Our Team

Dr. John Stangl

Dr. John Stangl was born and raised in Brooklyn Park, Minnesota. He completed his undergraduate degree at the University of Minnesota Duluth in 1984 and then completed Dental School at the University of Minnesota in 1988. Dr. John has been practicing dentistry in Buffalo for 35 years.

He has a strong passion for humanity and enjoys giving back to the community. Dr. John serves on the dental education board at St. Cloud Technical/Community College, provides Donated Dental Services, and participates in the annual Give Kids A Smile Day and Team Smile.

Dr. John is also a member of the Minnesota Dental Association, the American Dental Association, and the Minneapolis District Dental Society.

Dr. John has been married to Mandy for 32 years and they have 3 children, Keenen, Sophie and Quincy. He has a true love for dentistry and and all outdoor activities!

Dr. Cassie Grean

Dr. Cassie Grean grew up in Fridley, Minnesota. She completed her undergraduate degree at Gustavus Adolphus College in 2011 and obtained her Doctor of Dental Surgery from the University of Minnesota in 2016. Dr. Cassie lives in Buffalo with her husband Andrew, son Bennett, daughter Ada, and yellow lab Gus.

Dr. Grean loves getting to know her patients and their families. She enjoys giving back by volunteering in Operation Grace, Give Kids a Smile, Mission of Mercy and traveling to Guatemala. She is a member of American Dental Association, Minnesota Dental Association, Minneapolis District Dental Society, American Academy of Facial Esthetics and American Academy of Clear Aligners.

Outside of the office Dr. Cassie likes running, yoga, baking, and spending time with her family and friends. She is an avid reader and loves to chat books. She can't wait to talk dentistry with you and is committed to making the dental visit easy and stress free.