Radiopacity of endodontic materials using two models for conversion to millimeters of aluminum

Ochoa-Rodríguez, Victor Manuel; Visbal, Jorge Homero Wilches; Roma, Barbara; Coaguila‐Llerena, Hernán; Tanomaru‐Filho, Mário; Gonçalves, Andréa; Spin‐Neto, Rubens; Faria, Gisele

doi:10.1590/1807-3107bor-2020.vol34.0080

Cited by 6 publications

(6 citation statements)

References 23 publications

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“…Despite having the same radiopacifier, BD and BCR exhibited different radiopacity in both experimental time periods, which is probably related to the percentage of zirconium oxide. Previous studies have revealed low radiopacity for BD (Farrugia et al, 2018; Ochoa‐Rodrıguez et al, 2019; Ochoa‐Rodriguez et al, 2020). However, it is not possible to make comparisons between different radiopacity studies because several factors may interfere with the results, such as the X‐ray machine, exposure time, tube voltage, source‐to‐object distance, conventional radiography and digital radiography systems (Ochoa‐Rodrıguez et al, 2019; Ochoa‐Rodriguez et al, 2020).…”

Section: Discussionmentioning

confidence: 94%

“…In the present study, the null hypothesis was rejected, as significant differences were found between the calcium silicate‐based materials in most of the evaluated parameters. Although previous studies have evaluated BD using similar methodologies (Adl et al, 2019; Farrugia et al, 2018; Marconyak et al, 2015; Ochoa‐Rodrıguez et al, 2019; Ochoa‐Rodriguez et al, 2020; Oliveira et al, 2020; Shokouhinejad et al, 2016; Vallés et al, 2015; Yoldas et al, 2016), few studies have used BCT (Guerreiro et al, 2021; Oliveira et al, 2020; Villa et al, 2020) and BCR (Benetti et al, 2019; Ghilotti et al, 2020; López‐García et al, 2019), which are new ready‐to‐use materials. To assess crown discolouration by these materials in the presence of blood components, a model was designed to simulate the clinical situation of partial pulpotomy.…”

Section: Discussionmentioning

confidence: 99%

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Biological parameters, discolouration and radiopacity of calcium silicate‐based materials in a simulated model of partial pulpotomy

et al. 2021

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Aim To analyse the discolouration, radiopacity, pH and calcium ion release of Biodentine (BD), Bio‐C repair (BCR) and Bio‐C temp (BCT), as well as their biological effects on human dental pulp cells (hDPCs). Methodology Sixty‐four extracted bovine incisors were prepared to simulate crown fractures with pulp exposure and open root apex. The roots were filled using a mixture of agar and blood (control), and BD, BCR or BCT were placed over this mixture. Colour assessment analyses of the samples were performed before and immediately after material insertion and repeated at 30 and 90 days, using a spectrophotometer. The colour change of each specimen was evaluated at the crown and calculated based on the CIELab colour space. Digital radiographs were acquired for radiopacity analysis. hDPCs were placed in contact with different dilutions of culture media previously exposed to such materials and tested for cell viability using the MTT assay. The pH and calcium ion release of all materials were measured after 24 h; the data were assessed using one‐way analysis of variance (ANOVA). Cell viability was analysed by two‐way ANOVA. Differences in colour parameters and wound‐healing data were assessed by two‐way repeated measures ANOVA (α = 0.05). Tukey's and Dunnett's tests were used to compare the experimental groups with the control group. Results BCR had grater radiopacity and smaller colour alteration (ΔEab/ΔE00) than the other materials tested (p < .005; p < .001). No significant differences in pH were found amongst the tested materials (p > .05). BCT was associated with the largest release of calcium ions (p < .0001). BD had cell viability similar to that of the control at the lowest dilutions, and BCR was similar to that of the control, regardless of the dilution tested (p > .05). BCT had a lower percentage of viability than that of the control at all tested dilutions (p < .0001). Cell migration rates in BD and BCR were similar to those in the control group after 24 h and 48 h (p > .05), whilst BCT had larger voids than the control in both periods (p < .0001). Conclusions BCR, BCT and BD were associated with tooth discolouration. BCR had the lowest staining values, the highest radiopacity and viability greater than 80% hDPCs.

