Illinois Dental Assistant Requirements and Certifications

To work as a dental assistant in Illinois, you need nothing from the state to begin. There is no license, no registration, and no mandatory school for entry-level work. A dentist can hire you and train you on the job, and you can start performing basic chairside tasks under that dentist’s direct supervision. Illinois dental assistant requirements only tighten when you want to perform expanded functions like coronal polishing, sealant placement, restorations, or nitrous oxide monitoring, each of which has its own training and prerequisite rules.¹

Starting Out With No State Credential

The Illinois Dental Practice Act defines a dental assistant as someone who provides dental services under a dentist’s supervision and full responsibility. At the entry level, no formal program or state credential is required. The supervising dentist decides whether you are competent to perform authorized tasks based on your on-the-job training.¹

“No credential” does not mean “no limits.” The administrative code lists tasks a basic dental assistant cannot perform, including diagnosis, removing or restoring hard or soft tissue, scaling, placing composite restorations, administering anesthesia, making denture adjustments, and using a high-speed handpiece.² Everything outside that list is allowed, as long as the dentist authorizes it and you have been trained.

In practice, that means passing instruments, suctioning, taking and pouring impressions for study models, placing and removing rubber dams, and sterilizing equipment. A basic assistant can also remove loose, broken, or irritating orthodontic appliances on a patient of record to relieve pain, once the dentist authorizes it.¹

Supervision Is the Real Guardrail

Because there is no state registration system for assistants, supervision carries the weight that licensing would elsewhere. For expanded functions like polishing, sealants, restorations, impressions, and nitrous oxide monitoring, supervision means the dentist authorizes the procedure, remains in the dental facility while it is performed, and approves the completed work before the patient is dismissed. The dentist does not have to stand in the treatment room the whole time.¹

The dentist carries full legal responsibility for every service you perform. The dentist’s license is on the line for your work, which is why most offices verify training carefully even without a state registry forcing them to. There are also numerical caps: a single dentist cannot supervise more than four assistants performing coronal polishing or sealant placement at the same time.¹

Prerequisites Before Any Expanded Training

Before you can enroll in an approved course for coronal polishing or sealant placement, Illinois sets a prerequisite gate under 68 Illinois Administrative Code 1220.245. You must be at least 18 years old and meet one of the following: 1,000 hours of clinical dental assisting experience, graduation from a dental assisting program accredited by the Commission on Dental Accreditation (CODA), or current certification from the Dental Assisting National Board (DANB).³

This gate matters because polishing and sealant training is itself a prerequisite for the restorative work most assistants pursue later. You cannot skip ahead.

Coronal Polishing and Sealant Placement

The approved training course covers anatomy, physiology, pharmacology, and dental emergencies, followed by a written exam and hands-on clinical practice. Sealant training includes two hours of didactic study and two hours of clinical instruction. After the course, the supervising dentist must personally observe you successfully placing six sealants on patients before you can perform the procedure independently.³

When you perform coronal polishing, you can only polish the clinical crown and existing restorations above the gumline, and only with a rubber cup or brush. Air polishing is not allowed.¹

Placing Amalgam and Composite Restorations

Restorative work is one of the most advanced tasks a dental assistant can perform in Illinois. There are two paths to qualify. The first is completing a structured training program through a CODA-accredited institution, such as a dental school or dental assisting program. The second requires at least 4,000 hours of direct clinical patient care experience plus a training program offered by a statewide dental association approved by the Department.¹

Either path requires that you have already completed an approved coronal polishing and sealant course. That requirement is written into the statute.¹

The Expanded Function Dental Assistant Designation

Expanded Function Dental Assistant (EFDA) is a formal designation under Section 17.1 of the Illinois Dental Practice Act. To hold yourself out as an EFDA, you must complete approved training in all of the following:

Final impressions, taken with material or digital scans
Pulp vitality testing
Placing, carving, and finishing amalgam restorations, and placing, packing, and finishing composite restorations
Starting the flow of oxygen and monitoring nitrous oxide-oxygen analgesia
Coronal polishing and pit-and-fissure sealants
Intracoronal temporization (placing temporary fillings inside the tooth)

Training must come from an approved continuing education sponsor, a CODA-accredited dental assistant program, or a program approved by the Department. It must include Basic Life Support certification, and proof of current BLS must be kept on file with the supervising dentist.¹

Note one point of confusion: the EFDA designation itself does not require 2,000 or 4,000 hours of clinical experience. Those hour thresholds attach to specific expanded duties under Section 17(g). You can qualify as an EFDA by completing a CODA-accredited program covering all required areas without accumulating those hours separately.⁴

Nitrous Oxide Monitoring

You can monitor patients receiving nitrous oxide-oxygen analgesia, but you cannot start or stop the gas. Only a dentist or qualified dental hygienist may administer nitrous oxide and control the induction level. Your role is limited to monitoring once the gas has reached the appropriate analgesia level.

