The main purpose was to study the effectiveness of audit and feedback on oral health performance in
qualified Well Child Clinic (WCC) with full time dental nurse at Sub-district Health Promoting Hospital. This study
was a double blind randomized controlled trial. The samples consisted of 14 dental nurses who worked at Sub-district
Health Promoting Hospital (7 in control and 7 in intervention groups). Seven hundred and fifty two children and
their guardians were included (372 pairs in control and 380 pairs in intervention groups). The intervention group
received audit and feedback both at group level and confidential individual level. The tailor-made solving problem
plan was developed after feedback. The dental nurses’ performance evaluated by chart auditing for the coverage
and the accuracy of caries risk assessment. The outcome evaluation was oral health care behavior of guardians and
oral cleanliness. Structure questionnaire interviewing among guardians was used for oral health care behavior.
Dental examination was conducted for oral cleanliness. The evaluation was implemented two times; at baseline
and 6 months after intervention. The mean ages at baseline of children among control and intervention groups
were 22.4±7.8 and 20.8±6.6 months, respectively. At 6 months after intervention, the number of existing children
were 642 (85.4 %) with mean age 27.5±7.1 months and 26.8±6.4 months among control and intervention groups,
respectively. There were statistically significance between both groups in the coverage and the accuracy of caries
risk assessment by dental nurses, oral health care behavior and oral cleanliness of guardian and their children. In
conclusion, audit and feedback improved the dental nurses’ performance, parental oral health care behavior and
children oral cleanliness.