scholarly journals Can surface protection prevent damage in margins of composite resin restorations after simulated endogenous erosion?

2019 ◽  
Vol 18 ◽  
pp. e191462
Author(s):  
Luana Mendonça Dias ◽  
Janaina Emanuela Damasceno ◽  
Patricia Akemi Nishitani Shibasaki ◽  
Max José Pimenta Lima ◽  
Roberto Paulo Correia de Araújo ◽  
...  
Keyword(s):  
Composite Resin ◽  
Adhesive System ◽  
Negative Control ◽  
Marginal Adaptation ◽  
Glass Ionomer ◽  
Surface Protection ◽  
Resin Modified Glass Ionomer ◽  
Composite Resin Restorations ◽  
Resin Sealant ◽  
Resin Restorations

Aim: The study investigated the effect of using surface protection agents in the adaptation of external and internal margins of restorations subjected to simulated erosion. Methods: Cavities with margins in dentin were prepared in bovine incisors (n=120). Adhesive restorations were placed using a three-step etch&rinse adhesive system and nanofilled composite resin. The specimens were divided into four groups, according to the surface protection: negative control, topical application of fluoride (TAF), resin sealant and resin-modified glass ionomer varnish (RMGI varnish). Afterwards, they were divided into three sub-groups, according to the exposure to a simulated solution of gastric acid (DES) (5% HCl, pH=2,2) and subsequent remineralization (RE): negative control, 9 and 18 cycles of DES-RE. The evaluation of the tooth-restoration interface was performed on the internal and frontal images with the aid of a stereoscopic microscope (15x), and the percentage of continuous margins without adhesive failures was quantified. Results: In the external margins, only those groups with surface protection using sealants (resin and glass-ionomer) did not exhibit a significant decrease in the percentage of continuous margins after the erosive challenges. After 18 cycles of DES-RE, the use of resin-modified glass ionomer varnish resulted in the highest percentage of continuous margins. Conclusion: It was concluded that physically covering the surfaces with a sealing agent preserved the marginal adaptation of composite resin restorations exposed to endogenous erosive challenges.

scholarly journals Effect of Dental Erosion and Methods for its Control on the Marginal and Internal Adaptation of Restorations with Different Adhesive Systems

2019 ◽  
Vol 21 (5) ◽  
pp. 437-444
Author(s):  
Janaina Emanuela Damasceno ◽  
Felipe Vilasboas Rodrigues ◽  
Luana Mendonça Dias ◽  
Patricia Akemi Nishitani Shibasaki ◽  
Max José Pimenta Lima ◽  
...  
Keyword(s):  
Composite Resin ◽  
Adhesive System ◽  
Dental Erosion ◽  
Negative Control ◽  
Glass Ionomer ◽  
Protective Material ◽  
Etch And Rinse ◽  
Resin Modified Glass Ionomer ◽  
Internal Adaptation ◽  
Composite Resin Restorations

