scholarly journals Clinical evaluation of fiber-reinforced composite crowns in pulp-treated primary molars: 12-month results

2016 ◽  
Vol 10 (04) ◽  
pp. 522-528 ◽  
Author(s):  
Zahra Mohammadzadeh ◽  
Iman Parisay ◽  
Maryam Mehrabkhani ◽  
Azam Sadat Madani ◽  
Fatemeh Mazhari
Keyword(s):  
Retention Rate ◽  
United States Public Health ◽  
Retention Rates ◽  
Fiber Reinforced ◽  
Secondary Caries ◽  
Fiber Reinforced Composite ◽  
Marginal Integrity ◽  
Reinforced Composite ◽  
Gingival Health ◽  
Significant Difference

ABSTRACT Objective: The aim of this study was to evaluate the clinical performance of tooth-colored fiber-reinforced composite (FRC) crowns in pulp-treated second primary mandibular teeth. Materials and Methods: This split-mouth randomized, clinical trial performed on 67 children between 3 and 6 years with two primary mandibular second molars requiring pulp treatment. After pulp therapy, the teeth were randomly assigned to stainless steel crown (SSC) or FRC crown groups. Modified United States Public Health Service criteria were used to evaluate marginal integrity, marginal discoloration, and secondary caries in FRC crowns at intervals of 3, 6, and 12 months. Retention rate and gingival health were also compared between the two groups. The data were analyzed using Friedman, Cochran, and McNemar's tests at a significance level of 0.05. Results: Intact marginal integrity in FRC crowns at 3, 6, and 12 months were 93.2%, 94.8%, and 94.2%, respectively. Marginal discoloration and secondary caries were not found at any of the FRC crowns. The retention rates of the FRC crowns were 100%, 98.3%, and 89.7% at 3, 6 and 12 months, respectively, whereas all the SSCs were found to be present and intact after 12 months (P = 0.016). There was no statistically significant difference between the two groups in gingival health. Conclusion: According to the results of this study, it seems that when esthetics is a concern, in cooperative patients with good oral hygiene, FRC crowns can be considered as a valuable procedure.

scholarly journals Preliminary Clinical Evaluation of Short Fiber-Reinforced Composite Resin in Posterior Teeth: 12-Months Report

2012 ◽  
Vol 6 (1) ◽  
pp. 41-45 ◽  
Author(s):  
S Garoushi ◽  
J Tanner ◽  
PK Vallittu ◽  
L Lassila
Keyword(s):  
Composite Resin ◽  
Clinical Performance ◽  
High Stress ◽  
Short Fiber ◽  
X Rays ◽  
Fiber Reinforced ◽  
Secondary Caries ◽  
Posterior Teeth ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

This preliminary clinical trial evaluated 12 month clinical performance of novel filling composite resin system which combines short fiber-reinforced composite resin and conventional particulate filler composite resin in high stress bearing applications. A total of 37 class I and II restorations (compound and complex type) were placed in 6 premolars and 31 molars. The restorations were reviewed clinically at 6 months (baseline) and 12 months using modified USPHS codes change criteria for marginal adaptation, post-operative sensitivity, pulpal pain and secondary caries criteria. Photographs and x-rays were obtained for restorative analysis. Results of 12 months evaluation showed 5 restorations having little marginal leakage (B score) and 1 patient had minor pulpal symptom and post-operative sensitivity (B score). No secondary caries or bulk fracture was detected. The majority of restorations exhibited A scores of the evaluated criteria. After 12 months, restorations combining base of short fiber reinforced composite resin as substructure and surface layer of hybrid composite resin displayed promising performance in high load bearing areas.

scholarly journals A vivo study on dowel crown with more aesthetic and healthy Fiber Reinforced Composite post system

2012 ◽  
Vol 9 (1) ◽  
pp. 15-18
Author(s):  
Hasibul Hasan ◽  
Kasi Hasinur Rahman ◽  
Shamim Sultana ◽  
Md Mahfuzur Rahman ◽  
Md Shasul Alam
Keyword(s):  
Statistical Significance ◽  
Core Material ◽  
Fiber Reinforced ◽  
Core System ◽  
Promising Alternative ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Significant Difference ◽  
Group B ◽  
Carious Teeth

