scholarly journals A novel insertion design of fiber materials for the adhesive reattachment in vertically fractured teeth

PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0258534
Author(s):  
Safa Kurnaz ◽  
Ayşe Diljin Keçeci
Keyword(s):  
Glass Fiber ◽  
Fracture Strength ◽  
Ex Vivo ◽  
Fracture Load ◽  
Fiber Bundles ◽  
Strengthening Effect ◽  
Quartz Fiber ◽  
Fiber Post ◽  
Control Groups ◽  
Significant Difference

Objective This ex vivo study aimed to evaluate the strengthening effect of different ferrule and reattachment designs with fiber and adhesive materials on vertically fractured teeth. Methods Ninety extracted single-root premolars were instrumented and divided into nine groups (two control groups and seven experimental groups; n = 10). The negative control (NC) group comprised of intact teeth, while the positive control (PC) group comprised of root canal-treated teeth. The roots of the teeth in the experimental groups were vertically fractured into two equal fragments. The fragments were reattached with one of the followings: 4-methacryloxyethyl trimellitate anhydride/methacrylate-tri-n-butyl borane (4-META/MMA-TBB) resin, 4-META/MMA-TBB + quartz fiber post, 4-META/MMA-TBB + glass fiber bundles, 4-META/MMA-TBB + quartz fiber post + 1 mm ferrule, 4-META/MMA-TBB + glass fiber bundles + 1 mm ferrule, 4-META/MMA-TBB + quartz fiber post + 2 mm ferrule, and 4-META/MMA-TBB + glass fiber bundles + 2 mm ferrule. The core build-ups were made with composite resin. The specimens were subjected to compressive loading until failure occurred. Mean load necessary to fracture each sample and the fracture types of these samples were recorded. Results The highest mean fracture load was recorded in the NC group (1,036.7 N), which was not significantly higher than the PC group (989.66 N) (p > 0.05). The roots reattached with quartz fiber post demonstrated significantly less fracture strength (871.9 N) as compared to the other test and control groups (p < 0.05). There was no significant difference between the PC group and reattached fragments with different ferrule designs in terms of fracture resistance (p > 0.05). Conclusions The customized fiber bundles may be more suitable for reattachment of vertically fractured teeth than the rigid fiber posts. For reattachment procedures, the ferrule design may be preferred to increase the fracture strength of vertically fractured teeth.

scholarly journals Effect of Glass Fiber Post Adaptation on Push-Out Bond Strength to Root Dentin

2019 ◽  
Vol 30 (4) ◽  
pp. 350-355 ◽  
Author(s):  
Thiago Lopes de Freitas ◽  
Rafael Pino Vitti ◽  
Milton Edson Miranda ◽  
William Cunha Brandt
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Root Canal ◽  
Failure Modes ◽  
Resin Cement ◽  
Adhesive Failure ◽  
Fiber Post ◽  
Significant Difference ◽  
Glass Fiber Post ◽  
Push Out

Abstract The aim of this study was to evaluate the effect of different glass fiber posts (GFPs) diameters on the push-out bond strength to dentin. Forty unirradicular human teeth were endodontically treated and used for cementation of GFPs (White Post DC, FGM) with different diameters (n=10): P1 - ø 1.6 mm coronal x 0.85 mm apical; P2 - ø 1.8 mm coronal x 1.05 mm apical; P5 - ø 1.4 mm coronal x 0.65 mm apical; and PC - customized post number 0.5 with composite resin (Tetric Ceram A2, Ivoclair Vivadent). All GFPs were cemented into the root canal using a dual-curing luting composite (Variolink II, Ivoclar Vivadent). One slice (1.7 mm) of each root third of cemented GFP (cervical, middle, and apical) was submitted to push-out testing. Failure modes of all specimens were classified as: adhesive failure between resin cement and post; adhesive failure between dentin and resin cement; cohesive failure within resin cement, post or dentin; and mixed failure. The data were analyzed with two-way ANOVA and Tukey’s test (a=0.05). The highest bond strength values were presented for the P2 and PC groups. There was no statistically significant difference between the GFP thirds in each group. The groups P2, P5, and PC showed predominantly adhesive failure. For P1, the most prevalent type of failure was adhesive between resin cement and post. It may be concluded that a glass fiber post that is well adapted to the root canal presents higher bond strength values, regardless of GFP third.

