Jon Lackner of Cherry Hill was sentenced Tuesday in Philadelphia by U.S. District Judge Petrese Tucker.
A jury last year found Lackner guilty of traveling from New Jersey to Pennsylvania in 2009 with the intent of having sex with a minor and of trying to email obscene photos of himself to a minor.
The minor was actually a detective in the Philadelphia suburb of Bensalem posing as a 14-year-old girl in an online chat room.
Lackner also pleaded guilty Tuesday to two additional counts of manufacturing and possessing child pornography. He admitted that he used a minor to produce sexually explicit material.
Lackner's dentistry license was suspended in 2009.
