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 21 June 2018

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News

Gum chewing increases both pharyngeal and esophageal pH

Gum chewing is a useful adjunctive antireflux therapy for patients with laryngopharyngeal reflux, claim investigators from Winston-Salem, North Carolina, USA.

News image

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The team investigated the effects of gum chewing on pharyngeal and esophageal pH in patients with laryngopharyngeal reflux (LPR).

They reported their findings in the December issue of the Annals of Otology, Rhinology and Laryngology.

A total of 40 consecutive, unselected, adult patients, who were undergoing ambulatory double-probe (simultaneous pharyngeal and esophageal) pH monitoring for diagnosis of LPR, were enrolled into the trial.

All were asked to chew 2 sticks of gum 4 times during their pH studies.

Twenty subjects chewed regular sugarless gum, and 20 subjects chewed a sugarless gum containing bicarbonate.

Bicarbonate gum increases esophageal and pharyngeal pH the most.
Annals of Otology, Rhinology & Laryngology

The subjects recorded the beginning and end of each gum-chewing period.

The mean pH values for the gum-chewing intervals, and for comparable pre-gum-chewing intervals, were analyzed statistically for both the pharyngeal and esophageal probe data.

The regular gum group and the bicarbonate gum group were analyzed separately.

In addition, the gum-chewing pH data were compared to controls (i.e. normal postcibal buffering effects).

The data show that gum chewing consistently increases esophageal and pharyngeal pH, and that bicarbonate gum causes greater increases than regular gum.

Author Benjamin R. Smoak concluded on behalf of the group, "For patients with LPR, gum chewing appears to be a useful adjunctive antireflux therapy."

Ann Otol Rhinol Laryngol 2001: 1117-19
27 November 2001

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