Utilizing Light Cure Units: A Concise Narrative Review

Hasanain, Fatin A; Nassar, Hani M.

doi:10.3390/polym13101596

Cited by 8 publications

(6 citation statements)

References 77 publications

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“…In the case of the two horizontal layer restorations, after each layer, the remaining material was stored in a light-proof box to ensure that the light in the room would not affect the results. Only artificial light was used to increase the durability of environmental effects in the experimental laboratory [ 14 ].…”

Section: Discussionmentioning

confidence: 99%

New Perspectives in Overcoming Bulk-Fill Composite Polymerization Shrinkage: The Impact of Curing Mode and Layering

Bardocz-Veres,

Miklós,

Biró

et al. 2024

Dentistry Journal

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Background: The purpose of this study was to investigate the effect of different light curing modes on the polymerization shrinkage of a bulk-fill composite and to evaluate the impact of two layering techniques on the cuspal deflection. Methods: Nine different light curing modes were tested on bulk-fill composite samples in aluminum MOD cavities. Intensity, duration, and illumination distance were the factors that changed during the different curing modes. The digital image correlation method was used to visually represent the displacement of carbon particles on the materials’ surface caused by shrinkage along both the horizontal and vertical axes. For simulating cuspal deflection, a separate protocol was used, with a bulk and horizontal layering technique. Results: The results showed that the largest horizontal displacements were present in the soft start group (6.00 ± 0.82 µm) and in the X-tra power group (5.67 ± 1.21 µm). The smallest horizontal displacements were detected in normal curing modes (4.00 ± 1.58 µm; 4.00 ± 2.68 µm). The largest vertical displacements, at the bottom layer, were present in the normal curing mode group with a 20 s curing time (5.22 ± 1.56 µm), while the smallest vertical displacements were shown in the X-tra power group (2.89 ± 0.60 µm). The observed particle displacements showing the shrinkage of the composite were correlated with the curing mode. The bulk-fill group showed less cuspal deflection than the horizontal layering group did, but the difference was not statistically significant (p = 0.575). Conclusions: Within the limitations of this in vitro study, it can be concluded that lower intensities of curing lights (1200 mW/cm2) may perform better from the point of view of material shrinkage than high and extreme light intensities do. The pulse delay mode might be recommended in the case of bulk-fill materials. The number of layers did not significantly affect the cuspal deflection in the case of the studied composite.

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Section: Discussionmentioning

confidence: 99%

New Perspectives in Overcoming Bulk-Fill Composite Polymerization Shrinkage: The Impact of Curing Mode and Layering

Bardocz-Veres,

Miklós,

Biró

et al. 2024

Dentistry Journal

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“…Composite resin restorations have increased considerably in popularity and predictability mainly due to improvements in terms of resin composition as the evolution of adhesive systems and light curing units [17][18][19] . The advances in physical and mechanical properties of composites are reflected in their clinical performance, providing the execution of esthetic, functional and excellent longevity in anterior restorations 8 .…”

Section: Discussionmentioning

confidence: 99%

Aesthetic Resolution of Enamel Hypomineralization in Single Central Incisor: a Case Report