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Biological parameters, discolouration and radiopacity of calcium silicate‐based materials in a simulated model of partial pulpotomy

et al. 2021

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“…Furthermore, it was reported that it is sufficient to convert the pixel values to equivalent millimeters of aluminum. Besides, digital radiography systems generally showed the lowest radiopacity variability of the methodologies compared with the photo densitometer used in conventional radiographs 20 . The radiographic images with digital systems were not influenced by exposure time due to the broad latitude of the phosphor plate.…”

Section: Discussionmentioning

confidence: 96%

Comparative radiopacity of pediatric dental restorative materials

Kuter¹,

Uzel²

2022

Balkan J Dent Med

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Background/Aim: Radiopacity of dental restorative materials is significant to detect secondary caries, overhangs, and voids. This study aimed to evaluate whether radiopacity of dental restorative materials used in pediatric dentistry was sufficient. Material and Methods: Specimens of 2 mm thickness and 4 mm diameter were prepared in the plastic molds. Six composite materials, one compomer material, and one conventional glass ionomer cement were used and three specimens of each material were prepared. Three radiographs were taken from dental restorative materials and aluminum step wedge. Digital images obtained were recorded. Mean gray values of the dental restorative materials and aluminum step wedge were measured on digital radiographs. Results: All composite resins displayed higher radiopacity values than an equal thickness of 2 mm Al. Posterior composite (201.62±1.99 MGV) showed higher radiopacity value than the anterior composite (86.19 ±1.45 MGV). There was no significant difference in radiopacity values of different shades of the same composite. There was no significant difference in radiopacity values between glass ionomer cement and compomer. Glass ionomer cement showed higher radiopacity value (8.11 mm Al) than anterior composite (5.31 mm Al). Conclusions: Radiopacity values of dental materials used in this study were sufficient. Both resin materials and the glass ionomer cement had sufficient radiopacity values. Posterior composite showed the highest radiopacity value. Radiopacity values were not affected by different shades.

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“…Hem ANSI/ADA 7 hem de ISO 6 standartlarına göre 1 mm kalınlığındaki endodontik siman, en az 3 milimetre alüminyuma (mmAl) eşdeğer bir radyoopasiteye sahip olmalıdır. 8 Standart protokole göre alüminyum penetrometre ile ışınlanmış D hızında okluzal film kullanılması, röntgen cihazının voltajının 65±5 kVp olması ve röntgen cihazının objeye mesafesinin 30 cm olması gerektiği bildirilmiştir. 9 Dental materyallerin radyoopasitesi, geleneksel radyografların sayısallaştırılmış görüntüleri kullanılarak indirekt teknik 10,11 veya dijital radyografi ile direkt teknik kullanılarak değerlendirilmektedir.…”

Section: Dijital Radyografiunclassified

BIOfactor MTA’nın Radyoopasitesinin Dijital Radyografi ile Değerlendirilmesi

Mutlu

Akbulut

2022

Selcuk Dental Journal

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Amaç: İdeal bir kök kanal materyali, kemik ve diş gibi anatomik yapılardan ve diğer dental materyallerden ayırt edilmesine izin verecek kadar yeterli seviyede radyoopak olmalıdır. Bu çalışmada Angelus MTA, Biodentine ve yeni bir kalsiyum silikat esaslı materyal olan BIOfactor MTA’nın radyoopasitesi alüminyum basamaklı blok yöntemi kullanılarak değerlendirilmiştir. Gereç ve Yöntemler: Kalsiyum silikat esaslı materyaller olan Angelus MTA, Biodentine ve BIOfactor MTA üretici firmanın talimatları doğrultusunda karıştırıldı ve standart bir teflon kalıba yerleştirildi. Başlangıç sertleşmelerini tamamlayan materyaller kalıptan çıkarılarak 37°C'de, %95 nemli ortamda 48 saat inkübe edildi. Her gruptan alınan birer numune ve saf alüminyumdan yapılan oniki basamaklı merdiven şeklindeki blok, fosfor plak üzerine yerleştirilerek radyografisi çekildi. Dijital görüntüler bir yazılım kullanılarak bilgisayara aktarıldı. Numunelerin radyografik yoğunlukları Image J programı kullanılarak belirlendi ve değerler bir denklem kullanılarak milimetre alüminyum (mmAl)’a dönüştürüldü. İstatistiksel analiz için One-way ANOVA ve post-hoc Tukey testleri yapıldı. Bulgular: Ortalama radyoopasite değerleri Angelus MTA’nın 3.66, Biodentin’in 2.43 ve BIOfactor MTA’nın 4.41 mmAl idi. Sonuç: Biodentine en düşük radyoopasite değerini gösterirken, BIOfactor MTA en yüksek radyoopasite değerini gösterdi. Angelus MTA ve yeni bir materyal olan BIOfactor MTA’nın radyoopasitesi standarta uygundu.

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Radiopacity of endodontic materials using two models for conversion to millimeters of aluminum

Abstract: Barbara ROMA (a) Hernán COAGUILA-LLERENA (a) Mário TANOMARU-FILHO (a) Andréa GONÇALVES (c) Rubens SPIN-NETO (d) Gisele FARIA (a)

Cited by 6 publications

References 23 publications

Biological parameters, discolouration and radiopacity of calcium silicate‐based materials in a simulated model of partial pulpotomy

Biological parameters, discolouration and radiopacity of calcium silicate‐based materials in a simulated model of partial pulpotomy

Comparative radiopacity of pediatric dental restorative materials

BIOfactor MTA’nın Radyoopasitesinin Dijital Radyografi ile Değerlendirilmesi

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