Statement of problem. Patients having grossly carious teeth with broken down crown are needed to be restored with post & core after endodontic treatment. Root canal posts are widely used & come in a variety of metals & forms. However, cast metal posts, although better than other post & core systems, still possess some disadvantages, like corrosion & discoloration at the gingival margin of the treated tooth & cause aesthetic problem. These problems are overcome with the recently introduced post & core material. The fiber reinforced composite post & core material is a superior & efficient alternative to cast post. Purpose. The purpose of this study was to investigate the success of fiber reinforced composite post & core system over conventional metallic system in regards of corrosion & discoloration resistance with periodontal condition on post treated tooth. Materials & Methods. This was a prospective study, conducted in the department of Conservative Dentistry & Endodontics, B.S.M.M.U. 40 patients were purposively selected who attended in this department with grossly carious teeth with badly broken crown without apical infection as the subject of this study & divided in two groups. 20 patients were included in group A as case subjects & they were treated with fiber reinforced post & core system. 20 patients were included in group B as control subjects. They were treated with conventional cast metallic post & core system. After twelve months, recorded data were compiled on a master chart and statistically analyzed. Chisquare test and t-test (unpaired) were done for statistical significance (P<0.05). Results. Very highly significant difference (p<.001) was observed between the groups in the evaluation of resistance to corrosion & discoloration, there were no significant difference (p>.05) in periodontal evaluation Conclusion. This study revealed that fiber reinforced composite post & core system can overcome the problems faced by the metallic post & core system. So it can be concluded that fiber reinforced composite post & core system can be a promising alternative in comparison to metallic post & core system.DOI: http://dx.doi.org/10.3329/cdcj.v9i1.11832 City Dental College Journal Vol.9(1) 2012 15-18

scholarly journals Composite Resin Core Buildups With and Without Post for the Restoration of Endodontically Treated Molars Without Ferrule

2016 ◽  
Vol 41 (1) ◽  
pp. 64-75 ◽  
Author(s):  
P Magne ◽  
J Goldberg ◽  
D Edelhoff ◽  
J-F Güth
Keyword(s):  
Glass Ceramic ◽  
Composite Resin ◽  
Published Data ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Resin Core ◽  
Significant Difference ◽  
Ceramic Crowns ◽  
Dual Curing

SUMMARY Objective The aim of this study was to investigate the restoration of highly damaged, broken-down endodontically treated molars without the ferrule effect using glass ceramic crowns on different dual-cure composite resin core buildups. Methods and Materials Thirty (N=30, n=15) decoronated, endodontically treated teeth (no ferrule) were restored without a ferrule with a direct buildup using the dual-curing composite Multicore HB (group MHB) or the dual-curing composite core buildup Multicore Flow in combination with glass-fiber–reinforced composite post (FRC post; group MFP). All teeth were prepared to receive bonded glass ceramic crowns (Empress CAD luted with Variolink II) and were subjected to accelerated fatigue testing. Cyclic isometric loading was applied to the palatal cusp at an angle of 30 degrees and a frequency of 5 Hz, beginning with a load of 200 N (×5000 cycles), followed by stages of 400, 600, 800, 1000, 1200, and 1400 N at a maximum of 30,000 cycles each. Specimens were loaded until failure or to a maximum of 185,000 cycles. Groups were compared using the life table survival analysis (log rank test at p=0.05). Average fracture loads and number of survived cycles were compared with one-way analysis of variance (Scheffé post hoc at p=0.05). Previously published data from the same authors about core buildups made of high-performance polymers (group HPP, n=15) and light-curing composite resin without FRC posts (group TEC, n=15) and with FRC posts (group TECP, n=15) using the same experimental setup were included for comparison. Results None of the tested specimen withstood all 185,000 load cycles. There was no significant difference in mean fracture load (p=0.376), survived cycles (p=0.422), and survival (p=0.613) between MHB (facture load 859.4 N±194.92) and MFP (796.13 N±156.34). Group HPP from a previous study appeared to have significantly higher performance than all other groups except MHB. All groups with posts were affected by an initial failure phenomenon (wide gap at the margin between the buildup/crown assembly and the root). Conclusions HPP and MHB enhanced the performance of all-ceramic leucite-reinforced glass ceramic crowns, and insertion of a fiber-reinforced composite post was not influential when using other materials.

scholarly journals Ex Vivo Assessment of Natural Teeth Wear against Zirconia and Novel Glass-Fiber-Reinforced Composite Crowns in Primary Teeth by a Three-Dimensional Assessment Method

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Abhinav Talekar ◽  
Gayatri Chaudhari ◽  
Sreekanth Kumar Mallineni ◽  
Sneha Kothare ◽  
Amol Patil ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Glass Fiber ◽  
Primary Teeth ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Glass Fiber Reinforced ◽  
Study Results ◽  
Significant Difference ◽  
Natural Teeth

