posterior open bite: Definition, Uses, and Clinical Overview

Overview of posterior open bite(What it is)

A posterior open bite is a bite relationship where the back teeth do not touch when the jaws close.
It usually refers to missing contact between premolars and/or molars on one or both sides.
Clinicians use the term in orthodontics, restorative dentistry, and occlusion (how teeth meet) assessments.
It can be a temporary finding during treatment or a stable feature of a person’s bite.

Why posterior open bite used (Purpose / benefits)

posterior open bite is not a dental material or a single procedure; it is a clinical description. Using a consistent term helps dental teams communicate clearly about where the bite is “open” and what that may mean for function, comfort, and treatment planning.

In general, the purpose of identifying and documenting posterior open bite includes:

• Clarifying the problem in plain terms: It describes a specific pattern—back teeth not contacting—rather than vague complaints like “my bite feels off.”
• Supporting diagnosis: It prompts clinicians to look for contributing factors such as tooth eruption patterns, orthodontic tooth movement, habits, airway or tongue posture considerations, or skeletal jaw relationships.
• Guiding treatment planning across specialties: Orthodontists, general dentists, and prosthodontists may coordinate differently depending on whether the open area is dental (tooth-related), skeletal (jaw-related), or iatrogenic (treatment-related).
• Reducing risk of unintended changes: Restorations, orthodontic mechanics, and occlusal adjustments can change contacts. Naming posterior open bite helps teams track whether contacts are improving, stable, or worsening.
• Setting measurable goals: “Close the posterior open bite” can be translated into observable endpoints like stable bilateral posterior contacts and improved chewing efficiency (varies by clinician and case).

Indications (When dentists use it)

Dentists and orthodontic providers typically use the term posterior open bite in situations such as:

• A patient reports that they cannot chew well on the back teeth or food “only hits in front.”
• Clinical exam shows no contact on premolars/molars when the patient bites together.
• During or after orthodontic treatment, the bite “settles” unevenly and posterior contacts are incomplete.
• One side shows contact while the other does not (unilateral posterior open bite).
• There is concern for a change in vertical dimension or occlusion after extensive dental work (occlusal alteration).
• A tooth or segment appears under-erupted (does not fully come into the bite) compared with adjacent teeth.
• Evaluation of jaw asymmetry, crossbite, or functional shift includes documenting which teeth contact.
• Planning restorative care (crowns, implants, onlays) requires a clear record of existing posterior contact patterns.

Contraindications / when it’s NOT ideal

The term posterior open bite is useful, but it is not always the most accurate or complete label. Situations where another description may be more appropriate include:

• Anterior open bite is present (front teeth do not touch) and posterior contacts are normal; “posterior open bite” would be misleading.
• The problem is primarily missing teeth (edentulous spaces) rather than an “open” relationship between existing opposing teeth.
• Apparent lack of contact is due to a temporary interference (for example, a high restoration or temporary appliance) and needs confirmation after adjustment or reassessment.
• The finding is better described as infraocclusion (a tooth sits lower than the bite plane) when the issue is limited to one tooth.
• A posterior crossbite or scissor bite (buccal-lingual discrepancy) is the main occlusal issue; contact may be present but misaligned.
• The bite cannot be assessed reliably due to pain, limited opening, or inconsistent closure, making the label premature until a repeatable bite is recorded.

How it works (Material / properties)

Because posterior open bite is an occlusal condition, material properties like flow, viscosity, filler content, and curing do not inherently apply to the condition itself.

What does “work” in posterior open bite is the way tooth position, eruption, and jaw relationships determine contact:

• Contact mechanics: Posterior contacts depend on the vertical and horizontal positions of upper and lower premolars/molars. Small positional differences can remove contact entirely.
• Eruption and settling: Teeth can continue erupting or “settling” into contact depending on forces, appliances, and bite interferences (varies by clinician and case).
• Functional influences: Muscle patterns, tongue posture, parafunction (e.g., clenching), and chewing habits can affect how contacts develop and how stable they remain.

