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Tables 3-1 and 3-2 indicate exposure times that were defined based on a unit equipped with a standard cone of 20 cm (8 in.) focus-to-skin distance.
Table 3-1 Exposure Times in Seconds for Class D-Speed Films
|
70 kV - 7 mA) |
60 kV - 7 mA |
|||||
|---|---|---|---|---|---|---|
|
Maxillary |
Child |
Adult |
Adult |
Child |
Adult |
Adult |
|
Incisor/Bicuspid |
0.119 |
0.180 |
0.227 |
0.238 |
0.360 |
0.454 |
|
Premolar |
0.152 |
0.230 |
0.290 |
0.304 |
0.460 |
0.580 |
|
Molar |
0.178 |
0.270 |
0.340 |
0.356 |
0.540 |
0.680 |
|
Mandibular |
||||||
|
Incisor/Bicuspid |
0.099 |
0.150 |
0.189 |
0.198 |
0.300 |
0.378 |
|
Premolar |
0.106 |
0.160 |
0.202 |
0.211 |
0.320 |
0.403 |
|
Molar |
0.119 |
0.180 |
0.227 |
0.238 |
0.360 |
0.454 |
|
Bitewing |
||||||
|
Anterior |
0.099 |
0.150 |
0.189 |
0.198 |
0.300 |
0.378 |
|
Posterior |
0.119 |
0.180 |
0.227 |
0.238 |
0.360 |
0.454 |
|
Occlusal |
||||||
|
MaxilaryAn |
0.205 |
0.310 |
0.391 |
0.409 |
0.620 |
0.781 |
|
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