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This is my updated EBD activity sheet including the process for searching for relevant systematic reviews.

I identified a few systemic reviews that could be potentially useful. The first is called 'Systematic review of water fluoridation' which I found during my search of medline using OVID. The second is 'water fluoridation for the prevention of caries" which I found during my search of the Cochrane library.

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Caroline EBD Activity Sheet - Version 2 EJ

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This has been a real struggle. I've spent a lot of time playing with the various search option on multiple databases but I have yet to manage to turn up a single relevant result, so I'm unsure where I am going wrong. I'm questioning whether my struggles are because 1) I'm fundamentally misunderstanding what I need to do or, 2) I'm looking for the wrong things in the wrong places or, 3) that the evidence for this question isn't really there EDIT: widening the question away from children, or away from caries specifically, makes this easier to find relevant material for, so I am questioning whether I should change this? I am also editing to confess that at the time I chose the question I had yet to look at (although I knew about) the PHE Inequalities in Oral Health Report, and certainly did not realise who the leading author was!

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1.MEDLINE via PubMed
2.The Cochrane Library
Both databases came up with the systemic review,
'Water fluoridation for the prevention of dental caries'.
On PubMed database there is
another review of interest 'Systemic review of water fluoridation'.

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I used medline and Cochrane for results and found these:

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I'm not sure for my Medline search whether I picked the correct article - it compares fissure sealant to varnishes and it's effectiveness my question is aimed at effectiveness of fissure sealants on treating tooth decay but it seemed most relevant in searches.

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I used Cochrane, and i think i got relevant result. I will be happy to read you comments.

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My focused search didn't yield what I'd hoped, but I guess that's the joy of these things :-)
I had hoped to find out if there was a difference between oral cancer rates in khat chewers and non-khat chewers amongst African immigrants to the UK. I couldn't find anything perfectly relevant to that, but did eventually find 3 systematic reviews around the subject (in Medline), so I'm going to stick with those for now. I expect a more detailed search might produce something better, but it might be that there is no research in this specific field (I suspect more likely).

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I used both Medline and Scopus as I wasn't sure where to look or what I would find. Thankfully both have provided loads of results.

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I hope my search strategy is accurate so please feel free to comment to help me improve it.

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I have attached my search strategy, however I do feel like I did something very wrong as my results do not seem too relevant.  I'm interested to read others strategies so that I can see how to improve this.