Overview of scissor bite(What it is)
scissor bite is a type of bite problem (malocclusion) where the upper back teeth bite too far outside the lower back teeth.
Instead of the teeth overlapping slightly in a normal way, the upper teeth can sit completely “buccal” (toward the cheek) to the lowers.
It is most commonly discussed in orthodontics and occlusion (how teeth fit together).
Clinicians may also describe it as a “posterior scissor bite” because it often affects premolars and molars.
Why scissor bite used (Purpose / benefits)
In dentistry, the term scissor bite is used to clearly describe a specific abnormal tooth relationship in the side (posterior) part of the mouth. Naming it matters because it helps clinicians communicate what they see and plan care in a structured way.
From a clinical perspective, identifying a scissor bite can be useful because it may:
- Explain why chewing feels uneven or why certain teeth contact earlier than others.
- Help categorize a transverse problem (side-to-side mismatch) between the upper and lower arches.
- Highlight areas where teeth are not sharing bite forces as intended, which can affect comfort and function.
- Support orthodontic or restorative planning by clarifying whether the issue is primarily tooth-position related (dental) or related to jaw width/position (skeletal).
- Reduce ambiguity: a scissor bite is different from a “crossbite,” even though both involve an abnormal side-to-side relationship.
How significant a scissor bite is—and whether it needs correction—varies by clinician and case. The term itself is descriptive, not a treatment.
Indications (When dentists use it)
Dentists and orthodontic clinicians typically use the term scissor bite in scenarios such as:
- A posterior bite where the upper molars or premolars sit entirely outside the lower teeth.
- A unilateral scissor bite (one side only) versus bilateral scissor bite (both sides).
- Evaluation of a patient with chewing difficulty or an uneven bite in the back teeth.
- Orthodontic records and diagnosis (photos, study models, intraoral scans).
- Occlusal assessments before restorative work, especially if the bite relationship may affect space, contacts, or load distribution.
- Follow-up documentation when monitoring changes in tooth position during orthodontic treatment.
Contraindications / when it’s NOT ideal
Because scissor bite is a diagnosis/description (not a material or procedure), “contraindications” mainly relate to when the label is not the best fit or when other explanations should be considered.
Situations where calling something a scissor bite may not be ideal include:
- The relationship is actually a posterior crossbite (upper teeth bite inside the lower teeth), which is the opposite pattern.
- The problem is limited to a single tooth that is tipped or rotated without a broader arch relationship issue (it may be described more precisely as an isolated tooth malposition).
- The “scissor-like” appearance is caused by a temporary mandibular shift (functional shift) on closing; clinicians may prefer to document both the shift and the underlying bite relationship.
- The bite is primarily an open bite or lateral open bite (lack of vertical contact), where “scissor bite” may not capture the main issue.
- The patient has complex skeletal asymmetry or jaw discrepancy where a broader diagnosis (skeletal transverse discrepancy) may be more informative; terminology varies by clinician and case.
- When photographs/scans are insufficient to confirm the relationship; a full occlusal exam may be needed for accurate labeling.
How it works (Material / properties)
scissor bite is not a dental material, so properties like flow, viscosity, filler content, and curing behavior do not apply in the way they would for composites or cements.
The closest “how it works” explanation for scissor bite is biomechanical and anatomical—how tooth positions and arch forms create the observed bite relationship:
- Buccolingual tooth inclination (tipping): Upper posterior teeth may be tipped outward (buccally) and/or lower posterior teeth may be tipped inward (lingually). This can make the upper teeth sit completely outside the lowers.
- Transverse arch relationship (width mismatch): The upper dental arch may be relatively wide, the lower relatively narrow, or both. Whether the cause is dental (tooth position) or skeletal (jaw relationship) varies by clinician and case.
- Occlusal contacts and force distribution: When teeth do not overlap in the usual way, contacts can become uneven. Some teeth may contact heavily while others contact minimally, depending on the specific pattern.
