Sara Sheikh, DMD

School of Dental Medicine, Boston University

Dr. Sheikh received her DMD from Boston University’s School of Dental Medicine and has continued education in implantology, prosthetics, restorative and laser dentistry, and digital CEREC dentistry. She is also part of the American Dental Association, Maine Dental Association, York County Dental Society and the American Academy of Oral Medicine. Prior to Kennebunk Center for Dentistry Dr. Sheikh practiced dentistry in Brunswick, Maine and Newport, Massachusetts as well as at Mountainside Hospital in New Jersey where she worked with in oral surgery and with special needs patients. Dr. Sara Sheikh is also a clinical assistant professor at University of New England’s College of Dental Medicine.

Dr. Sheikh has a twin sister who, along with her husband, is also a fellow classmate at Boston University. Dr. Sheikh is an absolute foodie. When she has spare time, she is either reading a food blog, watching the Food Network or Cooking Channel, or making something in the kitchen. She also enjoys being with her family and FaceTiming with her nephew.


Spencer Crook DMD, MS – Endodontist

Dr. Crook has been practicing endodontics for over 15 years. He takes pride in delivering care in a compassionate and gentle manner. Dr. Crook believes that since each person is unique, every situation needs to be assessed and diagnosed individually. Dr. Crook graduated with a Doctor of Dental Medicine from Temple University. After dental school he continued his training at the University of Louisville Hospital where he did a general practice residency. After completing the hospital program he moved to Michigan. He received his specialty training in Endodontics at the University of Detroit Mercy. Along with his specialty certificate he also received a Master of Science degree in oral microbiology. Dr. Crook has a family of five and loves to go outdoors and relax by the ocean.


Samuel Koo DDS, MS, DMSc – Periodontist (Implant Surgeon)

Dr. Koo graduated with a Doctor of Dental Medicine from Tufts University. He completed a certificate in advanced graduated studies (CAGS) in implantology at Boston University. He pursued a Doctor of Medical Sciences in Periodontics from Harvard University. He has received prestigious awards in periodontics which includes the Fellow in Implant Dentistry at International Team for Implantology (ITI), Teaching with Technology Award in Tufts University, James H. Shaw Award for Achievement in Research and Contribution to the Field in Harvard School of Dental Medicine and Dr. D. Walter Cohen Award by the American Academy of Periodontology. Outside of work, he loves spending time with his children and traveling. His philosophy of care involves treating patients as family and educating patients through every step of their treatment.


Jon Ryder, DDS, MS

Dr. Jon Ryder serves as Dean of the College of Dental Medicine at the University of New England. He has served in leadership roles for the UNE College of Dental Medicine since its opening, including Assistant Dean for Academic Affairs, Executive Associate Dean and as Interim Dean.

Dr. Ryder received his B.A. in Asian Studies from Augustana College and his D.D.S. from the University of Iowa College of Dentistry. He earned an M.S. in Oral Medicine and Orofacial Pain from the University of Southern California Herman Ostrow School of Dentistry. Following dental school, Dr. Ryder entered private practice as the owner of two dental practices in Iowa. He was an adjunct assistant clinical professor in the Department of Operative Dentistry at the University of Iowa College of Dentistry for over 12 years. Dr. Ryder has completed considerable post-graduate education in CAD/CAM dentistry, oral medicine, orofacial pain, dental implant surgery and prosthetics, and also has extensive private practice experience in complex/advanced fixed and removable full mouth rehabilitation.

Since 2004, Dr. Ryder has organized and led dental humanitarian trips to Southeast Asia, where he has also regularly volunteered and lectured. He worked for many years, both individually and as part of a team, with dental schools in Cambodia on curriculum design and educational development. He has received awards for his work as an educator and advisor to the dental schools as well as the Cambodian Ministries of Health and Education. Prior to joining the faculty of UNE College of Dental Medicine, Dr. Ryder also practiced in a large international group practice in Singapore.

Recent research interests include the efficacy of botulinum toxin A for the treatment of trigeminal and post-herpatic neuralgias.