Meet Our Team

Gentle and Confident Touch

Ali Sedighian, D.D.S.

Dr. Sedighian is a graduate of University of Maryland at College Park with a degree in Bachelor of Science in Electrical Engineering. Later on, he attended the University of Maryland Dental School - one of the best in the country - where, in 1997, he graduated and received his DDS degree. He has been a dentist for many years and has been through several post graduate courses in different fields of dentistry since receiving his D.D.S. degree.


At Ellicott City Dentistry, Dr. Sedighian has emphasis on patient comfort as well as keeping up-to-date with the latest advancements in dentistry, enabling him to provide his patients with the best quality of care in the field. Dr. Sedighian has a wide range of experience in different areas of dentistry, from cosmetic and restorative dentistry to surgical treatments and root canal treatments.

Dr. Thi Van-Dinh, D.D.S., M.S.

Thi Van-Dinh, D.D.S., M.S., is a board certified periodontist who graduated from the University of California at Berkeley with a degree in Bioengineering. She attended dental school at New York University College of Dentistry where she graduated in the top 5% of her class, and received post-graduate training in all aspects of periodontics at the University of Maryland where she graduated at the top of her class.


She has extensive experience with traditional periodontal procedures such as open flap debridement, osseous surgery, bone grafting, crown lengthening, and scaling and root planing; implant site development including ridge and sinus augmentation; and implant placement. She especially enjoys soft tissue augmentation and root coverage coverage procedures.

In addition to working in private practice, Dr. Van-Dinh is also a Clinical Instructor in the Department of Periodontics at the University of Maryland Dental School.


Dr. Van-Dinh grew up in San Jose, California. She is married with two rescued cats (who were featured in last years MD-SPCA calendar).


Professional Memberships:

  • American Academy of Periodontics 
  • American Board of Periodontology 
  • American Dental Association 
  • Baltimore City Study Club 
  • Greater Catonsville Dental Study Club 
  • Gerald Bowers Study Club
  • Maryland State Dental Association
  • Omicron Kappa Upsilon National Dental Honor Society


Dr. Anthony B. Sims DDS, IMD, DHS, DABCP, PC

Dr. Sims has been practicing dentistry for over 37 years in Columbia, Maryland; where he also treats TMJ/movement disorder patients. He has lectured on TMJ dysfunction, its treatment, and its connection to the various movement disorders. He has lectured over the United States and internationally on the Modern Advances in TMJ Treatment.

Because of Dr. Sims’ dedication and his extensive knowledge, he has earned the degree of Diplomat in the American Academy of Craniofacial Pain. He has earned a degree as Doctor of Humanitarian Services from the World Organization of Natural Medicine. Also a degree as Integrative Medicine Doctor from the Board of Integrative Medicine, established by the World Health Organization.

Dr. Sims has published current-day articles in the Journal of Craniomandibular Practice, the Journal of Pain Medicine, and the Medical Hypothesis journal in which a new paradigm shift on the thinking of tourette’s syndrome, cervical dystonia, complex regional pain syndrome (CRPS), as it pertains to other movement disorders that are in conjunction with the TMJ/jaw relationship. 


Dr. Sims will spend time providing quality care and individualized treatment for your health needs.


Our office provides treatment for TMJ dysfunction, migraine headaches, snoring and sleep apnea, orthodontics, and cosmetic dentistry. All services are performed using the latest dental technology. Please view our service link for more information.


Dr. Sims strives to educate everyone he comes in contact with from all walks of life. He believes with wisdom comes many rewards that will add quality to a person’s life. You will encounter a warm and friendly atmosphere every time you step into the office of Dr. Sims, where you are not only welcomed but comfortable knowing that you are receiving the best possible quality care available.


Please explore our website to learn more about us. You can find information about our office through the section on video testimonials and our YouTube channel, as well as the procedures and services that we offer.


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