Periodontology
...Smoking and chewing tobaccoPoor diet, especially one high in sugarPoorly fitting dentures or bridges, misaligned teeth, defective fillingsGrinding or clenching the teethPregnancy or use of oral contraceptivesMedications: steroids, cancer therapy drugs, some calcium channel blockers, some anti-epilepsyDrugs (consult your dentist/periodontist)Systemic diseases such as HIV or diabetesCan Periodontal Disease Be Prevented...

Periodontal Treatment
...Since the procedure adjusts the gum and bone levels to expose more of the tooth surface, it is easier to restore these teeth with cosmetic fillings and crowns...

Veneers
...Porcelain veneers can mask undesirable defects, such as teeth stained by tetracycline, by an injury, or as a result of a root-canal procedure, and are ideal for masking discolored fillings in front teeth...

Glossary
... Composite filling - Tooth colored restorations, also known as resin fillings...