Objectives. The main purpose of the study was to assess the material wear, antagonistic natural primary teeth wear, and microhardness of zirconia (ZR), a recently launched novel glass-fiber-reinforced composite crown (GFRC). The research question was, are these aesthetic crowns resulting in antagonistic natural primary tooth wear and the crown material itself? Methods. Forty-five primary canines were divided into three groups (15 per group) and mounted against Zr (Group A), GFRC (Group B), and natural teeth as control (Group C) in the wear test machine. All samples were assessed for surface wear with pre- and post-3-dimensional scanning. In addition, microhardness was assessed for all three groups. Results. The mean microhardness value for the Zr disc was 1157 ± 7 HV; for the GFRC disc, it was 29.35 ± 2 HV; while with natural teeth, it was 105 ± 4 HV. There was a statistically significant difference in teeth wear in the prescan and postscan in the natural tooth ( p < 0.05 ) group, highly significant difference ( p < 0.001 ) in the ZR group, and no significant difference in the GFRC group. Conclusion. There is more significant wear loss of glass-fiber-reinforced composite discs as compared to zirconia. In addition, the wear of the antagonistic tooth with zirconia and natural teeth is more remarkable than with GFRC. There is a vast difference of microhardness between natural teeth and zirconia (almost 10 times higher) which suggests further scope of study. Clinical Relevance. Pediatric dentistry deals with the transition of dentition from primary to permanent through mixed dentition. Selection of restorative material needs to be done cautiously when we are dealing with primary teeth and young permanent teeth as antagonistic teeth. Wear of the crown material itself and opposing natural teeth are essential factors that should be considered in selecting crowns in clinical practice. The present study results can be extrapolated to clinical practice, and the practitioner can consider various factors in selecting full-coverage crowns for primary teeth. The vast difference in aesthetic crowns and natural teeth microhardness indicates a further need for research. Additionally, there is no literature published for the recently launched GFRCs.

scholarly journals Does Multi-Fiber-Reinforced Composite-Post Influence the Filling Ability and the Bond Strength in Root Canal?

2021 ◽  
Vol 8 (12) ◽  
pp. 195
Author(s):  
Naji Kharouf ◽  
Salvatore Sauro ◽  
Hamdi Jmal ◽  
Ammar Eid ◽  
Mohamed Karrout ◽  
...  
Keyword(s):  
Bond Strength ◽  
Root Canal ◽  
Testing Machine ◽  
Single Fiber ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Filling Ability ◽  
Significant Difference ◽  
Push Out

The purpose of the present in vitro study was to investigate the bond strength of root canal dentin and the filling ability of a new multi-fiber-reinforced composite post (mFRC) compared to a conventional single fiber-reinforced-composite post (sFRC). Twenty-eight freshly maxillary first permanent single-rooted premolars were instrumented and divided into groups (n = 14). Group 1: single-fiber-reinforced composite (sFRC), group 2: multi-fiber-reinforced composite (mFRC). Bonding procedures were performed using a dual-cure universal adhesive system and resin cement. All specimens were sectioned so that seven discs of 1 mm of thickness were obtained from each root. An optical microscope was used before the push-out test to measure the total area of the voids and to determine the length of the smaller/bigger circumferences. The push-out bond strength (PBS) test was performed using an Instron universal testing machine. Data were then compared by one-way ANOVA on ranks (α = 0.05). The dentin–cement–post interface was observed using scanning electron microscopy (SEM). At the coronal third, a significantly higher bond strength (p < 0.05) was obtained in the sFRC group (44.7 ± 13.1 MPa) compared to the mFRC group (37.2 ± 9.2 MPa). No significant difference was detected between the groups at the middle third (sFRC group “33.7 ± 12.5 MPa” and mFRC group “32.6 ± 12.4 MPa”) (p > 0.05). Voids were significantly lower in the mFRC compared to those observed in the sFRC group (p < 0.05) at the coronal third. Whereas, no significant difference was found at the middle third (p > 0.05) between the tested groups. Filling ability was overall improved when employing mFRC, although such technique might have characteristic limitations concerning the bond strength to dentin.

scholarly journals The Interference of the Cleaning Procedure of Root Walls with Two Different Solvents on the Adhesion of Fiberglass Intraradicular Posts

2012 ◽  
Vol 13 (3) ◽  
pp. 275-279 ◽  
Author(s):  
Monica Fatima Gomes ◽  
Sergio Brossi Botta ◽  
Adriana Bona Matos ◽  
Narciso Garone-Netto
Keyword(s):  
Bond Strength ◽  
Root Canal ◽  
Zinc Phosphate ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Cleaning Procedure ◽  
Pull Out ◽  
Gutta Percha ◽  
Reinforced Composite ◽  
Significant Difference