- Functional adaptations: The jaw may adapt during closure to find contacts. In some patients, that can create an appearance of asymmetry or an uneven closing path.
When clinicians discuss “severity,” they are often describing how completely the upper teeth override the lower teeth and how many teeth are involved.
scissor bite Procedure overview (How it’s applied)
scissor bite itself is not “applied.” It is identified during diagnosis, and it may be addressed through orthodontic and/or occlusal management. That said, some correction methods can involve bonded appliances, where steps like etch/bond and curing are relevant to attaching orthodontic components.
A high-level workflow (general and varies by clinician and case) may look like:
- Isolation: Teeth are kept clean and dry for accurate assessment and, if needed, for bonding orthodontic attachments (cheek retractors, suction, cotton rolls, or isolation systems).
- Etch/bond: If brackets, buttons, or attachments are placed, enamel may be etched and a bonding agent used to adhere the attachment.
- Place: Appliances or components are positioned (for example, brackets/attachments, wires, springs, elastics, aligner attachments, or other orthodontic elements).
- Cure: If a light-cured adhesive is used for bonding, it is cured with a dental curing light according to manufacturer instructions (varies by material and manufacturer).
- Finish/polish: Excess adhesive may be cleaned, and any rough areas around attachments can be smoothed. In some cases, clinicians also perform occlusal checks and minor adjustments based on contacts.
This is an overview for understanding typical clinical sequencing, not a step-by-step guide for treatment decisions.
Types / variations of scissor bite
scissor bite can be described in several clinically useful ways. Common variations include:
- Posterior scissor bite: The most common usage, involving premolars and/or molars.
- Unilateral scissor bite: Present on one side only (right or left).
- Bilateral scissor bite: Present on both sides.
- Dental versus skeletal contribution:
- Dental scissor bite: Primarily due to tooth tipping/position within otherwise typical jaw relationships.
- Skeletal scissor bite pattern: More related to the underlying jaw width or transverse relationship; descriptions and thresholds vary by clinician and case.
- Segmental involvement: One tooth, a small group of posterior teeth, or a broader segment of the arch.
- Associated occlusal patterns: scissor bite may be documented alongside crowding, spacing, Class II or Class III relationships, open bite tendencies, or arch form differences.
- Severity descriptors: Mild/moderate/severe descriptors are commonly used informally; exact criteria vary by clinician and case.
You may also see scissor bite discussed in the context of appliances designed to change transverse relationships, but appliance choice is individualized.
Pros and cons
Pros:
- Provides a clear, standardized label for a specific posterior bite relationship.
- Helps differentiate from posterior crossbite, which has a different directional relationship.
- Useful for documentation and communication among general dentists, orthodontists, and specialists.
- Can guide which diagnostic records are most relevant (photos, scans, bite registration, occlusal analysis).
- Supports treatment planning discussions by clarifying whether the issue is localized or segmental.
- Encourages consideration of function (contacts, chewing pattern) rather than appearance alone.
Cons:
- The term is descriptive but not explanatory; it does not specify the underlying cause.
- Can be confused with crossbite by patients (and sometimes in casual conversation), since both involve side-to-side discrepancies.
- May oversimplify complex cases where multiple occlusal issues coexist.
- Does not indicate severity, symptoms, or urgency on its own.
- Different clinicians may document similar patterns with slightly different terminology, especially when skeletal factors are involved.
- Photographs alone may not capture the full occlusal relationship; interpretation can depend on records and examination.
Aftercare & longevity
Because scissor bite is a bite relationship rather than a restoration, “aftercare” and “longevity” generally refer to two things: (1) living with an existing scissor bite and monitoring it, and/or (2) maintaining outcomes after orthodontic or occlusal correction.
Factors that can influence stability over time include:
- Bite forces and chewing patterns: Uneven contacts can concentrate forces on certain teeth. How this affects comfort or wear varies by individual habits and occlusion.
- Bruxism (clenching or grinding): Parafunctional forces may influence tooth wear, muscle symptoms, and stability; impacts vary by clinician and case.
