Microscopic Comparison of the effect of Three Polishing Systems on a Nanofiller Composite Resin (original) (raw)
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International journal of clinical pediatric dentistry
The continuous development of esthetically acceptable adhesive restorative material has made a variety of tooth-colored materials available for clinical use. The advent of visible light polymerizing resin and the use of finer filler particles permit resin composites to be polished to higher degree. The effect of polishing systems on surface finish has been reported to be material-dependent, and the effectiveness of these systems was mostly product-dependent. Hence, the purpose of this study was to evaluate the efficiency of finishing and polishing systems on the surface roughness of nanofilled, microfilled, and hybrid composite restorative materials available in the market. Yadav RD, Raisingani D, Jindal D, Mathur R. A Comparative Analysis of Different Finishing and Polishing Devices on Nanofilled, Microfilled, and Hybrid Composite: A Scanning Electron Microscopy and Profilometric Study. Int J Clin Pediatr Dent 2016;9(3):201-208.
EFFECT OF THREE POLISHING SYSTEMS ON THE ROUGHNESS AND GLOSSINESS OF NANOCERAMIC COMPOSITE RESIN
International Journal of Applied Pharmaceutics, 2020
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 the polishing 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, which involved polymerization using Mylar strips; Group 2 involved a one-step polishing method; Group 3 involved a two-step method; and Group 4 involved a four-step method. After performing these methods, the comparative roughness and glossiness of the resulting surfaces were measured. 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 and Group 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.
Egyptian Dental Journal
Objective: To evaluate the effect of one-step, two-step, and multi-step polishing systems on the surface roughness of nanofilled and suprananofilled resin composite materials. Materials and Methods: A total of 56 resin composite discs were prepared (divided into 2 main groups of 28 discs each, as nanofilled and suprananofilled resin composite groups, using split Teflon mold and cured against Mylar celluloid strip. Except for control group, samples were ground with wet 600-grit silicon carbide paper, and then subdivided into 3 groups (n = 7) in each main group, as multi-step, two-step, and one-step polishing systems. Each polishing protocol was done according to manufacturer's instructions using a kitchen scale to maintain pressure of each stroke approximately 30-40 gm. Scanning electron microscope was used to scan all samples, and the images were subjected to Gwyddion 2.56, (An SPM data visualization and analysis tool supported by the Czech Metrology Institute, 2020) to attain surface roughness average data, which were statistically analysed by two-way ANOVA followed by Tukey's post hoc test. Results: The suprananofill groups as well as the one-step polisher groups had the least statistically significant surface roughness average values (p<0.001). Whereas the multi-step polisher groups had the highest statistically significant surface roughness average values followed by the two-step polisher, then the control groups (p<0.001). Conclusion: The one-step polishing system produces the smoothest surface, even smoother than setting against matrices, whereas polishing pastes produces the roughest surface. The suprananofill resin composite can obtain a smoother surface than the nanofill resin composite.
