scholarly journals Gambaran Radiografis Restorasi Kelas II Resin Komposit Packable, Flowable dan Pasta Regular

2016 ◽  
Vol 5 (2) ◽  
pp. 62
Author(s):  
Rosalina Tjandrawinata ◽  
Lie Hanna Davita Wibowo
Keyword(s):  
Composite Resin ◽  
Resin Composite ◽  
Class Ii ◽  
Cavity Wall ◽  
Gap Formation ◽  
Group 4 ◽  
Group 2 ◽  
One Way Anova ◽  
Patient Class ◽  
Group 1

Polymerization shrinkage can make a gap formation between dental cavity wall and composite resin restorative materials. In radiographic film, the gap appears radiolucent, looks like secondary caries, or bonding material.The purpose of this study was to determineradiographic difference of class II restoration usingpackable, flowable, and regular paste compositeresin. The samples were12 free caries maxillary premolarwhich were extracted from orthodontic patient. Class II cavities were prepared as follows buco-palatal distance  3 mm, mesiodistal 2 mm, depth 3mm. Samples were divided into four groups. Group 1 were restored with regular pastecomposite resin, group 2 with  packable compositeresin, group 3with flowable and regular pastecomposite resin, while group 4 were restored with flowable and packable composite resin. After 24 hours, the sampleswere exposed by dental x-ray.The radiolucent areabetween dental cavity wall and resin composite restoration were 0.21-0.36mm. Data wereanalyzed using one way ANOVA, followed by LSD test showed that the distance formed in group 1, 3 and 4 were not different significantly, butdifferentsignificantlywith group 2. It can be concluded that there are radiographic difference of class II restoration using packable, flowable and regular pastecomposite resin.

scholarly journals Evaluation of Gingival Microleakage in Class II Composite Restorations with Different Lining Techniques: An In Vitro Study

Scientifica ◽  
2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Vedavathi Bore Gowda ◽  
B. V. Sreenivasa Murthy ◽  
Swaroop Hegde ◽  
Swapna Devarasanahalli Venkataramanaswamy ◽  
Veena Suresh Pai ◽  
...  
Keyword(s):  
Study Groups ◽  
Class Ii ◽  
Composite Liner ◽  
Flowable Composite ◽  
Composite Restorations ◽  
Group 4 ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

Aim. To compare the microleakage in class II composite restorations without a liner/with resin modified glass ionomer and flowable composite liner.Method. Forty standardized MO cavities were prepared on human permanent mandibular molars extracted for periodontal reasons and then divided into 4 groups of ten specimens. The cavity preparations were etched, rinsed, blot dried, and light cured and Adper Single Bond 2 is applied. Group 1 is restored with Filtek P60 packable composite in 2 mm oblique increments. Group 2 is precure group where 1 mm Filtek Z350 flowable liner is applied and light cured for 20 sec. Group 3 is the same as Group 2, but the liner was cocured with packable composite. In Group 4, 1 mm RMGIC, Fuji Lining LC is applied and cured for 20 sec. All the teeth were restored as in Group 1. The specimens were coated with nail varnish leaving 1 mm around the restoration, subjected to thermocycling, basic fuchsin dye penetration, sectioned mesiodistally, and observed under a stereomicroscope.Results. The mean leakage scores of the individual study groups were Group 1 (33.40), Group 2 (7.85), Group 3 (16.40), and Group 4 (24.35). Group 1 without a liner showed maximum leakage. Flowable composite liner precured was the best.

scholarly journals Maxillary anterior alignment stability in Class I and Class II malocclusions treated with or without extraction

2015 ◽  
Vol 86 (1) ◽  
pp. 3-9 ◽  
Author(s):  
Willian Juarez Granucci Guirro ◽  
Karina Maria Salvatore Freitas ◽  
Guilherme Janson ◽  
Marcos Roberto de Freitas ◽  
Camila Leite Quaglio
Keyword(s):  
Class Ii ◽  
Class I ◽  
Maxillary Incisor ◽  
Class Ii Malocclusion ◽  
Group 4 ◽  
Posttreatment Period ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