AbstractThe dentin exposed to erosive challenges is often superficially protected to prevent progression of the lesion. This study investigated the marginal and internal adaptation of composite resin restorations made on surfaces that had first been treated with different methods for controlling erosion. Cavities with margins in dentin were prepared in bovine incisors (n=360) and were divided into three groups according to the method for controlling the erosive challenge: negative control, topical application of fluoride and resin-modified glass ionomer varnish. The specimens were then randomly divided into three sub-groups according to the exposure to simulated gastric acid solution (DES) (5% HCl, pH=2.2) and subsequent remineralization (RE): negative control, 9 and 18 cycles of DES-RE. Finally, teeth were divided into four groups, depending on the bonding agent used for composite resin restoration (n=10): conventional etch-and-rinse adhesive system (2 and 3 steps) and self-etching (1 and 2 steps). Front and internal images of the interface tooth/restoration were recorded in stereoscopic microscope (15x) to quantify the percentage of adhesive failures. Despite the promising results of the resin-modified glass ionomer varnish after 9 cycles; no protective material prevented increased internal defects after 18 erosive cycles. More continuous internal margins were noted with etch-and-rinse acid systems after more intense erosion. The maintenance of internal margins in eroded substrates was positively influenced by the resin-modified glass ionomer varnish and, under the most aggressive challenge, by the use of etch-and-rinse adhesives systems. Keywords: Tooth Erosion. Dentin. Acid Gastric. ResumoA dentina exposta a desafios erosivos é muitas vezes superficialmente protegida para prevenir a progressão da lesão. Este estudo investigou a adaptação marginal e interna de restaurações de resina composta realizadas em superfícies que foram previamente tratadas com diferentes métodos para controlar a erosão. Cavidades com margens em dentina foram preparadas em dentes incisivos bovinos (n=360) e divididas em três grupos de acordo com o método de controle do desafio erosivo: controle negativo, aplicação tópica de flúor e verniz de ionômero de vidro modificado por resina. Os espécimes foram então divididos aleatoriamente em três subgrupos de acordo com a exposição à solução de ácido gástrico simulada (DES) (HCl a 5%, pH = 2,2) e posterior remineralização (RE): controle negativo, 9 e 18 ciclos de DES-RE. Por fim, os dentes foram divididos em quatro grupos, de acordo com o agente de união utilizado para a restauração da resina composta (n=10): sistema adesivo convencional (2 e 3 passos) e autocondicionante (1 e 2 passos). Imagens frontais e internas da interface dente/restauração foram registradas em microscópio estereoscópico (15x) para quantificar a porcentagem de falhas adesivas. Apesar dos resultados promissores do verniz de ionômero de vidro modificado por resina após 9 ciclos; nenhum material de proteção impediu o aumento de defeitos internos após 18 ciclos erosivos. Margens internas mais contínuas foram observadas com sistemas adesivos convencionais após erosão mais intensa. A manutenção das margens internas em substratos erodidos foi influenciada positivamente pelo verniz de ionômero de vidro modificado por resina e, sob o desafio mais agressivo, pelo uso de sistemas de adesivos convencionais. Palavras-chave: Erosão Dentária. Dentina. Ácido Gástrico.

scholarly journals Effect of erosion and methods for its control on the surface roughness of composite resin

2017 ◽  
Vol 32 (2) ◽  
pp. 88 ◽  
Author(s):  
Andrea Nóbrega Cavalcanti ◽  
Mariana Menezes Vaz de Queiroz ◽  
Patricia Akemi Nishitani Shibasaki ◽  
Max José Pimenta Lima ◽  
Richard Mark Foxton ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Topical Application ◽  
Composite Resin ◽  
Rough Surfaces ◽  
Negative Control ◽  
Fluoride Glass ◽  
Glass Ionomer ◽  
Average Roughness ◽  
Surface Protection ◽  
Resin Sealant

Objective: This study evaluated the surface roughness of a nanofilled composite resin submitted to different degrees of erosion and methods of control.Methods: 120 cylindrical composite specimens (6×1.5 mm) were randomly divided into four groups, according to the surface protection against the erosive challenge [negative control, topical application of fluoride, glass-ionomer sealant, resin sealant]. After the application of the respective method, specimens were divided into three subgroups (n=10): a) absence of erosive challenge; b) 9 cycles of DES-RE; c) 18 cycles of DES-RE. Surface roughness (Ra, μm) was recorded and statistically analyzed (2-way Anova/Tukey).Results: The glass-ionomer sealant exhibited less rough surfaces under all the conditions. However, the average roughness was significantly higher after 18 DES-RE cycles.Conclusion: Despite the potential shown by glass-ionomer sealant, it was concluded that no material prevented an increase in surface roughness of the nanofilled composite after an intense erosive challenge.

scholarly journals Water sorption and solubility of a nanofilled composite resin protected against erosive challenges

2019 ◽  
Vol 22 (1) ◽  
pp. Process
Author(s):  
Katharina Maciel Ferreira Villaça Maia ◽  
Felipe Vilasboas Rodrigues ◽  
Janaina Emanuela Damasceno ◽  
Rodrigo Vitória Da Costa Ramos ◽  
Vivian Leite Martins ◽  
...  
Keyword(s):  
Water Sorption ◽  
Control Method ◽  
Composite Resin ◽  
Resin Composite ◽  
Mass Gain ◽  
Negative Control ◽  
Dental Restoration ◽  
Glass Ionomer ◽  
Surface Protection ◽  
Resin Modified Glass Ionomer

