An edge-to-edge bite is a malocclusion in which the upper and lower front teeth meet directly, with the incisal edges contacting each other. This can compromise aesthetics and affect chewing function. Causes may include genetic factors, parafunctional habits, or underlying skeletal characteristics. If left uncorrected, an edge-to-edge bite may contribute to progressive wear, tooth sensitivity, and other long-term oral health concerns. In this article, we will review a real clinical case treated with fixed braces, demonstrating an effective approach to correcting an edge-to-edge bite and restoring a confident, healthy smile.

Midline Deviation of the Front Teeth

Many people assume that a midline deviation of the front teeth—or a lower jaw that appears positioned forward—is only a minor cosmetic concern. In reality, these bite discrepancies, including edge-to-edge bite, may indicate underlying skeletal imbalance or uneven jaw development. When the upper and lower incisors contact directly with little or no overbite, chewing forces are concentrated on the incisal edges, increasing the risk of enamel wear, sensitivity, and even long-term tooth mobility. In addition, an unstable bite can reduce chewing efficiency and may affect overall digestion and wellbeing. A forward-positioned lower jaw, often associated with an underbite (anterior crossbite), is a common malocclusion that should be evaluated early to establish an appropriate treatment plan.

Understanding an Edge-to-Edge Bite

What is an edge-to-edge bite? It is a bite relationship in which the incisal edges of the upper front teeth contact directly with the incisal edges of the lower front teeth when the jaws close. In an ideal bite, the upper incisors overlap the lower incisors by a small amount (approximately 2–3 mm), known as the overbite.

The typical signs:

• The upper and lower front teeth meet edge-to-edge, even in a relaxed bite.
• There is little to no vertical overlap between the upper and lower incisors when you close your mouth.
• Visible wear along the incisal edges, sometimes accompanied by sensitivity.

Common causes:

• Genetic factors: Imbalanced jaw growth and skeletal proportions.
• Oral habits: Prolonged thumb sucking, tongue thrusting, or chronic lower-lip biting.
• Early tooth loss: Shifting of adjacent teeth and progressive bite changes affecting overall occlusion.

Complications and risks:

• Accelerated tooth wear and increased sensitivity.
• Potential strain on the temporomandibular joint (TMJ), which may contribute to jaw discomfort or pain.
• Difficulty biting and tearing food effectively.
• Reduced smile aesthetics, which can impact confidence.

Understanding why the lower teeth/jaw appear forward

A forward-positioned lower bite—often referred to as an underbite or Class III malocclusion—occurs when the lower teeth and/or the lower jaw are positioned ahead of the upper jaw. This can affect facial balance and significantly compromise chewing function.

Common causes:

• Genetics: Family history is a major contributing factor.
• Jaw growth pattern: Excessive mandibular growth and/or underdevelopment of the upper jaw.
• Oral habits: Tongue thrusting during swallowing, pushing the tongue forward over time.

Signs:

• The lower front teeth are positioned ahead of the upper front teeth.
• The chin may appear more prominent or positioned forward.
• Difficulty chewing, biting, and tearing food.

Prevention and care:

Prevention should begin early in childhood. Parents are encouraged to observe and address harmful oral habits as soon as they are noticed. During the mixed-dentition phase and throughout adolescence, regular dental check-ups are essential to detect and manage bite discrepancies at the right time.

Clinical case: Managing an edge-to-edge bite with mild Class III tendency

A 20-year-old female patient, T.Đ.T.H., visited Herident seeking correction of a forward lower bite, which caused chewing discomfort and reduced confidence when smiling. An edge-to-edge bite not only affects aesthetics, but may also pose long-term risks to oral health if not properly addressed.

Initial Clinical Findings

Patient H presented with a relatively balanced facial skeletal profile, with the facial midline aligned with the maxillary (upper arch) midline. However, intraoral examination revealed the following:

• Anterior occlusion: An edge-to-edge incisal relationship, with the upper and lower incisal edges contacting directly.
• Posterior occlusion: Bilateral canine and first molar (tooth #6) relationships consistent with a Class III tendency.
• Dental midlines: The mandibular (lower arch) midline was mildly deviated approximately 1.5 mm to the left relative to the maxillary midline and facial midline.
• Mild crowding in both arches, with a slightly narrow maxillary arch form.
• Good overall oral health, with no signs of caries or periodontal disease.

