Quick comparison: all brace types at a glance
| Type | Visibility | Fixed/Removable | NHS available | Approx. private cost |
|---|---|---|---|---|
| Metal (traditional) | High | Fixed | Yes (under 18s) | £1,500–£3,500 |
| Ceramic (tooth-coloured) | Low–medium | Fixed | Rarely | £2,000–£4,500 |
| Lingual (behind teeth) | Very low | Fixed | No | £3,500–£8,000+ |
| Self-ligating (metal/ceramic) | Medium | Fixed | Occasionally | £2,000–£4,500 |
| Clear aligners | Very low | Removable | No | £1,500–£5,500 |
| Removable functional | Medium | Removable | Yes (children) | £800–£2,500 |
Metal (traditional fixed) braces
Metal braces are the most widely used orthodontic appliance in the UK. Small metal brackets are bonded to the front surface of each tooth, connected by a metal archwire that applies gentle, controlled force to move teeth over time. They are adjusted at regular appointments, typically every 6–8 weeks. NHS orthodontic treatment for children uses metal fixed braces as standard.
Advantages
Most clinically versatile — handle the full range of case complexity
Generally the most cost-effective private option
No compliance required — fixed in place
NHS-funded for eligible under-18s at no charge
Proven track record over decades
Disadvantages
Most visible brace type
Food restrictions (hard, sticky foods)
Requires careful brushing around brackets
Some initial discomfort and wire irritation
Ceramic (tooth-coloured) braces
Ceramic braces work identically to metal braces but use tooth-coloured or clear brackets instead of metal ones. The archwire may also be tooth-coloured. This makes them significantly less noticeable than standard metal braces, particularly at conversational distance. They are a popular choice for adults who want fixed brace control with reduced visibility.
Advantages
Much less visible than metal at conversational distance
Same clinical capability as metal braces
Good option when aligners are not suitable but discretion matters
Disadvantages
More expensive than metal braces
Brackets can stain with coffee, tea, and curry if not cleaned thoroughly
Slightly more fragile than metal brackets
Rarely funded by NHS
Lingual braces
Lingual braces are fixed to the back (tongue side) surfaces of the teeth, making them completely invisible from the front. They achieve similar movements to standard fixed braces. Lingual systems such as Incognito use custom-made brackets precision-manufactured for each individual tooth. They are the most discreet fixed brace option and the most expensive.
Advantages
Virtually invisible — brackets sit behind the teeth
Fixed brace control with no visible hardware
Good for professional or performance-related visibility concerns
Disadvantages
Most expensive brace type
Tongue discomfort and speech adjustment period is common
More complex to adjust — requires specialist training
Not all orthodontists offer lingual systems
Self-ligating braces
Self-ligating braces use a built-in sliding mechanism on the bracket (rather than elastic ties) to hold the archwire. Examples include Damon braces and Speed braces. The mechanism reduces friction on the wire, which may allow lighter forces during tooth movement. They are available in both metal and ceramic versions. Clinical evidence for faster treatment times versus conventional braces is mixed.
Advantages
Reduced friction may allow lighter forces
Some patients report less discomfort at adjustment appointments
Available in tooth-coloured ceramic versions
No elastic ties to stain or collect bacteria
Disadvantages
Limited evidence of clinically significant speed advantage over conventional braces
Typically more expensive than standard brackets
Not universally offered — depends on the practice
Clear aligners
Clear aligners are a series of removable, custom-made plastic trays that progressively shift teeth. Each tray is worn for approximately 1–2 weeks before moving to the next in the sequence. Invisalign is the most widely known brand, but others include ClearCorrect, Spark, and various in-house aligner systems. Aligners must be worn 20–22 hours per day to be effective. They are not suitable for all case types.
Advantages
Nearly invisible when worn
Removable for eating, drinking, and cleaning
No food restrictions
Easier to maintain oral hygiene than fixed braces
Comfortable — no metal or wires
Disadvantages
Requires strict 20–22 hours/day compliance
Less suitable for complex bite corrections or large movements
Lost or damaged trays can delay treatment
Multiple refinements sometimes needed
Not NHS-funded
Removable functional and retainer appliances
Removable appliances include functional appliances (used mainly in growing children to influence jaw growth and bite development), simple removable plates for minor tooth movement, and retainers used after active treatment. These are different from clear aligners — they are typically used for specific purposes in children's orthodontic treatment rather than as a primary treatment for tooth straightening in adults.
Advantages
NHS-funded for eligible children
Used to guide jaw development in growing patients
Removable for eating and cleaning
Disadvantages
Limited to simple tooth movements or growth guidance — not suitable for comprehensive treatment
Compliance-dependent
Not effective for most adult cases
How to choose the right brace type
No brace type is universally "best." The right choice depends on your clinical needs, how complex your case is, your budget, and your priorities. Here are the key questions to ask:
How complex is the case? Fixed braces (metal or ceramic) handle the widest range of case complexity. Clear aligners work well for mild to moderate cases but have limits for severe crowding, large overbites, or significant jaw discrepancy.
Does visibility matter? Ceramic, lingual, and clear aligner options are all more discreet than metal, but at different price points and suitability profiles.
What is the budget? Metal braces are the most cost-effective private option. Lingual braces are typically the most expensive. Clear aligners sit in the middle and vary significantly by brand and case complexity.
Can you commit to compliance? Clear aligners require 20–22 hours of wear daily. If compliance is a concern, fixed braces do not rely on patient commitment to work.
Is NHS treatment possible? NHS orthodontic treatment for under-18s uses metal fixed braces and is based on clinical need (IOTN score). Adults and cosmetic cases are generally private only.