Objective: Erosive challenges are capable of demineralizing dentin and promote physical and mechanical changes in restorative materials. The present study investigates the water sorption and solubility of one nanofilled resin composite submitted to erosive challenges. It also studies procedures that can protect these surfaces. Materials and methods: 120 specimens were used. It was divided into four experimental groups according to the type of surface protection used (negative control, topical application of fluoride, resin-modified glass ionomer varnish and resin-based sealant). Subsequently, they were randomly assigned to three subgroups (n = 10), (negative control, 9 and 18 cycles of DES-RE). According to the exposure to the simulated solution of gastric acid (DES) (5% HCl, pH = 2.2) and subsequent remineralization (RE). The specimens were dehydrated until a constant mass was obtained and immersed in distilled water for 7 days, when they were weighed and submitted to a new dehydration. The values of water sorption and solubility were calculated according to the ISO 4049: 2000 specifications and analyzed statistically (2-way ANOVA / Tukey, alpha = 5%). Results: The water sorption and solubility averages after 18 cycles of DES-RE were statistically higher than negative control. Independently of the erosive challenge received, the specimens protected with the resin-modified glass ionomer varnish presented a significant increase in the values of loss and mass gain in relation to the other groups. Conclusion: No control method presented promising surface protection capacity of composite resin against to erosive challenges.KeywordTooth erosion; Dental restoration permanent; Solubility.

Efficacy of Four Lining Materials in Sandwich Technique to Reduce Microleakage in Class II Composite Resin Restorations

2014 ◽  
Vol 39 (3) ◽  
pp. 256-263 ◽  
Author(s):  
SM Moazzami ◽  
N Sarabi ◽  
H Hajizadeh ◽  
S Majidinia ◽  
Y Li ◽  
...  
Keyword(s):  
Composite Resin ◽  
Class Ii ◽  
Repeated Measurements ◽  
Glass Ionomer ◽  
Sandwich Technique ◽  
Dye Penetration ◽  
Resin Modified Glass Ionomer ◽  
Group A ◽  
Composite Resin Restorations ◽  
Resin Restorations

SUMMARY Objectives The aim of the present study was to evaluate the effect of four different sandwich techniques on gingival microleakage of Class II direct composite resin restorations. Materials and Methods Fifty sound human premolars were selected and randomly divided into five groups (n=10). Class II box only cavities were prepared in one of the proximal surfaces of each tooth with a gingival margin located approximately 0.5 mm below the cemento-enamel junction. Group A (control) was restored incrementally with composite resin (Tetric Ceram). Groups B, C, D, and E were restored with the sandwich technique using a compomer (Compoglass F), flowable composite resin (Tetric Flow), self-cure composite resin (Degufill SC), or resin modified glass ionomer (Fuji II LC), respectively. After thermal-load cycling, the specimens were immersed in 0.5% basic fuschin for 24 hours. Dye penetration (10−1 mm) was detected using a sectioning technique. Data were analyzed with repeated measurements and Duncan test at α=0.05. Results The least amount of microleakage was detected in the incremental group (1.28 ± 0.98). The sandwich technique using resin modified glass ionomer (7.99 ± 9.57) or compomer (4.36 ± 1.78) resulted in significantly more leakage than did the sandwich technique using flowable (1.50 ± 1.97) or self-cure composite (2.26 ± 1.52). Conclusion According to the results of this study, none of the four sandwich technique composite resin restorations used in this study could reduce gingival microleakage to a greater degree than the incremental technique.

scholarly journals BULKFILL TECHNIQUES WITH INTERMEDIATE LAYER TO MARGINAL ADAPTATION RESTORATION OF CLASS II COMPOSITE RESIN

