Journal of Dental Research study: Fluoridation is not associated with increase in osteosarcoma

May 12, 2020

May 11, 2020, Alexandria, Va., USA--The Journal of Dental Research published today the results of a study that demonstrated that community water fluoridation is not associated with increased risk of osteosarcoma.

More than sixty percent of the U.S. population have access to community water fluoridation, considered to be one of the most important public health policies of the twentieth century due to its reduction of tooth decay at the population level. Fluoride ingestion has been suggested as a possible risk factor for osteosarcoma based on a 1990 animal study. Six of the seven subsequent case-control studies in humans reported that fluoride in drinking water was not associated with osteosarcoma.

This study assessed whether living in a fluoridated community was a risk factor for osteosarcoma by performing a secondary data analysis using data collected from two separate, but linked studies. Patients for both Phase 1 and Phase 2 were selected from U.S. hospitals using a hospital-based matched case-control study design. For both phases, cases were patients diagnosed with osteosarcoma and controls were patients diagnosed with other bone tumors or non-neoplastic conditions.

In Phase 1, cases (N=209) and controls (N=440) were patients of record in the participating orthopedic departments from 1989-1993. In Phase 2, cases (N=108) and controls (N=296) were incident patients who were identified and treated by orthopedic physicians from 1994-2000. This analysis included all patients who met eligibility criteria on whom we had complete data on covariates, exposures, and outcome. Conditional logistic regression was used to estimate odds ratios (OR) and 95% confidence intervals (CI) for the association of community water fluoridation with osteosarcoma.

The adjusted OR, for osteosarcoma and ever-having lived in a fluoridated area for non-bottled water drinkers was 0.51(0.31 - 0.84), p=0.008. The same comparison adjusted OR for bottled water drinkers was 1.86 (0.54 - 6.41), p=0.326.

"These results indicate that residence in a fluoridated community is not related to an increase in risk for osteosarcoma after adjusting for race, ethnicity, income, distance from the hospital, urban/rural living status, and drinking bottled water. This should not be surprising given that ingestion of fluoridated water is a common exposure and osteosarcoma remains a rare disease," said Chester Douglass; Harvard School of Dental Medicine, Department of Oral Health Policy and Epidemiology.
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View the complete paper at https://journals.sagepub.com/doi/full/10.1177/0022034520919385 or contact IADR at media@iadr.org.

About the Journal of Dental Research

The IADR/AADR Journal of Dental Research (JDR) is a multidisciplinary journal dedicated to the dissemination of new knowledge in all sciences relevant to dentistry and the oral cavity and associated structures in health and disease. The JDR continues to rank #1 of 90 journals in Eigenfactor with a score of 0.021290, ranks #2 in 2-year Impact Factor of 90 journals in the "Dentistry, Oral Surgery & Medicine" category at 5.125 and ranks #2 of 90 in Article Influence with a score of 1.643.The JDR's 5-year Impact Factor has remained above 5 for the fourth year at 5.722, ranking #2 of 91 journals. With over 20,000 citations, the JDR also boasts the most citations in the "Dentistry, Oral Surgery & Medicine" category -- 4,500 citations above the second ranked journal in the field.

International Association for Dental Research

The International Association for Dental Research (IADR) is a nonprofit organization with over 10,000 individual members worldwide, with a Mission to drive dental, oral and craniofacial research to advance health and well-being worldwide. To learn more, visit http://www.iadr.org. The American Association for Dental Research (AADR) is the largest Division of IADR with 3,100 members in the United States. To learn more, visit http://www.iadr.org/aadr.

International & American Associations for Dental Research

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