Our Staff


Dr. Juan Sauza

Dentist 80501My wife and I opened Avanti Dental Care in Longmont, Colorado in 2001. I am originally from Mexico City where I started my career in dentistry in 1979. I received a diploma from the Institute of Dental Prosthetics as a dental laboratory technician. I owned and operated a dental lab for two years while attending dental school in Mexico City, but eventually sold the lab to concentrate on my studies. I received my first Doctorate in Dental Surgery (DDS) from the Latino American University in Mexico City in 1985. Following graduation I completed a 1000-hour fellowship in the Mexican Social Services. My doctorate was recognized by the Universidad Autonoma de Mexico (UNAM). While pursuing my licensure in the United States I worked as a dental assistant. I practiced dentistry in Mexico and St.Thomas in the US. Virgin Islands prior to moving to the United States.

In 1997 I began dental school in the United States. In 2001, I received my American DDS degree from the University of Colorado Dental School. I have served as a tutor to dental assisting students in the front range area, as well as advisor to the dental assisting program for St. Vrain Valley School District. I am the past President of the Broomfield-Boulder County Dental Society. I remain current through continuing education and I’m actively involved in several study clubs including the Seattle Study Club of the Rockies and the Colorado Prosthodontics Dental Society. I am currently working towards a fellowship in the Academy of General Dentistry.

At Avanti Dental Care in Longmont we offer a full range of general dentistry services for all ages, including preventive, restorative, and cosmetic dentistry, as well as endodontics, dentures, partials, oral surgery, and final restorations for implants. We also have the ability to use IV sedation for patients with greater fears. My great staff and I are a family oriented practice that believes each patient deserves quality dentistry in a comfortable setting. I am proud to offer excellent dental care to Longmont's Spanish speaking community and beyond. Although our facility is state of the art, we offer a casual atmosphere to alleviate fears associated with dental treatment.

I enjoy spending time in Colorado participating in community events here in Longmont, Boulder and the surrounding front range. I enjoy attending Rockies games, coaching little league baseball, and traveling with my wife Ellen and our son Vincent.


Lori Haug

My name is Lori and I’ve been a member of the Avanti family here in Longmont since 2002. I earned a Bachelor of Science degree from the University of Colorado’s dental hygiene program that same year. I am a member of the American Dental Hygiene Association. As a hygienist I enjoy alleviating patient fears through education and a gentle touch. My favorite part of my job is getting to know my patients on a personal level, watching their families grow and change over the years. Prior to my career in dentistry, I was a flight attendant for 14 years.

In my spare time I enjoy seeing the world through the eyes of my beautiful daughter Maya, who was adopted from China in 2006. We enjoy spending time at local playgrounds, swimming, fishing, hiking, bike riding, attending theater productions, and doing any type of craft that involves glue, scissors and mess. I also volunteer in Maya’s classroom several times a month. My personal interests include cooking, gardening, traveling, and a new love of Rockies baseball.


Tracy Haselton

My name is Tracy Haselton. I have recently joined the Avanti team, but I’ve been in the dental field for 22 years, and have been a dental hygienist for 12 years and I love it! I have a teenage daughter and preschooler. Together with my husband, we enjoy camping, hiking, and fishing and exploring Colorado.


Juli Gaub

Hi my name is Juli. I joined the great staff at Avanti in 2013. Since earning my degree 20 years ago in Wyoming, I have been enjoying helping my patients achieve and maintain their ideal smiles. I spent many years in a dental specialty, caring for patients with periodontal disease. It is never too late to have a healthy mouth and our team at Avanti will help you each step of the way.

My husband Steve and I are both Montana natives. The joy of my life is being a mom to our two wonderful sons. I like fishing of any kind, from walleye to shark. I also enjoy the gun range, gardening and craft beer (especially Steve's homebrew).


Whitney Tinius

My name is Whitney and I have been the office manager at Avanti Dental Care in Longmont since 2005. I enjoy being the first communication that our patients have with our office. I strive to provide our patients with the best information regarding their needs and obligations to their health and that of their families. I previously worked in the law field, but find dentistry more satisfying.

I grew up in Longmont, but now live in Broomfield and have been married to my high school sweetheart Paul since 1990. We have two children Kyle and Courtney. As a family we love to watch baseball, camp and trail ride on our ATV’s. We feel fortunate to live in our magnificent state of Colorado and find we are often in awe of the places we have been.


Marlen Gutierrez

My name is Marlen and I have been with Avanti Dental Care since 2006. I earned my certificate in Dental Assisting at the Career Development Center while I was in high school. I am happily married and have a young daughter and enjoy spending time with my family.














Ashley Smith

My name is Ashley Smith and I am joining the Avanti team with 32 years experience as an expanded duties dental assistant. I went to Dental Assisting school in Denver. I originally moved to Colorado from Virginia, but have lived in Colorado the majority of my life. I love to visit my family and the beach every chance I get. I enjoy movies, music, golf, hockey, hiking and watching most sports. I have a beautiful daughter and an incredible son but my greatest joys in life right now are my two precious granddaughters.