Clinical Research Directory

Inclusion Criteria: * Patients aged 18 and above * Have a valid mobile phone number that can receive WhatsApp messages, recorded in the hospital network's patient database * Attended a non-dental medical appointment the day before the intended contact day OR have a non-dental medical appointment within the week after the intended contact day * Have not been contacted in the past two months about preventive dental checkups * Have not attended a dental appointment at the hospital network in the past 6 months Note: The partnering clinic agreed to run the study until a concurrent experiment registered at NCT07121673 is finished. The investigators aim to reach 100,000 patients by then, but the final sample size will vary depending on the actual outreach efforts by the end of the study period.