I have had braces for about 3 years now and recently developed gingivitis. I am worried I have a cavity on my back molar. It hurts when I push on it. All my have been sensitive to cold and heat even before I had my braces, so I can't tell by that. I have not been able to have not had x-rays either. Is there anyway my dentist or orthodontist to be able to tell that far back? Also, my mouth is still the size of a child's and it is very hard to get into the back. I am very concerned, because I am waiting for my jaw surgery to be approved and then wait longer to realign my teeth after. Thank you.