Billerica Dental Associates did work on a permanent bridge that I HAD! In short. I had some decay with the bridge.The dentist Dr Khan said he could repair it by having his oral surgeon do some lengthening repair work and the dentist would finish it up.Well after they did most of the work toward the end the whole story changed and became VERY misleading.The work they did was expensive and when I called the front desk days later and told them I would not be coming back their office manager asked why.I explained how I was mislead and she gave me a really stupid reason to explain why I was not.I even discussed this with others and they said "That makes no sence!".I then started going to Tufts Dental School for the work.Three different doctors at different times came in,looked at the tooth that was worked on by Billerca Dental Asso.,(that held thhe bridge in)and said "Pull IT".one doctor said" those people waisted your time and your money!".Beware!!! I gave them one star too many.