In Vivo Quantification of Dental Demineralisation Using OCT With and Without Esomeprazole

Inclusion Criteria: 1. Dental erosions with Lussi score greater than 1, diagnosed by dentist 2. Provision of informed consent 3. Male or female aged 18 or above years 4. GORD defined by time with pH\<4 greater than 3.5% during 24 hours demonstrated by 24h-hour pH-metry in the last 6 months before the start of the study Exclusion Criteria: 1. Significant illness within 2 weeks of study begin as judged by investigator. 2. Established or suspected non-reflux causes for dental erosions. 3. Inadequate exclusion of other causes for dental erosions (diet, psychiatric, bruxism, salivary abnormalities, vomiting, etc). 4. Inability or unwillingness to give informed consent. 5. Inability to attend all study. 6. New dental treatment (including dental products) may not be begun from 2 weeks before study begin until the end of the study, except usual dental hygiene with usual toothpaste. 7. Allergy to or other contraindication for treatment with esomeprazole. 8. Use of proton pump inhibitors in 2 weeks or other acid inhibitory drugs in 3 days before study inclusion. 9. Substantial change or planned change in dietary pattern, esp. diets within 2 weeks of study start and for the duration of the entire study. 10. Change or planned change in normal medication or use of herbal, mineral, vitamin preparations within 2 weeks of study start and until the end of the study. 11. Congenital dental defects. 12. Ongoing pregnancy or breast-feeding.