This part applies to intraoral dental radiographic systems. The dental intraoral x-ray systems must meet the requirements of:
nationally recognized standards such as Code of Federal Regulations, title 21, sections 1020.31 to 1020.33;
the manufacturer's specification; or
The registrant must ensure that the safety controls in this subpart are followed.
Intraoral film holders and bite blocks must be used except when endodontic procedures do not permit.
Film must not be routinely held by hand.
The tube housing and the position-indicating device must not be hand-held during an exposure and must be stable before the exposure is initiated and during the exposure.
The exposure at the end of the cone for a posterior bitewing technique must not exceed the values listed in the table below:
|kVp||"D" Speed Film ESE (milliroentgens)||"E," D/E, or E+ Speed Film ESE (milliroentgens)|
|50||425 - 575||220 - 320|
|55||350 - 500||190 - 270|
|60||310 - 440||165 - 230|
|65||270 - 400||140 - 200|
|70||240 - 350||120 - 170|
|75||170 - 260||100 - 140|
|80||150 - 230||90 - 120|
|85||130 - 200||80 - 105|
|90||120 - 180||70 - 90|
|95||110 - 160||60 - 80|
|100||100 - 140||50 - 70|
exposures are specified as free-in-air exposures without backscatter; and
the indicated kVp is often significantly different from the actual kVp. The kVp must be tested at the time the output per film is measured to determine the correct exposure range to be applied.
The operator of the radiographic equipment must be protected and able to view the patient during the taking of any radiographs.
The requirements for half-value layer found in part 4732.0800, subpart 6, must be met.
In addition to the requirements of this part, the exposure at the end of the cone of digital dental radiographic equipment must not exceed 120 mR for a posterior bitewing.
MS s 144.12
December 10, 2007
Copyright © 2007 by the Revisor of Statutes, State of Minnesota. All rights reserved.