Misaligned teeth can be corrected through several well-established approaches, with traditional braces and clear aligners being the two most common. Which method works best depends on the severity of the misalignment, your age, and how disciplined you are with daily wear. The science behind all of these treatments is the same: controlled force applied to a tooth triggers the bone around it to break down on one side and rebuild on the other, gradually shifting the tooth into a new position. But the tools used to deliver that force, the trade-offs involved, and the newer techniques available have expanded considerably.
How Teeth Actually Move Through Bone
Every orthodontic device, whether it is a metal bracket or a plastic tray, works by pressing on a tooth with a sustained, light force. That pressure compresses the thin ligament between the tooth root and the surrounding bone on one side, while stretching it on the other. The compressed side loses bone, and the stretched side builds new bone, which is how the tooth drifts through your jaw without falling out in the process.
On the compression side, the force creates tiny microcracks in the bone and triggers cell death among the bone-maintaining cells embedded in those regions, which in turn recruits bone-dissolving cells to clear the damaged tissue.1International Journal of Oral Science. Biomechanical and biological responses of periodontium in orthodontic tooth movement: up-date in a new decade On the tension side, bone-building cells lay down fresh bone to fill the gap. The whole process is driven by an inflammatory cascade, essentially a controlled, low-grade inflammatory response confined to the area around the tooth being moved.2PubMed Central. Orthodontic tooth movement: The biology and clinical implications This is important because it means some discomfort during treatment is not just normal but is actually a sign the biology is doing its job.
One downside of this remodeling process is that the roots of your teeth can shorten slightly during treatment, a phenomenon called root resorption. The upper front teeth are most susceptible, and the risk increases with heavier forces, longer treatment times, and certain types of tooth movement like pushing a tooth deeper into its socket.3PubMed Central. External apical root resorption after orthodontic treatment: Incidence, severity and risk factors In most cases the amount of shortening is clinically insignificant, but it is one reason orthodontists monitor root length with periodic X-rays during treatment.4PubMed Central. Root Resorption in Orthodontics
Traditional Braces and Their Variations
Metal braces remain the most versatile tool for fixing misaligned teeth. They consist of brackets bonded to each tooth, connected by archwires that supply the force. Because the orthodontist can adjust wire thickness, shape, and tension at each appointment, braces handle complex movements, including rotations, vertical shifts, and closing large gaps, better than most alternatives.
You will encounter a few bracket types if you start researching options. Stainless steel brackets are the standard and produce the least friction against the wire, which means force transfers more efficiently to the tooth.5PubMed. Frictional resistance of ceramic and stainless steel orthodontic brackets Ceramic brackets are tooth-colored and less visible, but they generate more friction, which can slow certain sliding movements and sometimes requires the clinician to compensate with different wire choices.6PubMed Central. Comparative Evaluation of Friction Resistance of Titanium, Stainless Steel, Ceramic and Ceramic with Metal Insert Brackets with Varying Dimensions of Stainless Steel Wire Self-ligating brackets, which use a built-in clip instead of elastic ties to hold the wire, are marketed as faster and more comfortable. The evidence, though, suggests they do not produce meaningfully different outcomes compared with conventional brackets.7PubMed Central. Self-Ligating Versus Conventional Brackets: A Narrative Review
Lingual braces, bonded to the tongue-facing surface of the teeth, are essentially invisible when you smile. The trade-off is significant: they interfere more with speech, especially in the first weeks. One study comparing lingual and conventional brackets found that patients with lingual appliances had substantially worse articulation at every assessment point through the first months of treatment, and speech difficulties remained higher even after the initial adaptation period.8PubMed Central. Speech performance and oral impairments with lingual and labial orthodontic appliances in the first stage of fixed treatment If your job involves a lot of speaking or public presentations, that is worth factoring in.
Clear Aligners
Clear aligners work by delivering a planned sequence of small tooth movements through a series of custom-fit plastic trays, each worn for one to two weeks before switching to the next. They are removable, nearly invisible, and more comfortable for most people than fixed brackets. But they have real clinical limitations. Research comparing aligners to fixed braces has found that aligners may not be as effective at producing proper bite contacts, controlling the angle of teeth, expanding the jaw, or maintaining tooth position during retention.9PubMed Central. A comparison of treatment effectiveness between clear aligner and fixed appliance therapies For mild to moderate crowding or spacing, aligners work well. For complex cases involving significant bite correction, braces usually remain the better tool.
The biggest variable with aligners is you. Most protocols call for wearing the trays at least 22 hours a day, removing them only for eating and brushing. Falling short of that threshold slows treatment and can compromise results. A randomized controlled trial using embedded microsensors to objectively measure wear time found that patients who knew they were being monitored wore their aligners about four and a half hours more per day than those who did not.10PubMed. Objective assessment of wear time during orthodontic aligner therapy using microsensors: A randomized controlled trial That gap is striking and highlights how much self-reported compliance tends to overestimate actual wear. If you are someone who will forget to put aligners back in after lunch, fixed braces may give you a more predictable result simply because they cannot be removed.