To qualify, complete an approved course of at least six hours covering anatomy, physiology, monitoring, pharmacology, and emergency procedures with emphasis on airway management. The course must include both classroom and clinical components, and you must maintain current BLS certification on top of the monitoring course hours.⁵

Dental X-Rays

Taking dental X-rays is not on the prohibited-duties list, so assistants can expose and process radiographs under the dentist’s supervision.² Radiation safety sits under separate state radiation protection rules rather than the Dental Practice Act, and offices typically train assistants in technique, film positioning, and safety as part of standard onboarding.

When BLS Certification Is Required

Basic Life Support certification is required for EFDAs and for assistants who monitor nitrous oxide. The Dental Practice Act references BLS as described in Section 16 of the Act, and proof of current certification must be kept on file with the supervising dentist.¹ The certification must include a hands-on skills assessment, not just an online exam. The American Heart Association BLS course is widely accepted in classroom and blended formats.⁶

If you pursue national certification through DANB, you also need current CPR, BLS, or ACLS certification from an approved provider, and the hands-on component is non-negotiable. Verify before enrolling in any online course.⁷

Coronal Scaling Had a 2026 Sunset

Coronal scaling was the most restricted expanded function for dental assistants in Illinois. Under Section 17(g), an assistant with at least 2,000 hours of direct clinical patient care experience and a 16-hour approved training course could perform supragingival scaling on a limited patient population — patients 17 or younger without periodontal disease, who were eligible for Medicaid, uninsured, or at or below 200 percent of the federal poverty level. Only hand instruments were permitted, and a dentist could supervise no more than two assistants performing scaling at once.⁴

The statute included a sunset clause making this provision inoperative on and after January 1, 2026. If the legislature has not extended the authorization, assistants may no longer perform coronal scaling. Confirm the current status with the IDFPR or the Illinois State Dental Society before pursuing any coronal scaling training.

DANB Certification Is Optional But Useful

Illinois does not require national certification. Earning the Certified Dental Assistant credential from DANB can still improve your options. DANB exams are recognized across the country, which simplifies relocation, and certified assistants report higher compensation and more opportunities in specialty practices, public health, and dental education.⁸

Inside Illinois, holding DANB certification is one of the three ways to meet the prerequisites for coronal polishing and sealant training without first accumulating 1,000 hours of clinical experience.³

Where Your Records Live

Unlike dentists and hygienists, dental assistants in Illinois do not hold a state-issued license managed by the IDFPR. The IDFPR licensing portal covers dentists, dental hygienists, and dental specialists, not assistants.⁹ Your credentials live at the dental office where you work.

You are responsible for maintaining your own documentation. Keep copies of every training certificate, BLS card, and course completion record. Your supervising dentist must have proof of your certifications on file and make them available to the Department upon request. When you change jobs, bring those records with you; your new employer has no state database to look you up in. Keep physical and digital backups.

EFDA training programs must issue a certificate of completion listing the training areas covered, and that certificate stays on file at the dental office.¹ If the Department audits the office, the dentist needs to produce that paperwork. Treat it as your paperwork too.

1
Justia Law. Illinois Code 225 ILCS 25 – Illinois Dental Practice Act
2
Cornell Law Institute. Illinois Administrative Code Title 68 1220.245 – Prescribed Duties of Dental Assistants
3
Illinois State Dental Society. Coronal Polishing and Application of Pit/Fissure Sealants
4
Illinois General Assembly. Illinois Dental Practice Act – Public Act 102-0936
5
Illinois General Assembly. Illinois Administrative Code Section 1220.245 – Prescribed Duties of Dental Assistants
6
American Heart Association CPR & First Aid. Basic Life Support (BLS) Training
7
DANB. CPR Providers
8
DANB. Earn Dental Assistant Certification
9
Illinois Department of Financial and Professional Regulation. Dental Professions