ABSTRACT Objective:  To compare the postretention stability of maxillary incisors alignment in subjects with Class I and II malocclusion treated with or without extractions. Materials and Methods:  The sample comprised 103 subjects with initial maxillary anterior irregularity greater than 3 mm and was divided into four groups: group 1 comprised 19 patients with Class I malocclusion treated with nonextraction (mean initial age = 13.06 years); group 2 comprised 19 patients with Class II malocclusion treated with nonextraction (mean initial age = 12.54 years); group 3 comprised 30 patients with Class I malocclusion treated with extractions (mean initial age = 13.16 years); group 4 comprised 35 patients with Class II malocclusion treated with extractions (mean initial age = 12.99 years). Dental casts were obtained at three different stages: pretreatment (T1), posttreatment (T2), and long-term posttreatment (T3). Maxillary incisor irregularity and arch dimensions were evaluated. Intergroup comparisons were performed by one-way analysis of variance followed by Tukey tests. Results:  In the long-term posttreatment period, relapse of maxillary crowding and arch dimensions was similar in all groups. Conclusion:  Changes in maxillary anterior alignment in Class I and Class II malocclusions treated with nonextractions and with extractions were similar in the long-term posttreatment period.

scholarly journals EFFECT OF THREE POLISHING SYSTEMS ON THE ROUGHNESS AND GLOSSINESS OF NANOCERAMIC COMPOSITE RESIN

2020 ◽  
pp. 16-18
Author(s):  
LIDYA LOLITA ◽  
ENDANG SUPRASTIWI ◽  
DEWA AYU NYOMAN PUTRI ARTINIGSIH ◽  
ANDRIA KUSWADI
Keyword(s):  
Composite Resin ◽  
Control Group ◽  
Step Method ◽  
Group 4 ◽  
One Step ◽  
Group 3 ◽  
Group 2 ◽  
Method Group ◽  
Group 1

Objective: The purpose of resin polish is to produce a restored surface that is similar to that of enamel. The objective of this study was to analyze thepolishing effect of three systems in terms of the comparative roughness or glossiness achieved with nanoceramic composite resin.Methods: Forty samples of nanoceramic composite resin were divided into four groups as follows: Group 1 was the control group, whichinvolved polymerization using Mylar strips; Group 2 involved a one-step polishing method; Group 3 involved a two-step method; and Group4 involved a four-step method. After performing these methods, the comparative roughness and glossiness of the resulting surfaces weremeasured.Results: Group 4 generated the lowest roughness value, with an almost equal value to that of the control group, which was followed by Group 3 andGroup 2. The best surface in terms of glossiness was achieved in Group 4.Conclusion: The polishing system involving the four-step method generated the lowest roughness value and the highest surface glossiness value.

scholarly journals Effect of the number of thermocycles on microleakage of resin composite restorations

2003 ◽  
Vol 17 (4) ◽  
pp. 337-341 ◽  
Author(s):  
Flávia Bittencourt Pazinatto ◽  
Bruno Barbosa Campos ◽  
Leonardo César Costa ◽  
Maria Teresa Atta
Keyword(s):  
Resin Composite ◽  
Control Group ◽  
Group 4 ◽  
Thermal Changes ◽  
Group 3 ◽  
Group 5 ◽  
Group 2 ◽  
Number Of Cycles ◽  
Group 1

Thermocycling simulates, in vitro, thermal changes that occur in the oral cavity. The aim of this study was to evaluate the influence of the number of cycles on microleakage. Class V cavities (1.5 mm deep, 3 mm in height and 3 mm in width) were prepared in bovine teeth, restored with a Single Bond/Z250 restorative system (3M/ESPE) and then divided into five groups of ten teeth each: group 1 was not thermocycled (control group), and groups 2, 3, 4 and 5 were thermocycled 500, 1,000, 2,500 and 5,000 times, respectively (5º-55º ± 2ºC, 15 s dwell time). The teeth were immersed in 0.5% basic fuchsin aqueous solution for 24 h, sectioned and the sections with the highest degree of microleakage were selected, scanned and the extent of dye penetration was measured by the ImageTool program. The results submitted to one-way ANOVA showed no significant differences between the groups (p > 0.05). The averages of microleakage values in millimeters were: group 1 (3.92); group 2 (3.13); group 3 (4.48); group 4 (4.33) and group 5 (3.42). Thus, it was concluded that there is no relation between the increase of the number of cycles and the increase in microleakage.

scholarly journals Effect of different post-cure polymerization treatment on composite resin hardness

2015 ◽  
Vol 63 (4) ◽  
pp. 426-431
Author(s):  
Ariani Rodrigues DIMER ◽  
Guilherme Anziliero AROSSI ◽  
Leonardo Haerter dos SANTOS ◽  
Diego Rafael KAPPAUN
Keyword(s):  
Composite Resin ◽  
Hardness Test ◽  
Composite Resins ◽  
Control Group ◽  
Group 4 ◽  
Significant Difference ◽  
Group 3 ◽  
Group 2 ◽  
Vickers Hardness Test ◽  
Group 1

