Written consent in dental records is required for which of the following?

Written consent in dental records is crucial for documenting services rendered as it serves to protect both the patient and the dental provider by ensuring that the patient is fully informed about the procedures they are consenting to. Obtaining written consent shows that the patient understands the treatment plan, associated risks, alternatives, and is in agreement with the intended services. This not only helps in fostering a trusting relationship between the dentist and the patient but also provides legal protection for both parties.

In contrast, while establishing office hours, defining payment plans, and collecting demographic information are important administrative tasks, they do not typically require a formal written consent from patients. These actions do not involve significant clinical procedures or potential risks that make written consent necessary. Thus, they do not necessitate the same level of patient involvement and documentation as the services rendered do.