DENTHYG 2220

When searching the literature, you want to make sure you are searching for all the possible variations and different words that could be used to describe your topic.  For example, using both the terms cavities and dental caries.

Synonyms are an important part of developing a thorough search strategy.

Each database will have its own special set of terms or subject headings that the indexers use to describe articles.  When developing your search strategy, it is always a good idea to take a look at the subject headings for that database to ensure you are using the official term, as well as to get ideas for synonyms or alternative search terms to use.  Below are descriptions of some of the commonly used subject headings.

In addition to searching with subject headings, you want to also include any synonym or similar keywords in your search.  This is important to catch any results that may have been indexed with a different subject heading.  In some databases, it will also help catch results that may not have been fully indexed yet (this is especially important in PubMed).

The databases will often not understand your query if you enter it as a natural language sentence, such as your full research or PICO question.  Instead, you want to use the search terms that you brainstormed to create an advanced search strategy.  By using Boolean Operators, you can tell the databases precisely how you want your search terms to be searched. 

AND Limits your search to articles that contain both of the search terms Narrows or focuses your search; you will typically get fewer results the more ANDs you use Use AND between different concepts For example: dental anxiety AND music therapy
OR Expands your search to articles that contain either of the search terms Broadens your search; you will typically get more results the more ORs you use Use OR between different search terms for the same concept For example: dental anxiety OR dental fear OR dental phobia
NOT Excludes a term from your search Narrows or focuses your search; you will typically get fewer results the more NOTs you use For example: music therapy NOT art therapy BE CAREFUL!  It is very easy to exclude too much and accidentally miss important and relevant literature. Try to use combinations of AND and OR, then exclude results yourself, instead of using the Boolean NOT

Lastly, when creating a more complicated or advanced search, you can use parentheses to group your keywords together and tell the database precisely how you want the terms searched.  The database will perform the searches within parentheses before the searches outside of parentheses.  This is similar to the way parentheses are used in math.

Use parentheses any time you have more than one keyword for a particular concept.  In other words, when you are using the boolean operator OR, put parentheses around all of the OR'd terms.

For example: (dental anxiety OR dental fear OR dental phobia) AND (music therapy OR music)