Comparison of three different bulk-filling techniques for restoring class II cavities: μCT, SEM-EDS combined analyses for margins and internal fit assessments

Putignano, Angelo; Tosco, Vincenzo; Monterubbianesi, Riccardo; Vitiello, Flavia; Gatto, Maria Laura; Furlani, Michele; Giuliani, Alessandra; Orsini, Giovanna

doi:10.1016/j.jmbbm.2021.104812

Cited by 13 publications

(9 citation statements)

References 31 publications

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“…11 In the research carried out by Putignano A. et al, 2 they compared three different restoration techniques, observing that the snow removal technique, which consists of 1) placing a thin layer of uncured fluid Bulk Fill composite as the lower lining of the cavity; 2) filling the rest of the cavity with a single increment of BFC compressible up to the occlusion surface, using high viscosity bulk composites and another low viscosity fluid, this improves adaptation to the cavity and decreases marginal microleakage. 2 Another study Tosco V. et al, 15 used micro-computerized tomography (µ-CT) and scanning electron microscopy (SEM) together with energy dispersive X-ray spectroscopy, to assess the degree of microleakage. 3 Using eight extracted human third molars and with two preparations of proximal, distal and oclussal cavities, using two filling techniques: BG (Bulk & Go group) which consists of restoring the cavity in a single increment, and BT (Traditional Bulk Group) which restores the proximal wall first and then treats it as a class I cavity.…”

Section: Resultsmentioning

confidence: 99%

Untitled

2022

JDHODT

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Currently, the most widely used dental restoration materials in the field of dental aesthetics are polymer-based composite; therefore, the offer within the market is increasing with a focus on aesthetic, mechanical, and process improvement needs. Bulk fill or block filling polymer-based composite has been widely accepted, they have an advantage because they can be placed in blocks of up to 4 to 5 mm 1 reducing clinical times in contrast to traditional polymer-based composite. Therefore, within the present study, we have focused on investigating the microleakage of this type of polymer-based composite and what are the main reasons for it.Objectives: A literature review on the evaluation of the degree of microleakage of bulk fills polymer-based composites.Methodology: An electronic literature search was performed on bibliographic bases such as PubMed, Scielo, Science Direct, Cochrane, and Wiley Online using the keywords: "marginal adaptation", "bulk fill resin", "bulk fill composite", and "microleakage".Conclusions: Block filling polymer-based composite tends to have the same amount of microleakage as conventional polymer-based composite. Adhesive systems are essential to greatly reduce the formation of gaps between dental materials and dental structures. Class II cavities will always be better to treat the proximal face first and then manage as a class I to reduce marginal microleakage. The fluid block filling polymer-based composite used as a base greatly helps the adaptation of the polymer-based composite and decreases marginal microleakage.

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Section: Resultsmentioning

confidence: 99%

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2022

JDHODT

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“… 16 This combined analysis makes it possible to obtain a proper visualisation of void formation on the tooth-restoration interface, providing reliable and objective information both on the morphology and chemical composition of the analysed samples. 17 Regarding the tooth-restoration interface, this method can be considered particularly helpful for researchers and clinicians, providing the opportunity to assess the effect of restorative procedures from different points of view, although further studies are needed to confirm the results obtained.…”

Section: Discussionmentioning

confidence: 99%

“…of defects); the total surface of defects (DS, expressed in µm 2 ); the total volume of defects (DV, expressed in µm 3 ), the specific surface, defined as the ratio between the surface and the volume of the defects (DS/DV, expressed in µm -1 ); the mean thickness of void formation (mean thickness, expressed in µm); the volume of mineralised materials (enamel and dentin) and composite (MV, expressed in µm 3 ); and the ratio of the latter value to the total volume of the defect (DV/MV, expressed as a percentage). 16 17 The CT-Analyser software (ver. 1.17.7.2, Bruker, Billerica, MA, USA) was employed to create a 3D model of the defects of interest, coloured and superimposed onto 3D reconstructions of enamel, dentin, and restorations, by CTVOL software (ver.…”

