OBJECTIVE: To identify and quantify the camphorquinone (CQ) used in different brands of composite resins as a function of the shade analyzed. MATERIALS AND METHODS: Filtek Z250 A3 (FZA3), Filtek Z-250 Incisal (FZI), Pyramid Enamel A1 (PEA1), Pyramid Enamel Translucent (PET), Filtek Supreme A3E (FSA3) and Filtek Supreme GT (FSGT) were used. Five hundred milligrams of each resin were weighed and then dissolved in 1.0 ml of methanol. The samples were centrifuged to accelerate the sedimentation of the inorganic particles. 0.8 ml of the supernatant solution was collected with a pipette and assessed under gas chromatography coupled to the mass spectrometer (GC-MS). The results were compared to pure CQ solutions, used as a standard. Student's t-test, (p=0.05) significant at the level of 5%, compared the results of each brand shade. RESULTS: A smaller amount of camphorquinone was found in Filtek Z-250 (FZI) resin incisal shade when compared to (FZA3) A3 shade. On the other hand, Filtek Supreme resin featured a statistically larger camphorquinone amount in the incisal shade. In Pyramid Enamel resin camphorquinone was found only in shade A1, while the photoinitiator used in the Translucent shade was not identified. SIGNIFICANCE: Based on the data obtained, it is possible to conclude that a single composite resin brand may feature differences in amount and type of photoinitiator used.
OBJECTIVE: To identify and quantify the camphorquinone (CQ) used in different brands of composite resins as a function of the shade analyzed. MATERIALS AND METHODS: Filtek Z250 A3 (FZA3), Filtek Z-250 Incisal (FZI), Pyramid Enamel A1 (PEA1), Pyramid Enamel Translucent (PET), Filtek Supreme A3E (FSA3) and Filtek Supreme GT (FSGT) were used. Five hundred milligrams of each resin were weighed and then dissolved in 1.0 ml of methanol. The samples were centrifuged to accelerate the sedimentation of the inorganic particles. 0.8 ml of the supernatant solution was collected with a pipette and assessed under gas chromatography coupled to the mass spectrometer (GC-MS). The results were compared to pure CQ solutions, used as a standard. Student's t-test, (p=0.05) significant at the level of 5%, compared the results of each brand shade. RESULTS: A smaller amount of camphorquinone was found in Filtek Z-250 (FZI) resin incisal shade when compared to (FZA3) A3 shade. On the other hand, Filtek Supreme resin featured a statistically larger camphorquinone amount in the incisal shade. In Pyramid Enamel resin camphorquinone was found only in shade A1, while the photoinitiator used in the Translucent shade was not identified. SIGNIFICANCE: Based on the data obtained, it is possible to conclude that a single composite resin brand may feature differences in amount and type of photoinitiator used.
Authors: Qirong Chen; Franziska Schmidt; Oliver Görke; Anila Asif; Joachim Weinhold; Erfan Aghaei; Ihtesham Ur Rehman; Aleksander Gurlo; Asma Tufail Shah Journal: Biomedicines Date: 2022-02-07
Authors: Dayane Carvalho Ramos Salles de Oliveira; Eduardo José Souza-Junior; Adam Dobson; Ana Rosa Costa Correr; William Cunha Brandt; Mário Alexandre Coelho Sinhoreti Journal: J Appl Oral Sci Date: 2016 Nov-Dec Impact factor: 2.698
Authors: Dayany da Silva Alves Maciel; Arnaldo Bonfim Caires-Filho; Marta Fernandez-Garcia; Camillo Anauate-Netto; Roberta Caroline Bruschi Alonso Journal: Biomed Res Int Date: 2018-05-22 Impact factor: 3.411
Authors: Roberta Caroline Bruschi Alonso; Eduardo José Carvalho de Souza-Júnior; Diogo Dressano; Giovana Albamonte Spagnolo de Araújo; José Manuel Ces Rodriguez; Vinícius Di Hipólito; Camillo Anauate-Netto; Regina Maria Puppin-Rontani; Mario Alexandre Coelho Sinhoreti Journal: Eur J Dent Date: 2013-09