Comparison of Different Post Systems for Fracture Resistance: An in vitro Study

2017 ◽  
Vol 18 (3) ◽  
pp. 205-208 ◽  
Author(s):  
Suneel V Vadavadagi ◽  
Kiran M Dhananjaya ◽  
Rashmi P Yadahalli ◽  
M Lahari ◽  
Shilpa R Shetty ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Carbon Fiber ◽  
Glass Fiber ◽  
Fracture Resistance ◽  
Quartz Fiber ◽  
Fiber Post ◽  
Tooth Structure ◽  
Fiber Posts ◽  
Glass Fiber Post

ABSTRACT Introduction Endodontic restoration becomes a challenging task for the clinician because of severe loss of coronal tooth structure owing to trauma, caries, restorative, and endodontic procedures. The restoration of these teeth requires the use of a post and core as individual units or as abutment supports for fixed or removable restorations in a predictable long-term manner. Aim To compare and assess the compressive bond strength of glass, quartz, and carbon fiber posts restored with porcelainfused- to-metal (PFM) crown. Materials and methods A total of 45 upper central incisor teeth having straight root canals, similar anatomically root segments, and fully developed apices were selected. Teeth were divided into three groups of 15 teeth after endodontic treatment. Group I: Teeth inserted with the prefabricated glass fiber post. Group II: Teeth inserted with the quartz fiber post. Group III: Teeth inserted with carbon fiber post. The posts were placed and core was fabricated using composite restoration followed by PFM crown cementation using adhesive resin. Compressive load required to fracture the tooth was measured using a universal loading machine. The difference between the variables was assessed by one-way analysis of variance, followed by Tukey's post hoc test. Results The compressive strength exhibited by carbon fiber posts was highest with a mean of 668.33 ± 26.397, followed by quartz fiber post (635.80 ± 30.390). Least compressive strength was exhibited by glass fiber post (567.53 ± 26.632). An analysis of variance shows statistically highly significant difference (p < 0.005) among the posts used. Conclusion This study concluded that the carbon fiber posts had higher compressive strength than other quartz, glass fiber posts. Clinical significance Endodontic treatment results in loss of a significant part of the tooth structure. Posts restore these teeth and provide retention. How to cite this article Vadavadagi SV, Dhananjaya KM, Yadahalli RP, Lahari M, Shetty SR, Bhavana BL. Comparison of Different Post Systems for Fracture Resistance: An in vitro Study. J Contemp Dent Pract 2017;18(3):205-208.

scholarly journals Effects of Heat Treating Silane and Different Etching Techniques on Glass Fiber Post Push-out Bond Strength

2014 ◽  
Vol 39 (5) ◽  
pp. E217-E224 ◽  
Author(s):  
P Samimi ◽  
V Mortazavi ◽  
F Salamat
Keyword(s):  
Heat Treatment ◽  
Hydrogen Peroxide ◽  
Bond Strength ◽  
Glass Fiber ◽  
Control Group ◽  
Fiber Post ◽  
Fiber Posts ◽  
Heat Treated ◽  
Significant Difference ◽  
Push Out

