Integrated Dentistry I Third Year

1. Searching for evidence

2. Objectives
• Traditional sources of evidence
• EBP sources of evidence

3. Sources of evidence
• A single study vs body of evidence
• Bias in sources
• Traditional sources:
Textbooks
Personal journal collections
Conference proceedings
Clinical guidelines
Colleagues, mentors, experts
‫ﻣﺮﺷﺪﻳﻦ‬

4. Sources of Evidence
• Primary
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– Original papers published in peer reviewed
journals
• Secondary
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– Synthesized publications of primary research
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literature that meet prespecified criteria of both
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clinical relevance and methodologic quality
– Systematic reviews, meta analysis & EB clinical
practice guidelines

5. Sources of Evidence
• Primary
– Pubmed (MEDLINE)
– EviDents (evidents.org)
• Secondary
– ADS Center for Evidence-based Dentistry (Ebd.ada.org)
– EBD journal (Nature.com/ebd)
– Oral health evidence-based practice program, Univ. of Texas
Health Sciences Center (cats.uthscsa.edu)
– The Cochrane Library (thecochranelibrary.org)
– TRIP database (tripdatabase.com)
– The Dental Elf (thedentalelf.net)
– Guidelines

6. Sources of Evidence
• Primary
– Pubmed (MEDLINE)

Text word searching

Medical Subject Heading (MeSH) i.e., Thesaurus
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
Clinical queries
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
Bolean Operators: AND, OR, NOT

9. LIMITS

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19. AND
A
A
&
B
OR
A
B
NOT
A
B
B

20. Boolean operator AND combines only
sets that contain both terms
Tooth
paste
Tooth
bleaching
Tooth paste AND Tooth bleaching

21. Boolean operator OR combines sets that
contain at least one of the terms
Tooth
paste
Tooth
bleaching
Tooth paste OR tooth bleaching

22. Boolean operator NOT excludes sets that contain
the stated term even when it includes both terms
Tooth
paste
Tooth
bleaching
Tooth paste NOT Tooth bleaching

23. Structured approach to database searching
• Formulate a clear question
• Identify the type of question
3*CF
• Identify alternate terms related to PICO question (synonyms
for P, I, C, O)
• Identify MeSH terms for the PICO (use the MeSH browser)
• List the inclusion criteria limits
Language
Human subject
Age
Gender
Publication type, beginning with the highest level of
evidence (e.g. systematic review)

24. Structured approach to database searching
• Run search:
Search each concept separately
Combine retrieval with Boolean operators
• Evaluate retrieval and modify search strategy, if
necessary
• Review the citations and abstracts ( the
methodology often is included in the abstract)
• Select citations that appear to address the
question
• Access the related full-text articles or order
them
‫ﺍاﻟﻌﻮﺍاﻣﻞ ﺍاﻟﻤﻨﻄﻘﻴﯿﺔ‬
‫ﺍاﻻﺳﺘﺸﻬﮭﮫﺎﺩدﺍاﺕت‬

26. Search for Evidence
• Sources of evidence
– MEDLINE
– When performing a search we should a combination of
• Text word searching
• Medical Subject Heading (MeSH) i.e., Thesaurus
Do •children with deciduous teeth who consume
Clinical queries
xylitol chewing gum, compared to children who
• Bolean Operators: AND, OR, NOT
don’t, have lower incidence of dental caries?
SBARD Intro to EBD 09 by Dr. Asim Al-Ansari

27. SBARD Intro to EBD 09 by Dr. Asim Al-Ansari

28. SBARD Intro to EBD 09 by Dr. Asim Al-Ansari

29. Sources of Evidence
• Secondary
– Evidence-based Journals

30. Sources of Evidence
• Secondary
– Evidence-based Journals

31. Sources of Evidence
• Secondary
– Evidence-based Journals

32. Evidence Based Dentistry

33. Evidence Based Dentistry

34. Evidence Based Dentistry

35. Evidence Based Dentistry

36. Evidence Based Dentistry

37. Evidence Based Dentistry

38. Sources of Evidence
• Secondary
– Evidence-based Journals
– The Cochrane Library

40. Tooth whitening

41. Sources of Evidence
• Secondary
– Evidence-based Journals
– The Cochrane Library
– The TRIP Database

42. Sources of Evidence

43. In adult patient, does home bleaching compared to
office bleaching improve tooth whitening

44. In adult patient, does home bleaching compared
to office bleaching improve tooth whitening