ABOUT
DGY Dentistry Ann Arbor is a world-class restorative, renewal, and preventative dentistry practice. We employ an artistic and compassionate approach to maximize your outward appearance, inward health, and overall confidence.
Quality is at our core. Our pricing enables us to use only the finest materials. We take the time to do the job correctly because we know details matter and excellence does not happen quickly or by accident.
We pride ourselves in clearly communicating your procedures and choices with no-pressure consultations and transparent payment options. And with meticulous attention to detail, we can help make your smile a natural extension of your personality.
Our Philosophy
Compassion
Dentistry needn’t be a source of fear. Your comfort, safety, and trust are our top priorities.
Creativity
Our mastery of the science of dentistry means we combine our expertise with creative vision to give you a stunning, natural-looking smile. Artful Renewal.
Quality
Meticulous attention to detail and a world-class patient experience combine for unparalleled quality. Remarkable Results.
SEE HOW WE GIVE BACK
Zerrin Yilmaz, DDS
Dr. Zerrin Yilmaz, DDS joined Donaldson, Guenther + Yilmaz in 2012. A proud Ann Arbor native, she earned both an undergraduate degree in biology and her DDS at the University of Michigan. Always striving for personal and professional growth, she completed intensive training at the University of Detroit-Mercy and St. John Providence Hospital, as well as ongoing in-house training with her mentors – Dr. Guenther and Dr. Donaldson.
Keeping up with the very latest dental science, she has a deep passion for the full range procedures – from smile makeovers, gum grafting, and bridges to extractions, crowns, and root canals. She sees herself as a patient advocate, making sure each patient has all the information they need to make informed decisions.

Kirk Donaldson, DDS, MS
Dr. Kirk Donaldson, DDS, MS attended the University of Michigan for his undergraduate degree, DDS, and graduate degree in dental prosthodontics. From there, he’s built a career of continuous education. His passion for prosthodontics propelled his expertise in dental porcelain and cosmetic dentistry. He is also highly trained and experienced in implant surgery, bone and tissue grafting, root canal treatment, and oral sedation dentistry.
He received high academic and clinical honors from dental school and has served on the board for a large dental continuing education society. Through next-level dentistry, he is dedicated to empowering and enhancing lives, and making it possible for people to make their hopes a reality.

Dr. Steven Quell, DDS
Dr. Steven Quell, DDS is a Michigan native who attended the University of Michigan for his undergraduate studies. He then went on to earn his DDS degree from the University of Detroit Mercy, where he excelled both academically and clinically in treating complex cases. His dedication to providing the highest level of care is fueled by numerous advanced training programs and seminars, in addition to continuous mentoring from Dr. Yilmaz and Dr. Donaldson.
Dr Quell enjoys all aspects of clinical dentistry, with patients having wonderful experiences and results under his care. His calm demeanor and empathetic personality puts patients at ease as he delivers the highest quality care in a relaxed and comfortable setting. He looks forward to meeting you!

Kristin Guenther, DDS
It is with sadness and excitement that I am announcing my retirement from practicing dentistry. I will deeply miss seeing all of you and catching up on what is going on in your lives. Many of our connections go back more than 40 years! I always felt priviledged to work with and be trusted by such a talented and interesting group of people. It was a great career filled with great people like you and our team, a team my husband and I developed over 25 years as D&G. Our greatest joy has been to bring others to a better place in their lives. Health, confidence, beauty and overcoming life’s hurdles were our mission. Thank you with all my heart!
You are in good hands with the team at DGY! As a means of ensuring continuity of care, I will keep sharing my knowledge with the practice as questions arise concerning my patients and areas of expertise.
With sincere appreciation again, I send you a virtual hug.
Kristin Guenther, DDS