In Texas, dental assistants are not allowed to do anything that meets the statutory definition of practicing dentistry unless a licensed dentist has specifically delegated the task and the assistant holds any registration the task requires. That definition, in Texas Occupations Code Section 251.003, sweeps in diagnosing oral conditions, prescribing treatment, cleaning and scaling teeth, administering anesthesia, performing procedures, and fitting or adjusting appliances.1State of Texas. Texas Occupations Code Section 251.003 If a task isn’t on the short list of duties a dentist may delegate under 22 TAC Section 114.1, an assistant cannot perform it, no matter how routine it seems.2Legal Information Institute. Texas Administrative Code 22 TAC 114.1 – Permitted Duties
Diagnosing Conditions or Reading X-Rays
Assistants cannot tell patients what is wrong with their teeth. Diagnosing diseases, injuries, or defects of the teeth, gums, and jaws is part of the statutory practice of dentistry, so only the dentist can examine findings and identify problems.1State of Texas. Texas Occupations Code Section 251.003
X-rays are the usual confusion point. An assistant with a dental assistant radiology certificate from the Texas State Board of Dental Examiners can position and expose radiographs.3Legal Information Institute. Texas Administrative Code 22 TAC 114.2 – Registration of Dental Assistants That certificate does not authorize reading them, pointing out cavities or fractures on the image, or explaining what the film shows. When a patient asks what they’re looking at, the answer has to come from the dentist. New hires without the certificate get a one-year grace period to take x-rays while working toward it.4State of Texas. Texas Occupations Code Section 265.001 – Registration Required for Certain Dental Acts
Administering Anesthesia or Sedation
Injecting local anesthetic, starting an IV line for sedation, or initiating nitrous oxide are all prohibited. These acts are practicing dentistry, and even licensed dentists need separate TSBDE sedation permits to administer moderate or deep sedation, with additional authorization for high-risk or pediatric patients.5Texas State Board of Dental Examiners. Sedation of High-Risk and Pediatric Patients There is no equivalent permit an assistant can hold.
One narrow exception exists. After the dentist starts nitrous oxide, an assistant with a nitrous oxide monitoring registration, current dental assistant registration, BLS certification, and the required board-approved training may monitor the patient under the dentist’s direct supervision.6Legal Information Institute. Texas Administrative Code 22 TAC 114.4 – Monitoring the Administration of Nitrous Oxide Even then, the assistant only observes and reports. Starting, adjusting, or stopping the flow is not permitted.
Prescribing or Adjusting Medications
Assistants cannot prescribe medications, dispense them, or advise patients on dosages or substitutions. Prescribing treatment for conditions of the teeth, gums, and jaws is part of the statutory practice of dentistry, and only a licensed dentist can make those calls.1State of Texas. Texas Occupations Code Section 251.003
The bar covers more than writing prescriptions. Telling a patient to double a pain reliever, suggesting an alternative antibiotic, or approving a change in how a drug is taken all fall on the wrong side of the line. Medication questions belong with the dentist.
Performing Any Irreversible Procedure
Anything that permanently changes teeth or oral tissue is off-limits. Extractions, fillings, crown placements, root canals, decay removal, and reshaping enamel are all statutory practice of dentistry.1State of Texas. Texas Occupations Code Section 251.003 Assistants can prepare materials, set up trays, and pass instruments, but cannot cut, drill, place, or remove.
Two tasks that look like exceptions are actually carefully bounded. A qualified assistant may apply pit and fissure sealants with the required experience, BLS certification, and board-approved training.7Legal Information Institute. Texas Administrative Code 22 TAC 114.3 – Pit and Fissure Sealant A qualified assistant may also perform coronal polishing — removing plaque and surface stains with a rubber cup and polishing agent — under direct supervision after completing accredited training.8Legal Information Institute. Texas Administrative Code 22 TAC 114.5 – Coronal Polishing Both are drawn so they do not permanently alter tooth structure.
