What is the maximum permissible dose (MPD) of radiation for a dental assistant?

What is the maximum permissible dose (MPD) of radiation for a dental assistant?

• A. 0.5 rem/year
• B. 5 rem/year
• C. 50 rem/year
• D. 500 rem/year

Answer: (B)

The essential idea is understanding annual dose limits for workers exposed to radiation. For someone in a dental office who is routinely exposed to x-ray equipment, the maximum permissible dose is set to protect long-term health. The standard occupational limit for whole-body exposure is 5 rem per year, which is the same as 50 millisieverts per year. This means a dental assistant should not receive more than that amount from all radiographic procedures in a single year. In practice, actual exposures are far lower thanks to shielding, proper technique, and monitoring. The other figures would exceed or misstate the typical regulatory limit, so 5 rem/year is the correct benchmark. If you’re pregnant, there are stricter fetal dose considerations, but for an occupationally exposed dental assistant overall, the annual limit is 5 rem.

The essential idea is understanding annual dose limits for workers exposed to radiation. For someone in a dental office who is routinely exposed to x-ray equipment, the maximum permissible dose is set to protect long-term health.

The standard occupational limit for whole-body exposure is 5 rem per year, which is the same as 50 millisieverts per year. This means a dental assistant should not receive more than that amount from all radiographic procedures in a single year. In practice, actual exposures are far lower thanks to shielding, proper technique, and monitoring.

The other figures would exceed or misstate the typical regulatory limit, so 5 rem/year is the correct benchmark. If you’re pregnant, there are stricter fetal dose considerations, but for an occupationally exposed dental assistant overall, the annual limit is 5 rem.