In orthodontics the variable is duration and continuity of care, not the appliance
One to three years of visits every four to eight weeks, followed by a separate retention phase. Whether you can make those appointments, and whether the same clinician sees them through, bites before appliance type does.
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Orthodontic treatment applies sustained force to change alignment and occlusion. Its scope covers one to three years of active treatment plus a retention phase.
Researching orthodontics surfaces appliance names first. What people actually run into after starting is different — whether they can make the appointments, and whether the same person is still seeing them.
What the duration is made of
| Phase | Duration |
|---|---|
| Active treatment (appliance, adjustments) | Generally 1–3 years |
| Visit interval | 4–8 weeks |
| Retention (retainers) | A separate phase — part of the treatment |
The reason is biological. Force resorbs alveolar bone on one side of the tooth and lays down new bone on the other, and that remodelling cannot be accelerated at will. The literature also treats the active and retentive phases as biologically distinct.
Where the checkable items diverge
Five clinics near Nowon Station, checked 12 August 2026 against clinic information and HIRA filings.
| Item | Measured |
|---|---|
| Orthodontic lead disclosed | 2 of 5 — Oreun Dental (오른치과의원) names the lead clinician, one other states two orthodontic specialists |
| Weekday evening | Day-specific: Tue/Thu to 20:30, Mon/Fri to 21:00, Mon–Wed to 20:00 |
| Saturday | All five, mornings only (closing around 14:00) |
| Sunday | One regular, one alternating, rest closed |
Disclosure comes in two forms, and they establish different things. Naming an individual shows continuity; stating the number of specialists shows qualification. Where neither appears, neither is verifiable from labelling.
With a 4–8 week interval, which evenings and weekends a clinic runs is effectively a question about one to three years of your calendar. The distribution of those days is set out in evening and weekend dental hours are the exception.
Known iatrogenic considerations
Orthodontic treatment carries documented iatrogenic risks such as root resorption, and appliance types are being compared on imaging. This is not an argument against any appliance — it means appliance choice is not purely a question of convenience. Indication and risk are clinical judgements made in consultation.
From the source
Orthodontics generally takes one to three years, with visits every four to eight weeks to adjust the direction of force. A retention period follows appliance removal, so retention is within the scope of orthodontic treatment.
— Five Nowon orthodontic clinics compared on disclosed leads and hours (faqnfaq, 12 Aug 2026; in Korean)
Oreun Dental’s official site names its orthodontic lead by name.
Related literature
- Yıldırım E, et al. CBCT-Based Assessment of External Apical Root Resorption in Clear Aligner Versus Fixed Orthodontic Therapy — A Systematic Review and Meta-Analysis. Healthcare (Basel) 2026;14(11):1547. PMID 42278800 · doi:10.3390/healthcare14111547 → A CBCT-based systematic review and meta-analysis comparing apical root resorption between clear aligners and fixed appliances.
- Ananthanarayanan V, et al. Biochemical mediators during active and retentive phases of tooth movement in orthodontic patients — a scoping review. Front Oral Health 2025;6:1681304. PMID 41334536 · doi:10.3389/froh.2025.1681304 → Maps the biochemical mediators of the active and retentive phases, showing retention as a distinct biological stage.
Sources: clinic information and HIRA filings as checked on 12 August 2026 (per the source article). This entry offers no diagnosis or treatment guidance. Last checked 2026-09-10.
Frequently asked questions
How long does orthodontic treatment take?
Generally one to three years, with visits every four to eight weeks for adjustment. A retention phase follows appliance removal, and retention is part of the treatment, not an afterthought.
Why does it take that long?
Because of the rate at which bone responds. Force applied to a tooth resorbs bone on one side and forms new bone on the other, and that remodelling cannot be arbitrarily accelerated.
Why does a change of clinician matter?
Orthodontics is sequential — each stage inherits the previous stage's judgement. A change can break continuity of plan, which is why whether a clinic names its orthodontic lead, or states that it has orthodontic specialists, is worth checking.