After 3 rrot canals .I had to have surgery where the specialst cleaned bone and took stitches. 2 weeks after i started with foamy spit , went to the dentist and shesaid everything was ok . Then went to the doctor had ablood test in which I came positive to lactobacter prylori . Antibiotics treatment,protonix and nexium . Continued with same foamy spit got an indoscopy test came out again with same bacteria , severe gastritis and a small hernia in esphogus.More antibiotics ,nexium , carafate . Still same symptoms , burning in throat and stomach and now the gastrointerologists is going to get me the test 24 hr Ph monitoring because doctor thinks its not stomacxh related because the medication isn't helping.