Virtual perio-clinic

Oral Hygiene Indices and Periodontal Screening and Recording (PSR)


Oral Hygiene Indices and Periodontal Screening and Recording (PSR)

You’re assessing your patient’s oral hygiene by using Approximal Plaque Index (API) and Sulcus Bleeding Index (SBI).

While assessing dentition you noticed that your patient is missing all wisdom teeth. On testing tooth 17 showed slight mobility. Identify other missing teeth in the image and answer the following questions.



    Your have not achieved a satisfactory score, please go back to the following links:

    WHO Probe/PSR


    #1. How many reading points does your patient have?

    #2. After sweeping the WHO probe through the gingival sulci you identified 3 bleeding sites. What is your patient’s SBI score (%)?

    #3. After applying disclosing agent to your patient’s teeth, you identified 18 sites with biofilm deposits. What is your patient’s API score (%)?

    #4. Complete the missing PSR codes shown as question marks in the box chart above. The WHO probe is showing sites with the greatest probing depth in sextants 1, 3, 4 & 6.

    #5. Which statement below is correct regarding (Periodontal Screening Recording) PSR?

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