WHO Expert Group on Equipment and Materials for Oral CareWorld Health Organization. Oral Health Unit2012-06-162012-06-1619901990-12-31WHO/ORH/EGEMOC/CPITN/1990. Unpublishedhttps://iris.who.int/handle/10665/58414ONLINEWHO/ORH/EGEMOC/CPITN/1990. Unpublished10 p.enPeriodontal DiseasesPeriodontal IndexDental InstrumentsOral and Dental HealthThe periodontal probe for use with the community periodontal index of treatment needs (CPITNdiagnosis