What type of supervision allows for the dentist's oversight only through video technology?

The correct answer is general supervision. This form of supervision allows a dental hygienist to perform procedures without the dentist being physically present in the office, as long as the dentist has previously authorized the procedures. General supervision includes oversight through alternative means, such as video technology, which enables the dentist to monitor the hygienist's actions without being on-site. This modality reflects a more modern approach to dental practices, leveraging technology to improve efficiency while still adhering to regulatory standards.

In contrast, direct supervision requires the dentist to be physically present in the office while the dental hygienist performs tasks, which does not align with oversight occurring solely through video technology. Indirect supervision implies that the dentist is not present in the office but must be available to assist if needed, which is different from the implications of general supervision. Observational supervision is not a recognized term in the context of dental practice regulations, making it irrelevant to this question.