Leonard J. Seide, DDS, a Riverdale, NY, orthodontist, community leader, and founder of  the Conservative Synagogue Adath Israel of Riverdale, died February 12 from complications caused by Parkinson’s disease. He was 83.

According to an article from The Riverdale Press, Seide had practiced orthodontics for 45 years, treating patients in Riverdale and throughout New York.

Seide was a long-time member of the clinical faculty of New York University’s School of Dentistry and leader of the clinical dental staffs of several New York hospitals. He brought together groups of doctors from diverse dental disciplines to treat cases such as cleft palates and other birth defects, his family said.

He was the author of A Dynamic Approach to Restorative Dentistry, a textbook published in 1980. He was also a regular contributor to multiple dental journals and was a fellow of the American College of Dentistry.

Seide is survived by his wife, Shirley; his three children, David, Richard, and Susan; and his four grandchildren, Andrew, Ethan, Jake, and Malcolm. In lieu of flowers, contributions in Seide’s name can be made to any of the following charities: the Parkinson’s Disease Foundation; the Autism Society of America; or the Juvenile Diabetes Research Foundation.