Once you have found systematic reviews or clinical research articles related to your question you must critically evaluate the research and how it is reported. Even a Cochrane systematic review should be read critically!
Critical appraisal is the process of reading research papers with an focus on:
Appraisal tools can guide you through the process of critically reading an article.
The Journal of the American Dental Association (JADA) published a series of short commentaries explaining evidence-based dentistry concepts and detailing how to incorporate it into practice. Click on the links below for full-text access (UNC Chapel Hill affiliates only).
A Practical Approach to Evidence-Based Dentistry : Articles I-X