Minnesota is one of the most useful states to research because the agencies publish actual numbers instead of pointing you at a rule. The Board of Dentistry publishes professional development hours by license type. The Department of Health publishes x-ray fees per facility and per tube, and a 30-day notification deadline. And Minnesota voids employment non-competes by statute, which resolves the question most associates spend money to ask a lawyer about in other states.
Key takeaways
- Professional development per biennial cycle: 50 hours for dentists and dental therapists (30 fundamental, 20 elective), and 25 hours for dental hygienists and dental assistants (15 fundamental, 10 elective). Every licensee must complete an infection control course each cycle.
- The Minnesota Department of Health charges a $155 facility base fee initially and annually, plus $60 per dental x-ray tube.
- Registrants must notify MDH within 30 days of obtaining replacement or additional x-ray equipment, and before use, and must also notify MDH on a change of ownership or when equipment is placed in storage or removed.
- Under Minn. Stat. 181.988, a covenant not to compete in an employment agreement is void and unenforceable, with narrow exceptions for the sale of a business and for business dissolution. The definition of employee includes independent contractors.
Rules change. Everything below was verified against an official Minnesota or federal source in September 2026. Fees, PD rules and statutes change. Confirm with the agency before acting.
Who regulates what
| Topic | Agency | Official link |
|---|---|---|
| Dentist, therapist, hygienist and assistant licensure | Minnesota Board of Dentistry | Minnesota Board of Dentistry |
| Professional development (continuing education) | Minnesota Board of Dentistry | Professional development requirements |
| Dental hygiene and assistant scope | Minnesota Board of Dentistry, Minn. Stat. ch. 150A and board rules | Board statutes and rules |
| X-ray unit registration and fees | Minnesota Department of Health, X-ray Unit | MDH X-ray Program |
| Dental x-ray equipment standards and audits | MDH, Minn. Rules ch. 4732 | MDH X-ray Dental Facilities |
| Radiographic operator requirements | MDH and Minn. Stat. ch. 150A (licensed dental professionals only) | MDH dental registration guide |
| Infection control in the dental office | Minnesota Board of Dentistry (plus federal OSHA) | Board of Dentistry |
| Amalgam separators and dental wastewater | US EPA rule, enforced through your local pretreatment control authority | EPA Dental Effluent Guidelines |
| Corporate practice and practice ownership | Minn. Stat. ch. 150A plus entity filings with the Minnesota Secretary of State. The Board of Dentistry also registers dental corporations and firms. | Current licensee services |
| Sales and use tax on equipment | Minnesota Department of Revenue | Minnesota Department of Revenue |
License renewal and continuing education
Minnesota calls it professional development rather than continuing education, and the board publishes a requirements document that breaks it down cleanly by credential:
| Credential | Total hours per cycle | Fundamental | Elective |
|---|---|---|---|
| Dentists and dental therapists | 50 | 30 | 20 |
| Dental hygienists and dental assistants | 25 | 15 | 10 |
| Limited general license holders | 75 over three years | 45 | 30 |
The fundamental and elective split is the part people miss. Fundamental courses cover dentistry-specific content such as ethics, recordkeeping, diagnosis and HIPAA, and can be delivered as lectures, online courses with post-tests, study clubs or college coursework. Elective courses may be only indirectly related to dentistry, including health and wellness, dental research or community service. Piling up 50 hours of elective content does not satisfy the rule.
One course is mandatory for everyone: an infection control course during each biennial renewal cycle that primarily addresses patient safety.
Documentation is portfolio-based. Licensees maintain records for the current biennial renewal cycle and the previous completed cycle, and the board audits. Keep certificates, not calendar entries.
Renewal runs through the board's online renewal system, which also handles corporation and firm registrations and dental lab registrations. If your practice is registered as a corporation with the board, that registration has its own renewal that is easy to forget.
X-ray equipment: registration and inspection
The MDH X-ray Unit inside the Environmental Health Division registers and regulates dental x-ray equipment under Minnesota Rules chapter 4732. The department publishes a dental-specific registration guide, which is the single most useful document for a Minnesota practice owner.
The numbers and deadlines MDH publishes:
- Facility base fee: $155, due initially and annually.
- Dental x-ray equipment fee: $60 per tube.
- Notification deadline: registrants who purchase replacement x-ray equipment must notify MDH within 30 days of obtaining it, and prior to use.
- Ownership, storage and removal: registrants must notify MDH when there is a change in ownership, or when x-ray equipment is placed in storage or removed from the registrant's physical location.
MDH explains why the transfer notifications exist: the department wants equipment to stay in the hands of validly registered facilities, to be handled and secured properly, and not to end up in unauthorized use. That framing tells you how a regulator will view a private-party sale that nobody reported.
Minnesota also requires an annual audit for dental facilities, and a quality assurance program under Minn. Rules part 4732.0520. MDH publishes an "Annual Audit, Dental" form for exactly this. Equipment standards are split by modality: intraoral systems under 4732.0880, extraoral under 4732.0890, and dental CT systems under 4732.0895. If you are shopping for a used CBCT, the dental CT part is the one to read before you buy.
Who may operate dental x-ray equipment
Minnesota is restrictive and clear. Under Minn. Stat. ch. 150A, dental x-ray equipment may be operated by licensed dentists, licensed dental therapists, licensed dental hygienists, and licensed dental assistants. Qualification documentation must be kept on site and available for review. There is no informal "trained in-house" path here the way there is in some states, which means your hiring plan and your radiography coverage are linked.