However, materials become relevant when clinicians use bonded build-ups, temporary bite turbos, or restorations to create or guide posterior contacts during treatment. In those contexts:

• Flow and viscosity: Flowable and injectable resin composites are designed to adapt easily to tooth anatomy. Higher-flow materials spread more readily but may be chosen differently depending on where the build-up is placed and how it will be loaded.
• Filler content: In resin composites, higher filler content generally correlates with different handling and wear behavior compared with lower-filled flowables (varies by material and manufacturer).
• Strength and wear resistance: Posterior contacts experience high chewing loads. Material selection for any contact-bearing build-up or restoration often considers fracture resistance and wear, recognizing that performance varies by product, thickness, and patient factors.

posterior open bite Procedure overview (How it’s applied)

A posterior open bite itself is not applied like a filling. But clinicians may use bonded composite build-ups (sometimes called bite turbos/bite blocks in orthodontic contexts) or targeted restorations to manage occlusal contacts while a posterior open bite is being corrected or stabilized. The general workflow below describes a common adhesive placement sequence for such bonded additions, not a universal treatment plan.

Core steps often follow this order:

1. Isolation
   The tooth surface is kept clean and dry (for example, with cotton rolls, suction, or rubber dam depending on the situation).

2. Etch/bond
   Enamel (and sometimes dentin) is conditioned, then an adhesive bonding system is applied according to product instructions (varies by clinician and material system).

3. Place
   Composite material is placed in a controlled shape to create the intended contact or guidance. The goal is a planned contact pattern, not simply “adding height.”

4. Cure
   A curing light hardens the resin according to the manufacturer’s recommended time, tip position, and output considerations.

5. Finish/polish
   The surface is adjusted and smoothed so it feels acceptable to the patient and is easier to keep clean. Occlusion is checked to confirm contacts are as intended.

This sequence may also apply to small restorations placed on posterior teeth as part of broader occlusal management, but the clinical decision-making is case-specific.

Types / variations of posterior open bite

posterior open bite can be categorized in several practical ways. These categories help clinicians communicate what they see and consider likely causes.

By location and symmetry

• Unilateral posterior open bite: One side lacks posterior contact while the other side contacts.
• Bilateral posterior open bite: Both sides show missing posterior contacts.
• Segmental posterior open bite: Limited to a particular region (for example, premolars only or molars only).

By likely origin (descriptive, not definitive)

• Dental posterior open bite: Related primarily to tooth position, eruption issues, or localized factors.
• Skeletal posterior open bite: Related to jaw growth patterns or vertical/horizontal skeletal relationships.
• Iatrogenic posterior open bite: Occurs in association with dental treatment (for example, orthodontic mechanics, appliances, or restorative changes), acknowledging that causation can be multifactorial.

By timing

• Transient posterior open bite: Noted during treatment or settling phases and may change over time.
• Persistent posterior open bite: Remains stable over repeated exams and records.

Material-related variations when bonded build-ups are used (adjunctive, not the condition itself)

• Low vs high filler resin composites: Influences handling and wear behavior (varies by material and manufacturer).
• Bulk-fill flowable composites: Designed for thicker increments in some indications; whether appropriate for contact-bearing build-ups depends on product guidance and clinician preference.
• Injectable composites: Often used with matrices or guides to deliver controlled shapes; selection depends on technique and case goals.

Pros and cons

Pros:

• Provides a clear, shared label for a specific bite finding (back teeth not contacting).
• Helps structure diagnosis by prompting evaluation of dental, skeletal, and functional contributors.
• Supports interdisciplinary communication between general dentistry, orthodontics, and prosthodontics.
• Improves documentation and monitoring over time (before/during/after treatment).
• Can explain certain functional complaints such as reduced chewing efficiency or uneven bite feel (symptoms vary).
• Assists in planning restorative timing, since stable contacts often matter for crowns, onlays, and implant restorations.

Cons:

• It is a descriptive term, not a diagnosis; it does not specify the underlying cause.
• Severity can be hard to summarize without additional records (models, scans, bite registrations).
• It may be confused with missing teeth or with open bite patterns in other regions if not specified.
• The clinical significance varies by clinician and case; some patients notice major effects while others adapt.
• Bite contacts can be dynamic, changing with appliances, tooth movement, or settling, so a single snapshot may not tell the whole story.
• Addressing it may involve multiple approaches (orthodontic, restorative, habit-related), which can complicate planning.

Aftercare & longevity

Since posterior open bite is a condition rather than a restoration, “aftercare” usually means ongoing monitoring and supporting a stable occlusion over time. Longevity refers to how stable the posterior contacts remain once achieved or once the bite is considered settled.

