Dentine hypersensitivity is a troublesome condition that results in sharp sudden burst of pain in response to thermal stimuli such as hot or cold foods, but may also arise from tactile stimuli such as use of a toothbrush. Prevalence of the condition has been reported as high as 74% in some studies.
This 2011 review by Cunha-Cruz et al which addressed the question; Do oxalates reduce dentine hypersensitivity? has just had a critical summary prepared under the auspices of the American Dental Association Center for Evidence-Based Dentistry, published in the Journal of the American Dental Association.
The appraiser noted that the reviewers had conducted an exhaustive search but only a small number of studies (12) were found. He notes that the reviewers were also hampered by a lack of a gold standard for measuring dentine hypersensitivity and variation in follow up times. This together with variations in studies designs meant that there was substantial heterogeneity between the included studies.
Cunha-Cruz J, Stout JR, Heaton LJ, Wataha JC; Northwest PRECEDENT. Dentin hypersensitivity and oxalates: a systematic review. J Dent Res. 2011 Mar;90(3):304-10.
Poulsen S, Errboe M, Lescay Mevil Y, Glenny AM. Potassium containing toothpastes for dentine hypersensitivity. Cochrane Database of Systematic Reviews 2006, Issue 3. Art. No.: CD001476. DOI: 10.1002/14651858.CD001476.pub2.