Hypodontia and Orthodontics UK

What is hypodontia?

Hypodontia is the congenital absence of one to five adult (permanent) teeth, not counting wisdom teeth. It is distinct from tooth loss through decay or trauma — hypodontia means the tooth simply never developed. The most commonly absent teeth are upper lateral incisors (the teeth either side of the upper front teeth), lower second premolars, and upper second premolars. When six or more teeth are congenitally absent the condition is called oligodontia, which may be associated with genetic syndromes and requires specialist multidisciplinary management. Hypodontia runs in families and is more common in patients who also have smaller or differently shaped teeth (peg laterals) or a narrow dental arch.

The two main treatment approaches: space closure vs space opening

When a tooth is congenitally absent, the two fundamentally different orthodontic approaches are space closure and space opening. Space closure uses braces or aligners to move adjacent teeth into the gap, eliminating the space entirely — meaning no implant or bridge is needed. Space opening uses orthodontics to create or maintain the correct amount of space for a future dental implant or bridge to replace the missing tooth with a prosthetic. The choice between approaches depends on the size of the gap, the number of missing teeth, the bite relationship, the patient's age, and the overall aesthetic goals.

Space closure: when adjacent teeth fill the gap

Space closure is often the preferred option for missing upper lateral incisors or lower premolars where the adjacent teeth can be moved into position without creating a bite problem. In the upper arch, the canine tooth can be moved into the lateral incisor position and then reshaped with composite bonding or a veneer to look like a lateral incisor. This avoids the need for a lifelong implant or bridge. Space closure works best in cases where the overall arch has mild crowding — closing the space also addresses the crowding. It is generally less successful where a significant number of teeth are missing or where the bite would be compromised by closing all the spaces.

Space opening: creating room for implants or bridges

Where the best aesthetic and functional outcome involves replacing the missing tooth with a prosthetic, orthodontics is used to create or maintain the correct space — the right width, in the right position — for an implant or bridge. This is particularly common for missing upper lateral incisors in patients where the canine has already erupted into the lateral position and moving it back would create other bite problems. The orthodontic phase comes first, followed by a holding retainer to maintain the space, and then the implant or bridge once jaw growth is complete (typically age 18 to 20 for implants). Implants cannot be placed during adolescence as the jaw is still growing.

Hypodontia in children: early management

Hypodontia is often first identified on panoramic x-rays taken between ages 8 and 12, when the absence of developing adult teeth can be confirmed. Early identification allows space management planning before the adult teeth have fully erupted. In some cases, a baby tooth that has no adult successor is retained deliberately — it may last into adulthood and act as a natural space filler. In other cases, orthodontic space management from an early age prevents adjacent teeth from drifting into the gap and makes later treatment more straightforward. Children with hypodontia should ideally be referred to a specialist orthodontist for assessment.

NHS treatment for hypodontia

NHS orthodontic treatment is available for hypodontia cases that score an IOTN grade of 3.6 or above — which many hypodontia cases do. More complex cases involving multiple missing teeth may qualify for treatment at a hospital-based dental department with a multidisciplinary team (orthodontist, restorative dentist, oral surgeon). NHS implants are available in some cases through hospital departments for patients with significant hypodontia, though access varies by region and waiting times can be long. Private treatment is significantly faster to access and allows greater flexibility in the treatment approach chosen.

Multidisciplinary treatment planning

Complex hypodontia is best managed by a team rather than a single clinician. The orthodontist manages tooth alignment and space; the restorative dentist or prosthodontist designs the implant crown, bridge, or composite restoration; the oral surgeon or implantologist places the implant; and in some cases the periodontist manages the gum tissue around the implant site. If you have been told you need both orthodontic treatment and implants, asking for a multidisciplinary treatment plan — ideally with a shared record of what space dimensions are needed and when — is important to avoid the orthodontic space closing before the implant is placed.

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.