California Code, Business and Professions Code - BPC § 1627.5

(a) A person licensed under this chapter, who in good faith renders emergency care at the scene of an emergency occurring outside the place of that person's practice, or who, upon the request of another person so licensed, renders emergency care to a person for a complication arising from prior care of another person so licensed, shall not be liable for any civil damages as a result of any acts or omissions by that person in rendering the emergency care.

(b) A person licensed under this chapter who voluntarily and without compensation or expectation of compensation, and consistent with the dental education and emergency training that the person has received, provides emergency medical care to a person during a state of emergency declared pursuant to a proclamation issued pursuant to Section 8588, 8625, or 8630 of the Government Code or a declaration of health emergency issued pursuant to Section 101080 of the Health and Safety Code shall not be liable in negligence for any personal injury, wrongful death, or property damage caused by the licensee's good faith but negligent act or omission.  This subdivision shall not provide immunity for acts or omissions of gross negligence or willful misconduct.  This subdivision does not limit any immunity provided under subdivision (a).

(c) Notwithstanding any other provision of law, for the duration of a declared state of emergency, pursuant to a proclamation of emergency issued pursuant to Section 8625 of the Government Code, the board may suspend compliance with any provision of this chapter or regulation adopted thereunder that would adversely affect a licensee's ability to provide emergency services.