The Off-Site Dentist and the Fractured Cusp
A 34-year-old patient arrives at a general dental office at 11:40 a.m. with a fractured cusp on tooth #30; the cusp is sharp but the tooth is not mobile, and the patient reports mild pain on biting. The dentist is at a lunch meeting 20 minutes away and will return in 90 minutes. A newly hired dental assistant, certified but not an expanded function dental assistant (EFDA), is asked by the office manager to “smooth the sharp edge and place a temporary filling” so the patient can leave. The dentist signed a standing order last month authorizing assistants to place temporary restorations “when needed.” The patient takes warfarin (INR 2.8), has mitral valve prolapse, and is allergic to penicillin. The assistant has never placed a temporary restoration and has no formal training in restorative functions. The office manager says the standing order makes it legal and that the patient signed a general consent.
1. May the dental assistant smooth the cusp and place a temporary filling under Oregon law? Identify the scope-of-practice and supervision issues.
Read the worked answer
No. Oregon’s Dental Practice Act and Board rules allow a dentist to delegate only tasks that fall within the auxiliary’s authorized scope and that the auxiliary is trained and competent to perform. A basic certified dental assistant is not an EFDA, and restorative functions such as placing a temporary restoration are expanded functions, not basic assistant duties. A standing order cannot enlarge the assistant’s statutory scope; it can only authorize tasks the assistant is already legally permitted to perform. The assistant has never been trained in the procedure, so even an otherwise delegable task would fail the competence requirement. Supervision is a separate problem: with the dentist 20 minutes away, the office cannot satisfy direct supervision, which requires the dentist to be on the premises and available. A general consent signed by the patient does not cure the scope defect. If the assistant proceeded, the assistant could be found to have practiced outside authorized duties, and the dentist could face discipline for improper delegation.
2. What should the assistant do in the moment, and what should the dentist have done before leaving?
Read the worked answer
The assistant should decline the restorative task, explain to the patient that the dentist needs to evaluate the tooth, and contact the dentist or schedule an urgent return visit. The assistant may perform only tasks within her basic scope and training - for example, taking a focused history, obtaining radiographs if authorized, or providing post-operative instructions - but should not attempt to smooth the cusp with a rotary instrument or place temporary material. The dentist should have arranged on-site coverage, returned to the office, or scheduled the patient when an appropriately trained EFDA and the dentist were both present. If the dentist wanted temporary restorations delegated, the office needed a current EFDA with documented training, a prior examination, and direct supervision. A standing order is not a substitute for patient-specific authorization and supervision.
3. Would the analysis change if the dentist were in another operatory and the assistant were an EFDA with a current certificate?
Read the worked answer
It could change, but not automatically. If the EFDA’s certificate is current, the task is within EFDA scope under Oregon rules, and the EFDA has documented training in temporary restorations, the dentist may delegate it under direct supervision. The dentist in another operatory can satisfy direct supervision if the dentist has examined the patient, authorized the procedure, remains on the premises, and is available to intervene. The dentist would still need to consider the patient’s warfarin use, INR, mitral valve prolapse, and penicillin allergy in planning care. If any element is missing - expired EFDA certificate, no training, no prior exam, or dentist off-site - the answer remains no. The key is that supervision level and scope are separate gates; passing one does not excuse failing the other.