How Long Does Orthodontic Treatment Take

The length of orthodontic treatment depends on the clinical situation and is calculated after an in-person examination and diagnostics. On average, bite correction takes 1–2 years, and up to 3 years in complex cases. Let's look at what makes up this timeline and what can extend it.

Approximate timelines by type of problem

• Mild crowding of 1–3 mm, small gaps — 6–12 months of active treatment with aligners or braces.
• Moderate case: crowding of 4–7 mm, narrowed dental arches — 14–20 months. Teenagers may be treated with expansion appliances; adults sometimes require extraction of individual teeth.
• Pronounced malocclusions — deep, open, cross, Class III, Class II — 24–36 months. Treatment proceeds in several stages: creating space, aligning the arches, correcting the jaw relationship, and final detailing.
• Complex skeletal problems — 18–24 months of preparation, orthognathic surgery, and post-operative correction. The plan is drawn up together with a maxillofacial surgeon.

Why the exact timeline is given only after diagnostics

The treatment plan is built on digital diagnostics: a photo protocol, 3D scanning of the dental arches, and cone-beam CT when needed. For aligners, a virtual setup is created with a precise calculation of the final result and duration. The timeline is affected by a combination of factors.

Condition of the roots and bone

Short or curved roots and signs of resorption after previous treatment limit the permissible force. Jaw bone is not uniform: in the inner spongy layer, roots move freely, while the dense cortical plate stops movement. Increasing the pressure is not an option; it does not speed up treatment but provokes root resorption, gum recession, and tooth mobility.

The temporomandibular joint

With bruxism, clicking, or jaw locking, preliminary gnathological treatment may be needed: splints and relaxation of the chewing muscles. The path of tooth movement is planned so as not to worsen joint dysfunction.

Gum biotype

Thin gums are at risk of recession. In such cases, the doctor plans movements with minimal load, giving the tissues time to adapt.

Age and type of bite

Bone remodelling is faster in teenagers and slower in adults. The more complex the malocclusion, the more stages and time are required.

Patient discipline

Aligners work only when worn 20–22 hours a day and changed on schedule. Braces require wire activation every 4–6 weeks without missed visits. In many cases, intermaxillary elastics are needed. Failing any of these conditions extends treatment.

Treatment stages from consultation to retention

1. Consultation — examination, assessment of the bite and facial symmetry, discussion of your wishes.
2. Diagnostics — photo protocol, 3D scanning, CT if needed.
3. Planning — a 3D model of tooth movement, choice of system, calculation of stages and timelines.
4. Preparation — treating decay, replacing old fillings, professional hygiene.
5. Active treatment — check-ups every 4–6 weeks with braces and every 5–6 months with aligners. The doctor compares tooth movement with the plan.
6. Detailing — refining the occlusion and the position of individual teeth, eliminating premature contacts.
7. Retention — fixed retainers on the inner surface of the front teeth and night-time trays.

What can prolong treatment

• Missed visits. The doctor cannot issue new trays or change wires on time. Book your next appointment right away.
• Poor hygiene. Inflamed gums transmit pressure to the teeth less effectively. Brush after every meal, use interdental brushes and an irrigator, and see a hygienist every 3–4 months.
• Appliance breakage. A debonded bracket or cracked tray stops movement, and within 1–2 days the teeth begin to drift back. Contact the clinic immediately in case of any breakage.
• Irregular wear of elastics. Without them, the jaw relationship cannot be corrected, and treatment simply stalls.
• Individual tissue response. Smoking, hormonal changes, diabetes, osteoporosis, and certain medications slow bone remodelling. Tell your doctor about chronic conditions in advance.

Can treatment be sped up

Tooth movement cannot be accelerated: the bone needs time to remodel as the roots move. Forcing the process leads to root resorption, gum recession, pain, and an unstable result.

Retention after treatment

Once the appliance is removed, the stretched periodontal fibres try to pull the teeth back to their former position. That is why retainers are a mandatory final stage. Retention lasts at least twice as long as the active phase: if you wore aligners or braces for a year and a half, plan on retention for at least three years. Skipping retention negates the result, and relapse can appear within the first weeks.