Malocclusions: Causes, Types, Diagnosis and Treatment Methods
- June 5, 2025
- Braces

Occlusion is defined as the way the upper and lower jaw meets. Normal occlusion, which is a neatly aligned set of teeth, makes it possible for healthy oral functions such as chewing food properly and healthy speech development.
However, in some instances, normal occlusion doesn’t occur and this is known as malocclusion. Malocclusion refers to teeth misalignment (i.e. having crooked teeth). If left untreated, it can lead to oral health complications.
Read on to learn more about the causes of malocclusions in children and adults, types, diagnosis, treatment and FAQs!
Causes of Malocclusions
Malocclusion Causes in Children
The cause of malocclusions in children are largely hereditary. However, there are certain circumstances or habits that may alter the shape of a child’s jaw in their early years.
For example,
Cleft lip and palate
Thumb sucking when young
Frequent use of pacifier above 3 years of age
Bottle feeding for extended periods of time
Oddly shaped teeth
Impacted teeth
Injuries causing jaw misalignment
Mouth or jaw tumours
Small spaces between baby teeth