Abstract: Patient safety practices in the Out-Patient Department (OPD) of oral health care clinics are not adequately in place in the public health care delivery system in Sri Lanka due to a lack of understating of patient safety practices in dentistry. Further, the low quality of record-keeping may imply the underestimation of patient safety in oral health care treatment. The present study was carried out as an interventional research project to improve patient safety practices in the OPD of oral health care clinics under the Regional Director of Health Services in Badulla District (RDHS-Badulla District).