Meet Our Doctors

Welcome Dr. Sarah Thornley

Dr. Sarah Thornley, a proud Spring Lake, Michigan native, was born and raised with a strong appreciation for dentistry, having grown up in a dental household where her father, Dr. Dennis Thornley, has long served the community as a dedicated dentist. From an early age, Sarah spent time in the office, observing and learning, and later worked as a dental assistant during summers, solidifying her passion for the profession and deepening her connection to the patients and families her father has served. 

Dr. Sarah pursued her undergraduate studies at the University of Michigan, earning a bachelor's degree in psychology, which strengthened her understanding of patient care communication. She went on to receive her Doctor of Dental Medicine degree from A. T. Still in Missouri, where her commitment to serve others and promoting oral health within her community continued to grow. 

Dr. Sarah is a member of the American Dental Association, the Michigan Dental Association and the Academy of General Dentistry. She is dedicated to lifelong learning and staying current with advancements in dental science and techniques. She is thrilled to be joining her father, Dr. Dennis Thornley and Dr. Kelly Reinhardt in the practice and is honored to care for patients in the community that helped shaped her. Dr. Sarah looks forward to building lasting relationships and delivering compassionate, patient-centered care, focused on both prevention and restoration. 

In her spare time, she enjoys time with family, her dog Dolly, playing pickleball, tending to her vegetable garden and bread making.

Family Photos

Dr. Reinhardt was born and raised in the Grand Haven area, and is a lifelong patient of the Bowen and Thornley Family Dental Practice, which is where her passion for dentistry began.  Dr. Reinhardt demonstrated enthusiasm for the dental profession from the age of 6 years old.  Her thirst for knowledge, inquisitive nature and desire to learn, continued to propel her towards her goal of becoming a Dentist. Many of you may remember Dr. Reinhardt as she worked many a summer as a dental assistant in the office, and for 3 years, she eagerly volunteered for the “Smiles from the Heart” free dental days hosted by Bowen and Thornley Family Dental Care. We are delighted to welcome Dr. Reinhardt; as we share her spirit of community service, and her passion for excellence in delivering the finest comprehensive care to our patients.

Dr. Reinhardt attended the University of Detroit Mercy; where she received her bachelor’s degree in Chemistry and went on to achieve her Doctorate of Dental Surgery. It was with great pride and admiration that her mentor, Dr. Dennis Thornley placed her Doctoral hood during this momentous occasion. Dr. Reinhardt is member of the Michigan Dental Association, American Dental Association, American Academy of General Dentistry, and is certified with the American Academy of Facial Aesthetics for Botox and Dermal Fillers.

Family Photos

Dr. Dennis Thornley was born in Japan while his father was stationed there with the U.S. Army. His family returned to Spring Lake when he was young, and he graduated from Spring Lake High School. He did his undergraduate studies at Muskegon Community College and Grand Valley State University and received his DDS from the University of Detroit Dental School. He joined our practice in 1994.

Dennis and his wife, Pam, have four children. He is a member of the American Dental Association, the Michigan Dental Association and the Academy of General Dentistry. He also serves as a consultant to the Ottawa County Careerline Tech Center's dental assistant education program. He (along with Dr. Bowen) has helped spearhead a "free dental" day for the disadvantaged in the trip-cities community.

Family Photos