Newton Chang, a dentist who practiced in Montgomery County for nearly four decades, died June 8 at his home in Potomac. He was 77.

The cause was pancreatic cancer, said his son Wes Chang.

Dr. Chang opened his office in Rockville in the early 1970s and moved in the early 1980s to Potomac, where he practiced until his retirement in 2012.

Newton Chang was born in Canton, China, and settled in Seattle to attend high school. He moved to the Washington, D.C., area to attend Columbia Union College, now Washington Adventist University in Takoma Park, where he received a bachelor’s degree in zoology in 1962. He graduated from Howard University’s dental school in 1968.

Surviors include his wife of 44 years, Agnes Whang Chang of Potomac; two sons, Wilson Chang and Wes Chang, both of Potomac; a brother; and four sisters.

— Emily Langer