The aesthetics of a smile are not limited to the whiteness of the teeth. The shape, size, position, and especially the symmetry of the teeth significantly influence the appearance of the face. However, dental asymmetry can cause not only aesthetic concerns but also negatively affect chewing function.
In this article, we will examine what causes dental arch asymmetry, how it affects health and appearance, and which treatment methods are used in leading clinics around the world and in Ukraine. Through practical examples, we will explore why correcting dental asymmetry with braces is an effective solution.
Myklosh Yarema, Chief Medical Officer, Prosthodontist, Gnathologist
What Is Dental Asymmetry and Why Should It Be Treated?
Dental asymmetry is the disproportionate positioning of teeth in the upper and lower jaws. This condition may be congenital or develop later in life. Developmental defects of the jawbone, spaces left after tooth extraction, the habit of clenching the teeth, orthodontic disorders, or trauma can all lead to dental asymmetry.
Early loss of primary teeth or improper eruption of permanent teeth also increases the risk of developing dentofacial disproportions and impaired bite symmetry. This is supported by studies showing that tooth extraction, dental caries, and harmful oral habits can affect the development of dental arches and their symmetry.
Appearance is also an important factor. Crooked or improperly positioned teeth can reduce self-confidence.
In the long term, such problems may lead to secondary complications, including pain in the jaw muscles, headaches, and tooth wear.
Research shows that bite asymmetry may be associated with temporomandibular joint (TMJ) disorders, muscle pain, and chewing difficulties.
Mild asymmetry is quite common and usually does not cause concern. In contrast, pronounced bite asymmetry is immediately noticeable and requires orthodontic correction according to modern orthodontic diagnostic approaches.
What Are the Main Causes of Dental Arch Asymmetry in Adults?
- Narrow jaw or dental arch. If a person is born with a narrow upper or lower jaw, there may not be enough space for the teeth to align properly. As a result, a crossbite may develop—a condition in which the lower teeth occlude incorrectly in certain areas and may be positioned outside the upper teeth. In addition to its aesthetic impact, this condition also disrupts the even distribution of chewing forces.
- Tooth loss (edentulism). If an adult loses one or more teeth early and does not replace them, the adjacent teeth gradually shift toward the empty space. This disrupts the bite and symmetry, causing the dental arch to collapse. Tooth movement following extraction or tooth loss is one of the most common causes of unilateral bite deviation.
- Improper habits. The habit of chewing on only one side gradually leads to uneven development of the jawbones and muscles. This creates an imbalance: one side of the lower jaw may become slightly shortened or displaced. Other harmful habits, such as prolonged thumb sucking during childhood or constantly supporting the chin with a hand, can also contribute to the development of an asymmetric bite.
- Skeletal jaw asymmetry. Congenital or acquired abnormalities in jaw development are another cause. For example, if one side of the lower jaw develops less than the other, or if there is displacement of the condylar head within the TMJ, the face will exhibit noticeable asymmetry. Skeletal abnormalities may arise due to genetic factors, trauma, or developmental disorders during growth. In such cases, the asymmetry is usually more pronounced and may require comprehensive treatment (orthodontics combined with surgery).
Why Is Dental Arch Asymmetry in Adults Treated with Braces?
The effectiveness of orthodontic treatment using fixed brace systems has been confirmed by systematic reviews of clinical studies.
These studies demonstrate that braces can not only align the dental arches and correct the bite but also address various types of dentofacial asymmetries, including unilateral bite deviations.
A brace system consists of brackets attached to the teeth and an archwire connecting them. The controlled force of the archwire gradually moves the teeth into the desired position. The main advantage of braces is the high precision of tooth movement and the ability to comprehensively correct the position of each tooth as well as the jaws as a whole.
In adulthood, the bones no longer grow, but teeth can still be moved within the surrounding bone tissue. This makes it possible to achieve proper symmetry even after skeletal growth has been completed.
Modern orthodontics offers several types of braces that differ in materials and design:
- Conventional metal braces: highly visible but durable and effective. Treatment time is usually the shortest.
- Ceramic braces: nearly invisible because the ceramic closely matches the natural color of tooth enamel. They are more aesthetic but somewhat more fragile than metal braces.
