Aims To investigate dental attendance of patients in different age groups after dental general analgesia (DGA) and procedures performed on these patients during the DGA and in dental care after the DGA during the follow-up period of almost 3 years. Methods The study population consisted of 66 patients who were treated under DGA at a municipal health centre in Oulu, Finland between September 2010 and June 2011. The electronic patient files of the DGA patients were accessible for data collection for the follow-up period of nearly 3 years. The statistical analyses included Chi square tests and logistic regression modelling. Results Approximately every sixth (14.9%) dental visit was missed or cancelled and nearly half (43.9%) of the studied subjects had at least one missed or cancelled appointment. The factors increasing the risk of missed or cancelled appointments and dental avoidance were endodontic treatment (OR 3.62), need of more than five dental restorations (OR 3.47), tooth extractions due to caries (OR 2.22), and male gender (OR 1.80). A total of 45.5% of the patients received non-invasive procedures. Conclusions Patients who need DGA are evidently risk patients considering dental attendance. Nearly half of the patients in this study had non-attended or cancelled appointments. DGA patients' need of treatment after DGA is extensive, even comparable to the amount of procedures generally performed under DGA. The quality or amount of preventive procedures do not appear to be at the required level to reduce the number of non-attended appointments.