· 8 min
Almost every adult patient who walks into my office for a consultation on clear aligners or fixed braces asks me the same question before sitting down: "Doctor, do you recommend Invisalign or braces?". The brand is the last thing I look at. The diagnosis of your case comes first, and the right answer follows from it. I am Dr. Camila Sampaio, orthodontist, and this is the full answer.
I have held the Invisalign Diamond Provider distinction continuously since 2021, a recognition Align Technology grants to the orthodontists with the highest annual global volume of certified cases. I have treated every kind of bite with aligners, and I have also prescribed braces when that was the right call. What I can do is explain what the differences actually look like inside the mouth, not on a brochure, so you decide with judgment rather than trend.
The underlying difference is mechanical. Braces are fixed appliances: small pieces bonded to each tooth and joined by a metal arch wire. The orthodontist activates the wire and the ligatures, and that force moves the teeth permanently, day and night, with no input from the patient. It is a powerful, highly controllable system in trained hands.
Invisalign aligners are removable SmartTrack plastic trays. Each set is designed to produce a specific movement through continuous, gentle forces, and it is changed according to the digital plan. For the plastic to deliver those forces in the right direction we use attachments, small tooth-colored composite shapes bonded in calculated positions. Without attachments, certain movements are not possible; with them, they become predictable. The condition is that the aligner stays in 22 hours a day. Here is the variable that does not exist with braces: patient discipline.
Aesthetics is the reason most adults arrive asking for Invisalign. The aligners are clear and go unnoticed from a meter away. Metal braces do not. Working, teaching, or speaking in meetings for 12 to 18 months with visible wires weighs on people more than they admit. This is not a critique of braces: fixed appliances remain excellent. But for an adult choosing to treat at 35 or 50, the appearance of the appliance is a real part of the burden of treatment.
Hygiene marks a clinically relevant difference. With braces, brushing around every bracket and threading floss takes technique and time. After a year it is common to see decalcification spots, localized gingivitis, or incipient caries around the appliance. I see it every week. With Invisalign you take the tray out to brush and floss completely normally. In patients with compromised periodontium or high caries risk, this stops being a cosmetic detail and becomes a clinical argument that matters.
Daily life also includes food. Braces impose a list of sticky, hard, and stringy foods best avoided. Invisalign forbids nothing, because you take the trays out before eating. In exchange it asks for consistency: removing them only to eat and putting them back after brushing. If you are not willing to keep that routine, aligners are not your best option, and I would rather tell you straight.
Aligners handle most of the cases I see in adults very well: mild to moderate crowding, spacing and diastemas, relapse after previous orthodontics, Class I bites and many Class II bites treatable with elastics, and aesthetic corrections of the anterior sector. In these scenarios Invisalign competes head to head with braces, with the added advantage of aesthetics and hygiene.
It does work for complex cases, with nuances. Today I treat extractions, wide space closures, and bites with aligners that a decade ago were only done with fixed appliances. Digital planning and attachments raised the ceiling of what is possible. That said, there are situations where I still prescribe braces without hesitation: significant root movements in teeth with short crowns and little surface to hold attachments; some extraction closures where vertical control and torque are critical; patients who will not commit to 22 hours of wear (the best aligner in the world does not work in the drawer); and pediatric cases in active growth requiring functional appliances or expanders. If someone tells you that absolutely any case can be solved with aligners, they are selling you, not diagnosing you.
There is a myth about time. Duration is not set by the appliance, it is set by the case. Mild bites correct in 5 to 9 months with either system. Complex ones take 18 to 24 months with both. What changes between them is the planning, not the clock.
Where there is a real difference is in check-up frequency. With braces, an appointment every 4 to 6 weeks to change wires and ligatures. With Invisalign, a check every 8 to 10 weeks, because you progress the aligners at home following the certified plan. That whole plan is designed before starting in ClinCheck, movement by movement: you see on screen how each tooth will move, in what order, and how the final bite will sit. That simulation is not marketing, it is the tool I use to decide whether your case is an aligner indication. Between check-ups I monitor progress with digital tracking, and if a tooth is not taking the planned position I catch it early.
In comfort, aligners start ahead in the first months. They have no wires or ligatures rubbing against the cheek. There is a feeling of pressure during the first days of each new set, but not the ulcers and irritation typical of the first month in braces. In my experience, Invisalign patients return to their routine within 48 to 72 hours after starting a new tray.
Emergencies are another point in favor of aligners. With braces, a loose bracket or a wire end poking into the mucosa means an unscheduled visit, often on a weekend. With Invisalign that does not happen: if you lose or damage a tray, you go back to the previous one and we arrange a replacement without drama.
Sport tips the balance depending on the activity. If you play contact sports, braces require a special mouthguard that covers the appliance, and a blow can injure the mucosa against the metal. With aligners you remove the tray, use your usual mouthguard, and you are set. The same applies to wind instrument players: aligners interfere with the embouchure far less than braces. These are details that weigh more in consultation than one would imagine.
My protocol is direct and always the same. First, an iTero 5D intraoral scan: five minutes, a color, high-resolution 3D image, without the alginate impressions of the past. Then a full clinical diagnosis: occlusion, TMJ, periodontium, occlusal plane, and third molars. Only with that information do I assess the real complexity of the case.
If the case is an aligner indication, I do the ClinCheck planning and show you the plan on screen, step by step, before you commit to anything. If the case calls for braces, I tell you and explain why. The orthodontist makes the decision case by case, not the brand or the advertising. We also discuss the retention phase from the start, because the result holds only if it is cared for: teeth move throughout life, with or without prior orthodontics.
In short: I recommend Invisalign when the case is treatable with aligners and the patient values aesthetics and hygiene and is ready for the 22-hour discipline. I recommend braces when the movement demands the control of fixed appliances or when I know wear will not be consistent. Both systems straighten teeth; my job is to choose the right one for your mouth and explain it to you transparently.
If you want to know whether your case is an aligner indication, book a clear-aligner evaluation. We start with the iTero 5D scan and the ClinCheck plan before you decide anything. It is the most honest way to make this decision.
If this article left you with questions, explore the related services or book an evaluation at AS Odontología Digital in Vitacura.
Book an evaluationYes. Today I treat extractions, wide space closures, and bites with aligners that a decade ago were only done with braces, thanks to ClinCheck planning and attachments. Even so, there are large root movements and certain extraction closures where I still prefer fixed appliances. It is decided case by case after the scan.
Duration is set by the case, not the appliance. A mild bite corrects in 5 to 9 months with either one, and a complex one takes 18 to 24 months with both. What changes is check-up frequency: braces every 4 to 6 weeks, Invisalign every 8 to 10 weeks.
Aligners create a feeling of pressure during the first days of each set, without the ulcers or irritation of the wire. Braces tend to bother more in the first weeks from the metal rubbing against the cheek. For most patients, discomfort with Invisalign is managed with ibuprofen the first two days when needed.
In many cases yes. We remove the fixed appliance, take a new iTero 5D scan, and re-plan the whole case in ClinCheck from the current position of the teeth. It requires a clinical reassessment to confirm the remaining movement is treatable with aligners, but it is a change I make often.
Generally yes. We plan it in ClinCheck adapting attachments to the available surfaces. On ceramic veneers, attachment placement requires care to avoid damaging the material, but the case is viable.
I have treated patients from 14 to 70 years old. Orthodontics works at any age if the periodontium is healthy. In patients in active growth who need functional appliances or expanders, braces are sometimes still the better option.
