Invisible aligners vs. traditional braces: a complete comparison for 2026

When choosing between invisible aligners and traditional braces, the question isn’t which are “better”, but which are better for your situation — the type of misalignment, your profession, your budget and your personal discipline. The marketing around invisible aligners often gives the impression that traditional fixed braces are gradually becoming obsolete. The reality is more sober: both systems have a firm place in orthodontics, they simply serve different roles.

In this article you’ll find a comparison, an honest look at the advantages and disadvantages of both methods, and a practical guide to which system to choose for which type of misalignment. Without the marketing spin.

How the two methods work

Traditional fixed braces consist of brackets bonded to the outer surface of the teeth and an orthodontic wire that runs through the brackets and moves the teeth into the desired position. The patient wears them 24 hours a day, with check-ups every 4 to 6 weeks. Tooth movements can be controlled very precisely here, including rotations and vertical corrections.

Invisible aligners consist of a series of clear plastic trays — moulded shells that fit closely around the dental arch. The patient receives a set of aligners and changes them gradually according to the treatment plan — each aligner moves the teeth a little closer to the target position. How often the aligners are changed and how many there will be in total is determined by the orthodontist based on a 3D plan designed before treatment begins. The patient removes them only for eating and cleaning their teeth — they should be worn at least 22 hours a day.

A third option is lingual braces, with brackets on the inner surface of the teeth. They are more expensive, but invisible even for more complex cases where aligners reach their limits. In practice, only a minority of patients choose them today.

The key parameters compared

The two systems differ across several practical dimensions. Treatment with traditional fixed braces typically takes 12 to 24 months, while invisible aligners usually work faster at 6 to 18 months, though only for milder misalignments. When it comes to visibility, fixed braces are noticeable (ceramic versions less so), whereas aligners are almost invisible. Comfort differs too: fixed braces can cause sore spots in the first few weeks, while aligners have no wires and can be taken out. That removability also makes cleaning your teeth easy with aligners, but more complicated with fixed braces.

For complex cases, traditional braces have the edge — they handle even extractions and large rotations, while aligners face limits with certain movements. The trade-off is discipline: fixed braces work independently of the patient, whereas aligners require genuine commitment, at least 22 hours of wear a day. Finally, fixed braces need check-ups every 4 to 6 weeks, while aligners require them slightly less often, every 6 to 10 weeks.

Advantages and disadvantages of both systems

Neither system is better at everything — each excels at some things and falls short at others. The point isn’t to find a winner, but the system that suits your misalignment, your lifestyle and your budget. Below is an honest comparison of the strengths and weaknesses of both.

Invisible aligners — advantages

• Aesthetics. In a profession where you meet people, being invisible is a major advantage.
• Hygiene without compromise. You take them out and clean your teeth as normal.
• Fewer urgent visits. A bracket can’t come loose and a wire can’t break.
• You see the result in advance. The 3D treatment plan shows you how your teeth will look at the end.

Invisible aligners — disadvantages

• Dependence on discipline. An aligner you take out for a coffee, leave forgotten in a glass, or wear only 16 hours a day instead of the required 22 prolongs treatment and worsens its outcome.
• Limits with complex cases. A systematic review by Papageorgiou et al. in the European Journal of Orthodontics (2020) found that in adult patients, aligners achieve a poorer final bite and a higher proportion of unsatisfactory outcomes compared with fixed braces. This applies especially to larger rotations, cases requiring extraction and vertical corrections.
• Usually a higher price than metal traditional braces.

Traditional fixed braces — advantages

• A more affordable price for the metal version compared with aligners.
• They work even for the most difficult cases. Demanding molar rotations, large extraction gaps, a deep bite — fixed braces can handle almost anything.
• Independent of discipline. The teeth work 24 hours a day regardless of what you do.
• A wide choice. Metal, ceramic, self-ligating — you can tune both price and aesthetics.

