- The ethical principle breached when dental records are shared without proper authorization is Confidentiality.
- This principle requires healthcare professionals to protect patient information from unauthorized access, ensuring privacy is maintained.
- Sharing records without consent undermines patient trust and violates legal and professional standards.
- Autonomy, beneficence, and justice relate to patient self-governance, doing good, and fairness, but do not directly address unauthorized information disclosure.

Reference: Essentials of Dental Ethics and Law, Volume 1, Chapter 3, Page 45