Detection of in vitro proximal caries in storage phosphor plate radiographs scanned with different resolutions.
OBJECTIVE
To investigate the effect of the scanning resolution of storage phosphor plate (SPP) radiographs on the detection of proximal caries lesions.


METHODS
10 dentists evaluated 72 proximal surfaces of premolars with respect to caries from SPP radiographs scanned with theoretical spatial resolutions of: (1) the Digora FMX at 7.8 lp mm(-1); (2) the Digora Optime at both 7.8 lp mm(-1) and 12.5 lp mm(-1); and (3) the Dürr VistaScan at 10 lp mm(-1) and 20 lp mm(-1), respectively. The lesions were validated by histological examination. Receiver operating characteristic (ROC) analysis was employed.


RESULTS
The A(z) value for the radiographs scanned with the Dürr VistaScan at 10 lp mm(-1) is significantly lower than those for the other series of radiographs (P = 0.000).


CONCLUSIONS
For SPP radiographs, an increased theoretical spatial resolution per se is not related to an improved detection of proximal caries.
Li
G
G
Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Hai Dian District, Beijing, PR China. gangvanli@yahoo.com
Berkhout
W E R
WE
Sanderink
G C H
GC
Martins
M
M
van der Stelt
P F
PF