Effect of Different Polishing Systems on Properties of Contemporary Composite Resins
Egyptian Dental Journal
Objectives: This study aimed to evaluate the effects of different polishing systems on the surface roughness and surface micro-hardness of three types of composites. Materials and Methods: One hundred and eighty samples were prepared in disc-shaped stainless steel molds with a uniform size of 6 mm in diameter and 4 mm in thickness. The samples were divided according to the materials used into three groups of 60 samples for each material, and each group was then subdivided into subgroups according to the polishing instruments with 20 samples in each subgroup: Group I (control group) (Mylar's strip) with no finishing and polishing. Group II, polishing with Spiral polishing wheels and Group III, polishing with Sof-lex Pop-on discs. Each subgroup was divided into two groups according to measurements of surface roughness and microhardness (n=10). Restorative materials were handled according to the manufacturers' instructions. The molds were placed on flat glass plates covered with Mylar's strips and then were filled with restorative materials. The materials were covered with Mylar's strips, and a glass slide was pressed against the mold to adapt the materials completely to the inner portions of the molds. The excess material was removed, and the samples were photo-activated for 40 sec at the top surface using high intensity Elipar TM LED light curing unit, all samples were light cured following the manufacturers' instructions. The specimens' surfaces in groups II and III were finished with an ultrafine diamond finishing. After finishing the group II specimens were polished using Spiral polishing wheel. Group III specimens were polished using Sof-Lex Pop-on discs, strictly following the manufacturer's instructions. All of the groups were stored in saline for 24 hr. All of the specimens were equally subdivided for both the surface roughness and micro-hardness test. The data were analyzed using one-way ANOVA at a significance level of 0.05 for both the surface roughness and microhardness tests, followed by Tukey,s post hoc test, using SAS software. Results: Comparing between the three polishing techniques, the Mylar's strips (control group) exhibited significantly lower roughness values (smoothest surface) than the polishing systems (p <0.0001). Nanocomposite had the lowest surface roughness comparing to other materials. Comparing between the three materials, the greatest microhardness mean value was recorded with Sonic bulkfill, using Mylar's strips or Spiral wheel or Solfex disc polishing techniques(p <0.0001).
IP Innovative Publication Pvt. Ltd., 2016
Background: The aims of this study were to evaluate the effectiveness of three finishing and polishing systems on the surface of nanofilled composite, and to evaluate the effect of the surface sealant application (prime & bond) on the surface roughness after finishing and polishing procedures of tested composite. Material and Method: A total of 30 composite discs of dimension 6 x 3 mm (6mm in diameter x 3mm in thickness) were made using a custom made stainless steel mould and then randomly divided into 3 subgroups for finishing and polishing by three different methods; Sof-Lex, Shofu and Mylar strip. The average surface roughness (Ra, µm) of all specimens was measured with aprofilometer. A surface sealant was then applied to all the treated specimens, according to manufacturer's instructions and the average roughness was measured again. Result: Statistically significant difference was observed in surface roughness values before and after sealant application when finished and polished with shofu system. The lowest roughness values, before and after sealant application, was obtained when cured under a Mylar strip and the highest values were obtained when treated with Shofu. Conclusion: The Mylar strips gave lowest Ra values followed by Sof-Lex followed by Shofu and the surface sealant improved the surface texture of tested specimens drastically.
JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH, 2020
The study was approved by Institutional Ethical Committee on December 7 th 2017 (Letter number-BVDUMC and H/Sangli IEC/ Dissertation 2017-18/251) and duration was about 8 months in the calendar year 2019. In this study, a nanofilled composite resin (Filtek Z350 XT {Universal Restorative, 3M ESPE St.Paul, MN, USA}) and three polishing systems (Sof-Lex XT {3M do Brasil Ltda. Sumare, SP, Brasil}, Enhance and PoGo {DENTSPLY Caulk}, KerrHawe and OptiDisc {Kerr, Switzerland}) were used. The sample size was determined from data obtained from previous research by Scheibe KG et al. (2009), journal of applied sciences and using Gpower 3.0.10 [11]. Sample size estimation: Input: Tail(s)=Two Effect size d=1.1206301 α err prob=0.05 Power (1-β err prob)=0.95 Allocation ratio N2/N1=1 Output: Noncentrality parameter=3.716710 Critical t=2.018082 df=42 Sample size per group=22 Total sample size (3x22)=66 Preparation of Specimens Sixty six acrylic resin (DPI RR cold cure, Mumbai) blocks measuring 2 cm in diameter and 2 cm in height were prepared from plastic mould. Circular cavity measuring 8 mm in diameter and 3 mm in depth was prepared in each acrylic resin block using high speed airotor (>2,00,000 rpm) with round and straight fissure burs. Dimensions