Section: Methodsmentioning

confidence: 99%

Micro-computed tomography for assessing the internal and external voids of bulk-fill composite restorations: A technical report

et al. 2022

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Purpose This technical report aims to describe and detail the use of micro-computed tomography for a reliable evaluation of the bulk-fill composite/tooth interface. Materials and Methods Bulk-fill composite restorations in tooth cavities were scanned using micro-computed tomography to obtain qualitatively and quantitatively valuable information. Two-dimensional information was processed using specific algorithms, and ultimately a 3-dimensional (3D) specimen reconstruction was generated. The 3D rendering allowed the visualization of voids inside bulk-fill composite materials and provided quantitative measurements. The 3D analysis software VG Studio MAX was used to perform image analysis and assess gap formation within the tooth-restoration interface. In particular, to evaluate internal adaptation, the Defect Analysis add-on module of VG Studio Max was used. Results The data, obtained with the processing software, highlighted the presence and the shape of gaps in different colours, representing the volume of porosity within a chromatic scale in which each colour quantitatively represents a well-defined volume. Conclusion Micro-computed tomography makes it possible to obtain several quantitative parameters, providing fundamental information on defect shape and complexity. However, this technique has the limit of not discriminating materials without radiopacity and with low or no filler content, such as dental adhesives, and hence, they are difficult to visualise through software reconstruction.

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“…But traditional periapical and panoramic films can only present 2D imaging of 3D structures. Some scholars also believe Micro-Ct of high resolution, which can show the adequate visualization of tooth internal structures ( Putignano et al, 2021 ). However, due to its high dose of radiation is not suitable for clinical practice, whereas cone-beam computed tomography (CBCT) can clearly display the 3D structures of internal tissues of the tooth, thus offering a better understanding of the anatomy of the root canal ( Venskutonis et al, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Cone-beam computed tomography study of the incidence and characteristics of the second mesiobuccal canal in maxillary permanent molars

Lin

Guan

2022

Front. Physiol.

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Objective: This study aimed to review the characteristics of the second mesiobuccal canal (MB2) in the maxillary first and second permanent molars of 500 patients to analyze the incidence of MB2 and its connection with gender, age, tooth position, and mesiobuccal (MB) root length. The study also aimed to investigate the distribution of the root canal orifice on the pulp chamber floor to obtain an imaging reference for clinical practices related to maxillary molars in Fujian, China.Methods: In accordance with the enrollment criteria, cone-beam computed tomography images of the maxillofacial area were collected from 500 patients, including 1,000 maxillary first molars and 1,000 maxillary second molars. The patients were grouped according to gender and tooth position. The incidence of MB2 was observed, and the MB root length and distribution angle of the mesiobuccal-palatal-distobuccal root canal orifices were measured for statistical analysis.Results: The overall incidence of MB2 in maxillary first and second molars was 51.1% and 32.9%, respectively. The incidence of MB2 in maxillary molars was 50% in male patients and 35.45% in female patients, with a significant difference (p < 0.05). The incidence of MB2 in maxillary molars was significantly higher in subjects aged below 50 (especially in male patients) than those aged 50 and above. The MB root length of maxillary first and second molars with MB2 was longer than that without MB2, and the difference was statistically significant. An association was identified between the incidences of MB2 in contralateral molars of the same type and in ipsilateral adjacent molars. When MB2 occurred in the MB root of maxillary molars, the root canals were mostly classified as type IV, followed by type II. The angle formed by the MB-P-DB orifices on the pulp chamber floor in the maxillary first and second molars was (25.23 ± 5.20) and (20.17 ± 10.88)°respectively.Conclusion: The incidence of MB2 in maxillary molars is high in Fujian, China. The occurrence of MB2 is affected by gender, age, and length of MB root, and it occurs symmetrically in adjacent molars and in contralateral molars of the same type. In addition, the distribution law of the main root canal orifice at the pulp chamber floor is conducive to locating MB2, thereby guiding clinical operations.

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Comparison of three different bulk-filling techniques for restoring class II cavities: μCT, SEM-EDS combined analyses for margins and internal fit assessments

Cited by 13 publications

References 31 publications

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Micro-computed tomography for assessing the internal and external voids of bulk-fill composite restorations: A technical report

Cone-beam computed tomography study of the incidence and characteristics of the second mesiobuccal canal in maxillary permanent molars

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