Our Staff
Grant R. Colling, D.D.S.
Dr. Colling received his Doctor of Dental Surgery degree from Creighton University, Boyne School of Dentistry in 1981, graduating with honors.
After graduation, Dr. Colling began his private practice in Fergus Falls.
Dr. Colling has studied extensively at the Dawson Center for the Advancement of Dentistry and the Pankey Institute for Advanced Dental Education in the areas of restorative and implant dentistry and TMJ diagnosis and treatment.
In pursuing his passion to deliver the best treatment in a comfortable relaxing setting, Dr. Colling participates in two Pankey Affiliated Learning Group study clubs. He also has been a member of the Heartland Study Club, having been a restorative advisor board member for many years. The Heartland Study Club has honored him with the awards for Clinical Excellence 1996 , Outstanding Clinician of the Year 1997, Clinical Excellence 1999, and Outstanding Clinical Presentation 2002.
Dr. Colling is married to Mary Ann and has three sons. He enjoys reading, cooking, photography and golf.
Mary Ann Colling
Meet Mary Ann, she is the voice of Riverfront Dental. From greeting you on the phone or in person, she will make your visit at Riverfront Dental feel like home. With degrees in Education and Psychology Mary Ann is able to facilitate the relationship between patient and provider.
Since her career change in 1988, Mary Ann has seen many changes in Dentistry. She has kept Riverfront Dental on the cutting edge of technology, implementing many systems and has been a vehicle in supporting the relationship between dentistry and whole body health. Keeping in touch with individualized care is always a goal. Aside from her profession, her passion is her family. Husband Grant and sons Ian and Aidan keep her smiling.
Brittany Summerville
Brittany has been with Riverfront Dental for 3 years. She received her
degree in Dental Assisting and in Dental Hygiene from NDSCS in Wahpeton, ND.
Brittany loves to work with children and will do everything she can to ensure your child will have a wonderful “first” dental experience. Brittany and her husband Nate live in Breckenridge, MN. They has a 2 year old son, Brock.
Summer is Brittany’s favorite time of year as she spends a lot of time at Ottertail Lake with family and friends.
Jacki Hahn-Rubish
Jacki joined our team in 1989, and we are very fortunate to have her. She graduated from NDSCS Wahpeton, ND in 1989. Jacki has seen a number of our patients grow up through the years. She enjoys working with people and developing one on one relationships. Jacki is committed to helping our patients improve their oral health: making it possible to improve their personal health. Jacki is married to Dale and they have three VERY busy girls. Emma 15, Tess 12, and Chloe 9.
When Jacki is not busy with the girls’ many activities she enjoys reading and volunteering at the parochial grade school her children have attended. Jacki and Dale purchased a motorcycle and enjoy riding with friends whether it’s out for evening dinner, to this or that small town place or a trip over several days. Jacki is also a Silpada Jewelry Representative.
Robyn Spilde
Robyn joined our team originally in 2002. In 2004 she and her family moved to
Missouri. After seven years of living and working as a Dental Assistant in Missouri she moved back to Minnesota and was able to join our team once again. Robyn lives in Dalton, MN with her husband Michael and their four children, Michaela, Lukas, Gregory and Christopher.