Objective: To evaluate the influence of different additional polymerization methods on the microhardness of two direct composite resins. Methods: Direct Composite resins samples (Fill Magic and Opallis) and a Laboratory Composite Resin (Ceramage) were lightcured according to manufacturer instructions. Then, the direct resins were submitted to additional polymerization. Experimental groups were divided into (n = 5): group 1: Conventional Polymerization; group 2: Extra Light (80s); group 3: Autoclave; group 4: Laboratory Resin Ceramage. Vickers hardness test was carried out after a week of light-free storage in water, and results were subjected to ANOVA / Tukey statistical analysis. Results: Resin Lab Ceramage showed higher astatistically significant microhardness within all other resins in this study (p £ 0.05); Fill Magic showed no statistically significant difference between the groups tested compared to its control (p> 0.05); Opallis resin submitted to autoclave was the only method that showed a higher statistically significant difference compared to the control group (p £ 0.05). Conclusion: It concludes that hardness of a direct composite resin tested - Opallis - was increased by Autoclave post-cure polymerization, however, not enough to achieve the hardness of a laboratory composite. Furthermore, increasing lightcuring time does not produce a harder surface.

Influence of Cavity Preparation, Light-curing Units, and Composite Filling on Intrapulpal Temperature Increase in an In Vitro Tooth Model

2014 ◽  
Vol 39 (5) ◽  
pp. E195-E205 ◽  
Author(s):  
SH Choi ◽  
JF Roulet ◽  
SD Heintze ◽  
SH Park
Keyword(s):  
Resin Composite ◽  
The Other ◽  
Temperature Measurements ◽  
Group 4 ◽  
Light Curing ◽  
Group 3 ◽  
Group 2 ◽  
Power Densities ◽  
Group 1

SUMMARY This study examined the effect of both the tooth substance and restorative filling materials on the increase in pulp chamber temperature when using light-curing units with different power densities. The tip of a temperature sensor was positioned on the pulpal dentinal wall of the buccal side of a maxillary premolar. Metal tubes were inserted in the palatal and buccal root of the tooth, one for water inflow and the other for water outflow. Polyethylene tubes were connected from the metal tubes to a pump to control the flow rate. For the unprepared tooth group (group 1), the tooth was light-cured from the buccal side using two light-curing units (three curing modes): the VIP Junior (QTH, BISCO, Schaumburg, IL, USA) and the Bluephase LED light-curing units (two modes: LEDlow and LEDhigh; Ivoclar Vivadent, Schaan, Liechtenstein). The power densities of each light-curing unit for the LEDlow, QTH, and LEDhigh modes were 785 mW/cm2, 891 mW/cm2, and 1447 mW/cm2, respectively. All light-curing units were activated for 60 seconds. For the prepared tooth group (group 2), a Class V cavity, 4.0 mm in width by 4.0 mm in height by 1.8 mm in depth in size, was prepared on the buccal surface of the same tooth for the temperature measurement. The light-curing and temperature measurements were performed using the same methods used in group 1. The cavity prepared in group 2 was filled with a resin composite (Tetric N Ceram A3 shade, Ivoclar Vivadent) (group 3) or a flowable composite (Tetric N Flow with A3 shade, Ivoclar Vivadent) (group 4). The light-curing and temperature measurements were performed for these groups using the same methods used for the other groups. The highest intrapulpal temperature (TMAX) was measured, and a comparison was conducted between the groups using two-way analysis of variance with a post hoc Tukey test at the 95% confidence level. The TMAX values were as follows: 38.4°C (group 1), 39.0°C (group 2), 39.8°C (group 3), and 40.3°C (group 4) for the LEDlow mode. For the QTH mode, the TMAX values were 40.1°C (group 1), 40.4°C (group 2), 40.9°C (group 3), and 41.4°C (group 4). For the LEDhigh mode, the TMAX values were 43.3°C (group 1), 44.5°C (group 2), 44.7°C (group 3), and 45.3°C (group 4). The statistical analysis revealed the following: the TMAX values were arranged by mode in the following manner: LEDlow < QTH < LEDhigh (p<0.05) and group 1 < group 2 ≤ group 3 ≤ group 4 (p<0.05).

