While fixed brackets and wires are the most visible components of orthodontic treatment, many patients require supplementary appliances to achieve a fully functional and stable bite. Braces are exceptionally effective at aligning individual teeth, but they often need additional assistance to correct jaw discrepancies, manage space, or influence the relationship between the upper and lower dental arches. These auxiliary devices work in conjunction with your braces to address complex structural issues that cannot be resolved by wires alone.
What We’ll Discuss in This Article
- The role of inter-arch elastics in correcting bite misalignments
- How palatal expanders create necessary space in the upper jaw
- The function of functional appliances in managing jaw growth
- The use of temporary anchorage devices for precise tooth movement
- When and why headgear may still be used in modern orthodontics
- The purpose of space maintainers and bite blocks during treatment
The Role of Inter-Arch Elastics
The most common supplementary appliance used with braces is inter-arch elastics, often referred to as “rubber bands.” These elastics are stretched between specific hooks on the upper and lower braces to apply the continuous force necessary to move the entire dental arches into a correct relationship. The NHS provides information on how various orthodontic appliances, including elastics, are used to treat problems such as overbites, underbites, and crossbites. Because elastics are removable, their success depends entirely on the patient wearing them for the exact number of hours prescribed by the orthodontist each day.
Creating Space with Palatal Expanders
For patients with a narrow upper jaw or significant crowding, a palatal expander may be used before or during the early stages of wearing braces. This appliance is fixed to the upper molars and gradually widens the two halves of the upper jawbone, which are not yet fully fused in children and young adolescents. By widening the palate, the expander creates the physical space required for permanent teeth to erupt and align correctly. NICE provides clinical guidelines on oral health assessments, ensuring that appliances like expanders are used appropriately to support the structural development of the dental arch.
Managing Jaw Growth with Functional Appliances
Functional appliances are used primarily in growing children to correct significant discrepancies between the upper and lower jaws, such as a receding lower jaw. Devices like the Twin Block consist of upper and lower removable plates that hold the jaw in a forward position, encouraging the muscles and bone to adapt to a more balanced relationship. These are often used for a period of nine to twelve months before or alongside fixed braces. Correcting these skeletal issues while the patient is still growing can often prevent the need for more invasive jaw surgery in adulthood.
Precision Movement with Temporary Anchorage Devices
Temporary Anchorage Devices (TADs) are small, medical-grade titanium screws that are temporarily placed in the jawbone to provide a fixed anchor point. In traditional orthodontics, moving one tooth often causes the “anchor” teeth to move as well; TADs allow the orthodontist to move specific teeth in a precise direction without affecting the others. GOV.UK outlines the standards for dental services to ensure that specialised procedures involving anchorage devices are performed safely and that patients are fully informed of their clinical purpose. These devices are removed once the specific tooth movement has been achieved.
The Continuing Utility of Orthodontic Headgear
Although less common today due to advances in other appliances, headgear remains a highly effective tool for addressing severe bite issues or managing the growth of the jaw. Headgear consists of a wire frame (facebow) attached to the braces and a strap that fits around the back of the head or neck. It provides the external force needed to hold back the growth of the upper jaw or to move molars backward into a better position. Most patients are instructed to wear headgear only during the evening and overnight to reach the required number of hours for clinical efficacy.
Maintaining Space and Correcting Bites
Other smaller appliances may be used to address specific local issues within the mouth. Space maintainers are used if a primary (baby) tooth is lost too early, preventing the remaining teeth from shifting into the gap before the permanent tooth is ready to emerge. Bite blocks or “bite turbos” are small pads bonded to the teeth to prevent the upper and lower teeth from meeting fully; this is often necessary in patients with a “deep bite” to prevent them from accidentally biting off their lower brackets while the alignment is being corrected.
Conclusion
Achieving a healthy, aligned smile often requires more than just the application of brackets and wires. From the simple use of elastics to the precision of anchorage devices and the structural changes provided by expanders, these supplementary appliances are vital for correcting complex dental and skeletal issues. Your orthodontist will determine which, if any, of these tools are necessary based on your specific clinical needs. Adhering to the instructions for these devices is essential for ensuring your treatment stays on track and achieves the best possible outcome. If you experience severe, sudden, or worsening symptoms, call 999 immediately.
Are elastics always necessary with braces?
Not every patient needs elastics. They are specifically used to correct the relationship between the upper and lower teeth. If your teeth are crowded but your bite is already well-aligned, you may not require them.
Do palatal expanders hurt?
When the expander is adjusted, you may feel a sensation of pressure across the bridge of the nose or the cheekbones. This is normal and typically subsides within a few minutes as the tissues adapt.
How long will I have to wear functional appliances?
Functional appliances are usually worn for 9 to 12 months. This phase is often followed by a period of fixed braces to fine-tune the positions of the individual teeth.
Is it painful to have a TAD placed?
The placement of a TAD is performed under local anaesthesia, so you should not feel any pain during the procedure. You may experience some mild pressure or tenderness for 24 hours afterward.
Can I wear headgear only at night?
Most orthodontists recommend wearing headgear for 10 to 14 hours a day. This usually means it must be worn throughout the evening and while sleeping to be effective.
What happens if I forget to wear my elastics?
Failing to wear your elastics as instructed will significantly slow down your treatment. The teeth will not move into the correct bite position, and your total time in braces will likely be extended.
Will I have trouble speaking with a Twin Block?
At first, you may notice a slight lisp or increased salivation. However, most patients adapt quickly and learn to speak clearly within a few days of consistent wear.
Authority Snapshot (E-E-A-T)
This clinical education material is developed by a dedicated medical team, including Dr Stefan Petrov, to help patients understand the various appliances used in UK orthodontic care. Dr Stefan Petrov is a UK-trained physician whose expertise ensures that all information provided is accurate and aligned with current medical standards. All guidance follows the protocols established by the NHS and NICE to support high-quality, patient-focused health content.
