The Cochrane Collaboration

An international, not-for-profit, independent organisation that provides up-to-date healthcare information.Over 90 international review groups produce systematic reviews of healthcare interventions.Over 2,000 current systematic reviews that answer clinical questions about the effectiveness of treatments. 
To learn more about the Cochrane Collaboration and view the abstract, visit www.cochrane.org 

2011 Cochrane Review

Power vs. Power Systematic Review 2011 Results “The review included data from 17 trials with 1369 participants.There is evidence from seven trials of up to three months and at unclear/high risk of bias that rotation oscillation brushes reduce plaque (SMD 0.24; 95% CI 95% 0.02, 0.46) and gingivitis (SMD 0.35; 95% CI -0.04, 0.74) more than side to side brushes. Due to the dearth of trials, no other definitive conclusions can be stated regarding the superiority of one mode of powered toothbrush over any other. Only minor and transient side effects were reported.”

Deacon SA, Glenny AM, Deery C, Robinson PG, Heanue M, Walmsley AD,
Shaw WC, The Cochrane Library 2011, Issue 6

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