A wooden
interdental cleaner is inserted between the teeth from the facial aspect, depressing the
interdental tissues 1 to 2 mm. This is repeated four times and the presence or absence of
bleeding within 15 s is recorded. Considering the over-all high levels of reliability between
and within examiners, this method would be suitable for use in clinical trials and
epidemiological studies (Blieden et al., 1992).
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