Our Staff



Fellowship-Academy of General Dentistry
Diplomate, American Academy of Craniofacial Pain


Private Practice (1989-Present)
Walled Lake, MI

Practicing phases of dentistry with emphasis on full mouth rehabilitation, TMJ, functional orthodontics, and migraine/headache treatment.


University of Michigan (1981-1984) LSA
Ann Arbor, MI

University of Michigan (1984-1988) Dental School
Ann Arbor, MI


Medical College of Ohio (1988-1989)
Toledo, OH

Hospital residency. Studied all specialty phases of dentistry with strong emphasis on full mouth reconstruction, surgery/ENT, endodontics, periodontics, and TMJ.

University of Buffalo (1999)
Buffalo, NY

Intensive program which covered treatment planning of complex cosmetic cases, new technology, sleep apnea, TMJ, Implants, and full mouth reconstruction.

Mid-America Ortho (2002)
Chicago, IL

Intensive orthodontic training program covering all aspects of orthodontic treatment and functional care for TMJ therapy.

Mini-Residency American Academy of Craniofacial Pain (2014)

Awarded Diplomate of American Board of Facial Pain (2015)


Office Management Program (1993, 2021)
Author, Publisher

Balancing Critical Elements (1997, 2021)
Author, Publisher

Office Staff

Lindsay Cortis
Office Manager
Lindsay is the Office Manager at Today’s Dental. She handles daily operations with emphasis on providing the highest level of care and respect for our patients. Lindsay is also responsible for hiring, directing, and developing high performance team members.
Lynn Gardiner
Certified Dental Asst
Lynn has worked in the customer service field her entire life. She is a certified dental assistant and graduate of the Michigan Dental Assisting School. She has a passion for the complex dental care that our office provides.
Sherry Kahn
Denture Specialist
Sherry has been working with Dr John since 2013 and is our Denture Specialist who loves to take on all challenging cases. She makes most of the dentures right here in our offices, saving our patients a lot of time and insures that they are completely delighted with the results.
Amanda Sparks
Registered Dental Hygienist
Amanda started working in the dental field as a dental assistant in 2001. It was then that she found her love for dentistry. She has worked in a few specialty offices, including orthodontics, and pediatric dentistry.

Free of Pain!

"I was in my 60s and I had terrible headaches. My doctor could not find the cause of my headaches. I have been treated by Dr. John for last few years and I am now free of pain. I...Read More

Highly Recommend!

"My dentist referred me here. I had seen numerous other doctors and dentists regarding my jaw pain and headaches. None of them knew what to do. Dr. John corrected my jaws and found a...Read More

Best Decision!

"I drive from Kentucky to see Dr. John. I was desperate to find the cause of my headaches. I had seen every specialist in the Midwest. Nobody could help me. Now I am cured thanks to Dr...Read More