Oh yeah! It's caused by both and you might want to question if you have a zinc defincentcy (spelling)? Sorry, to much percocet tonight from infected/impacted wisdom teeth. All root canals I've ever had have failed within 2 years because my gums can't support the dental work and decay takes over. No matter how much flossing/brushing/rinsing etc. I do. However, do these things and make you natural teeth last as long as you can. I am 47 and now wear a total denture on top. I will admit that economic circumstances growing up prohibited me from receiving proper dental care.
Dx'd Jan'06, 1st Resection 7/06, Predinsone, Humira, Imuran, B12 injections, Nexium. Secondary conditions: Psorasis, Acne, Fatigue, Joint Pain, Lactose Intolerant, gallstones, fibroid cysts, peri-menopausal.