How to add new citation styles to Zotero

1. pick your citation style (right click "Save as") from the Zotero Style Repository and download. 

You will see a file with .csl extension

2. In Zotero, go to Edit > Options > Cite > Styles > + and add the file csl

Done :)

You can download all the styles of major dental journals in a zipped file here :) or create a new style with this instructions or this