SUMMARY The aims of this study were to compare two pretreatment methods of a fiber post and to evaluate the effect of heat treatment to applied silane on the push-out bond strength for different levels of root. In this in vitro study, 40 glass fiber posts were divided into five groups (n=8) according to the kind of surface treatment applied. They were then inserted into extracted and endodontically treated human canines using a self-etch resin cement (Panavia F2.0, Kuraray, Japan). Group HF+S = hydrofluoric acid (HF) etching and silane (S) application; group HF+S+WP = HF etching and heat-treated silane application and warmed posts (WP); group H2O2+S = hydrogen peroxide etching and silane application; group H2O2+S+WP = hydrogen peroxide and heat-treated-silane application and warmed post; and group C, the control group, received no pretreatment. After completion of thermal cycling (1000 cycles, 5-55°C), all specimens were cut horizontally to obtain three sections. Each section was subjected to a push-out test, and the test results were analyzed using two-way analysis of variance, post-hoc Tukey honestly significant difference test, and a paired sample t-test (α=0.05). It was found that bond strength was not statistically influenced by the kind of etching material used (p=0.224), but was significantly affected by heat treatment of applied silane (p&lt;0.001). The interaction between these two factors was not statistically significant (p=0.142). Group HF+S+WP showed the highest bond strength (12.56±1.73 MPa) (p&lt;0.05). Scanning electron microscopy revealed the effect of the different treatments on the surface characteristics of posts. In the four pretreated groups, the bond strength decreased significantly from the coronal to the apical root canal sections (p≤0.05). The results of this study show that the use of heat-treated silane significantly enhances the push-out bond strength of the fiber posts to root. HF acid etching with heat-treated silane application led to the highest bond strength.

A Multicenter Randomized Double-blind Controlled Clinical Trial of Fiber Post Cementation Strategies

2018 ◽  
Vol 43 (2) ◽  
pp. 128-135 ◽  
Author(s):  
CD Bergoli ◽  
LP Brondani ◽  
VF Wandscher ◽  
GKR Pereira ◽  
MS Cenci ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Survival Rate ◽  
Glass Fiber ◽  
Survival Rates ◽  
The Self ◽  
Controlled Clinical Trial ◽  
Fiber Post ◽  
Resin Cements ◽  
Double Blind ◽  
Significant Difference

SUMMARY Objectives: The aim of this prospective randomized multicenter clinical trial was to evaluate the survival rate of glass fiber–reinforced posts cemented with self-adhesive or regular resin cements. Methods: The sample was comprised of 152 teeth randomized within two centers and in accordance with the adhesive strategies for RelyX U100/U200 (3M ESPE) or Single Bond and RelyX ARC (3M ESPE). The cementation procedures were standardized and performed by previously trained operators. The primary outcome evaluated was post debonding. A trained evaluator, one for each center, assessed all subjects at intervals of 12 months for up to 6 years. Statistical analysis was performed using the Kaplan-Meier method. Results: There was no statistically significant difference in survival rates between the two strategies assessed (p=0.991), with a 92.7% survival rate for the self-adhesive cement and 93.8% for the regular cement. Conclusion: Both the self-adhesive and the regular resin cements are good alternatives for glass fiber post cementation.

scholarly journals Burst Pressures in Eyes with Clear Corneal Incisions Treated with ReSure Glue

2021 ◽  
Vol 2021 ◽  
pp. 1-3
Author(s):  
Ahmed E. M. Shehata ◽  
Siva P. Kambhampati ◽  
Jiangxia Wang ◽  
Uri S. Soiberman
Keyword(s):  
Ex Vivo ◽  
Early Postoperative Period ◽  
Burst Pressure ◽  
Control Group ◽  
Control Groups ◽  
Nylon Suture ◽  
Significant Difference ◽  
Biodegradable Hydrogel ◽  
Suture Group ◽  
Corneal Incisions

