The relationship between a dentist and his patient is based on trust. The principle of informed consent contributes to the quality of that relationship of trust. According to the professional standards for such a relationship, it is up to the dentist to make sure that the patient is well informed. Reliable information is necessary if the patient is to be in a position to give his or her consent for treatment. The Dutch Law of agreement to Medical Treatment (WGBO) provides a framework for informed consent. Disciplinary judges establish the scope and if necessary the limits. It is clear that, among other things, not defining the risks beforehand can be the basis for a (disciplinary) complaint. Determining the requirements of informed consent calls for familiarity with the law and communication skills. Programmes in dental education ought to devote more attention to this issue.