
When it comes to your child’s smile, nothing should be left to chance. One of the lesser-known dental issues that can affect children is a posterior crossbite. Understanding what a posterior crossbite is, why it matters, and how to address it can make a world of difference in your child’s oral health.
At Impact Orthodontics, located in the heart of Calgary, AB, we’re dedicated to helping moms like you navigate these concerns with ease and expertise. Let’s dive into the world of posterior crossbites and explore the best ways to tackle them.
Understanding Posterior Crossbite: A Hidden Dental Challenge
Imagine a well-orchestrated symphony suddenly going off-key. That’s what a posterior crossbite does to your child’s bite. This condition occurs when the upper teeth bite inside the lower teeth at the back of the mouth, causing misalignment that can affect chewing, speech, and overall oral health.
Posterior crossbite can occur on one or both sides of the mouth, known as unilateral or bilateral posterior crossbite. But don’t fret—understanding the implications and treatment options is the first step towards ensuring your child’s radiant smile.
What is Unilateral Posterior Crossbite?
A posterior crossbite is a dental malocclusion that occurs when the upper teeth bite inside the lower teeth on one or both sides when the mouth is closed. Unilateral posterior crossbite is a condition where the upper and lower back teeth do not mesh together properly on one side. This is different from an anterior crossbite, where the front teeth are affected.
Buccal crossbite is a discrepancy in the buccolingual relationship of the upper and lower teeth, where the buccal cusps of the lower teeth occlude buccal to the buccal cusps of the upper teeth.
The causes of posterior crossbite can be multifactorial, including genetic predisposition, delayed loss of baby teeth, habits like thumb-sucking, and discrepancies in jaw development. Understanding the root cause is crucial because it informs the treatment plan. If the crossbite is due to jaw misalignment, treatment may differ compared to cases caused by dental crowding.
At Impact Orthodontics, we perform a thorough examination to determine the underlying causes and develop a customized treatment plan for each patient.
The Implications of Posterior Crossbite
The implications of a posterior crossbite go beyond just aesthetics. Functionally, a misaligned bite can cause a host of problems including:
- Chewing Difficulties: When the teeth don’t align properly, it can be hard for your child to chew food effectively, which can affect nutrition and overall health. A posterior crossbite can particularly affect the maxillary posterior teeth, leading to chewing difficulties and impacting the buccal alveolar bone support.
- Speech Issues: Misaligned teeth can interfere with the way the tongue moves within the mouth, potentially causing speech impediments.
- Jaw Pain and TMJ Disorders: The uneven bite forces can strain the jaw muscles and joints, leading to pain and discomfort.
- Tooth Wear: Misaligned teeth are more likely to wear down unevenly, leading to premature enamel erosion and other dental issues.
Understanding these potential consequences underscores the importance of addressing a posterior crossbite promptly.
Practical Tip: Regular dental check-ups are crucial. Early detection of posterior crossbite can lead to simpler and more effective treatments, preventing more severe complications later on.
The Need for Surgery for Posterior Crossbite
When faced with severe posterior crossbite cases, the question of surgery often looms large. While not always necessary, surgery can be a vital solution in severe cases where the jaw growth is significantly affected or other treatments fail to correct the bite.
Our team at Impact Orthodontics evaluates each case meticulously, ensuring that surgery is recommended only when absolutely essential. Trust in our expertise to guide you through this decision with care and precision.
Indications for Surgical Intervention
Surgical intervention is typically considered when:
- Severe Jaw Misalignment: If the upper and lower jaws are significantly misaligned, surgery may be the only way to achieve proper alignment.
- Growth-related Issues: In some cases, growth discrepancies between the jaws can only be corrected surgically.
- Failure of Orthodontic Treatments: If braces or other orthodontic treatments have not been successful in correcting the crossbite, surgery may be the next step.
- Surgical intervention is often considered in adolescents with permanent dentition to correct severe jaw misalignment.
The surgical options may include procedures such as Le Fort I osteotomy, mandibular osteotomy, or surgically assisted rapid palatal expansion. These procedures aim to correct the jaw alignment and provide a stable foundation for further orthodontic treatment.
Practical Tip: Early intervention is key. Regular dental check-ups can catch posterior crossbite issues early, potentially avoiding the need for surgical intervention.
Concerns and Difficulties with Posterior Crossbite
A posterior crossbite isn’t just about aesthetics—it’s about function and health. This condition can lead to difficulties in chewing, speech problems, and even jaw pain. Left untreated, it can exacerbate into more significant issues, affecting your child’s confidence and overall well-being. Recognizing these challenges early and seeking professional advice is crucial.
A posterior crossbite can cause misalignment of the upper back teeth, leading to functional and aesthetic issues.
Statistic: According to the American Association of Orthodontists, approximately 8-22% of children have some form of posterior crossbite, highlighting the importance of awareness and early detection.
Chewing and Digestive Issues with Upper Teeth
One of the primary concerns with a posterior crossbite is the impact on chewing and digestion. When the teeth do not align properly, it can be difficult to chew food thoroughly.