Factors that commonly influence stability include:

• Bite forces and chewing patterns: High loading on certain teeth can affect how contacts feel and wear over time.
• Bruxism (clenching/grinding): Can contribute to tooth wear, restoration wear, and changes in contact patterns.
• Oral hygiene: Plaque control supports gum health and tooth stability; inflammation can complicate dental movement and restorative outcomes.
• Regular checkups: Periodic exams help track whether contacts are stable and whether restorations/appliances are wearing or debonding.
• Material choice (when build-ups/restorations are used): Wear resistance and fracture behavior vary by material and manufacturer, and performance depends on placement design and occlusal loading.
• Retention and settling after orthodontics: Retainers and post-treatment settling protocols differ among clinicians; outcomes vary by case.

This is general information; individual follow-up plans and expectations depend on the clinical context.

Alternatives / comparisons

Because posterior open bite is an occlusal finding, “alternatives” usually refer to other ways of describing the problem or other tools used to manage it, depending on cause.

Descriptive alternatives (terminology comparisons)

• Infraocclusion: Often used when a single tooth is below the occlusal plane, which may create a localized non-contact.
• Occlusal interference/high restoration: If one tooth contacts too early, other posterior teeth may appear “open.” In that case the key issue may be the interference rather than a true posterior open bite.
• Crossbite/scissor bite: These describe side-to-side tooth relationship problems; posterior contact may be present but functionally unfavorable.

Management tool comparisons (when adding or restoring tooth structure is considered)

• Flowable vs packable composite: Flowables adapt easily and may be used for small additions; packable (more heavily filled) composites may be selected where shaping and wear resistance are priorities. The choice varies by clinician, location, and product system.
• Glass ionomer (GI): Often discussed for certain temporary or moisture-tolerant situations; GI handling and wear differ from resin composites, and suitability depends on load and indication (varies by case and product).
• Compomer: A resin-modified material with properties often described as between composite and glass ionomer; selection depends on clinical goals and practitioner preference.
• Orthodontic approaches vs restorative approaches: When tooth position is the main driver, orthodontic correction may be central. When tooth shape/height is the limiting factor, restorations or build-ups may be considered as part of a broader plan. Many cases combine methods.

These comparisons are intentionally high level; the “right” approach depends on diagnosis, records, and clinician judgment.

Common questions (FAQ) of posterior open bite

Q: What does posterior open bite feel like?
Many people describe it as chewing mostly on the front teeth or feeling like the bite is “not even” in the back. Some notice food trapping or difficulty breaking down tougher foods. Others have minimal symptoms despite clear clinical findings.

Q: Is posterior open bite the same as an anterior open bite?
No. An anterior open bite refers to front teeth not contacting when biting, while posterior open bite refers to back teeth not contacting. A person can have one, the other, or a combination depending on the occlusal pattern.

Q: Does posterior open bite cause pain?
Not always. Some patients have no pain, while others may report muscle fatigue, uneven pressure, or sensitivity in teeth that carry more load. Symptoms vary widely and are not specific to posterior open bite alone.

Q: Can orthodontic treatment be related to posterior open bite?
It can be observed during orthodontic treatment or after appliances are removed, especially during the “settling” phase when teeth seek stable contacts. Whether it is temporary or persistent depends on mechanics, retention, and individual factors (varies by clinician and case).

Q: How do clinicians diagnose posterior open bite?
Diagnosis usually combines a clinical bite exam with records such as photographs, models or digital scans, and sometimes bite registration materials. Providers often check contacts in different jaw positions and assess whether the pattern is consistent and repeatable.

Q: How is posterior open bite treated?
Management depends on the underlying cause and can involve orthodontic tooth movement, occlusal adjustments, restorations/build-ups, or other supportive approaches. Because causes differ, treatment planning is individualized and typically based on full records and examination.

Q: How long does posterior open bite last?
Some cases are transient (for example, during treatment or while occlusion is settling), while others persist without targeted correction. Stability over time depends on diagnosis, growth patterns, tooth position, and any contributing habits or forces.

Q: Is posterior open bite “serious”?
Severity is context-dependent. In some people it mainly affects chewing efficiency or comfort, while in others it may influence restorative planning or contribute to uneven tooth loading. Clinicians assess seriousness by looking at function, stability, tooth wear, and overall oral health findings.

Q: What does posterior open bite cost to fix?
Costs vary widely because solutions range from monitoring to orthodontics to restorative care, and plans differ by case complexity and region. Any cost estimate usually requires an exam and a defined treatment plan.

Q: Are bonded composite build-ups used for posterior open bite safe?
In general, resin-based dental materials are commonly used in clinical practice, but product formulations and indications vary by manufacturer. Safety and suitability depend on factors such as placement site, bite forces, moisture control, and patient-specific considerations, which are evaluated by the treating clinician.