A low serum Ca/Mg ratio was significantly associated with periodontal disease progression in Japanese elderly smokers.
Journal of clinical periodontology
Department of Oral Health Science, Division of Preventive Dentistry, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan. akihiro [at] dent.niigata-u.ac.jp
J Clin Periodontol. 2011 Nov;38(11):992-7
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