Table 1 List of websites included in searching for CPGs

National Institute for Clinical Evidence (NICE)

https://www.nice.org.uk/

Scottish Intercollegiate Guidelines Network (SIGN)

https://www.sign.ac.uk/

California Dental Association (CDA)

https://www.cda.org/

American Dental Association (ADA)

https://www.ada.org/

Public Health England (PHE)

https://www.gov.uk/government/organisations/public-health-england

NHS Health Scotland

http://www.healthscotland.scot/

ICDAS Foundation

https://www.iccms-web.com/

World dental federation (FDI)

https://www.fdiworlddental.org/

Scottish Dental Clinical Effectiveness Program (SDCEP)

https://www.sdcep.org.uk/

Guidelines International Network (GIN)

https://g-i-n.net/

National Health and Medical Research Council (NHMRC)

https://www.nhmrc.gov.au/

The Alliance for the Implementation of Clinical Practice Guidelines (AiCPG)

https://aicpg.org/

New Zealand Guidelines Group

https://www.health.govt.nz/about-ministry/ministry-health-websites/new-zealand-guidelines-group

General Dental Council (GDC)

https://www.gdc-uk.org/

UK guidelines

https://www.guidelines.co.uk/

Iranian Dental Association (IDA)

https://www.ida-dent.org/

Iranian General Dentists Association (IGDA)

http://en.igda.ir/

Islamic republic of Iran ministry of health and medical education (MHME)

https://behdasht.gov.ir/

Tehran University of Medical Sciences

https://tums.ac.ir/

Iran University of Medical Sciences

https://iums.ac.ir/

Shahid Beheshti university of medical sciences

https://sbmu.ac.ir/

Tabriz University of Medical Sciences

https://www.tbzmed.ac.ir/

Isfahan University of Medical Sciences

https://mui.ac.ir/fa

PubMed

https://pubmed.ncbi.nlm.nih.gov/

Google

https://www.google.com/

Google scholar

https://0-scholar-google-com.brum.beds.ac.uk/

Trip data base

https://www.tripdatabase.com/

Scientific Information Database

https://www.sid.ir/