Crossbite
Crossbite is a malocclusion in which the upper teeth overlap the lower teeth on the palatal side. It leads to tooth wear, facial asymmetry and chewing problems. Book an orthodontic consultation.
What is a crossbite?
A crossbite occurs when the upper teeth sit inside the lower teeth. The condition can be unilateral or bilateral, with genetic, functional, or environmental causes – such as abnormal development of the maxilla and mandible, mouth breathing, irregular chewing habits, or premature loss of primary teeth. Its development is also associated with prolonged thumb or pacifier sucking. Early diagnosis is crucial to prevent future complications.
Main causes
The development of a crossbite is usually associated with a combination of several factors, which include:
Genetic factors
Abnormalities in the development of the maxilla and mandible
Mouth breathing
Irregular chewing habits
Long-term dysfunctional habits (e.g. thumb or dummy sucking)
Possible symptoms of a crossbite
Symptoms of a crossbite vary depending on the severity and type of the malocclusion. The most common include: pathological tooth wear, difficulty chewing, facial asymmetry, pain or discomfort in the jaw, and problems with the temporomandibular joint.
Apart from the impact on aesthetics, which can lower a patient's self-esteem, a crossbite is often associated with temporomandibular joint (TMJ) dysfunction – headache and jaw pain, clicking in the joint, limited mobility when opening the mouth, and tinnitus. Incorrect contact between the teeth can additionally lead to tooth wear, fractures, and gum recession, increasing the risk of more serious problems in the future.
If symptoms persist, worsen, or you notice visible changes in your teeth, a dental consultation and evaluation is important.
Treatment of a crossbite differs fundamentally depending on the age of the patient at which the diagnosis is made.
