Becoming a dental hygienist takes about three years from start to finish for most people: one year of prerequisite coursework followed by a two-year associate degree program. With a median salary of $94,260 as of May 2024, it’s one of the highest-paying careers you can enter with a two-year degree. Here’s what each step looks like.
Complete Prerequisite Coursework
Before you can apply to a dental hygiene program, you’ll need to knock out roughly 40 credit hours of prerequisite college courses. These typically include chemistry, English, speech, psychology, and sociology. You can take them at any community college or university, and most students finish in two to three semesters.
The baseline admission requirements are a high school diploma or GED, high school courses in math, chemistry, biology, and English, a minimum 2.0 GPA, and college entrance test scores. That said, the 2.0 minimum is just a floor. Dental hygiene programs are competitive, and many applicants have GPAs well above 3.0. Strong grades in your science prerequisites carry the most weight, so prioritize those classes.
Choose a Degree Path
Most dental hygienists enter the field through an associate degree, which takes about two years of full-time study after prerequisites. This is the fastest route to licensure and clinical practice. Programs combine classroom instruction in anatomy, pharmacology, radiography, and periodontics with supervised clinical hours where you work on real patients.
Bachelor’s degree programs take four years total and bundle prerequisites into the curriculum. The extra coursework covers research methods, public health, and leadership. A bachelor’s degree isn’t required to practice, but it opens doors to roles in education, corporate dental companies, and public health agencies. If you think you might want to teach or move into management later, starting with a bachelor’s saves you from going back for one.
Make Sure Your Program Is Accredited
This step is non-negotiable. Your program must be accredited by the Commission on Dental Accreditation (CODA), the only specialized accrediting body recognized by the U.S. Department of Education for dental and dental hygiene programs. If you graduate from a program that loses its CODA accreditation, or one that never had it, you will be ineligible to sit for licensure exams in most states. Before you enroll anywhere, verify the program’s accreditation status on CODA’s website.
Pass the National Board Exam
After graduating, your first licensing hurdle is the National Board Dental Hygiene Examination (NBDHE). It’s a 350-question multiple-choice test split into two components.
The first component covers 200 questions across three areas: the scientific basis for dental hygiene practice, clinical dental hygiene services, and community health and research principles. The second component presents 12 to 15 patient cases with 150 questions that test your ability to assess patients, interpret X-rays, plan treatment, perform periodontal procedures, choose preventive agents, and handle professional responsibilities.
Scores range from 49 to 99 on a scaled system, and you need a 75 to pass. Results are reported simply as pass or fail. The exam is designed to test not just what you memorized but whether you can apply that knowledge to realistic clinical scenarios. Most accredited programs build their curriculum around NBDHE content, so if you’ve done well in your courses, the exam should feel like familiar territory.
Pass a Clinical Licensure Exam
The national board tests your knowledge on paper. The clinical exam tests whether you can actually perform dental hygiene procedures on a live patient. Every state requires one, but which exam your state accepts varies. Five regional testing agencies administer these exams:
- CDCA (ADEX Exam), accepted in the largest number of states
- WREB, commonly required in western states
- CRDTS, used in several midwestern states
- SRTA, used in parts of the South
- CITA (ADEX Exam), accepted in select jurisdictions
Before registering, contact the dental board in the state where you want to practice. Some states accept multiple exams, while others recognize only one. Accepted exams also expire after a certain number of years, so timing matters if you plan to move or delay your application. These details change regularly, and getting it wrong can cost you months.
Apply for State Licensure
Once you’ve passed both exams, you apply for licensure through your state’s dental board. Requirements vary by state but generally include proof of graduation from a CODA-accredited program, passing scores on the NBDHE and a clinical exam, a background check, and CPR certification. Some states also require a jurisprudence exam covering that state’s specific dental practice laws. The application process itself is mostly paperwork, but allow several weeks for processing.
Keep Your License Current
Licensure isn’t a one-time event. Every state requires continuing education to renew your license, typically on a two-year cycle. The exact number of hours varies by state, but most require somewhere between 12 and 30 hours per renewal period. Topics often include infection control, CPR recertification, and courses specific to your state’s regulations. Many CE courses are available online, though some states require a portion to be completed in person.
Salary and Job Outlook
The financial return on a dental hygiene degree is strong. The median annual wage hit $94,260 in May 2024, and the top earners make well above that, particularly in metropolitan areas and states with higher costs of living. Employment is projected to grow 7 percent from 2024 to 2034, which the Bureau of Labor Statistics classifies as “much faster than the average for all occupations.” An aging population keeping more of their natural teeth, combined with growing awareness of the link between oral health and overall health, is driving steady demand.
Most dental hygienists work in private dental offices, though positions also exist in hospitals, public health clinics, schools, and corporate dental chains. Part-time and flexible schedules are common in this field, which is one reason it consistently ranks among the most satisfying healthcare careers.
The Full Timeline
If you’re starting from scratch with no college credits, expect the associate degree path to take about three years: roughly one year of prerequisites plus two years in the dental hygiene program. A bachelor’s route takes four years. Add a few months after graduation for exam preparation, testing, and the licensure application. Most people are working as licensed dental hygienists within three to four years of their first college class.