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Orthodontics2 min read · June 15, 2026

Invisalign or Spark? A guide to clear aligners

Invisible braces in Bari: the differences between Invisalign and Spark, how aligner treatment works and who it suits. A guide by Dr. Irene Ferrara.

Clear aligners have transformed adult orthodontics: nearly invisible, removable trays that move teeth in a programmed way. Our practice is certified in both Invisalign and Spark, the two leading systems. Here is how to find your way.

How treatment works

  1. Case study: intraoral scanner (no impression paste!), photographs, digital X-rays.
  2. 3D simulation: before starting, we look together at how your teeth will move and the expected result.
  3. Series of aligners: each tray is worn for about 1–2 weeks, 22 hours a day.
  4. Periodic check-ups to verify movements follow the plan.
  5. Retention at the end, to keep the result stable over time.

Invisalign vs Spark

Both systems work very well, and the choice depends on the clinical case more than the brand. Invisalign is the best-known and most documented system, with the most mature planning platform. Spark uses the TruGEN material, appreciated for clarity and comfort, and is often competitive on cost.

The specialist's truth? The result comes from the diagnosis, not the tray. An accurate case study — cephalometrics, profile analysis, simulation — produces stable smiles with either system.

Who they suit

  • Adults correcting crowding or gaps without visible braces
  • Teenagers, with dedicated versions that account for growth
  • Relapses after old orthodontic treatments
  • Orthodontic preparation for prosthetic or implant work

For complex cases — impacted canines, significant skeletal discrepancies — we assess combined approaches, including orthodontic mini-screws or surgical-orthodontic paths where needed.

Want to know if your case suits aligners? Book a first visit: the case study will show you your future smile before you even begin.

Sources

  • WHO, Global Oral Health Status Report, 2022 — global picture of caries, gum disease and access to care.
  • WHO, Global Strategy and Action Plan on Oral Health 2023–2030 — oral health as part of general health.

Frequently asked questions

How long does clear aligner treatment take?

It depends on the case: from 6 months for minor crowding to 18–24 months for complex cases. The precise duration is defined after the case study with scanning and 3D simulation.

Are the aligners visible?

They are made of clear material and are practically invisible at conversation distance. They are worn 22 hours a day and removed only to eat and brush.

Do aligners work for everyone?

Many cases yes, but not all: some malocclusions require fixed braces or combined approaches. That is why an assessment by an orthodontics specialist is essential.

Clinical review: Dr.ssa Irene Ferrara