Under what condition can no further dental information be added once entered?

The condition under which no further dental information can be added once entered is when ALL is entered in the DCH field. This indicates that the dental information provided is comprehensive and covers all necessary details related to the individual's dental history. By marking the DCH field as ALL, users signal that the information has been fully documented, thereby preventing any additional data from being recorded. This practice ensures clarity and accuracy in the records, as it eliminates the potential for confusion or conflicting information about the individual's dental profile.

In contrast, the other scenarios mentioned would typically still allow for updates or changes. For instance, finding a missing person or canceling a missing report usually involves new circumstances, which might necessitate revisiting and updating previously recorded information. Partial dental history implies that there is still room for additional data to be added, as it does not represent a complete set of information. Thus, ALL being entered in the DCH field stands out as the definitive condition for restricting further entries.