|Baltic Dental and Maxillofacial Journal|
2003, Vol. 5, No. 4
© 2004 Stomatologija
Stomatologija 2003; 5 (4): 149-51 163 KB
Status of Individual Dosimetry for Dentists in Lithuania
Deimante Ivanauskaite, Birute Griciene
Occupational exposure to radiation for dentists can occur as result of work with dental X-ray equipment. Since 1995 a part of dentists started to work with dental X-ray equipment in Lithuania. Individual dosimetry is performed in order to control occupational exposure and it shows the number of dentists working with dental X-ray equipment. The aim of study was to analyze number of dentists working with dental X-ray equipment and status of individual dosimetry for dentists in Lithuania in 1996 - 2001.
The ratio dentists working with dental X-ray equipment from all dentists was found. The measurements of doses for dentists were performed in Subdivision of Individual Dosimetry of Radiation Protection Centre in Vilnius, Lithuania. The “Rados” thermoluminescent dosimetry system (Finland) was used. Each dentist who was working with dental X-ray equipment got an individual dosimeter with personal number. The dose measurement period was once in three months. The operational dose quantities used for external exposure were the personal dose equivalent Hp (10), where minimum registered dose was 0.01mSv. Detailed analysis of individual doses received by dentists was performed.
The number of dentists working with dental X-ray equipment increased from 68 to 237 since 1996 to 2001. The ratio of dentists working with X-ray equipment from all dentists increased from 3.98 % to 9.07 %. A majority of dentists did not receive occupational annual recording level (1.00 mSv). The highest individual occupational annual dose for dentist was 2.7 mSv. The highest average occupational annual dose for dentists was 1.16 in 1997 and the lowest was 0.74 mSv in 1996.
In conclusion, there is small number of dentists working with dental X-ray equipment and it increased slowly in Lithuania. The annual effective doses of dentists in Lithuania in 1996 to 2001 are not exceeding approved dose limits for radiation workers.
Key words: exposure, individual dosimetry, thermoluminescent dosimeter, dentist
Address correspondence to Dr.Deimante Ivanauskaite, Institute of Stomatology Vilnius University, Zalgirio str. 115, 2042 Vilnius, Lithuania. E-mail: email@example.com
Received: 10 09 2003
Accepted for publishing: 27 11 2003