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Office Hours

  • Monday to Friday8:00am to 5:00pm


Dr. Andrew Kelson

Our Dentists in Longmont continually focused on helping our valued patients optimize their smiles with diligent, comprehensive, and personalized care, you can trust that Dr. Andrew Kelson and the entire Dental Horizons team at our dental clinic in Longmont will go above and beyond to positively impact your smile and quality of life. With treatment recommendations by our dentists in Longmont, Colorado that put your needs and goals first, leading technologies that enhance your care, and open and honest communication throughout every step of the process, we’re here for you!

Meet Our Doctor

Dr. Jameson Ribbens

Focused on delivering compassionate and effective care that helps optimize his patient’s oral health and smiles, Dr. Ribbens devotes himself to making dental visits comfortable, efficient, and fun!

A Message From Our Doctors

3 Things Every Patient Should Know


Your Mouth Is Connected To Your Body.

As dentists in Longmont, Colorado, we can provide powerful insights to your primary care physician about things we see in your mouth that could be linked to other symptoms in your body.

Dentistry Is Not What It Used To Be.

Lasers, intraoral scanners, digital radiographs, and milling machines allow us to provide more efficient and effective dental care in Longmont. A bad dental experience doesn’t have to define how you see dentistry now and in the future. Rest assured that we’ll always do everything we can to help you take on a different perspective on caring for your smile!

Our Relationship Is NOT Transactional.

As a right dental care in Longmont, we care about you as an individual and believe our relationship is based on values of mutual integrity, good communication, and gratitude. Our goal is to overcommunicate because we value what we have to offer and feel passionate about how we can partner with you to care for your well-being. Because of this, our dentist in Longmont, Colorado does not recommend treatment based on insurance benefits. We will advocate for you to utilize whatever benefits are available at our dental clinic in Longmont, but we’ll always recommend what we know is the best solution for your needs.

Top Reasons

We Could Be Your Perfect Dental Clinic In Longmont

Focused On You

  • We treat you & not just your teeth
  • Your optimal oral health is our focus
  • Treatment recommendations are always personalized

Proven Technologies & Techniques

  • Trusted technologies to heighten your care
  • We create a variety of dental restorations in-house
  • Providing sleep apnea treatment & goop-free impressions

Comprehensive Care

  • Myriad preventive, restorative, & periodontic services
  • Numerous cosmetic solutions available
  • Your comfort & needs are our priorities


Welcoming New Patients

We relentlessly pursue excellence in all we do, and we’d love to walk beside every member of your family to protect, strengthen, and maintain their beautiful smiles. Contact our dental clinic in Longmont today and let’s work together to prioritize your oral and overall health!

In Longmont

Dental Services

Is Your Child A Candidate

For HealthyStart®?

If your child has misalignment, crowding, or bite issues, or experiences sleep-disordered breathing, the HealthyStart system is a non-invasive, non-pharmaceutical, and pain-free approach designed to help. Click below to learn more and schedule a free consultation at our dental clinic in Longmont!

We Accept

Most Insurance Plans

We’re committed to doing everything we can to help our community members receive the high-quality, effective, and long-lasting dentistry they deserve. In addition to being an unrestricted practice that will always provide the care you require, we’ll advocate for you to receive any insurance benefits you have paid for. No insurance? Our affordable dental membership plan can help. Ask us for details!


Contact Us

With emergency care, convenient appointment times, leading technologies, and an ongoing commitment to excellence in everything we do, your smile is in good hands at Dental Horizons in Longmont. Whether you’re in need of preventive, restorative, periodontic, cosmetic, or sleep apnea services, we’re here to help!
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