Purpose. This study aims to measure burst pressures in 3 mm clear corneal incisions sealed with ReSure, a biodegradable hydrogel sealant, and to compare it to traditional 10-0 nylon sutures and unsealed controls. Design. An ex vivo animal study. Methods. 3 mm clear corneal incisions were performed in rabbit eyes (ex vivo). The burst pressure was determined, and then, the incisions were sealed with either ReSure glue or a single 10-0 nylon suture. Burst pressure measurements were repeated. Results. Fourteen eyes were included. The median burst pressure in the suture-control group (7 eyes) prior to suture application was 7 mmHg (range: 0–45); the median burst pressure in the 7 glue-controls was 36 mmHg (range: 5–61, p  = 0.08 for the comparison of the two control groups). The median burst pressure in the glue group was 93 mmHg (range: 39–129, p  = 0.043 when compared to glue-control). The median burst pressure in the suture group was 158 mmHg (range: 70–180, p  = 0.018 when compared to suture-control). There was no statistically significant difference in burst pressure values between the glue and suture groups ( p  = 0.08). Conclusion. In this study, ReSure glue applied to 3 mm clear corneal incisions provided sufficient resistance to elevated intraocular pressure when compared to controls. The results of this study suggest that ReSure glue may be comparable to a single 10-0 nylon suture in resisting fluid egress during the early postoperative period.

scholarly journals Fracture Resistance of Simulated Immature Teeth after Different Intra-radicular Treatments

2015 ◽  
Vol 26 (3) ◽  
pp. 211-215 ◽  
Author(s):  
Gustavo Sivieri-Araujo ◽  
Mario Tanomaru-Filho ◽  
Juliane Maria Guerreiro-Tanomaru ◽  
Eduardo Antunes Bortoluzzi ◽  
Érica Gouveia Jorge ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Fracture Strength ◽  
Root Canal ◽  
Fracture Resistance ◽  
Testing Machine ◽  
Fiber Post ◽  
Immature Teeth ◽  
Fiber Posts ◽  
Glass Fiber Posts ◽  
Glass Fiber Post

The aim of this study was to evaluate the fracture resistance of simulated immature teeth after different intra-radicular treatments. Crowns and roots of bovine incisors were cut transversally and removed to simulate immature teeth. Root canal preparation and flaring were performed using a bur in crown-apex and apex-crown direction. The samples were distributed into 5 groups (n=10): Positive control (PoC) - no root canal flaring or filling; Negative control (NeC) - teeth were sectioned and their root canals were flared; Direct anatomical glass fiber post (RaP) - #2 Reforpost main glass fiber post relined with composite resin; Double tapered conical glass fiber posts (ExP) - #3 Exacto glass fiber post; and #2 Reforpost main glass fiber + Reforpin accessory glass fiber posts (RrP). In RaP, ExP and RrP, 4.0-mm apical plugs were done with MTA Angelus. The specimens were embedded in polystyrene resin inside cylinders and the periodontal ligament was simulated with a polyether-based impression material. The specimens were submitted to compressive fracture strength test (0.5 mm/min at 135° relative to the long axis of the tooth) in a servo-hydraulic mechanical testing machine MTS 810. Data were subjected to one-way ANOVA and Dunnett's C or Tukey's tests (α=0.05). The control groups (PoC and NeC) showed lower fracture strength than the experimental groups. NeC presented the lowest resistance and ExP presented the highest resistance among the experimental groups. The flaring procedures produced a detrimental effect on the fracture resistance of the bovine teeth. Glass fiber intra-radicular posts increased significantly the fracture resistance of simulated immature teeth.

scholarly journals Fracture Strength of Zirconia and Alumina Ceramic Crowns Supported by Implants

2015 ◽  
Vol 41 (S1) ◽  
pp. 352-359 ◽  
Author(s):  
Tonino Traini ◽  
Roberto Sorrentino ◽  
Enrico Gherlone ◽  
Federico Perfetti ◽  
Patrizio Bollero ◽  
...  
Keyword(s):  
Fracture Strength ◽  
Glass Ceramic ◽  
Ceramic Materials ◽  
Fracture Load ◽  
Fractographic Analysis ◽  
Core Material ◽  
Loading Test ◽  
Significant Difference ◽  
Cad Cam ◽  
Ceramic Crowns

