title: Elemental ion release from fixed restorative materials into patient saliva.
abstract: The objective of this study was to quantitatively investigate the elemental ion release from the fixed gold alloy and ceramic crowns into patient saliva. Twenty patients who participated in the study were divided into two equal groups; 1) full coverage type IV gold crowns and 2) full coverage CAD-CAM-fabricated ceramic crowns. Saliva collection and clinical evaluation of marginal integrity and gingival health were performed before crowns preparation, 3 months and 6 months after crowns placement. Clinical evaluations were conducted using California Dental Association criteria. Collected saliva samples were analysed for element release using inductively coupled plasma mass spectrometer. The zinc, copper, palladium, gold and silver were released from type IV gold crowns into saliva, while the silicon and aluminium were released from ceramic crowns. A clinically significant number of subjects had increased release of zinc from baseline to three-month recall and increased silicon release from baseline to both three-month and six-month recalls. For all elements, the subjects' counts for the case of three-month recall to six-month recall were never higher than that of the case of baseline to three-month recall except for palladium. No obvious adverse effects on marginal integrity or gingival health were noticed. Significant increased releases of zinc from cast gold crowns and silicon from CAD-CAM-fabricated ceramic crowns into the saliva were evident after 3 months of clinical service.
authors: Department of Fixed Prosthodontics, Faculty of Dentistry, Tanta University, Egypt.
authors: W
authors: W
authors: Elshahawy
authors: R
authors: R
authors: Ajlouni
authors: W
authors: W
authors: James
authors: H
authors: H
authors: Abdellatif
authors: I
authors: I
authors: Watanabe
mesh_terms: D000328:Adult; D000535:Aluminum / Q000032:analysis; D000538:Aluminum Silicates / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry; D017076:Computer-Aided Design; D003300:Copper / Q000032:analysis; D003442:Crowns; D018772:Dental Marginal Adaptation; D003764:Dental Materials / Q000032:analysis*; D003776:Dental Porcelain / Q000737:chemistry; D004058:Diffusion; D005500:Follow-Up Studies; D006046:Gold / Q000032:analysis; D006047:Gold Alloys / Q000032:analysis; D006801:Humans; D010165:Palladium / Q000032:analysis; D010512:Periodontal Index; D012463:Saliva / Q000737:chemistry*; D012825:Silicon / Q000032:analysis; D012834:Silver / Q000032:analysis; D013054:Spectrophotometry, Atomic; D015032:Zinc / Q000032:analysis
chemical_list: D000538:Aluminum Silicates; D003764:Dental Materials; D006047:Gold Alloys; C075815:IPS-Empress ceramic; D003776:Dental Porcelain; D012834:Silver; D010165:Palladium; D006046:Gold; D003300:Copper; D000535:Aluminum; D015032:Zinc; D012825:Silicon