Cal. Bus. & Prof. Code § 1917.3

Notwithstanding Section 135, an examinee for a registered dental hygienist license who either fails to pass the clinical examination required by Section 1917 after three attempts or fails to pass the clinical examination as a result of a single incidence of imposing gross trauma on a patient shall not be eligible for further reexamination until the examinee has successfully completed remedial education at an approved dental hygiene program or a comparable organization approved by the dental hygiene board.