How often you switch trays also matters. A study comparing seven-day and fourteen-day aligner change intervals found that while the fourteen-day schedule was slightly more accurate for some back-teeth movements, the differences did not cross the threshold for clinical significance, and the seven-day group finished in roughly half the time.11PubMed Central. Effect of clear aligner wear protocol on the efficacy of tooth movement Many clinicians now default to seven-day changes for straightforward cases, reserving longer intervals for patients who need difficult posterior movements.
When Surgery Is Part of the Plan
Some misalignments are not really tooth problems at all. When the upper and lower jaws are significantly different in size or position, no amount of orthodontic force can produce a stable, functional bite. Orthognathic surgery, which repositions one or both jaws, is the standard approach for these skeletal discrepancies. The process traditionally involves a phase of braces before surgery to position the teeth within each jaw, the surgical correction itself, and then a finishing phase of braces afterward. Successful outcomes depend on tight coordination between the surgeon and the orthodontist at every stage.12PubMed Central. Orthognathic surgery: general considerations
A newer approach flips that sequence. In the surgery-first protocol, the jaw surgery happens before any orthodontic treatment, using the osteotomy to resolve most of the skeletal mismatch upfront. The remaining tooth movements are then handled with braces or aligners after the bones have healed. This can shorten the total treatment timeline by six to eight months compared with the conventional sequence, partly because the body’s healing response after surgery temporarily accelerates bone remodeling, allowing teeth to move faster during the post-surgical orthodontic phase.13Florence: Interdisciplinary Journal of Health and Sustainability. Accelerated rehabilitation protocols for severe skeletal malocclusions — the synergy between minimally invasive orthognathic surgery, pre-surgical orthodontics, and rehabilitation: a narrative review 14PubMed. Orthodontic principles and guidelines for the surgery-first approach to orthognathic surgery
How Age Affects Treatment
You can move teeth at any age, but the biology responds differently depending on whether you are an adolescent or an adult. Adults tend to show slower tooth movement, especially in the early weeks. The ligament around the tooth root takes longer to reorganize, its cells show more signs of aging, and the local inflammatory environment is different.15PubMed Central. The age-related effects on orthodontic tooth movement and the surrounding periodontal environment One study measuring how quickly canine teeth moved under different force levels found that adolescents had a higher rate of movement across all force groups, and that adult biology reached its maximum response at a lower force threshold than adolescent biology.16PubMed. Age-dependent saturation of the biological response to different orthodontic forces This does not mean adult treatment fails; it means it typically takes longer and requires more patience.
Bone density and suture maturity also matter, particularly for treatments that aim to widen the upper jaw. In growing patients, the midpalatal suture has not yet fused, and palatal expansion can be accomplished with a relatively simple appliance. In adults, that suture is often fully interdigitated, making skeletal expansion far more challenging. A narrative review catalogued the most common reasons expansion fails in adults, including suture maturation, high bone density, sex (females tend to have more favorable outcomes), and even race-related anatomical variation.17PubMed Central. Why does maxillary skeletal expansion work with some adults and fail with Others?: A narrative review Adults who need true skeletal expansion often require a surgically assisted approach.
Early Intervention for Children
The American Association of Orthodontists recommends a first evaluation around age seven, and the reason is that some problems are much easier to address while the jaw is still growing and baby teeth are being replaced. Interceptive treatment in the primary or early mixed dentition phase can correct crossbites, reduce excessive overjet, and guide erupting permanent teeth into better positions. One study found that children who received early treatment showed average reductions of about 3.5 mm in horizontal incisor overlap and 2.1 mm in vertical overbite, along with improvements in skeletal relationships that reduced the complexity of any future treatment.18PubMed Central. The Impact of Early Orthodontic Intervention on Dental and Skeletal Development in Children with Mixed Dentition
Not every child needs early treatment, and not every early treatment eliminates the need for braces later. But for specific problems, particularly crossbites that cause jaw asymmetry, severe protrusion that increases injury risk, and habits like thumb-sucking that are deforming the arch, early intervention with simple appliances can either reduce the severity of what is needed later or eliminate the need for comprehensive treatment entirely.19PubMed Central. Very early orthodontic treatment: when, why and how?
Protecting Your Teeth During Treatment
Orthodontic treatment, especially with fixed braces, changes the microbial landscape in your mouth. The brackets and wires create niches where plaque accumulates, and research has shown that the oral microbiome shifts during treatment toward a higher proportion of anaerobic bacteria and periodontal pathogens, with a decrease in the commensal bacteria that normally keep things in balance.20PubMed Central. Changes in the Oral Microbiota with the Use of Aligners vs. Braces: A Systematic Review Clear aligners also disrupt the oral flora, though the overall bacterial load tends to be lower with aligners than with fixed appliances, likely because the trays are removed for brushing.21PubMed Central. A comparison of the alterations of oral microbiome with fixed orthodontic therapy and clear aligners: a systematic review
White spot lesions, the chalky white patches of enamel demineralization that sometimes appear around brackets, are one of the most visible consequences of poor hygiene during orthodontic treatment. Teeth with braces on them develop these lesions at a significantly higher rate than teeth without, because the brackets and bonding materials trap biofilm against the enamel surface.22PubMed Central. Prevention and Treatment of White Spot Lesions in Orthodontic Patients The best prevention strategy is straightforward: fluoride toothpaste plus an additional topical fluoride source. A review of six trials found that supplemental fluoride, on top of regular fluoride toothpaste, prevented roughly 40% of white spot lesions on average, and regular professional application of fluoride varnish around the bracket base during treatment had the strongest support.23PubMed Central. A review on prevention and treatment of post-orthodontic white spot lesions – evidence-based methods and emerging technologies If you are getting braces, ask your orthodontist about fluoride varnish applications at adjustment appointments.