- Sapphire braces: an aesthetic orthodontic system made from artificially grown sapphire monocrystals. They are transparent, minimally visible on the teeth, and quite durable, although more expensive.
- Lingual braces: placed on the inner side of the dental arch. Due to this positioning, they remain virtually invisible to others, although they may be less comfortable and can affect speech during the initial stage of treatment.
- Removable aligners: can correct mild to moderate bite asymmetry and are almost invisible when worn. However, in cases of severe asymmetry (especially skeletal asymmetry), aligners have limited effectiveness.
The optimal treatment method is always selected by the orthodontist based on the specific characteristics of the case.
How Do Braces Work and How Long Does Treatment Take?
Regardless of their type, all braces work according to the same principle—they gradually move the teeth. In cases of bite asymmetry, the orthodontist specifically adjusts the system to align the dental midline, widen or narrow individual segments of the arch, and achieve mirror-like symmetry between the two sides.
Braces work comprehensively: they align the dental arch, modify the shape of the arch, and can even influence jaw position to some extent through the redistribution of occlusal forces. As a result, facial symmetry can often be restored without surgical intervention.
In adult patients, orthodontic treatment with braces typically lasts between 1 and 3 years, depending on the complexity of the case. The orthodontist regularly adjusts the braces, usually every 4–6 weeks, tightening the archwires and replacing elastics—small orthodontic rubber bands that create additional pressure and help guide the teeth and jaws in the correct direction.
After the braces are removed, a retention phase is mandatory to stabilize the treatment results with the help of retainers.
What Methods Are Used Worldwide to Treat Asymmetry?
Successful treatment of bite asymmetry requires a comprehensive approach.
Modern clinics around the world, particularly in the United States and Switzerland, follow several key principles.
Accurate Diagnosis Before Treatment
The American Association of Orthodontists (AAO) and the American Dental Association (ADA) emphasize that a thorough examination is the foundation of a successful treatment plan.
Before braces are placed, the following diagnostic procedures should be performed:
- Facial photographic analysis;
- Dental impressions or 3D scans;
- Radiographic imaging, including a panoramic X-ray, a lateral cephalometric radiograph (cephalogram), and, when necessary, a frontal radiograph or CT scan.
Based on these data, a step-by-step treatment plan is developed.
In Switzerland, orthodontists also extensively use digital technologies, including:
- 3D modeling;
- Computer-assisted tooth movement planning;
- Virtual smile simulation.
These technologies improve the precision and predictability of treatment outcomes.
Multidisciplinary Treatment Planning
In the treatment of complex cases of asymmetry in adults, a team of specialists often works together. In addition to the orthodontist, the patient may require the involvement of an oral and maxillofacial surgeon, a periodontist, or a prosthodontist.
A distinctive feature of the American and Swiss approach to orthodontic treatment is the use of a multidisciplinary consultation. Dental professionals from different specialties jointly evaluate the situation and develop a unified treatment strategy.
For example, if asymmetry has developed due to missing teeth, the patient may be advised to undergo dental implant placement or bridge restoration after orthodontic correction of the bite.
If the left and right sides of the jaw have developed unevenly, the treatment may begin with arch expansion and tooth alignment, followed by surgical jaw correction, after which the orthodontist completes the bite correction.
Collaborative planning from the very beginning of treatment improves efficiency and shortens treatment time.
Monitoring the Symmetry of Muscles and Joints
Straightening the teeth is only part of a successful outcome. Restoring proper function of the masticatory system is equally important.
Modern orthodontists, especially in Switzerland and Germany, place great emphasis on ensuring that patients chew evenly on both sides of the jaw after treatment.
Studies that symmetrical chewing provides balanced loading and normal functioning of the temporomandibular joints (TMJs). Therefore, the orthodontist carefully evaluates how the teeth come together and whether there is any functional deviation of the lower jaw during biting. If such problems are identified, they may be corrected through selective adjustment of individual tooth cusps or through the use of elastic traction.
Elastic traction consists of special orthodontic rubber bands worn between the upper and lower jaws according to a protocol prescribed by the orthodontist. These elastics generate controlled forces that gradually move the teeth and jaws into their proper positions, improving bite alignment and reducing asymmetry. They allow the orthodontist to more precisely center the bite and correct unilateral jaw loading.
