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Updated: Mar 20, 2026
Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
Published on: December 14, 2020
Oral pH in gastroesophageal reflux disease
S Sujatha1, Umesh Jalihal2, Yashoda Devi3
1Department of Oral Medicine and Radiology, M S Ramaiah Dental College and Hospital, MSRIT Post, M S R Nagar, Bengaluru, 560 054, India. s_sujathajanardhan@yahoo.com.
Aims And Objectives:
The aim of this study is to compare surface pH in various parts of the oral cavity between patients with gastroesophageal reflux disease (GERD) and healthy controls.
Methods:
Using a flat pH meter sensor, fixed electrode pen type digital pH meter, oral pH levels were assessed at different mucosal sites among 34 GERD patients and 32 healthy controls. Salivary flow rates and buffering capacity were also assessed in them. A thorough oral examination was performed to screen for any oral and dental changes.
Result:
A significantly lower pH of 6.65 ± 0.13 (mean ± SD) was found in the GERD group compared to control group 7.23 ± 0.12 (p < 0.05). Least pH was found in the floor of the mouth 6.594 ± 0.17 and highest in the lower labial mucosa among the GERD patients. Salivary flow rate and buffering capacity were low in these patients. Significant changes were noticed in the hard and soft tissues of the oral cavity among the GERD group.
Conclusion:
Oral mucosal pH is altered in GERD patients and may contribute to effects on the oral cavity.
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