We present here the first in vivo optical coherence tomography (OCT) i
mages of human dental tissue. A novel dental optical coherence tomogra
phy system has been developed. This system incorporates the interferom
eter sample arm and transverse scanning optics into a handpiece that c
an be used intraorally to image human dental tissues. The average imag
ing depth of this system varied from 3 mm in hard tissues to 1.5 mm in
soft tissues. We discuss the application of this imaging system for d
entistry and illustrate the potential of our dental OCT system for dia
gnosis of periodontal disease, detection of caries, and evaluation of
dental restorations. (C)1998 Optical Society of America