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Concept
Tooth loss
Résumé
Tooth loss is a process in which one or more teeth come loose and fall out. Tooth loss is normal for deciduous teeth (baby teeth), when they are replaced by a person's adult teeth. Otherwise, losing teeth is undesirable and is the result of injury or disease, such as dental avulsion, tooth decay, and gum disease. The condition of being toothless or missing one or more teeth is called edentulism. Tooth loss has been shown to causally reduce overall health and wellbeing as it increases the probability of depression.
Deciduous teeth#Exfoliation
Normal loss of primary teeth typically begins around age six and continues until age twelve. The upper and lower central incisors are shed at age six to seven years. The upper and lower lateral incisors are shed at seven to eight years. The upper canines are shed at ten to twelve years. The lower canines are shed at nine to twelve years. The upper and lower first molars are shed at nine to eleven years. The upper and lower second molars are shed at ten to twelve years.
As a person ages, their permanent teeth have been exposed to normal mechanical forces, such as chewing, and also more abnormal mechanical forces, such as bruxism and traumatic injury. Permanent teeth may also be affected by oral disease. There are many ways in which a person may protect their permanent teeth from loss.
The main method of preventing tooth loss is prevention of oral diseases. Tooth loss can be due to tooth decay and gum disease. Tooth decay is caused by increased plaque retention. Bacteria can then invade the plaque and cause dental caries (cavities). If cavities persist untreated for an extended period of time, tooth breakdown occurs. Plaque retention and bacterial presence also affect the gums and bone and their ability to hold the teeth in place. Disease of the gums, known as periodontitis, leads to detachment of the supporting structures from the teeth and their eventual loss. Tooth loss due to tooth decay and gum disease may be prevented by practicing good oral hygiene, and regular check-ups at a dentist's office.
Source officielle
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