 hours per day. Only removed for eating, drinking colored liquids, and oral hygiene.

Braces (Metal, Ceramic, Lingual)

Fixed devices bonded directly to the teeth, connected by an active metal arch. The orthodontist adjusts forces at each appointment (every 4-8 weeks), controlling three-dimensional tooth movement with high mechanical precision. They don't depend on patient compliance to remain active.

Clinical Effectiveness: Evidence 2024-2025

For simple and moderate cases

Clear aligners are highly effective for mild to moderate crowding, diastemas, and Class I malocclusions. A 2024 PubMed study found aligners achieved average treatment duration of 14.5 months versus 16.2 months with conventional braces for these cases.

For complex cases

Conventional braces remain the most versatile option for severe skeletal malocclusions, significant intrusion/extrusion movements, precise root torque control, and cases requiring orthognathic surgery collaboration.

Patient Experience: Comfort, Hygiene, and Daily Life

Oral hygiene

One of the strongest clinical arguments for aligners in adults: being removable allows normal brushing and flossing. Fixed braces complicate hygiene around appliances, increasing risk of white spot lesions, cavities, and gingivitis during treatment.

Aesthetics during treatment

A 2024 survey showed 78% of aligner users reported high aesthetic satisfaction during treatment, versus 41% of metal brace users.

Scientific References