Adjusting Orthodontic Appliances
Assistants cannot tighten wires, reposition brackets, or otherwise adjust braces and retainers. Fitting, adjusting, and repairing dental appliances in the mouth is on the statutory list of dental practice.1State of Texas. Texas Occupations Code Section 251.003 Small changes affect tooth movement, so those decisions stay with the dentist or orthodontist.
Support tasks are fine. Preparing materials, teaching a patient how to clean around brackets, and polishing tooth surfaces with a rubber prophy cup before bonding are within scope.7Legal Information Institute. Texas Administrative Code 22 TAC 114.3 – Pit and Fissure Sealant A broken bracket or a poking wire gets referred to the dentist rather than fixed at the chair.
Scaling, Prophylaxis, and Other Hygienist-Only Work
A whole tier of clinical work belongs to licensed dental hygienists, not assistants. Removing accumulated matter, tartar, deposits, and stains from teeth is part of the statutory practice of dental hygiene. An assistant who performs a full prophylaxis or scales below the gumline isn’t just working outside their scope — they’re practicing dental hygiene without a license.
Coronal polishing is where the confusion usually starts. A qualified assistant can polish the visible surfaces of teeth to remove plaque and surface stains.8Legal Information Institute. Texas Administrative Code 22 TAC 114.5 – Coronal Polishing Subgingival scaling, root planing, and the deeper cleaning a hygienist performs are all outside that authority. Crossing this line is one of the more common violations the board sees.
Permitted Tasks Done at the Wrong Supervision Level
A task can be delegable and still unlawful if the supervision is wrong. Texas recognizes two levels. Direct supervision requires the dentist to be physically present in the office, though not necessarily in the room. General supervision allows the dentist to be off-site while remaining responsible for the work.2Legal Information Institute. Texas Administrative Code 22 TAC 114.1 – Permitted Duties
Under general supervision, assistants may do only two clinical things: take dental x-rays with the proper radiology certificate, and provide interim treatment for a minor emergency dental condition in an existing patient.2Legal Information Institute. Texas Administrative Code 22 TAC 114.1 – Permitted Duties Coronal polishing, sealant application, nitrous oxide monitoring, and every other delegable clinical task require the dentist to be in the office. Doing a direct-supervision task while the dentist is out is treated the same as performing an unauthorized task.
Signing Treatment Plans and Clinical Records
Assistants cannot sign treatment plans, prescriptions, or clinical records that reflect a dentist’s professional judgment. Because diagnosing and prescribing are practice of dentistry, the paperwork documenting those decisions has to carry the dentist’s authorization.9State of Texas. Texas Occupations Code 256.001 – License Required Signing a treatment plan or progress note as if it were the assistant’s call to make creates exposure for the assistant and the practice.
Scheduling and updating non-clinical contact information are fine. Insurance claims that reference diagnoses or treatment codes, progress notes documenting clinical findings, and forms verifying a clinical decision all need the dentist’s signature.
What Happens If an Assistant Crosses the Line
The TSBDE can discipline assistants who exceed their permitted duties. Actions run from a non-disciplinary remedial plan through administrative penalties, warnings, reprimands, probated suspension, enforced suspension, and revocation of registration.10Texas State Board of Dental Examiners. TSBDE Disciplinary Matrix An enforced suspension stops the assistant from working at all for the duration; revocation ends the career unless reinstatement is later granted.
Fines escalate with repeat conduct: up to $3,000 for a first offense, $4,000 for a second, and $5,000 for a third, with administrative penalties reaching $5,000 per violation and each day counted as a separate violation.10Texas State Board of Dental Examiners. TSBDE Disciplinary Matrix The supervising dentist is also on the hook. Texas law makes the delegating dentist responsible for every act delegated to an assistant, so a dentist who tolerates out-of-scope work can face suspension or loss of licensure.7Legal Information Institute. Texas Administrative Code 22 TAC 114.3 – Pit and Fissure Sealant If a patient is hurt by an unauthorized act, civil liability follows the board case.