This can lead to:
Nutritional Deficiencies: Poor chewing can result in inadequate digestion and absorption of nutrients, potentially impacting a child’s growth and development. The way the teeth sit in relation to each other can significantly impact chewing efficiency and lead to nutritional deficiencies.
Digestive Problems: Swallowed food that is not properly chewed can lead to digestive issues such as bloating, gas, and stomach discomfort.
Speech Impediments
Speech development is another area that can be affected by a posterior crossbite. Misaligned teeth can interfere with the tongue’s ability to form certain sounds, leading to speech impediments such as:
Lisping: Difficulty pronouncing ‘s’ sounds due to the position of the tongue.
Distorted Sounds: Other consonants may also be affected, making speech unclear.
Jaw Pain and Temporomandibular Joint (TMJ) Disorders
The misalignment caused by a posterior crossbite can place excessive stress on the jaw muscles and joints, leading to:
Jaw Pain: Constant strain on the jaw can cause chronic pain and discomfort.
TMJ Disorders: The temporomandibular joint (TMJ) can become dysfunctional, leading to symptoms such as headaches, ear pain, and difficulty opening and closing the mouth.
Recognizing these challenges and addressing them promptly is essential to prevent long-term complications.
Practical Tip: If your child complains of jaw pain or difficulty chewing, it’s important to seek an evaluation from an orthodontist. Early intervention can prevent more severe issues down the road.
Orthodontic Treatments for Posterior Crossbite Correction

At Impact Orthodontics, we offer tailored solutions to treat posterior crossbites effectively. Braces and Invisalign are two of the most common and effective treatments for crossbite correction. Braces, with their time-tested reliability, and Invisalign, with its modern, nearly invisible design, both work to gradually shift teeth into their correct positions, ensuring a harmonious bite.
For posterior crossbite correction, various appliances such as quad-helix, expansion plates, Hyrax, and Haas are also effective. These appliances help in increasing inter-molar distance and addressing other related dental issues.
Braces: The Traditional Powerhouse
Braces are a tried-and-true method for correcting dental misalignments, including posterior crossbites. They consist of metal brackets bonded to the teeth, connected by wires that apply gentle pressure to move the teeth into the desired position.
Quad-helix appliances are also effective in treating posterior crossbite in children and adolescents, often providing better results than no treatment and being more successful than expansion plates. The treatment duration with quad-helix appliances is typically shorter compared to expansion plates.
Advantages of Braces:
- Versatility: Braces can correct a wide range of dental issues, from minor misalignments to more severe cases.
- Durability: Made from strong materials, braces are designed to withstand the rigors of daily wear.
- Control: Orthodontists can make precise adjustments to the wires, ensuring effective treatment.
Practical Tip: Maintain good oral hygiene with braces. Brush and floss diligently to prevent plaque buildup and tooth decay.
Invisalign: The Modern Marvel
For those looking for a less noticeable option, Invisalign offers a clear alternative. Invisalign aligners are custom-made, removable trays that fit snugly over the teeth and gradually shift them into place.
Advantages of Invisalign:
- Aesthetics: Invisalign aligners are nearly invisible, making them a popular choice for older children and teens.
- Convenience: The aligners can be removed for eating, drinking, and brushing, allowing for greater flexibility.
- Comfort: Made from smooth plastic, Invisalign aligners are generally more comfortable than traditional braces.
Practical Tip: Consistency is crucial. Follow the orthodontist’s guidelines diligently for the best results, whether your child is wearing braces or Invisalign.
“Orthodontics can transform not just smiles, but lives. Addressing issues like posterior crossbite early can prevent a host of future problems.” – Dr. Dena Sawchuk, Orthodontist.
Choosing the Right Orthodontic Treatment
Deciding between braces and Invisalign depends on several factors, including the severity of the crossbite, the child’s age, and their lifestyle preferences.
At Impact Orthodontics, we work closely with each family to determine the best treatment option. The eruption of permanent teeth can significantly influence the choice of orthodontic treatment, as it affects the available space and alignment.
Factors to Consider
- Severity of the Crossbite: More severe cases may require the precision and control provided by braces.
- Age of the Child: Younger children may benefit from early intervention with braces, while older children and teens might prefer the aesthetics of Invisalign.
- Lifestyle: For active children involved in sports or activities, the flexibility of Invisalign can be a significant advantage.
By considering these factors, we ensure that each child receives the most effective and comfortable treatment possible.
Conclusion: A Brighter Smile Awaits
Posterior crossbites can be a daunting challenge, but with the right knowledge and support, you can navigate this journey smoothly. At Impact Orthodontics, we’re here to partner with you every step of the way, ensuring your child’s smile is as healthy and radiant as possible. Early detection, personalized treatment plans, and a compassionate approach define our practice.
Let’s work together to create a brighter, healthier future for your child. Remember, the journey to a perfect smile begins with a single step. Schedule a consultation with Impact Orthodontics today and take that step towards a lifetime of beautiful smiles.