Movement, candidacy, refinements and retention

Braces and clear-aligner questions

Answers about aligners, braces, treatment time, attachments, refinements, retainers, gum health and appliance selection.

Updated August 20, 2026Not clinically reviewed · status

Part of See Dental questions. Related: Root canal, extraction and tooth-pain questions guide · Crowns, fillings and bridge questions guide · Gum disease and grafting questions explained · See Cosmetic dentistry questions

10 evidence-scoped answers

Aligners and braces are both capable of predictable results, and these answers focus on what actually determines whether either one works for a given case. Effectiveness depends on the movements required, appliance design, wear discipline and clinician monitoring instead of the appliance name alone: no appliance corrects every problem, and skeletal relationships, impacted teeth or severe crowding may need other mechanics or surgery. Retention is not optional once active treatment ends: teeth have a tendency to move throughout life, and a retainer that has distorted or a fixed retainer that has partially debonded can allow movement while appearing to be doing its job. Root shortening at the apex is a recognized, usually limited association with orthodontic movement, monitored on radiographs during treatment. Mail-order aligner treatment differs from supervised treatment mainly in clinical oversight: whether a dentist or orthodontist examines you in person and can intervene if something goes wrong.

Existing crowns, implants and missing teeth can usually be planned around if disclosed at the outset.

Questions people ask

Common questions

10 questions, each answered on its own.

01

What is an aligner refinement?

A refinement is an additional series of aligners used when more movement is needed after the initial series. Ask how many refinement rounds, new scans and replacement aligners are included in the fee.

02

Can aligners fix every bite problem?

No appliance can be assumed to correct every problem. Skeletal relationships, impacted teeth, root position, severe crowding and complex movements may require other mechanics, surgery or a revised goal.

03

Why are retainers needed after orthodontics?

Teeth can move after active treatment while tissues adapt and throughout life. Retainers help maintain the result. Ask about type, wear schedule, cleaning, monitoring and replacement costs.

04

What happens if I lose an aligner or retainer?

Contact the treating office because the correct next step depends on treatment stage and fit. Moving forward, backward or going without the appliance can have different consequences. Replacement fees may be separate.

05

Should I choose an orthodontist or a general dentist for aligners?

Both may provide orthodontic services within their training and license. More useful questions concern diagnosis, case complexity, monitoring, contingency planning and who manages problems. Specialist consultation can be valuable for complex movement or bite concerns.

06

What is IPR or enamel reduction?

Interproximal reduction removes a very small amount of enamel from the sides of teeth to create space for movement, as an alternative to extraction or expansion where crowding is mild. It is performed in small increments, within accepted limits. The surfaces are polished afterwards. It is also irreversible, since enamel does not regenerate, so it warrants the same informed discussion as any irreversible step. Ask how much is planned in total and what the alternatives would be.

07

Will braces or aligners affect my speech?

Commonly a little at first, and it usually settles within a short period as the tongue adapts. Aligners can produce a slight lisp initially; fixed appliances can affect certain sounds. Reading aloud is often suggested to speed adaptation. Persistent difficulty is worth mentioning, since it occasionally relates to something adjustable. For most people this is a temporary adjustment, not an ongoing problem.

08

Can I have orthodontic treatment with crowns, implants or missing teeth?

Often yes, with planning. Crowned teeth can be moved, though bonding attachments to crown materials requires a different technique. Implants are the significant constraint: they are fused to bone and do not move, so they act as fixed points and the plan has to work around them. Missing teeth may be closed or the space maintained for later replacement. Tell the orthodontist about all existing work at the outset, since it shapes what is achievable.

09

Do teeth still move back even with a retainer?

Teeth have a tendency to move throughout life. Retention is what holds the result. Worn as prescribed, a retainer is designed to maintain the position achieved. Some minor change over many years is possible, and a retainer that has distorted, broken, or partially debonded in the case of a fixed one can allow movement while appearing to be doing its job. Check a fixed retainer periodically and report a removable one that no longer seats properly.

10

How does mail-order aligner treatment differ from supervised treatment?

The main difference is clinical oversight: whether a dentist or orthodontist examines you in person, takes radiographs, diagnoses what is actually happening, and monitors progress with the ability to intervene. Orthodontic movement acts on teeth, roots and the bone and gum supporting them, and existing disease or periodontal problems affect what is safe to do. Ask who is responsible for the diagnosis, what happens if something goes wrong, and whether an in-person examination is part of it.

Evidence record

Sources and answer scope

  1. Oral Health TopicsAmerican Dental AssociationAccessed 2026-08-17
  2. Periodontal (Gum) DiseaseNational Institute of Dental and Craniofacial ResearchAccessed 2026-08-17