Under the supervision of the Supervising Dentist or designee, the Dentist is the clinical leader of the Dental Assistant. Services provided must be based on dental necessity and effective to protect life, prevent significant illness or disability, or alleviate severe pain that significantly disables the patient from reasonable independent function. Facility shall defer services if the healthcare service is non-essential or could safely be deferred until the inmate/patient is released from custody, when he/she is able to arrange for services for him/her. Vendor shall ensure that all ordered dental services and proposed surgical procedures shall be scheduled consistent with the severity of the dental need. Once scheduled, services shall be delivered at the time scheduled, unless unavoidable circumstances occur.