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A molar becomes loose when the bone supporting the tooth is lost
This bone is the foundation of the teeth, and it is lost when bacteria is harbored under the gums for a prolonged period of time causing an infection in the gums and bone
This is called periodontitis
Periodontitis is what causes bone loss around teeth, which causes teeth to get loose
This can be treated by a periodontist (gum specialist) that can clean the bacteria out of the gums and place bone grafts to replace the missing bone.
You can ask your dentist for a referral to a periodontist
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