2021 ◽  
Vol 11 (1) ◽  
pp. 32
Author(s):  
Mochammad Raidjffan Zulkarnaen Tabona ◽  
Adioro Soetojo ◽  
Ira Widjiastuti
Keyword(s):  
Dental Caries ◽  
Intermediate Layer ◽  
Composite Resin ◽  
Class Ii ◽  
Base Layer ◽  
Marginal Adaptation ◽  
Layer Technique ◽  
Natural Teeth ◽  
Composite Resin Restorations ◽  
Resin Restorations

Background: Dental caries is a hard tissue disease caused by bacterial metabolic activity that causes demineralization, teeth that have caries should be filled in order to function again. One of the restorative materials closer to natural teeth is composite resin because it is the same colour as natural teeth and is easy to shape. As for the placement technique, bulkfill is also used because it is more time-efficient, and irradiation is accompanied by applying the restoration material in one batch. However, the bulkfill technique often causes micro-leakage of dental caries deposition. The intermediate layer is an intermediate layer used to prevent micro-leakage at the edges of the restoration as a base layer for restoration to create a good adaptation before applying packable composite resin. Therefore, bulkfill coating technique with the intermediate layer can reduce the risk of microleakage. Purpose: To describe the bulkfill technique with an intermediate layer against marginal adaptation with class II composite resin restorations. Review: The literature sources used in the preparation of the articles through several databases with descriptions. More journals say that micro-leakage in class II cavity deposition with the intermediate layer technique is better than the bulkfill technique because the intermediate layer technique has better bond strength than the bulkfill technique. If the Bulkfill technique is modified with the Intermediate layer technique, it can show good correlation and internal adaptation. Conclusion: Bulkfill technique with an intermediate layer against marginal adaptation with class II composite resin restorations can reduce the microleakage rate by reducing the polymerization's shrinkage strain.

A Two-year Clinical Comparison of Three Different Restorative Materials in Class II Cavities

2020 ◽  
Vol 45 (1) ◽  
pp. E32-E42 ◽  
Author(s):  
H Balkaya ◽  
S Arslan
Keyword(s):  
Composite Resin ◽  
Clinical Performance ◽  
Class Ii ◽  
High Viscosity ◽  
Glass Ionomer ◽  
Secondary Caries ◽  
Significant Difference ◽  
Composite Resin Restorations ◽  
Postoperative Sensitivity ◽  
Resin Restorations

SUMMARY Objectives: The aim of this clinical study was to evaluate the clinical performance of Class II restorations of a high-viscosity glass ionomer material, of a bulk-fill composite resin, and of a microhybrid composite resin. Methods and Materials: One hundred nine Class II restorations were performed in 54 patients using three different restorative materials: Charisma Smart Composite (CSC; a conventional composite resin), Filtek Bulk Fill Posterior Restorative (FBF; a high-viscosity bulk-fill composite), and Equia Forte Fil (EF; a high-viscosity glass ionomer). Single Bond Universal adhesive (3M ESPE, Neuss, Germany) was used for both conventional and bulk-fill composite resin restorations. The restorations were evaluated using modified US Public Health Service criteria in terms of retention, color match, marginal discoloration, anatomic form, contact point, marginal adaptation, secondary caries, postoperative sensitivity, and surface texture. The data were analyzed using the chi-square, Fisher, and McNemar tests. Results: Eighty-four restorations were evaluated at two-year recalls. There were clinically acceptable changes in composite resin restorations (FBF and CSC). In addition, no statistically significant difference was observed between the clinical performances of these materials in terms of all criteria (p>0.05). However, there was a statistically significant difference between the EF group and the FBF and CSC groups in all parameters except for marginal discoloration, secondary caries, and postoperative sensitivity (p<0.05). Conclusions: The tested bulk-fill and conventional composite resins showed acceptable clinical performance in Class II cavities. However, if EF is to be used for Class II restoration, its use should be carefully considered.

Marginal leakage in class V composite resin restorations with glass ionomer liners in vitro

1990 ◽  
Vol 63 (5) ◽  
pp. 522-525 ◽  
Author(s):  
R.S. Mathis ◽  
J.P. DeWald ◽  
C.R. Moody ◽  
J.L. Ferracane
Keyword(s):  
Composite Resin ◽  
Glass Ionomer ◽  
Class V ◽  
Composite Resin Restorations ◽  
Resin Restorations
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