--- title: "Crossbite UK: Causes, Anterior vs Posterior & Treatment" url: https://virtualconsultant.online/problems/crossbite description: "A crossbite means upper teeth bite inside the lower on one or both sides. Learn the types, how severity is graded, and whether braces or aligners can help." updated: 2026-10-15T00:00:00Z publisher: Virtual Consultant Online --- # Crossbite Explained: Types and Causes This bite pattern happens when the upper teeth sit inside the lower teeth on one or both sides. Depending on the cause, orthodontic treatment can guide the teeth back into a healthier position. Common routes include [clear aligners](https://virtualconsultant.online/treatments/clear-aligners) and [braces](https://virtualconsultant.online/treatments/braces). ## Signs your bite may have a crossbite Upper teeth sit inside the lower teeth when biting Your bite feels uneven when chewing The bite slides to one side to find a comfortable fit Teeth on one side appear to meet differently than the other ## What does a crossbite mean? A crossbite is when the upper teeth bite inside the lower teeth in one area. This reverses the normal bite relationship. Left untreated, it usually causes uneven wear, so orthodontic correction is generally recommended. The pattern can affect a single tooth or a wider section of the bite. In some cases the jaw shifts slightly to one side so the teeth can meet more comfortably. ## What causes a crossbite? **Jaw width differences:** the upper jaw may be narrower than the lower. **Tooth position:** individual teeth may tip inward or outward. **Bite shifting:** teeth may move to find stable contact. **Changes after treatment:** bite relationships may drift without retainers. ## Anterior vs posterior crossbite An anterior crossbite affects the front teeth: one or more upper front teeth sit behind the lower front teeth instead of in front of them. Left unchecked, this can wear down enamel and irritate the gum around the affected tooth. A posterior crossbite affects the back teeth, usually because the upper jaw is narrower than the lower. It can involve one side of the bite or both, and often causes the jaw to shift sideways when biting down. ## Conditions often related to crossbite This reversed bite pattern sometimes appears alongside other bite or spacing issues. Understanding the full picture helps orthodontists choose the most suitable treatment. **Overbite** Upper teeth overlap the lower teeth more than usual. [Learn about overbite →](https://virtualconsultant.online/problems/overbite) **Underbite** Lower teeth sit in front of the upper teeth. [Learn about underbite →](https://virtualconsultant.online/problems/underbite) **Crowded teeth** Crowding can influence how the bite fits together. [Learn about crowded teeth →](https://virtualconsultant.online/problems/crowded-teeth) **Open bite** Front teeth do not meet when biting together. [Learn about open bite →](https://virtualconsultant.online/problems/open-bite) ## What treatment helps a crossbite? Treatment aims to guide the bite into a healthier relationship so chewing forces are shared more evenly. Orthodontists may recommend braces or aligners depending on which teeth are affected and why. **Clear aligners:** sometimes suitable when the crossbite is caused mainly by tooth position. [Clear Aligners Overview](https://virtualconsultant.online/treatments/clear-aligners) **Braces:** often used when more bite control or broader movement is required. [Braces Overview](https://virtualconsultant.online/treatments/braces) Check Your Bite Upload guided photos to understand whether a crossbite is isolated to one tooth or part of a wider bite pattern. A clinician reviews the assessment before treatment options are suggested. 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A crossbite can be serious depending on its extent and position. Posterior crossbites create uneven bite forces that may increase wear on individual teeth, strain the jaw joints, and cause asymmetric jaw growth in children. Anterior crossbites — where upper front teeth bite behind the lower — can damage enamel and gum tissue over time. Not all crossbites are equally significant, but a clinical assessment is advisable to understand the implications for your specific bite pattern. Can aligners fix a crossbite? Clear aligners can treat some crossbites, particularly where the cause is tooth position rather than jaw size. Posterior crossbites involving one or two teeth that need tipping or rotation are often manageable with aligner treatment. Skeletal crossbites — where the underlying jaw width is the cause — often require fixed appliances, expanders, or in adults potentially surgical correction. A specialist orthodontist can advise which