•Our Mission Statement•

It is the mission of our office to strive for honest, friendly, individualized dental care in an environment that is understanding of our patient’s needs.

It is our aim to provide the highest level of dental care, offering a variety of services enhanced by technology and an experienced, compassionate dental team.

We strive to establish long lasting relationships, driven by trust and comfort, to help our patients reach and maintain optimal dental health for life. 

IMG 0793 scaled e1601209468226

•Meet Our Team•


Dr. John Isbrandt


mary scaled e1614442340849


Office Coordinator



Dental Hygienist



Dental Assistant



Dental Assistant

IMG 1640


Office Coordinator

patti dean street dental


Dental Hygienist



Dental Hygienist

Why Us


Qualified Doctor

Dentist Chair

Latest Technology


Skillful Craftsmen

dental record

Serve With Hearts

All our professionals at Dean Street Dental maintain the highest levels of accreditation and pursue ongoing continuing education to stay abreast of the latest advancements in the dental field.

Meet Dr. John

Dr. Isbrandt doesn’t have much of a professional bio (just kidding click the previous link to learn more) – just know he’s great. Dr. Isbrandt resides in downtown St. Charles with his wife and has three grown children. When he’s not practicing dentistry, he enjoys playing golf, hiking, snow skiing and biking.

Hiking hiking in beautiful inspirational mountains
Ski detail on ski
Mountain biking

Meet Mary

Mary has been with our practice since August, 2009. She has over a decade of experience working in the dental field. She truly enjoys working in a positive and comforting work enviroment and strives to provide every patient with an amazing experience in our office. She and her husband have resided in Elgin all their lives and raised their four children there, as well. In her free time, Mary enjoys spending time with her grandchildren. She also enjoys going camping with her family, friends and English Retriever, Major.

Camping buddies
teen age girl holding a English golden retriever puppy
Studio shot of english cream golden retriever isolated on white studio background

Meet Mel

Mel joined our team in May 2017. She has been working in the field of dentistry for over 25 years. Needing braces as a child gave Mel an early introduction to the dental office. Mel felt the braces not only changed her smile, but her entire life. This influenced her to want to make the same impact in our patients’ lives. At home, Mel enjoys traveling with her husband and spending time with her daughter. She loves to “eat, drink & be merry.”

happy couple traveling by car with map
Mother and little daughter play in kid's store
Laughing woman laughing with male friend at a cafe, close up

Meet Sara

Sara has been in dentistry since graduating from ECC’s Dental Assisting program in 2005. She is a board certified dental assistant with multiple certifications including radiography, infection control, coronal polishing, fluoride application and sealant placement. Sara prides herself on creating long lasting relationships with her patients and keeping up with continuing education classes in order to provide the best quality of care. She loves being an “Aunty” and spending time with her husband and family. In her free time she is busy crafting/completing DIY projects, singing, enjoying nature, and loving her fur-babies!

Family making crafts
Happy girl singing using smartphone as mic
Fitness girl with a smartphone on nature background

Meet Patti

Patti graduated from Phoenix College Dental Hygiene in 1995 and worked in the Valley of the Sun for 25 years. Many years of her career were spent focusing on the “chronologically gifted” in retirement communities. She also loved volunteering at the VA Medical Center. Continuing her education, she graduated from ASU in 2013 with a degree in Aging and Life Development. She moved to St Charles in 2016 and has grown to love the Fox River Valley. In her spare time, a few of her favorite things are biking, yoga, traveling and enjoying different culinary experiences.

Fitness girl with a smartphone on nature background
Mountain biking
happy couple traveling by car with map
Laughing woman laughing with male friend at a cafe, close up

Just Make An Appointment!