Factors affecting mercury release from dental amalgam exposed to carbamide peroxide bleaching agent
AMERICAN JOURNAL OF DENTISTRY, cilt.17, sa.5, ss.347-350, 2004 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 17 Sayı: 5
- Basım Tarihi: 2004
- Dergi Adı: AMERICAN JOURNAL OF DENTISTRY
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.347-350
- Hacettepe Üniversitesi Adresli: Evet
Özet
Purpose: To assess, in vitro, the effects of aging and surface polishing on mercury release from dental amalgams exposed to 10% carbamide peroxide at two pH levels. Methods: Samples of fresh and aged amalgam, polished and unpolished, were treated with 10% carbamide peroxide at pH 4.5 and at pH 6.5 for periods of 1, 4, 7, 10 and 13 days. At each time period, mercury concentrations in solution were measured using a cold-vapor atomic absorption mercury analyzer system and compared to control samples treated with phosphate buffer. Results: Amalgam samples exposed to 10% carbamide peroxide released significantly more mercury in solution than samples exposed to phosphate buffer controls. Mercury release was time-dependent and significantly higher in aged amalgam than in fresh amalgam (P< 0.001). Mercury release was also pH-dependent and higher in unpolished amalgam.