scholarly journals Influence of Implant Design (Cylindrical and Conical) in the Load Transfer Surrounding Long (13mm) and Short (7mm) Length Implants: A Photoelastic Analysis

2016 ◽  
Vol 10 (1) ◽  
pp. 522-530 ◽  
Author(s):  
Sergio Alexandre Gehrke ◽  
Victor Lourenço Frugis ◽  
Jamil Awad Shibli ◽  
Maria Piedad Ramirez Fernandez ◽  
José Eduardo Maté Sánchez de Val ◽  
...  
Keyword(s):  
Load Transfer ◽  
Axial Loading ◽  
Implant Design ◽  
Group 4 ◽  
Photoelastic Analysis ◽  
Group 3 ◽  
Group 2 ◽  
Implant Length ◽  
One Way Anova ◽  
Group 1

Purpose: This study compared the influence of implant design (cylindrical and conical) in the load transfer on bone surrounding 13mm and 7mm length implants under simulated occlusal loading, using photoelastic analysis. Method: Dental implants of 4mm diameter were divided into four groups, which varied in length and design: Group 1- standard (13 mm) cylindrical implant; Group 2 - standard conical implant; Group 3 – short (7 mm) cylindrical implant, and Group 4 - short conical implant. After the inclusion of the implant models in a photoelastic resin, they were subjected to a static load of 100 N. The lengths of the fringes that were generated were measured in three portions since the implants body: crestal, central and apical portion, parallel to the implant long axis. Furthermore, the entire extension area of dissipation of force was measured. Data were analyzed by one-way ANOVA (α = 0.05). Results: Lower stress was observed at the crestal bone in groups 2 and 4, while the stress levels in groups 1 and 3 were higher with significant differences compared to the other groups (p<0.05). Conclusion: The total amount of stress transmitted to the bone was not affected by implant length under axial loading condition, but changed in relation to the implant design with respect to the concentration of the fringes, which corresponded to the load distribution, with even more dissipation by conical implants.

The Leakage of Class II Cavities Restored with Packable Resin-Based Composites

2003 ◽  
Vol 4 (4) ◽  
pp. 1-11 ◽  
Author(s):  
Oya Bala ◽  
Mina Betül Üçtaşli ◽  
Liknur Ünlü
Keyword(s):  
Class Ii ◽  
Cavity Surface ◽  
Dental Bonding ◽  
Group 4 ◽  
Excess Water ◽  
Coated Disc ◽  
Group 3 ◽  
Group 5 ◽  
Group 2 ◽  
Group 1

Abstract Recently, new resin-based composites, called “packable” or “condensable” resin composites, are being promoted as amalgam alternatives. The purpose of this study was to evaluate leakage in Class II cavities restored with the five packable resin-based composites. On 45 freshly extracted human molars, cavities were prepared following a standardized pattern in which the Class II cavity had a length of 3.0 mm, width of 2.0 mm, and depth of 1.5 mm occlusally. The proximal box had an axial depth of 1.5 mm and a buccolingual width of 4.0 mm. The cervical margin was located 1.0 mm below the cement enamel junction (CEJ). The teeth were randomly divided into five groups of 8 each. The cavity surface was conditioned with 36% phosphoric acid, rinsed, excess water removed, and a dental bonding adhesive (Prime&Bond NT) was used for all the cavities. The teeth were then restored according to the manufacturer's instructions: Group 1, Surefil; Group 2, Solitaire; Group 3, Alert; Group 4, Filtek P60; and Group 5, Prodigy Condensable. After the restorations were completed, the specimens were finished and polished with an aluminum-oxide-coated disc, thermocycled, stained, sectioned, and viewed under a stereomicroscope for leakage at occlusal/enamel and gingival/dentin margins. All test groups showed that leakage of gingival/dentin margins were greater when compared with leakage of occlusal/enamel margins. At the occlusal/enamel margins, there were no significant differences between the materials; however, at gingival/dentin margins, Filtek P60 and Prodigy Condensable demonstrated less leakage, while Solitaire demonstrated greater leakage. Citation Bala O, Üçtasli MB, Ünlü I. The Leakage of Class II Cavities Restored with Packable Resin-Based Composites. J Contemp Dent Pract 2003 November;(4)4:001-011.

scholarly journals The Effects of Various Restorative Techniques on the Fracture Resistance of Pulpotomized Permanent Premolars