Speeding Things Up With Light Therapy
One of the more intriguing developments in orthodontics involves using low-level light, known as photobiomodulation, to speed up tooth movement. The idea is that specific wavelengths of near-infrared light stimulate the cellular activity involved in bone remodeling, potentially accelerating the whole process. A randomized trial found that patients using a light device during the alignment phase moved teeth at roughly twice the rate of the control group.24PubMed Central. Photobiomodulation accelerates orthodontic alignment in the early phase of treatment Another trial focused on lower front tooth crowding found that the group using daily light therapy resolved their crowding about 22% faster, finishing in an average of 68 days compared with 88 days for the control group.25PubMed. Decrowding of lower anterior segment with and without photobiomodulation: a single center, randomized clinical trial
The evidence is promising but still developing. These are individual trials, not yet backed by large meta-analyses, and the devices require daily use for a set period, which introduces the same compliance challenge as aligners. Still, for patients who are motivated and want to shave weeks or months off their treatment, light-based acceleration is one of the few adjuncts with randomized trial data behind it.26PubMed Central. Accelerated Orthodontic Treatment Using Photobiomodulation: A Randomized Clinical Trial
What Happens After Treatment Ends
Getting your teeth straight is one challenge; keeping them there is another. Teeth have a natural tendency to drift back toward their original positions, especially in the first year after appliances are removed. Retention, whether with a bonded wire behind the front teeth or a removable retainer worn at night, is not optional if you want your results to last.
A four-year randomized trial comparing fixed retainers (a wire bonded to the back of the lower front teeth) with removable vacuum-formed retainers found that some relapse occurred in both groups, but the removable retainer group experienced about 1.6 mm more relapse in the lower front teeth.27PubMed. Effects of fixed vs removable orthodontic retainers on stability and periodontal health: 4-year follow-up of a randomized controlled trial Fixed retainers appear to be the better option for holding lower front tooth alignment over the long term, though both types were associated with some gingival irritation and hygiene challenges.28PubMed Central. The Effects of Fixed Versus Removable Orthodontic Retainers on Stability and Periodontal Health: 4-Year Follow-Up of a Randomized Controlled Trial The takeaway is that retention is a long-term commitment. Many orthodontists now recommend indefinite retainer wear in some form, because the forces that pushed teeth out of alignment in the first place, including soft-tissue pressure from the lips and tongue, do not disappear after braces come off.
The Psychological Side of Orthodontic Treatment
The motivation for fixing misaligned teeth is not purely cosmetic or functional. How your teeth look affects how you feel about your appearance, and research consistently shows that orthodontic treatment improves self-esteem in both adolescents and adults. A systematic review found moderate evidence that fixed orthodontic treatment improves oral health-related quality of life and self-esteem across age groups.29PubMed Central. Impact of self-esteem on the relationship between orthodontic treatment and the oral health-related quality of life in patients after orthodontic treatment – a systematic review One study of adults who needed orthodontics before dental rehabilitation reported a statistically significant increase in self-esteem and a large improvement in quality of life after treatment.30PubMed Central. Impact of orthodontic treatment on self-esteem and quality of life of adult patients requiring oral rehabilitation
There is a wrinkle, though. The treatment period itself can temporarily make things worse. A study tracking quality of life through the course of fixed orthodontic treatment found that oral health-related quality of life dropped significantly in the first three months, then gradually recovered to pre-treatment levels, while self-esteem rose by the end of treatment.31European Journal of Orthodontics. The impact of orthodontic treatment on quality of life and self-esteem in adult patients If you are an adult considering treatment and dreading the in-between months of metal in your mouth, that dip is temporary, and the self-esteem gains appear to persist.
Why Crooked Teeth Are So Common in the First Place
It is worth stepping back to ask why so many people need orthodontic treatment at all. Malocclusion affects the majority of people in industrialized societies, but fossil records and studies of traditional populations suggest this was not always the case. The leading hypothesis points to diet. Highly processed, soft foods require less chewing force during development, and lower bite forces during childhood appear to alter the growth of the jaws, resulting in arches too small for all the adult teeth. Research has linked postindustrial diets to higher frequencies of crowding, impacted wisdom teeth, and jaw joint problems.32PubMed. Implications of Vertebrate Craniodental Evo-Devo for Human Oral Health This does not mean chewing harder foods as an adult will straighten your teeth, but it does suggest that the epidemic of malocclusion is at least partly a mismatch between our modern diets and the developmental signals our jaws evolved to receive. Understanding that context is useful: it reframes misaligned teeth not as some personal flaw but as a predictable consequence of how most of us grew up eating.