Additionally, the patient may be referred to a gnathologist—a specialist in temporomandibular joint function—for evaluation of condylar position and masticatory muscle tone.
In some cases, exercises for the chewing muscles or physiotherapy may be prescribed to ensure coordinated muscle function on both sides of the face.
These are the same high standards of treatment that we follow at Yarema Dental Clinic in Kyiv.
Real Cases: Successful Correction of Asymmetry in Adults
The treatment of asymmetric bites is highly individualized. The following generalized clinical examples illustrate the capabilities of modern orthodontics for adult patients.
Case 1: Narrow Jaw and Shifted Midline
A 34-year-old female patient presented with noticeable smile asymmetry. The upper jaw was constricted on the right side, causing the dental midline to deviate by approximately 4 mm and fail to align with the facial midline.
A crossbite was also present on the right side. As a result, the lower portion of the face appeared slightly uneven, and the chin was shifted to the right.
Braces were placed on both jaws. Initially, the orthodontist expanded the upper dental arch on the right side using a specialized archwire. Elastic traction was also used to improve occlusion and gradually move the dental midline into the correct position.
Treatment lasted 24 months.
As a result, a symmetrical bite was achieved: the upper and lower teeth now occlude properly, and the right-sided constriction was eliminated. The face became more balanced and harmonious, with the chin centered.
The patient also reported that chewing became easier and that the unpleasant clicking sounds in the jaw had disappeared.
Case 2: Asymmetry Caused by Unilateral Chewing
A 28-year-old male patient sought treatment because of aesthetic concerns and difficulty chewing on one side.
Clinical examination revealed that the left side of the lower jaw was slightly constricted. The face appeared asymmetric, with the left mandibular angle less pronounced than the right. Examination confirmed the presence of a crossbite.
It was also discovered that the patient had chewed predominantly on the right side for many years because several restored teeth on the left side had been consciously avoided.
A fixed orthodontic appliance was recommended, and the patient chose ceramic braces due to their improved aesthetics.
Treatment lasted 18 months.
During the first stage, the braces aligned the teeth and corrected the crossbite. During the second stage, elastic traction was added to adjust the dental midline and fully balance the occlusion.
The left and right sides of the dental arches are now mirror-symmetrical. Following the orthodontist’s recommendations, the patient learned to chew evenly on both sides.
The external changes were highly noticeable: the lower jaw acquired a more symmetrical shape, and the facial proportions became balanced.
The patient himself noted that he now likes the way his face looks in photographs and feels that his smile has become more open and confident.
How Is Asymmetry Treated at Yarema Dental Clinic?
Dental arch asymmetry in adults can be successfully treated with modern orthodontic techniques. However, it is important to remember that treatment requires an individualized approach: what works for one patient may not be suitable for another.
That is why the first step is always an orthodontic consultation accompanied by a comprehensive diagnostic evaluation.
Yarema Dental Clinic in Kyiv offers a full range of services for the correction of malocclusion in adult patients. Our approach is aligned with the best international orthodontic practices, including those widely adopted in the United States and Switzerland.
We begin with a thorough examination and digital treatment planning to accurately determine the underlying causes of asymmetry.
Our multidisciplinary team of specialists—including orthodontists, surgeons, and restorative dentists—works collaboratively to develop the optimal treatment plan, which may include orthodontic correction with braces, replacement of missing teeth through prosthetic rehabilitation, and gnathological treatment when necessary.
Treatment is carried out using modern orthodontic systems, including metal, ceramic, and lingual braces, selected according to the patient’s preferences and clinical needs. We also employ the latest techniques for monitoring and controlling tooth movement throughout the treatment process.
We carefully track treatment progress and focus not only on aesthetic improvement but also on achieving optimal functional outcomes, including proper occlusion, comfortable chewing, and long-term joint health.
We combine effectiveness with aesthetics, helping our patients regain straight teeth, a balanced bite, facial harmony, and confidence in their smile.
This article does not replace a medical consultation. For complete and personalized information, please consult your dentist.