Is it true that too much sugar in my diet is bad to my oral health?

Sure, But sticky forms of sugar, as in some candy are much worse than other types.
Yes. It's bad for your oral health as well as your general health.
Your general health. Too much of anything is not good. A necessary part of your diet, sugars can be problematic in even moderate amounts. Sugar specifically feeds bacteria that cause decay, gives you empty calories leaving you still hungry, causes spikes in your energy levels (think of kids the morning after halloween), and can be a factor in type ii diabetes. Measure, monitor, moderate and consult with your md & dds.
Yes. Eating large quantities of sugar provides a food source for the bacteria in your mouth that can cause cavities, gingivitis, and gum disease. It is also a great way to gain weight..