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      Tooth discoloration induced by endodontic sealers and cervical limit: 1-year in vitro evaluation

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          Abstract

          This laboratory study aimed to evaluate the influence of endodontic sealer and cervical limit of root filling on the discoloration of root canal treated teeth. Bovine incisors were randomly distributed into six experimental groups and control (n=21/group), according to the endodontic sealer used [AH Plus (AP); MTA Fillapex (MF) and Sealer Plus BC (SPB)] and the cervical limit of root filling [dental cervix (DC) or 2 mm in apical direction (2mm-AD)]. Tooth discoloration (ΔE) was evaluated by a digital spectrophotometer using the CIED2000 method. Color assessments were performed immediately before (baseline), 1 week, 1, 3, 6 months, and 1 year after obturation. Data were analyzed by ANOVA and Tukey’s post-hoc tests (α=5%). Teeth filled with the three sealers showed perceptible tooth discoloration (ΔE≥2.7) in 1 week, maintaining similar values over time. There was a significant difference between MF and SPB sealers in the 2mm-AD groups. In addition, 2mm-AD groups promoted significantly lower discoloration than DC groups for AH (3 months) and SPB (1 and 3 months) sealer,s. Teeth filled with AP, MF, and SPB sealers displayed discoloration from 1 week to one year, with differences between MF and SPB sealers. A cervical limit of filling material at 2 mm from the dental cervix seems more advisable, promoting lower crown discoloration.

          Resumo

          O presente estudo laboratorial teve como objetivo avaliar a influência do cimento endodôntico e do limite cervical da obturação radicular na alteração de cor de dentes tratados endodonticamente. Incisivos bovinos foram distribuídos aleatoriamente em seis grupos experimentais e um controle (n=21/grupo), de acordo com o cimento endodôntico utilizado [AH Plus (AP); MTA Fillapex (MF) e Sealer Plus BC (SPB)] e o limite cervical da obturação [Colo dentário (CD) ou 2mm na direção apical (2mm-DA)]. A alteração de cor (ΔE) foi avaliada por um espectofotômetro digital usando o método CIED2000. As avaliações de cor foram realizadas imediatamente antes ( baseline), 1 semana, 1, 3, 6 meses e 1 ano após a obturação. Os dados foram analisados pelos testes ANOVA e post-hoc de Tuckey (α=5%). Dentes obturados com os três cimentos apresentaram alteração de cor perceptível (ΔE≥2.7) em 1 semana, mantendo valores semelhantes ao longo do tempo. Houve uma diferença significativa entre os cimentos MF e SPB nos grupos 2mm-DA. Além disso, os grupos 2mm-DA promoveram uma alteração de cor significativamente menor do que o grupos CD para os cimentos AH (3 meses) e SPB (1 e 3 meses). Os dentes obturados com os cimentos AH, MF e SPB apresentaram alteração de cor entre 1 semana a um ano, com diferenças entre os cimentos MF e SPB. O limite cervical do material obturador a 2mm do colo dentário parece mais aconselhável, promovendo menor alteração de cor da coroa dentária.

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          Most cited references38

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          The development of the CIE 2000 colour-difference formula: CIEDE2000

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            Color difference thresholds in dentistry.

            The aim of this prospective multicenter study was to determine 50:50% perceptibility threshold (PT) and 50:50% acceptability threshold (AT) of dental ceramic under simulated clinical settings.
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              Physical properties of 5 root canal sealers.

              The aim of this study was to evaluate the pH change, viscosity and other physical properties of 2 novel root canal sealers (MTA Fillapex and Endosequence BC) in comparison with 2 epoxy resin-based sealers (AH Plus and ThermaSeal), a silicone-based sealer (GuttaFlow), and a zinc oxide-eugenol-based sealer (Pulp Canal Sealer).
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                Author and article information

                Journal
                Braz Dent J
                Braz Dent J
                bdj
                Brazilian Dental Journal
                Fundação Odontológica de Ribeirão Preto
                0103-6440
                1806-4760
                22 December 2023
                Nov-Dec 2023
                : 34
                : 6
                : 30-39
                Affiliations
                [1 ] Graduate Program in Dental Science; Federal University of Santa Maria(UFSM), Santa Maria, Rio Grande do Sul, Brazil.
                [2 ] Federal University of Santa Maria(UFSM), Santa Maria, Rio Grande do Sul, Brazil.
                [3 ] Department of Restorative Dentistry/ Graduate Program in Dental Science; Federal University of Santa Maria(UFSM), Santa Maria, Rio Grande do Sul, Brazil
                [4 ] Department of Stomatology/ Graduate Program in Dental Science; Federal University of Santa Maria(UFSM), Santa Maria, Rio Grande do Sul, Brazill.
                Author notes
                Correspondence: Isabella Marian Lena, Federal University of Santa Maria, Santa Maria, RS, Brazil; Avenida Roraima, nº1000, Prédio 26F, Camobi, Santa Maria, RS, Brazil. Zip Code: 97105900, Telephone number: +55 (055) 3220-9288, E-mail: lena.isabella28@ 123456gmail.com

                The authors have no conflict of interest to declare.

                Author information
                http://orcid.org/0000-0001-6013-5378
                http://orcid.org/0000-0001-8426-6592
                http://orcid.org/0000-0002-3841-2719
                http://orcid.org/0000-0002-1734-8041
                http://orcid.org/0000-0002-4572-6142
                http://orcid.org/0000-0002-8444-2820
                Article
                10.1590/0103-6440202305552
                10742352
                38133090
                66ba3f2f-3de7-4abf-a6f2-c4f24818ba69

                This is an open-access article distributed under the terms of the Creative Commons Attribution License

                History
                : 11 May 2023
                : 31 October 2023
                Page count
                Figures: 3, Tables: 1, Equations: 1, References: 35, Pages: 10
                Categories
                Article

                endodontic sealers,calcium silicate-based sealers,tooth discoloration,spectrophotometric analysis

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