Traditional fixed braces — disadvantages

• Aesthetics. Metal brackets are visible; ceramic ones help, but they aren’t invisible.
• Sore spots in the first few weeks. The soft tissue has to adapt to the brackets and wire.
• Risk of white spots. A secondary analysis of a randomised study published in BMC Oral Health (2024) shows that patients with fixed braces have poorer hygiene compared with aligners. This increases the risk of enamel demineralisation (weakening and decalcification of the tooth surface, which shows up as white spots) around the brackets.
• Unplanned visits because of a loose bracket or a broken wire.

Mild discomfort in the first few days is normal with both systems — the teeth are getting used to the pressure and the soft tissue to the new material. After a few days to a week, the discomfort usually subsides.

Mild or complex misalignment?

The boundary is rarely sharp, and only an orthodontist can assess it from a 3D scan, but as a rough guide:

Mild to moderate misalignment — slight crowding of the teeth, gaps, a mild overbite or small rotations of the front teeth.

Complex misalignment — more pronounced shifts, cases requiring tooth extraction, large molar rotations, a deep bite, or the need to correct teeth vertically.

For complex cases, traditional fixed braces have the upper hand, because they allow more precise control of movement.

Who each option suits

A rule of thumb we use at the clinic for an initial orientation:

Invisible aligners are probably the better choice if:

• You have a mild to moderate misalignment (crowding, gaps, a mild overbite, small rotations)
• You work in a profession where visible braces are an obstacle
• You are disciplined and can genuinely keep them in 22 hours a day
• You want a 3D plan and control over the result in advance

Traditional fixed braces are probably the better choice if:

• You have a more complex misalignment — larger rotations, cases requiring extraction, vertical corrections
• Price is the deciding factor
• You are a teenager or aren’t sure you can manage 22 hours a day
• You prefer “fit and forget” over a daily routine

Frequently asked questions

Are the results of invisible aligners the same as with traditional braces? For mild and moderate misalignments, yes; for complex ones, no. In adult patients, traditional fixed braces remain the gold standard for a precise final bite. Invisible aligners are a fully comparable alternative for crowding, gaps and mild rotations.

How long does treatment with invisible aligners take? Typically 6 to 18 months depending on the severity of the misalignment, and 12 to 24 months for traditional braces. The key condition with aligners: keeping to 22 hours of wear a day. If the patient doesn’t stick to the regime, treatment will take longer.

Does treatment with braces hurt? Fitting them itself doesn’t hurt. In the first few days after fitting or after changing aligners you may feel mild pressure and sensitivity in your teeth — a sign that the braces are working. With fixed braces, the soft tissue also adapts to the brackets and wire over a few days. The discomfort usually subsides within a few days.

What happens after the braces come off? Treatment doesn’t end when the braces are fitted. After they come off comes the so-called retention phase — you wear a retainer (a thin fixing wire on the inner surface of the teeth, or a clear film worn at night) that holds the teeth in their new position. Without a retainer, the teeth gradually drift back. This phase cannot be skipped and is an integral part of every orthodontic treatment.

Does insurance cover either option? For adults, insurers do not cover orthodontics as standard. For children and adolescents up to the age of 18, the insurer covers treatment with fixed braces if it is indicated by a specialist. Invisible aligners for children are not covered by insurance. (In the Czech Republic, dental care for children is largely funded through public health insurance, unlike in many other countries.)

Conclusion

Both invisible aligners and traditional braces are proven treatment systems — the difference isn’t in quality, but in suitability for a specific situation. Traditional fixed braces remain the gold standard for the most demanding cases. Invisible aligners are the ideal choice for adult patients with a mild to moderate misalignment who need discretion and are disciplined.

The best way to decide is a 3D scan and a consultation, where the type of misalignment, the treatment plan and the specific cost of both options are assessed.

Not sure which system is right for you? Book an orthodontic consultation at our clinic in České Budějovice. Based on your 3D scan we’ll tell you which system makes sense for you — and how much it will cost.