Sweet Grass Dental Associates

About Us

Healthy Smiles All Around Fort Collins

Thinking about your child’s teeth might not be a big cause for smiles.

If you’re like us, you’ve worried about cavities, brushing, and whether people will judge you for not even attempting to floss your toddler’s teeth.

You want your kids to be happy and have a strong foundation for a lifetime of health. You know that visiting the dentist is a part of that goal, but finding one who is actually good with kids is a chore. (And what if your child throws a fit in the dentist chair?!?) The pediatric dental team at Rockies Kids DDS in Fort Collins can help families find comfort during visits to the dentist’s office.

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At Pediatric Dentistry of the Rockies, we get it.

We’ve seen all kinds of kids with all kinds of needs and behaviors, and it didn’t bother us a bit. In fact, we’ve dedicated our whole careers to helping children just like yours overcome their fear and anxieties and become confident, carefree dental patients.

Together, we can protect your child’s health and instead set them up for an active, healthy life with no limits.

Get to Know You

Your kids are unique! We’ll listen to your concerns and help your kiddos feel safe and have FUN--no perfect behavior required.

Take Proactive Action

We’ll check in with you every six months to monitor your child’s oral health. If they need treatment, we often can address it the same day.

Superb Oral Health

We’ll help your child enter life equipped with the habits and motivation they need to stay healthy.

We believe that oral care for children is crucial to their long term health, and we are dedicated to providing it for families in the Fort Collins area in a comfortable, fun way. We can help you take proactive steps to protect your child’s oral health and set them up for a life with a healthy, happy smile.

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Meet the Team

Dr. Keith A. Van Tassell, D.D.S.

Dr. Keith is a Board Certified Pediatric Dentist. He dedicates himself to providing the best dental care possible for his patients, ensuring that they have a positive and fun experience while learning to care for their own oral health. Graduating Magna Cum Laude from the Virginia Commonwealth University School of Dentistry, he then attended the University of Nevada School of Medicine for a two year pediatric dental residency.

Dr. Keith, his wife, and their five children enjoy spending time together outdoors and being a part of the Fort Collins community.

Memberships and Professional Associations

Dr. Zachary Alleman, D.D.S.

Pediatric dentistry is a perfect fit for Dr. Zach, who has always been surrounded by children. He is the fifth of eight children, father of two, and uncle to 25 nieces and nephews. He loves providing quality and fun treatment to ensure each child gets off to a terrific start with their oral health. Dr. Zach received his dental training at Baylor College of Dentistry, where he also completed his residency in Pediatric Dentistry.

Dr. Zach loves to read, play sports, and spend time outdoors with his family..

Admin Team

  • Brandy
    Business Administrator
  • Danielle
    Sedation Coordinator
  • Brooke
    Recare Coordinator
  • Val Insurance Coordinator 
  • Alicia
    Clinical Coordinator
  • Julie
    EDDA, Flow Coordinator
  • Jackie
    RDH, Hygienist

Dental Assistants

  • Bianca
  • Morgan
  • Ruby
  • Kylie
  • Courtney
  • Taylor
  • Ciara
  • Nezzie
  • Jazmeen
  • Nadine
  • Cassandra
  • Ruby
  • Sophie
  • Arly
  • Makena
  • Meriyah 
  • Faith 

Sterile Tech / Dental Assistants

  • Nina

Join Our Family

We can’t wait to welcome you.

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