Braces for Gaps in Teeth: How Braces Close Gaps

How the cause of a gap changes braces treatment

Braces treatment is planned around why the gap exists. A frenum-related front gap may need a frenectomy after closure to reduce relapse. A gap from a missing tooth may be closed or opened to the right width for an implant or bridge. Gaps caused by gum disease can only be closed once the gums are stable. Where teeth are simply small for the jaw, closing every space can leave a small space at the back, or bonding may be added afterwards to balance tooth widths.

What to expect while braces close a gap

Brackets are bonded to each tooth and linked by an archwire. Once the teeth are levelled, an elastic power chain is stretched across the brackets to draw neighbouring teeth together, and it is replaced at review appointments every few weeks. Teeth usually feel tender for a few days after each change. Spaces tend to close in stages, starting with the front, and the orthodontist checks that the bite and midline stay balanced as the gap shuts.

How fixed braces close gaps

Fixed braces close gaps by applying tension forces through the archwire to bring teeth together progressively. The wire exerts a pulling force on brackets attached to each tooth, gradually moving them towards the gap. For midline diastemas (the central upper gap), braces can close the space directly. For gaps related to missing teeth, braces redistribute the spaces so they are in the right position for restorative work (implants, bridges). Fixed braces are particularly effective for complex spacing where rotations or bite correction are also needed.

When clear aligners can close gaps

Clear aligners handle spacing cases well — space closure is one of the more predictable aligner movements. Aligners are particularly effective for: mild to moderate generalised spacing, single-tooth gaps up to 3–4mm, and relapse cases where a gap has re-opened after previous orthodontic treatment. They are less suited to: very large gaps requiring significant space redistribution, cases where a missing tooth space needs precise sizing for an implant, or complex spacing linked with significant bite discrepancy. Most comprehensive aligner systems (Invisalign Comprehensive, Spark) handle spacing cases reliably.

The risk of gap relapse and why retention is critical

Spacing cases have a higher than average relapse rate compared to crowding cases. Gaps tend to reopen without consistent long-term retention, particularly upper midline diastemas which have a strong natural tendency to recur. A bonded fixed retainer directly across the closed gap (bonded to the two adjacent teeth) is the most secure retention method for spacing cases. Combined with nightly removable retainers, this provides the best protection. If only removable retainers are used, any lapse in wear creates relapse risk. Discuss retention strategy specifically for your gap case before starting treatment.

Missing teeth and orthodontic space management

If a gap was created by a missing tooth (congenital absence, extraction, or tooth loss), orthodontic treatment may be used to: open the space further to make room for an implant or bridge, or close the space entirely by moving adjacent teeth together. The choice depends on tooth sizes, bite relationship, and patient preference. Interdisciplinary planning between an orthodontist and a restorative dentist (or implant surgeon) is important for these cases — treatment that opens space for an implant needs to leave the correct dimension and position.

Costs for braces and aligner treatment for gaps UK 2026

Metal braces for spacing cases: £1,500–£3,500. Ceramic braces: £2,000–£4,500. Supervised clear aligners: £1,500–£5,500, with short courses for simple gaps at the lower end. Invisalign: £2,500–£5,500. Frenectomy if required: £300–£800 (separate charge, may be done by oral surgeon or specialist periodontist). Implant or bridge following space creation: £2,500–£5,000 per tooth (separate dental treatment). Retainers: check whether included in the orthodontic fee.

Useful related pages

This guide is for general information only. It is not a diagnosis, treatment plan, or substitute for advice from a registered dentist or orthodontist.