Egyptian Dental Journal
Aim: to evaluate the effect of different polishing methods on the surface roughness (Ra) of two scalpel finished resin composites. Materials and Methods: Seventy two resin composite discs were prepared and cured against Mylar strip and divided into two groups (n=36) according to type of resin composite material, Group A1 (nano filled) and Group A2 (nano hybrid). Except for the control group (B0), samples were finished with scalpel blade, then divided into 5 subgroups (n=6) according to the polishing method, subgroup B1 (scalpel finished only and not followed by polishing), subgroup B2 (Sof-Lex Extra Thin Polishing discs), subgroup B3 (Sof-Lex Spiral wheels), subgroup B4 (Sof-Lex polishing strips) and subgroup B5 (polishing paste and brush). Samples were scanned using SEM, scans were analyzed by Gwyddion 2.59 Image Analysis Software to attain surface roughness average Ra data, which were statistically analyzed by two-way ANOVA and Turkey Post Hoc test. Results: There was a significant interaction between the resin composite material and the polishing protocol. Nano hybrid A2 had a significantly higher value than nano filled A1. And between the different finishing and polishing methods, there was a significant difference between different groups. The highest value was found in B1, followed by B4, then B2, B0 and B5, while the lowest value was found in B3. Conclusion: Scalpel is a good finishing tool for resin composite to produce a smoother micro surface ready for polishing. Nano filled resin composite produces a smoother surface than nano hybrid resin composite with different polishing methods.
2012
The objective of this in vitro study was to evaluate the surface roughness and micro-hardness of three novel resin composites containing nanoparticles after polishing with one-step and conventional multi-step polishing systems. A total of 126 specimens (10 X 2 mm) were prepared in a metal mold using three nano-composites (Filtek Supreme XT, Ceram-X, and Grandio), 21 specimens of each resin composite for both tests (n=63 for each test). Following light curing, seven specimens from each group received no polishing treatment and served as controls for both tests. The specimens were randomly polished using PoGo and Sof-Lex systems for 30 seconds after being wet-ground with 1200-grit silicon carbide paper. The mean surface roughness of each polished specimen was determined with a profilometer. The microhardness was determined using a Vickers hardness measuring instrument with a 200-g load and 15 seconds dwell time. The data were analyzed using the Kruskal-Wallis test and the post hoc Dun...
The purpose of the study was to evaluate the effect of autoclaving one-step polishing systems on the surface roughness of a nanoparticle resin composite. Sixty disk-shaped specimens were fabricated (ø 12 mm and 2.5 mm height) with Tetric N-Ceram (IvoclarVivadent). Thirty discs were polished with brushes (Astrobrush, IvoclarVivadent)and the other 30 discs with rubber tips (Optrapol, Ivoclar Vivadent). The specimens were divided into 6 groups (n = 10), according to the association between polishing system and number of autoclave cycles: G1, Astrobrush used for first time and without autoclave (control); G2, Astrobrush used after the 10th autoclave cycle; G3, Astrobrush used after the 20th autoclave cycle; G4, Optrapol used for first time and without autoclave (control); G5, Optrapol used after the 10th autoclave cycle; G6, Optrapol used after the 20th autoclave cycle. The surface roughness (R a) of each specimen and the data was used for analysis of variance (ANOVA). There was no sign...
Journal of dentistry, 2018
The aim of this study was to evaluate theeffects of different finishing and polishing techniques on the surface roughness of microhybrid and nanofilled resin composites. The resin composites included were Filtek Z250 (a universal microhybrid resin composite) and Filtek Supreme XTE (a universal nanofill resin composite). Ninety cylindrical-shaped specimens were prepared for each composite resin material. The polishing methods used included tungsten carbide bur (TC); diamond bur (Db); Sof-Lex discs (S); Enhance PoGo discs (PG); TC + S; Db + S; TC + PG; Db + PG. Polymerisation against a Mylar strip without finishing and polishing acted as the control group. Surface roughness was measured using a 3D contact optical profilometer and surface morphology was examined by scanning electron microscope examination. The results showed that the Mylar-formed surfaces were smoothest for both composites. Finishing with the 20 μm diamond finishing bur caused significantly greater surface irregularity...