approach is appropriate after a clinical examination. Do crossbites get worse with time? Crossbites can worsen gradually if untreated. The bite forces from an uncorrected crossbite may cause ongoing tooth wear, jaw asymmetry, and discomfort over years. In children, jaw development can be affected by the abnormal bite loading. In adults, while the jaw is no longer growing, teeth continue to drift and bite forces continue to load asymmetrically. Early correction is generally easier and more stable than treating a crossbite that has been present for many years. How long does crossbite treatment take? Treatment time for a crossbite depends on the type, the number of teeth involved, and whether the bite also needs correcting across both arches. A simple single-tooth anterior crossbite may resolve in 3–6 months with braces or simple appliances. Posterior crossbites needing palatal expansion typically involve 3–6 months of active expansion followed by alignment, with complete treatment in a teenager including alignment taking around 12–18 months in total. Complex skeletal cases, particularly in adults, can take longer and may involve surgical planning. What causes a crossbite? Crossbites most commonly result from a mismatch between upper and lower jaw width, or individual teeth sitting inside the opposing arch. In growing children, habits such as thumb sucking or mouth breathing can contribute. In adults, crossbite is often a structural issue that has been present since the permanent teeth emerged. Can a crossbite cause jaw pain? Some crossbites cause uneven loading of the jaw joints and muscles, which can contribute to jaw discomfort or asymmetric jaw movement over time. Not all crossbites cause symptoms, but those that do may be helped by orthodontic correction. A clinician can assess whether your bite pattern is contributing to jaw symptoms during a full examination. Understanding Crossbite ### How Crossbite Is Usually Corrected Orthodontic treatment begins by understanding the bite relationship and which teeth are involved. Once the bite pattern is clear, orthodontists guide the teeth into a more balanced position using braces or aligners. [Start Photo Assessment](https://virtualconsultant.online/evaluations/quote) Takes about 5 minutes • No obligation 1. Assess the bite relationship The bite pattern is evaluated. 2. Choose the right treatment Treatment is chosen based on bite pattern. 3. Gradually adjust the bite The bite improves gradually. 4. Maintain the correction Retainers maintain results. Treatments [Explore](https://virtualconsultant.online/treatments) Problems [Explore](https://virtualconsultant.online/problems) Costs [Explore](https://virtualconsultant.online/costs) Explore your options Quick links Not sure where to start? Use these quick links to explore orthodontic treatments, typical costs, and helpful guides that explain what different options involve. Whether you're researching braces or clear aligners, comparing pricing, or just getting a feel for what comes next, you can browse at your own pace and come back when you're ready to request a quote. Explore [Get Quote](https://virtualconsultant.online/evaluations/quote) [Costs](https://virtualconsultant.online/costs) [Browse Treatments](https://virtualconsultant.online/treatments) [Teeth Straightening](https://virtualconsultant.online/treatments/teeth-straightening) [Browse Problems](https://virtualconsultant.online/problems) [Locations](https://virtualconsultant.online/locations) [Near Me](https://virtualconsultant.online/locations/orthodontic-treatment-near-me) [NHS Eligibility Checker](https://virtualconsultant.online/about/do-i-qualify-for-nhs-treatment) [IOTN Score Checker](https://virtualconsultant.online/about/iotn-score-checker) [How To Take Orthodontic Photos](https://virtualconsultant.online/about/process/how-to-take-orthodontic-photos) [Online Orthodontist](https://virtualconsultant.online/guides/online-orthodontist-uk) [Research Papers](https://virtualconsultant.online/research) [Social Channels](https://virtualconsultant.online/social) ## Want to see if crossbite can be treated? A guided photo assessment can show whether your alignment looks like crowding, relapse after braces, or a bite pattern that orthodontic treatment could improve. [Start Photo Assessment](https://virtualconsultant.online/evaluations/quote) [Explore Treatments](https://virtualconsultant.online/treatments) Takes about 5 minutes No obligation Citation details Title Crossbite UK: Causes, Anterior vs Posterior & Treatment Publisher Virtual Consultant Online Published 2024-06-01 Updated 2026-10-15 URL [https://staging.virtualconsultant.online/problems/crossbite](https://staging.virtualconsultant.online/problems/crossbite)