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ORIGINAL ARTICLE
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J Korean Dent Assoc. 2022;60(6):341-348. Published online May 31, 2022.
DOI: https://doi.org/10.22974/jkda.2022.60.6.002
- 캡슐형 치과용 아말감의 보관 온도에 따른 수은 증기 누출에 관한 연구
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김지은1
, 서영빈1,2
, 권재성1,2
, 김광만1
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1연세대학교 치과대학 치과생체재료공학교실
2BK21 창의치의학융합 교육연구단 -
- A study on the leakage of mercury vapor from pre-capsulated dental amalgam according to storage temperature
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Ji-Eun Kim1
, Young-Bin Seo1,2
, Jae-Sung Kwon1,2
, Kwang-Mahn Kim1
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1Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul, Korea
2BK21 FOUR Project, Yonsei University College of Dentistry -
- Corresponding author: Kwang-Mahn Kim Tel: +82-2-2228-3082, Fax: 82-2-364-9961, Email: kmkim@yuhs.ac
- Received: March 8, 2022; Revised: March 15, 2022 Accepted: March 30, 2022.
- Abstract
- Objective
The aim of this study was to measure the amount of mercury vapor from one pre-capsulated dental amalgam according to the storage temperature and to investigate whether the storage temperature suggested by the manufacturer or ISO is appropriate for the storage.
Materials and Methods
GK Amalgam and Ultracaps+ were used in this study. One pre-capsulated dental amalgam was placed in a Tedlar Bag and the Tedlar Bag was filled with 2 L of (4±2) ℃ air. The Tedler Bag was stored at one of the three different temperature conditions; (4±2) ℃, (23±2) ℃ and (30±2) ℃ for 24 hours. By applying Ontario hydro method, mercury vapor in the Tedlar Bag was oxidized in KMnO4-H2SO4 solvent and pre-treated, followed by analyses using the Cold Vapor Atomic Absorption Spectrophotometry. Five measurements were obtained from each group.
Results
The average mercury vapor from GK Amalgam was (0.068±0.024), (0.300±0.100) and (0.544±0.133) mg/m3 , and Ultracaps+ was (0.026±0.008), (0.088±0.013) and (0.146±0.023) mg/m3 at (4±2) ℃, (23±2) ℃ and (30±2), respectively. There was a significant difference between GK Amalgam and Ultracaps+ at each temperature, and depending on the storage temperature in each material (p<0.05).
Conclusions
It was evident that storage at (23±2) ℃ result in exposure of mercury vapor exceeding 340 to 1,170% of the expo-sure amount compare to the standard set by the Ministry of Labor in Korea. In order to reduce the amount of mercury vapor leaking from pre-capsulated dental amalgam, it is considered an effective method for users to periodically ventilate storage places, store them in refrigerators or keepin sealed container, and manufacturers to produce them in individual packaging.
Keywords :Amalgam; Mercury vapor; Ontario hydro method; Pre-capsulated dental amalgam
