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Paediatrics Paediatrics

Oral disorders

In the same way that the skin protects the body from the external environment, the oral mucosa lines the entire mouth cavity, protecting it from mechanical damage, germs and toxic substances. It also controls and regulates fluid and nutrient exchange with the external environment, enables us to taste food and drink, produces the mucous lubricating the mouth and saliva (through the salivary glands). 

Mouth sores in children

It is common for this type of lesion to occur at some point time during a child's life, possibly because their immune system is still immature and because they usually suck all types of objects, their own hands or their feet. They can appear anywhere in the mouth, even on the tongue and gums. They are very painful and cause great discomfort when chewing and swallowing food.


They can have several causes. Some are infectious, such as "hand, foot and mouth" disease, primary herpetic gingivostomatitis (primo-infection by the herpes simplex 1 virus or herpes labialis), and even chickenpox, and some are non-infectious, such as those caused by recurrent aphthous stomatitis, due to using very hard teats, those occurring with first teething, those due to nutritional deficiencies or food intolerances (coeliac disease for example) or during periods of immunosuppression, etc. 

Deciduous teeth

Teething is defined as the formation and development of teeth in the oral cavity.


The milk teeth (also called primary teeth) start to emerge around the age of 6-7 months, and the process is usually completed by the age of 3 years. The first permanent teeth appear at around six years of age.


The teething process may occasionally be associated with pain and inflamed gums.



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