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Yasamin Ghahramani ◽  
Fereshteh Shafiei ◽  
Zahra Jowkar ◽  
Sepideh Kazemian
Keyword(s):  
Fracture Resistance ◽  
Composite Resin ◽  
Mineral Trioxide Aggregate ◽  
Class Ii ◽  
Fracture Pattern ◽  
The Other ◽  
Cem Cement ◽  
Maxillary Premolars ◽  
Group 2 ◽  
Group 1

Aim. This study aimed to evaluate the effects of various restorative techniques on the fracture resistance of pulpotomized premolars with mesioocclusodistal (MOD) cavities treated with mineral trioxide aggregate (MTA) or calcium enriched mixture (CEM) cement. Materials and Methods. One hundred and eight sound extracted maxillary premolars were randomly assigned to nine experimental groups (n = 12). The teeth in group 1 did not receive any preparation. Class II MOD cavities were prepared in the other experimental groups. In groups 2, 4, 6, and 8, tooth-colored MTA was used for pulpotomy. In groups 3, 5, 7, and 9, CEM cement was used for pulpotomy. Groups 2 and 3 were left unrestored. Groups 4 and 5 were restored with amalgam. Groups 6 and 7 were restored with a conventional composite resin, and groups 8 and 9 were restored with bulk-fill giomers. Fracture resistance was measured, the fracture pattern of each specimen was assessed, and the results were statistically analyzed. Results. The fracture resistance of group 1 was significantly higher than those of the other groups ( p < 0.05 ). The fracture resistance of group 2 (MTA + amalgam) was statistically lower than those of all experimental groups ( p values < 0.05) except groups 3, 4, and 5 ( p values > 0.05). No statistically significant differences were found between the groups restored with amalgam, conventional composite resin, and bulk-fill giomer (groups 4, 5, 6, 7, 8, and 9) ( p values < 0.05). The highest rate of mode 1 fracture (restorable fracture) was observed in group 1 followed by groups 8 and 9. Conclusion. No significant differences were found among the fracture resistances of the restored teeth using various restorative techniques. Bulk-fill giomers followed by conventional composite resin were better able to prevent unfavorable fractures compared to amalgam. Therefore, they seem to be more reliable for the restoration of pulpotomized teeth with MOD cavities.

scholarly journals Effect of Reinforcement on the Fracture Resistance of Endodontically Treated Molars by Various Bonded Restorations-An In Vitro Study

2015 ◽  
Vol 03 (02) ◽  
pp. 103-111
Author(s):  
Jaidev Dhillon ◽  
Sachin Passi ◽  
Ajay Chhabra ◽  
◽  
Keyword(s):  
Fracture Resistance ◽  
Resin Composite ◽  
Testing Machine ◽  
In Vitro Study ◽  
Group 4 ◽  
Significant Difference ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

Abstract Objective: To compare and evaluate the fracture resistance of endodontically treated molars reinforced with various bonded restorations and to study the type of fractures in various restorations. Methods: Forty extracted mandibular molars were endodontically treated. MOD (Mesio-Occluso-Distal) cavities were prepared and Mesio-Buccal cusp was reduced in all to provide cuspal coverage. All the teeth were then divided into 4 groups. The cavities in group 1(control) were filled with high copper amalgam. Group 2 was restored with direct resin composite. In group 3 after the priming and bonding procedures as in group 2, cavity surfaces were coated with flowable resin composite. Before curing a piece of polyethylene ribbon fiber was cut and coated with adhesive resin and was embedded inside the flowable composite. The resin composite was cured with visible light cure (VLC) gun. For group 4, restorations were done according to the recommendations provided by the manufacturers of SR Adoro (Ivoclar-Vivadent, Schaan, Liechtenstein) composite material. Compressive fracture strength test was performed after at least 24 hours of the fabrication of the specimens, by application of compressive loading in a Universal testing machine, applied on the occlusal aspect of each specimen with a steel bar. The mean loads necessary to fracture were recorded in Newton and the results were statistically analyzed. Results: Group 4 (indirect composite inlay) had the greater fracture resistance and group 1(Amalgam) had the poorest. Difference between group 1 and 3, group 1 and 4, group 2 and 4 were statistically significant. No statistically significant difference was found between group 1 and 2, group 2 and 3, group 3 and 4. Predominant type of fracture in group 1 and 3 was fracture of tooth below cemento enamel junction at tooth restoration interface without mesio buccal cusp involvement. In group 2 and 4, predominant fractures were of tooth below cemento enamel junction through center of restoration without mesio–buccal cusp involvement.

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