About Us

AboBronecki Robert_high resut Dr. Robert A. Bronecki D.D.S.

– Graduated from Marquette University School of Dentistry Grad in 1990
– Graduated from University of Wisconsin, Milwaukee in1986
– Served in the Air Force as a Dentist Captain from 1990 to 1994
– Practicing Dentistry in private practice since 1994
– Hobbies include: Musician, Composer, Engineer

Dr. Bronecki has been in private practice in the great state of Montana since 1994, focusing on providing quality, gentle dental care to all of his patients.

After earning his Degree of Dental Surgery in 1990 from the Marquette University School of Dentistry Dr. Bronecki joined the Air Force. Serving 4 years as a Dentist Captain at Montana’s Maalstrom Air Force Base, he quickly decided to stay in the Big Sky State as “Everywhere you look in Montana it looks like a picture and it is most inspiring”.

Dr. Bronecki loves working with his patients at Castle Rock Dental and looks forward to helping you enjoy the confidence of a beautiful smile.

About Dean P. Sullivan

Dean P. Sullivan B.A., D.D.S., the son of Dr. and Mrs. Dean P. Sullivan Sr. D.D.S, born May 13, 1939 at Deaconess Hospital in Billings, Montana.

Dean attended Fratt Elementary School and Central High School while growing up in Billings, Montana. Later, Dean moved to Helena, Montana to attended Carroll College in pursuit of a Bachelor of Arts Degree in Biology and Chemistry. Dean continued his education by attending a summer session in 1960 at Kansas University. Realizing he desired to further his education, Dean relocated to Omaha, Nebraska to attend Creighton University, thereby being awarded the degree of “Doctor of Dental Surgery” in 1964.

Most young men of Dean’s generation enlisted in the Armed Services and Dean was of no exception. In 1964, Dean P. Sullivan became a member of the United States Air Force located at Travis Air Force base in Fairfield, California. Dean was honorably discharged from service in 1966 as a Captain of the Dental Corps.

In 1966, an opportunity presented itself in Minneapolis, Minnesota where Dean instructed dentistry part-time at the University of Minnesota School of Dentistry for over 5 years while establishing a private practice from 1966 to 1985.

In 1985, Dr. Sullivan returned to Billings to establish his practice.

In 1998,seeing the need for quality denture design and care, the Heights Denture Clinic was established, and is now the Billings Denture Clinic.

Dr. Sullivan has also recently taught dental hygiene at the Sheridan College in Sheridan, Wyoming.