Our dental solutions are designed to create a smile that functions properly, lasts a lifetime, and is gracefully natural in complementing your facial features.


By harmoniously defining these four pillars of oral health, we can make sure your smile will look good and feel great for the rest of your life.

A Smile You Love
A Smile That Works
A Smile That Lasts
A Healthy Smile
journey to a new smile

Watch Her Video


Susan is a patient of Dr. Derek Harnish at Arch Dental.

As a University teacher, she was very self-conscious about her smile in and out of the classroom because she felt her teeth were crooked and discolored.

Tired of always worrying about what her smile looked like, Susan decided to shape her outlook to connect more fully with the people in her life.

Watch her 1-minute video and hear what she has to say about her comprehensive dentistry smile journey with Dr. Harnish.

Why not envision what your smile could look like with our holistic approach to dentistry?


You have the right to decide what your smile will look like. We'll work hard to provide the longest-lasting and most accessible options for your lifestyle and schedule.



Invisalign fitted over straight beautiful teeth

Invisalign orthodontic treatment consists of high-grade biomechanically engineered transparent aligners that are designed to fit perfectly over your teeth and gradually straighten your smile in just a few months. The best part? You don’t need to wear metal braces to have a straighter smile!

Bite Alignment

A patient is shown how her bite alignment will be adjusted with comprehensive treatment

Even minor discrepancies in your bite can present major health problems. Prevent decay, preserve your smile, and avoid pain by realigning and reconstructing your bite.

Comprehensive Exams

Dr. Harnish talks with a patient about his comprehensive exam

During your whole-health dental exam, we will identify and display your smile concerns on a big screen. You’ll be in the driver’s seat at all times and will see what we see to customize your treatment plan.

Oral Cancer Screenings

Dr. Harnish walking with his family

Safeguard your family and yourself from unrecognized health hazards. Regular oral cancer screenings are imperative for your health and well-being. We will perform a thorough visual and tactile examination of your head, neck, and oral tissues every time you come into our office.

Ultrasonic Tooth Cleaning

A young patient is shown how to properly brush

State-of-the-art technology enables us to give your smile a sparkle like never before. Using advanced ultrasonic technology, we break up bacteria and biofilm, cleaning the tooth, root surfaces, and difficult-to-reach spots.

Periodontal Treatment

Dr. Harnish working with an actual patient

Since gum and bone disease are directly linked to heart failure, digestive problems, reproductive deficiencies, and oral cancer, proper treatment is vital for a healthy and vibrant lifestyle.

Myofunctional Therapy

Dr. Harnish performing myofunctional therapy with a patient

Are you struggling to find an effective treatment for health issues like mouth breathing, nasal congestion, or sleep apnea? You may be a candidate for myofunctional therapy. This holistic solution uses exercises, similar to physical therapy, to retrain your mouth, face, and tongue muscles.



A preview of our dentist's in Fargo, ND guide to comprehensive dentistry.

Be redefining the standard of dentistry in Fargo, ND, our dentist’s aim is to redefine what it means to have a beautiful, healthy smile.

Download your FREE copy of The Complete Guide To Comprehensive Dentistry (AKA whole-health dentistry) to learn:

  • The unnoticed effect your oral health has on your organs
  • Why comprehensive dentistry creates true healthy smiles
  • What to expect at a comprehensive exam
A preview of our dentist's in Fargo, ND Infographic about comprehensive dentistry.

Comprehensive dentistry focuses not on just your teeth, but on your entire well-being as well. It maintains your overall health by using preventative measures for as long as you live.

Download your FREE copy of the infographic, Why Comprehensive Dentistry Makes Sense to see how:

  • It greatly reduces your overall time spent in the dental chair
  • It is way more affordable than traditional “drill & fill” dentistry
  • It prevents dental problems from developing again or ever occurring at all
Patient of Arch Dental in Fargo, ND dentists - John Smiling Testimonial

John (patient of our dentist in Fargo, ND)

“Dr. Harnish is a perfectionist! His careful attention to the details ensured I got a fantastic final result, and my bite is stable and comfortable now. The results were better than I had hoped for and I love having a big, bright smile!”


Your smile should embody who you truly are. Our dentist in Fargo, ND will empower you to shape and attain the smile you deserve.

Locations We Serve:
  • Fargo, ND
  • Moorhead MN
  • West Fargo ND
  • Oakport, MN
  • Dilworth, MN
  • Horace, ND
  • Sabin, MN
  • Detroit Lakes, MN
  • Lisbon, ND
  • Bismarck, ND
  • Grand Forks, ND