whats the main reason of cause periodontal diseases?

[stanly]

my friend suffers tooth pain last month..he visit local dental doctor but he said just tooth decay problem..and a famous doctor told may it is periodontal disease..i was shocked whats the main it causes?

 

[Busybee]

Gum disease can run in families or can be down to bad diet, smoking,poor dental hygiene. Same for tooth decay. Some people are more prone to it, but others don't look after their teeth. Regular appointments with a periodontist help manage the condition.

 

[Uptown101]

The main cause of periodontal disease is bacterial plaque, a sticky, colorless film that forms on your teeth. Bacterial plaque isn’t the only cause though. Other factors, like the following can also affect the health of your gums like Smoking or Tobacco Use, Genetics, Pregnancy and Puberty, Stress, Medications, Clenching or Grinding Your Teeth, Diabetes, Poor Nutrition and other Systemic Diseases that interfere with the body's immune system.