I am not sure how good of a match this is, but she is listed as having a lot of dental work and is presumed dead with the body never recovered.
http://www.doenetwork.org/cases/958dffl.html
Barbara Ann Bockwith
Missing since December 5, 1979 from Escambia County, Florida.
Classification: Endangered Missing
Vital Statistics
Date Of Birth: December 31, 1958
Age at Time of Disappearance: 20 years old
Height and Weight at Time of Disappearance: 5'4"; 115 lbs.
Distinguishing Characteristics: White female. Brown hair; blue eyes.
Dentals: Available. She has had a lot of dentistry.
Circumstances of Disappearance
Barbara Bockwith, an accounting major, left home for class at the University of West Florida but never arrived on the morning of December 5, 1979.
A friend, driving through the intersection at Creighton Road and Ninth Avenue, reported seeing Bockwith having breakfast at the McDonald's on Navy Boulevard the morning of her disappearance.
A week later, her car was found at Pensacola Regional Airport, her books inside, the driver's seat pushed all the way back.
Bockwith mentioned having problems with her boyfriend, Robert Deaver, but made no indication of threats or fear.
Five days after being questioned by investigators, Deaver was found dead. His cause of death was later determined to be the result of a suicide.
Bockwiths body was never found, however she is presumed dead and the investigation is continuing.