- Oral hygiene and periodontal health: Healthy gums and supporting bone help teeth maintain position. Inflammation or attachment loss can affect tooth movement tendencies.
- Retainers and follow-up (after orthodontics): Retention protocols differ, and long-term stability can depend on retainer wear and periodic monitoring.
- Growth and aging changes: In younger patients, jaw growth can change transverse relationships. In adults, gradual tooth movement can still occur over time.
- Material choice (only when appliances are bonded): If attachments are used, bonding durability can vary by material and manufacturer and by clinical conditions like moisture control.
For patients, the practical takeaway is that bite relationships can change and should be assessed periodically as part of routine dental care.
Alternatives / comparisons
scissor bite is not a restorative product, so it is not directly comparable to filling materials like flowable composite, packable composite, glass ionomer, or compomer. Those materials are used to restore tooth structure (for example, cavities), while scissor bite describes how upper and lower teeth meet.
More relevant comparisons are between scissor bite and other occlusal relationships:
- scissor bite vs posterior crossbite:
- In scissor bite, upper posterior teeth sit too far outside the lower teeth.
- In posterior crossbite, upper posterior teeth bite inside the lower teeth.
- scissor bite vs open bite (posterior/lateral):
- scissor bite involves an abnormal horizontal (buccolingual) relationship.
- Open bite involves lack of vertical contact.
- scissor bite vs single-tooth malposition:
- scissor bite often implies a segmental relationship problem.
- A single tooth that is tipped may be better described as an isolated tooth position issue.
When restorative materials are part of a broader plan (for example, reshaping contacts or restoring worn surfaces), the choice of material is a separate decision from the diagnosis of scissor bite and varies by clinician and case.
Common questions (FAQ) of scissor bite
Q: Is scissor bite the same as a crossbite?
No. scissor bite typically means the upper back teeth are positioned completely outside the lower back teeth. A crossbite usually means the upper teeth bite inside the lower teeth in that area.
Q: What causes a scissor bite?
Potential contributors include tooth tipping, differences in arch width, and how the jaws relate side-to-side. Whether the main driver is dental (tooth position) or skeletal (jaw relationship) varies by clinician and case.
Q: Can scissor bite affect chewing?
It can, because the back teeth may not contact in the usual way. Some people notice uneven chewing, while others have minimal symptoms; experiences vary.
Q: Does scissor bite cause pain?
Not always. Some patients report no discomfort, while others may notice jaw fatigue, bite interference, or tooth sensitivity depending on contacts and habits. Symptoms are not specific to scissor bite alone and can have multiple causes.
Q: How do dentists diagnose scissor bite?
Diagnosis is typically based on a clinical exam of how the teeth meet, often supported by photographs, models or intraoral scans, and sometimes radiographs. Clinicians may also evaluate jaw movement and whether there is a functional shift on closing.
Q: How is scissor bite treated?
Management may involve orthodontic approaches that move teeth or adjust arch relationships, sometimes combined with other occlusal or restorative considerations. The exact method depends on severity, age, and contributing factors; it varies by clinician and case.
Q: Is treatment always necessary?
Not necessarily. The decision to treat depends on function, stability, risk considerations, and patient goals, and it varies by clinician and case. Some scissor bites are monitored if they are stable and not causing problems.
Q: How long does correction take?
Timelines vary widely because they depend on how many teeth are involved, the amount of movement needed, and the chosen treatment approach. Your clinician typically provides an estimated timeframe after records and planning.
Q: What does scissor bite treatment cost?
Costs vary by region, provider, and treatment type (for example, limited tooth movement versus comprehensive orthodontics). It is usually discussed as a range after diagnostic records are reviewed, rather than as a single fixed price.
Q: Is scissor bite treatment safe?
Dental and orthodontic treatments are commonly performed, but all procedures have potential risks and limitations. Safety considerations depend on the patient’s oral health, planned mechanics, and monitoring, and vary by clinician and case.