Meet Our Team

Dr. Kristi Seibel - Pediatric Dentist


Dr. Kristi Seibel began her career in dentistry working as a dental assistant in high school. She continued in the dental field while completing her bachelors degree at the University of Massachusetts at Amherst. She earned her DMD degree from Tufts University School of Dental Medicine in Boston. While earning her DMD degree, Dr. Seibel was an officer in the Smile Squad, an extracurricular children's dental health education outreach program. After working some years as a general dentist, Dr. Seibel returned to Tufts to specialize in her first love, pediatric dentistry. Her training included treating children, young adults and special needs patients at New England Medical Center, the Cotting School and Brookline Dept. of Health Dental Clinic.


Dr. Seibel is also a Gold Award Scout and life member of the Girl Scouts of America. She is also a proud mother of two children.

Pediatric Dentist, Sudbury, MA, Kristi Seibel, DMD

Dr. Leo Spyrou - Orthodontist


Dr. Leo Spyrou takes pride in serving his patients with cutting-edge personalized care, using only the highest quality orthodontic treatment techniques and procedures, including Invisalign®, adult braces, and children’s braces. We strive to provide friendly, expert care in a relaxing, professional environment, so you can rest assured that you will receive the best treatment possible. Learn a little bit more about Dr. Spyrou below!


Dr. Leo Spyrou, brings over 30 years experience as both a dentist and an orthodontist to his patients in Reading and the whole “North of Boston” area. In addition to a Doctorate of Dental Medicine from Tufts University, Dr. Spyrou received specialty training in Pediatric Dentistry and Temporomandibular Joint Disorders before earning his Post-graduate Degree in Orthodontics.


As well as practicing orthodontics, Dr. Spyrou enjoys teaching postgraduate orthodontics in the orthodontic department at Tufts, and is committed to staying current with the latest advances in orthodontia for children and adults. He is a member of numerous associations, including the American Dental Association, the American Association of Orthodontists, the Northeastern Society of Orthodontists, and the Tufts Association of Orthodontists.


Dr. Spyrou is an experienced Invisalign Premier Preferred Provider treating both adults and teens with remarkable results.

Orthodontist - Sudbury, MA - Dr. Leo Spyrou

Jeff Guay, DMD – Orthodontist

Dr. Guay grew up in Wakefield, MA and received a B.A. in Biology from the University of Rochester in 1980. He attended dental school at the University of Pennsylvania School of Dental Medicine and received his Doctor of Dental Medicine degree in 1984. He completed Orthodontic training in 1986, followed by a year-long program in Temporomandibular Joint Disorders at Eastman Dental Center in Rochester, NY.


Dr. Guay is a member of the American Dental Association and Massachusetts Dental Society. 

Orthodontist - Sudbury, MA - Dr. Jeff Guay

Shailaja Thaker, DMD - Pediatric Dentist

I am passionate about providing the highest quality of dental care to children in the most comfortable atmosphere possible. By doing this, I am helping my patients enjoy their dental experiences and learn great life-long oral habits. I am fully committed and dedicated to ensuring each child I treat gets nothing but the best and gentlest dental care available. 

I take several continuing education courses throughout the year so I can keep informed about the newest and most proven research and developments in the field of pediatric dentistry. It is very important that I stay at the cutting edge of my field’s advancements so that I am able to provide every child I treat with the utmost the dental industry has to offer.​


I am originally from India and have called Boston my home for the last eighteen years. At home, my husband and I have two sons and two dogs. I enjoy exercising, reading, and cooking.

Orthodontist - Sudbury, MA - Dr. Jeff Guay

Our Staff

Our staff is especially trained in all aspects of caring for the dental needs of infants, children and teenagers. They receive ongoing continuing education both within our office and other educational lectures and meetings. Our philosophy is to treat every child like we treat our own children. After one visit you will see why we consider our staff "the best".