Gastroesophageal reflux disease (GERD) is a common digestive disorder that affects millions of people worldwide. Reflux of gastric acid may cause oral acidification that can induce teeth demineralization. Destruction of dental hard tissue by acid reflux necessitates a combine approach involving medical and dental profession. This pilot study aims to assess associationbetween enamel erosion and GERD, and estimate prevalence of enamel erosion among GERD patients. A total of 22 patients (GERD and control) were involved in this case-control study. Dental charting was done using five-point ordinal scales of modified Tooth Wear Evaluation System (TWES 2.0). Cohen’s Kappa Coefficient was used for assessment of intra-rater and inter-rater reliability. Fisher’s Exact Test was used to determine association between enamel erosion and GERD, reflecting prevalence. Out of 11 GERD patients, 63.6% exhibit enamel erosion, whereas only 9.1% ofcontrol patient presented with enamel erosion. Fisher’s Exact Test showed a significant prevalence of enamel erosion in GERD patients (p=0.024).This study showeda clear association between enamelerosion and GERD, and it can be considered as an oral manifestation in patient with GERD. Future study involving large sample size is recommended to show clear statistical evidence ofassociation betweenenamel erosion and GERD.

Natural products have demonstrated various activities beneficial to general health. Flaxseed (Linum usitatissimum) has been reported in many studies for its antimicrobial, antioxidant, and anti-inflammatory effects. Additionally, flaxseed extracts have skin wound healing activity and potential for treating oral ulcers. L. usitatissimum was extracted using 70% ethanol via soxhlet method and gas chromatography mass spectrum (GCMS) was used to analyze the components of L. usitatissimum extract. The crude flaxseed oil were applied to human oral fibroblasts (HOrF), and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay was used to assess the cell viability after 24, 48 and 72 hours. Scratched HOrF cells were treated with crude flaxseed oil and healing was monitored per wound healing assay. GC-MS indicate that the major components present in L. usitatissimum oil extract are linolic, palmitic and oleic acid. L. usitatissimum crude oil extract showed high proliferation effect on HOrF cells at 24 and 48 hours, while the highest proliferation effect was recorded at 72 hours post-treatment. The wound healing assay results showed that healing activity of HOrF cells occurred as soon as 18 hours post-treatment when treated with L. usitatissimum crude oil extract. L. usitatissimum crude oil extract has proliferating and healing effects on HOrF cell line. Therefore, it can be considered as a potential promising oral wound healing agent.