For the general mechanics, see our guide to dental x-ray registration and inspections.
Buying and selling used equipment in Minnesota
Registration, transfers and storage
Minnesota gives you an unusually explicit playbook. Buy a used unit: notify MDH within 30 days and before you use it. Sell a unit or hand a practice to a new owner: notify MDH of the ownership change. Pull a unit out and leave it in the basement: notify MDH that it is in storage. Ship it out: notify MDH that it is removed from your location.
Because the fee structure is per tube, removing a decommissioned unit from your registration has a direct dollar value: $60 per tube per year that you stop paying. That is a small number, but it is also the cleanest possible incentive to keep your inventory current.
During due diligence on a practice purchase, ask for the current MDH registration and the most recent annual audit. If you are buying a practice with a CBCT, ask whether the unit was registered under the dental CT standard and whether the shielding was reviewed. Our due diligence checklist has a place to record all of it, and our CBCT guide covers what to check on the machine itself.
Amalgam separators and wastewater
The federal EPA dental rule at 40 CFR Part 441 controls. If you place or remove amalgam and discharge to a publicly owned treatment works, you need a compliant separator, you follow the best management practices (no flushing scrap amalgam, no oxidizing line cleaners), and you file a one-time compliance report with your pretreatment control authority, which in the Twin Cities metro is typically the regional wastewater authority and elsewhere the municipal utility.
Call that authority at the point of sale and ask what it wants from the new owner. EPA's page does not address transfers. See amalgam separators for equipment selection and recycling records.
Lead, chemicals and decommissioning
Film processing leaves fixer, developer and lead foil. Lead aprons fail eventually. Lead-lined panels come out of walls during remodels. Handle all of it through a licensed waste vendor and keep the manifests. See dental waste disposal and disconnecting dental equipment safely.
Non-competes and employment
Minnesota changed the answer to this question in 2023. Minnesota Statutes section 181.988 provides that any covenant not to compete contained in a contract or agreement is void and unenforceable in the employment context. Two exceptions survive:
- Sale of a business. Parties to a sale may agree to a temporary and geographically restricted covenant preventing the seller from carrying on a similar business within a reasonable geographic area for a reasonable period. This is the exception that keeps practice sales workable, and it is why a seller's covenant in a dental transaction is a different animal from an associate's.
- Dissolution. Partners, members or shareholders dissolving a partnership, LLC or corporation may agree not to carry on a similar business within a reasonable geographic area where the business operated.
The statute defines employee to include independent contractors, and extends to corporations and LLCs where an employer requires an individual to form such an entity as a condition of receiving compensation. That closes the obvious workaround of classifying an associate as a 1099 contractor or requiring them to bill through a professional entity.
The statute also protects against out-of-state choice of law and venue provisions, and allows an employee to recover reasonable attorney fees when enforcing rights under the section.
What the statute does not obviously answer is which agreements it reaches. The revisor's page carries the 2023 session law history but does not include an applicability section spelling out a cutoff date for agreements signed before enactment. If you signed a covenant before the law changed, do not assume it is dead and do not assume it is alive. Ask a Minnesota employment attorney.
A ban on non-competes does not ban everything. Non-solicitation of patients and staff, confidentiality obligations, and provisions tied to a buy-in or a sale are separate questions. Read the whole agreement, not just the clause with the word "compete" in the heading.
Nationally, the FTC's non-compete rule is not in effect after the Commission voted on September 5, 2025 to dismiss its appeals and accede to the vacatur. Minnesota's statute is doing the work here, not federal law. See non-compete agreements for dentists for background.
What we could not confirm
- The applicability date of Minn. Stat. 181.988, meaning which agreements the ban reaches. The revisor's page does not include an applicability subdivision.
- MDH inspection intervals for dental facilities, as distinct from the annual audit the facility performs on itself.
- The renewal dates for Minnesota dental licenses. The board publishes the professional development cycle but not a single universal renewal date on the pages we read.
- Sales and use tax treatment of dental equipment in Minnesota. Confirm with the Department of Revenue and your CPA.
- The board's specific requirements for registering a dental corporation or firm, and what limits apply to non-dentist ownership. Confirm with the board and a dental-specific attorney.
Where to verify
- Minnesota Board of Dentistry: board home, professional development, and statutes and rules
- Minnesota Department of Health: X-ray Program, dental facilities, and the dental registration guide
- Minnesota Revisor of Statutes: Minn. Stat. 181.988 and Minn. Rules ch. 4732
- US Environmental Protection Agency: dental effluent guidelines, 40 CFR Part 441
- Federal Trade Commission: September 2025 statement on the non-compete rule
- Minnesota Department of Revenue: revenue.state.mn.us
Putting it to work
Minnesota rewards owners who keep a tight equipment inventory. Reconcile your MDH registration against the machines in the building once a year, file the 30-day notifications when equipment arrives or leaves, and keep the annual dental audit form with your other compliance records. On the employment side, have a Minnesota attorney rewrite any associate template that still contains a straight non-compete, because in this state the clause is likely void and the rest of the agreement is where your actual protection lives.
Related reading: x-ray registration and inspections, the pre-purchase equipment checklist, the compliance chapter, and the rest of the state resources directory.
This guide is educational content and does not constitute legal, financial, tax, or clinical advice. Laws and regulations vary by state and change over time. Consult your own dental-specific attorney, CPA, and state dental board before acting.