Miranda¹,

Silva²,

Veloso³

et al. 2022

J. Health Scie.

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Enamel development defects are important complaints of patients, being common in both primary and permanent dentition. This study aims to report a clinical case involving the aesthetic resolution of a permanent maxillary central incisor affected by enamel hypomineralization in a juvenile patient, through the direct restorative technique in a clinical-academic setting. A 16-year-old male patient attended the Clinic School of a college in the north of the state of Minas Gerais complaining of discomfort due to a white spot on the central incisor. In the dental clinical evaluation, a large opaque white spot was observed on tooth 21. The enamel had normal thickness and no surface alteration was observed, consistent with enamel hypomineralization. The decision of the appropriate treatment was taken after the transillumination exam, carried out with the photo-activator device, verifying that the spot was deep. Thus, the treatment option was the restoration with composite resin. The procedure was performed using the stratified technique, using enamel, dentin and effect resins, obtaining an excellent aesthetic result with a wear restricted to the staining area. It may be concluded that a correct diagnostic approach is extremely important for the selection of the appropriate therapy for enamel developmental defects. Composite resin becomes a material of choice when the wear is necessary. Composites have good optical properties and allow less wear compared to dental ceramics. Keywords: Esthetics, Dental. Composite Resins. Tooth Demineralization. ResumoOs defeitos de desenvolvimento de esmalte se apresentam como queixas importantes dos pacientes, sendo comuns tanto na dentição decídua quanto na permanente. O objetivo deste trabalho é relatar um caso clínico que envolve resolução estética de um incisivo central superior permanente afetado por hipomineralização de esmalte em paciente juvenil, através da técnica restauradora direta em ambiente clínico acadêmico. Paciente do sexo masculino, 16 anos de idade, compareceu à Clínica Escola de uma faculdade no norte do estado de Minas Gerais queixando incômodo devido a uma mancha branca em um incisivo central. Na avaliação clínica odontológica observou-se um manchamento branco opaco de grande extensão no dente 21. O esmalte encontrava-se com espessura normal e sem nenhuma alteração superficial, sugerindo ser uma hipomineralização do esmalte. A decisão do tratamento apropriado para o caso então foi tomada mediante um exame de transiluminação, realizado com o próprio aparelho fotoativador, constatando-se que a mancha era profunda, sendo escolhido como terapêutica o desgaste da área de manchamento com posterior restauração em resina composta. O procedimento foi realizado pela técnica estratificada, através de resina de esmalte, dentina e efeito, obtendo-se ao final um resultado estético satisfatório com um desgaste restrito a área de manchamento. Conclui-se que a correta abordagem diagnóstica é de extrema importância para a seleção da terapêutica adequada para os defeitos de desenvolvimento de esmalte. A resina composta torna-se um material de escolha quando há a necessidade de desgaste devido as suas propriedades ópticas interessantes e possibilidade de menor desgaste quando comparado as cerâmicas odontológicas. Palavras-chave: Estética Dentária. Resinas Compostas. Desmineralização do Dente

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“…Despite the high success rates for posterior teeth [4,6,28,29], failure in composite restorations might occur, and proximal gingival margins of class II restorations are at especially high risk of the development of secondary caries [30,31]. The material used and its application, as well as the process of light-curing, remains highly operator-dependent and have been shown to have a major impact on the longevity and quality of composite restorations [4][5][6][32][33][34].…”

Section: Discussionmentioning

confidence: 99%

Real-Time Feedback of the Applied Light-Curing Technique and Its Impact on Degree of Conversion of Composite Restorations—A Study with Undergraduate Dental Students

Burrer

Par

Attin

et al. 2021

JPM

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The objective of this study was to investigate the effect of individual instructions and training of dental students on the amount of applied light irradiance before and after training using a patient simulator with integrated visual feedback. Furthermore, the effect on the degree of conversion of composite restorations placed by the dental students was assessed. Forty-two dental students, split into two groups, light-cured a simulated restoration in tooth 27 of a dental patient simulator for 20 s. The irradiance (mW/cm2) received by the detector was measured in real-time before and after individual instructions and training, and the energy delivered (J/cm2) was calculated for each student. The degree of conversion at the bottom of incrementally placed composite restorations prior to individual instructions (group 1) and after individual instructions (group 2) was assessed using Fourier-transform infrared (FTIR) spectroscopy. The irradiance and degree of conversion measurements were re-assessed after all students received individual instructions. Data were analyzed using Wilcoxon signed-rank test and Mann–Whitney U-test at an overall level of significance of ⍺ = 0.05. A significant increase (p < 0.001) in applied light irradiance could be observed after individual instructions for both groups, with notably reduced data scattering. However, no significant difference was detected for the degree of conversion of placed composite restorations before or after instruction and training. Neither gender nor age of the dental students affected the obtained results. Consistent light energy delivered by dental students could be achieved through individual instructions and training with a patient simulator, also leading to less scattered irradiance results. However, the improved light-curing performance after the training did not affect the degree of conversion of the placed class II composite restorations.

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Utilizing Light Cure Units: A Concise Narrative Review

Cited by 8 publications

References 77 publications

New Perspectives in Overcoming Bulk-Fill Composite Polymerization Shrinkage: The Impact of Curing Mode and Layering

New Perspectives in Overcoming Bulk-Fill Composite Polymerization Shrinkage: The Impact of Curing Mode and Layering

Aesthetic Resolution of Enamel Hypomineralization in Single Central Incisor: a Case Report

Real-Time Feedback of the Applied Light-Curing Technique and Its Impact on Degree of Conversion of Composite Restorations—A Study with Undergraduate Dental Students

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