ABSTRACT Aim This study was undertaken to examine the effect of root canal (RT) sealers content and the cleaning procedure of RT walls on bond strength (BS) of a fiber reinforced composite (FRC) post cemented with resin-based or zinc phosphate cement. Materials and methods Forty bovine roots were divided into 2 groups (n = 20) and obturated with gutta-percha points plus Sealer 26 sealer or gutta-percha points plus N-Rickert sealer. In each group, half (n = 10) of intracanal walls was cleaned with ethanol and the other half with sulfuric ether. In each of these subgroups, half of intracanal posts (n = 5) were cemented with Bistite resin-based cement and half with zinc phosphate cement. Specimens were submitted to pull-out test and tensile force until post dislodgement. The maximum forces required for post removal was expressed in MPa, means were submitted to statistical analysis (Analysis of Variance Test, α = 0.05). Results Fiber reinforced composite cemented with zinc phosphate were significantly more retentive than those cemented with Bistite (p < 0.05). Regarding the influence of eugenol-based sealer on post retention, there was a statistically significant difference (p < 0.05) only between groups cemented with Bistite, in which canals filled with N-Rickert + gutta-percha showed lower BS than canals filled with Sealer 26 + gutta-percha. Conclusion Despite endodontic cement used, higher pull-out bond strength were obtained when posts were cemented with zinc phosphate. Clinical significance The importance of ethanol or sulphuric ether application to properly replace water from intraradicular dentine still requires further investigations, especially to clarify if this technique may reduce the effect of aging and improve the stability of the bond, when used to cement fiber posts into the root canal. How to cite this article Gomes MF, Botta SB, Matos AB, Garone- Netto N. The Interference of the Cleaning Procedure of Root Walls with Two Different Solvents on the Adhesion of Fiberglass Intraradicular Posts. J Contemp Dent Pract 2012;13(3):275-279.

scholarly journals Mechanical properties of fiber-reinforced composite resin exposed to alcoholic beverage

2020 ◽  
Vol 28 ◽  
pp. 02005
Author(s):  
Siti Sunarintyas ◽  
Cheah Yi ◽  
Purwanto Agustiono
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Alcoholic Beverage ◽  
Alcoholic Beverages ◽  
Fiber Reinforced ◽  
Dental Resin ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Polyethylene Fiber ◽  
Significant Difference

Addition of fiber to dental bridgework was thought to be more efficient comparing to porcelain-fused to metalwork. In other side, some patients consumed alcoholic beverage in their daily life. This study aimed to determine mechanical properties of fiber-reinforced composite (FRC) exposed to alcoholic beverage. The materials used were dental resin (i-FLOW i-dental, Lithuania), polyethylene fiber (Vactrise, USA), and 4 alcoholic beverages. FRC samples (40) were divided into 10 groups (n=4, control:aquades). Each Sample was soaked in beverage for 5 s followed by 5 s in aquades for each cycle (10 cycles daily for 4 wk). Mechanical properties were examined for hardness and flexural strength. The result showed the mean values for hardness (KHN) were: 98.70±6.03 (aquades), 99.01±4.92 (Beer), 87.65±7.83 (Vermouth), 80.23±5.22 (Rum), 78.20±3.70 (Tequila); while for flexural strength (MPa) were: 336.00±25.05 (aquades), 308.25±10.39 (Beer), 215.07±34.86 (Vermouth), 194.89±27.69 (Rum), 175.48±33.58 (Tequila). The ANOVA revealed significant differences in hardness and flexural strength (p<0.05). The LSD showed no significant difference in hardness and flexural strength of FRC soaked in aquades and Beer, while for other groups and aquades the differences were significant. In conclusion, FRCs soaked in different concentration of alcoholic beverages affected the decrease of hardness and flexural strength properties.

Mathematical Model of the Effective Properties of a Fiber Reinforced Composite with a Linearly Graded Transition Zone

2010 ◽  
Vol 38 (4) ◽  
pp. 286-307
Author(s):  
Carey F. Childers
Keyword(s):  
Mathematical Model ◽  
Transition Zone ◽  
Effective Properties ◽  
Local Stress ◽  
Stress And Strain ◽  
Fiber Reinforced ◽  
Strain Fields ◽  
Shear Moduli ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

Abstract Tires are fabricated using single ply fiber reinforced composite materials, which consist of a set of aligned stiff fibers of steel material embedded in a softer matrix of rubber material. The main goal is to develop a mathematical model to determine the local stress and strain fields for this isotropic fiber and matrix separated by a linearly graded transition zone. This model will then yield expressions for the internal stress and strain fields surrounding a single fiber. The fields will be obtained when radial, axial, and shear loads are applied. The composite is then homogenized to determine its effective mechanical properties—elastic moduli, Poisson ratios, and shear moduli. The model allows for analysis of how composites interact in order to design composites which gain full advantage of their properties.

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