My Teeth Do Not Touch When I Close My Mouth: What Could It Mean?

Author: Assoc. Prof. Dr. Halise Aydemir, Orthodontic Specialist.

If upper and lower teeth do not meet in a particular area when you close your mouth, an open bite may be considered. However, not every gap describes the same problem; which teeth lack contact and when the change began matter. Do not force the teeth together or use elastics yourself. The cause and whether treatment is needed are established by examining teeth and jaw relationships together.

What might a lack of contact between front or back teeth mean?

When the mouth closes naturally, upper and lower teeth failing to meet in one area may prompt assessment for an open bite. Not every missing contact has the same underlying structure. Which teeth meet, where the opening lies and how long it has existed are important.

The AAO bite guide distinguishes anterior and posterior open bites. With an anterior open bite, back teeth may meet without the expected overlap at the front. With a posterior open bite, the front region may meet while contact is absent at the back. One-sided or differently distributed patterns are also assessed clinically.

The following conceptual outline is neither a mouth diagram nor a diagnostic test:

• Back teeth meet → an opening remains at the front: Assessment for an anterior open bite may be appropriate.
• The front region meets → an opening remains at the back: Posterior tooth contacts need separate examination.
• A gap exists between neighbouring teeth in the same arch: This differs from contact between upper and lower teeth and is assessed as spacing.

Observation	Question to clarify at examination
Difficulty biting off food with front teeth	How the anterior bite and function are affected
No sense of contact at the back	Which teeth lack contact and in which closing position
One side touches first	Closing movement and tooth contacts
A bite that has changed recently	Onset, symptoms and previous procedures

Hypothetical example: Someone with a space between the two upper front teeth and someone whose upper and lower front teeth do not meet may both use the word gap. The first calls for assessment of neighbouring tooth positions; the second concerns the upper/lower bite relationship. Describing the location is therefore more useful than choosing an appliance name.

Do not clench or force the jaw elsewhere to test yourself. A photograph cannot show every contact in natural closure either. If your concern is spacing between front teeth in the same arch, the front-tooth spacing guide may be more relevant. In either situation, examination determines the cause and need for intervention.

How are the cause of an open bite and treatment needs assessed?

Assessment distinguishes tooth positions from jawbone relationships. Dental features may predominate in some cases and skeletal components in others, or both may coexist. The visible opening's size alone cannot establish the cause or appropriate method.

In children, dentition and growth stage, a history of thumb sucking or prolonged dummy use, and tongue position may contribute to assessment. The AAPD developing dentition guide considers these findings within development. Not every open bite is explained by a habit alone; blaming the child or using coercive measures at home is inappropriate.

The history should describe how often a habit occurs and how long it has continued, rather than only name it. A tongue that rests between the teeth for long periods is not the same finding as a brief forward movement during swallowing. Watching one swallow cannot establish the cause of an open bite or select tongue exercises. Stopping a habit also does not guarantee that an existing opening will fully close; the bite still needs follow-up.

Once adult growth is complete, changes achievable through tooth movement and goals involving jaw repositioning are discussed separately. For a new bite change, the clinician asks about recent dental procedures, ongoing orthodontics and accompanying symptoms. History helps investigate the cause rather than assign one diagnosis from the internet.

Component assessed	Meaning for planning
Tooth positions	Which movements could improve bite contacts
Jaw relationships	Limits of tooth movement and any further assessment
Growth and dentition	Timing, monitoring and development-related options
Habit or functional history	Assessment of factors that may sustain the problem
Oral health	Safe movement and care requirements

If treatment is needed, fixed braces, clear aligners, auxiliary mechanics or combined surgical care in suitable patients may be considered. Neither every open bite needs surgery nor every opening closes with aligners. The Mayo Clinic jaw surgery information explains consideration of surgery when tooth movement alone is insufficient; an individual decision requires examination.

Hypothetical example: A habit- and dentition-related situation in a growing child and a marked skeletal open bite in an adult may require different goals. Selection should explain which structure is targeted, what will remain unchanged and how the result will be maintained. The surgical suitability guide describes general limits of that option.

How should you prepare for examination, and what is monitored afterwards?

The most useful preparation is explaining when you noticed the missing contact and how it affects daily function. A longstanding appearance and a recent bite change are different histories. Mention ongoing orthodontics, a new filling or crown, trauma or previous jaw assessment.

Use concrete observations such as difficulty biting off food with front teeth or a changed sense of contact at the back right. Old photographs may help describe the starting appearance; home measurements or forced bite changes are unnecessary. Also report the timing of pain, difficult jaw movement or another new symptom.

Issue to clarify	Why it matters
The area lacking contact	Matching the concern with clinical findings
Dental and skeletal components	Separating treatment goals and limits
Need for further records	Selecting an investigation for a particular question
Reasons for monitoring or intervention	Distinguishing planned follow-up from indefinite waiting
Remaining contributors and retention	Discussing maintenance of results from the outset

Hypothetical example: Someone noticing a new lack of contact during treatment should report it directly to their orthodontist. Copying the elastic pattern of someone online with a similar appearance does not safely correct an individual plan. The relationship with the appliance, tooth movement or another cause needs assessment.

If treatment is recommended, success is not judged only by the opening disappearing in a photograph. Biting and chewing, front and back contacts, tooth positions and oral health are also monitored. The course of any habit or functional contributor identified initially may be considered. An individual retention plan is then needed to help maintain tooth positions.

Until assessment, do not attach household elastics to teeth, adjust your appliance yourself or push the jaw closed. For severe or rapidly changing symptoms, contact the appropriate clinician rather than wait for the review date. The first orthodontic appointment guide explains records and assessment; the retainer guide covers protection after treatment.

Why can one photograph not select braces, aligners or surgery?

A photograph may show a front opening without showing all back-tooth contacts or the full closing movement. Choosing braces, aligners or surgery requires assessing whether tooth positions, jaw relationships or both account for the opening.

Two hypothetical people may have front teeth that do not meet. One has had the concern for years; the other notices a new contact difference during ongoing treatment. Their histories differ despite similar photographs. The first needs current dentition and jaw assessment, while the second needs the new finding considered alongside movements planned for that stage. Similar images do not establish identical causes, procedures or durations.

Further records may be needed to answer some questions. Learning why each is requested is more useful than assuming everyone needs the same imaging package. Until assessment is complete, do not reposition the jaw to produce a better-looking bite photograph. Describe your natural bite and its daily effects. Visible opening, perceived contact differences and measurable clinical findings can then be distinguished, making the proposed method's purpose clearer.

Sources: AAO: Bite problems; AAPD: Management of the Developing Dentition and Occlusion; Mayo Clinic: Jaw surgery.

This article provides general information and does not replace an individual diagnosis or treatment plan.