Detailed Diagnostic Analysis

Based on the clinical examination and cephalometric radiographs, the Herident orthodontic team established the following diagnosis:

• Edge-to-edge bite in the anterior (incisor) region.
• Mild crowding in both arches.
• Slightly narrow maxillary arch.
• Skeletal Class I relationship (ANB = 2°, with a normal FMA indicating balanced skeletal proportions).
• Dental Class III tendency at the canine and first molar relationships bilaterally.
• Lower incisors with a tendency toward labial inclination (proclination).

Optimal Treatment Protocol

The primary objectives of the treatment plan were to comprehensively correct occlusal discrepancies and achieve both functional and aesthetic harmony:

• Correct the edge-to-edge bite and re-establish a normal incisor overbite/overjet relationship.
• Align and level the teeth in both arches.
• Improve the Class III canine and first molar relationships toward Class I.
• Enhance overall smile aesthetics and facial balance.

The chosen approach was fixed metal braces combined with adjunctive appliances/mechanics to optimize outcomes without tooth extractions.

Detailed Orthodontic Treatment Procedure

Patient H’s treatment plan included the following advanced steps:

1. Bracket placement: Fixed metal braces using the MBT 0.022″ prescription in both arches.
2. Archwire sequence: Progressive archwires with increasing dimensions and stiffness were used to deliver controlled tooth movement.
3. Miniscrews (TADs): Two miniscrews were placed in the mandibular arch to provide stable anchorage. This anchorage was used to distalize the lower posterior segment, helping to correct the Class III tendency and create appropriate incisor overjet/overbite.
4. Occlusal finishing: The final phase focused on fine-tuning tooth positions to achieve ideal intercuspation and stable functional contacts between the upper and lower posterior teeth.
5. Retention phase: After debonding, the patient was instructed to wear retainers (clear removable and/or fixed lingual retention) to stabilize results long-term and minimize relapse.

Treatment Duration and Outcomes

Total treatment time for this case was 20 months. Upon completion, the clinical results were highly favorable:

• Incisor relationship: The edge-to-edge bite was fully corrected, establishing a normal overbite of approximately 2–3 mm.
• Alignment: Teeth in both arches were well-aligned, with improved arch form and harmony.
• Posterior occlusion: Canine and first molar relationships achieved an ideal Class I occlusion.
• Aesthetics: Noticeable improvement in smile aesthetics and facial balance, supporting greater patient confidence.

Patient H reported high satisfaction with the treatment outcome.

Is Orthodontic Treatment Effective for Mild Class III Malocclusion?

For mild Class III malocclusion, orthodontic treatment can be highly effective and deliver meaningful improvements. With modern adjuncts such as miniscrews (TADs), achieving controlled tooth movement and bite correction is more predictable than ever. That said, outcomes still depend on several key factors—including the severity and cause of the discrepancy, the clinician’s treatment plan and biomechanics, and the patient’s compliance throughout treatment.

How Much Does Edge-to-Edge Bite Orthodontic Treatment Cost?

The cost of orthodontic treatment for an edge-to-edge bite can vary depending on the chosen method (metal braces, ceramic braces, or Invisalign), the complexity of the case, and each clinic’s pricing policy. For an accurate estimate, it is best to have a clinical examination and individualized consultation at a reputable dental center. At Herident, orthodontic fees are presented transparently, with detailed, case-specific guidance for every patient.

The clinical case of patient T.Đ.T.H. is a strong example of how fixed braces can effectively correct complex bite discrepancies, including an edge-to-edge bite and a mild Class III tendency. At Herident, we are proud to have a highly trained orthodontic team with extensive clinical experience, supported by modern technology—allowing us to deliver treatment plans that are both precise and outcome-driven. If you are experiencing bite concerns or would like to enhance your smile aesthetics, we invite you to contact us to schedule a complimentary consultation. Herident – Specialized in Orthodontics, Ceramic Restorations, and Implants, shaping smiles to a clinical standard.