Due to the brittleness and limited tensile strength of the veneering glass-ceramic materials, the methods that combine strong core material (as zirconia or alumina) are still under debate. The present study aims to evaluate the fracture strength and the mechanism of failure through fractographic analysis of single all-ceramic crowns supported by implants. Forty premolar cores were fabricated with CAD/CAM technology using alumina (n = 20) and zirconia (n = 20). The specimens were veneered with glass-ceramic, cemented on titanium abutments, and subjected to loading test until fracture. SEM fractographic analysis was also performed. The fracture load was 1165 (±509) N for alumina and 1638 (±662) N for zirconia with a statistically significant difference between the two groups (P = 0.026). Fractographic analysis of alumina-glass-ceramic crowns, showed the presence of catastrophic cracks through the entire thickness of the alumina core; for the zirconia-glass-ceramic crowns, the cracks involved mainly the thickness of the ceramic veneering layer. The sandblast procedure of the zirconia core influenced crack path deflection. Few samples (n = 3) showed limited microcracks of the zirconia core. Zirconia showed a significantly higher fracture strength value in implant-supported restorations, indicating the role played by the high resistant cores for premolar crowns.

scholarly journals Reinforcement of Teeth With Simulated Coronal Fracture and Immature Weakened Roots Using Resin Composite Cured by a Modified Layering Technique

2014 ◽  
Vol 39 (3) ◽  
pp. E128-E136 ◽  
Author(s):  
RS Seyam ◽  
EH Mobarak
Keyword(s):  
Resin Composite ◽  
Mineral Trioxide Aggregate ◽  
Fracture Load ◽  
Strengthening Effect ◽  
Degree Of Cure ◽  
Significant Difference ◽  
Post Hoc ◽  
Root Apices ◽  
Vertise Flow ◽  
Dentin Thickness

SUMMARY Objective The purpose of this study was to evaluate the strengthening effect of resin composite, cured by a modified layering protocol, for teeth with simulated coronal fracture and weakened immature roots. Methods Fifty maxillary teeth were decoronated and their apices sectioned to standardize the length to 12 mm. Prepared teeth were equally distributed into five groups. Group 1VF root apices were flared with Pesso drills up to size 6. The roots were flared until a dentin thickness of only 1 ± 0.2 mm remained. Root ends were filled with mineral trioxide aggregate. The canals were backfilled with Vertise Flow following a modified layering protocol using two light-transmitting posts size 6 and 3. Next, a DT light post size 2 was cemented using the same material. Groups 2TS/MF and 3ED/PF were prepared and cured in the same way as group 1VF but filled with Clearfil Tri-S Bond/Majesty Flow and ED Primer II/Panavia F2.0 respectively. Group 4UF was similarly prepared but left unfilled (control). In group 5NW, roots were unflared but similarly filled as in group 3ED/PF. After 24 hours of storage, the fracture load was measured. The degree of cure for each tested material was indirectly measured using microhardness at different root levels (cervical, middle, and apical). Data were analyzed using one-way analysis of variance followed by Newman-Keuls post hoc test. Results Fracture load results revealed that groups 1VF and 2TS/MF had no statistically significant difference from group 5NW (p&gt;0.05). For each tested material, no significant difference was found among microhardness values at different root levels. Conclusion It may be possible to reinforce the teeth with coronal fracture and immature weakened roots to be comparable with unweakened ones when composite is applied and cured by the modified layering technique.

scholarly journals Influence of Different Restorative Techniques on the Strength of Endodontically Treated Weakened Roots

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Khalid H. Alsamadani ◽  
El-Sayed Mohammed Abdaziz ◽  
El-Sayed Gad
Keyword(s):  
Glass Fiber ◽  
Fracture Resistance ◽  
Testing Machine ◽  
Negative Control Group ◽  
Negative Control ◽  
Fracture Load ◽  
Control Group ◽  
Fiber Post ◽  
Gutta Percha ◽  
Glass Fiber Post

Objective. Comparing effect of different restoration techniques on fracture resistance of compromised roots.Methods. Crowns of 100 single-rooted teeth were sectioned and 10 roots were kept as negative control group (Group 1). Remaining roots were instrumented and divided into one and positive control group of 10 samples (Group 2) and 4 experimental groups of 20 samples each. Group 3: roots were obturated with gutta-percha; Group 4: roots were restored with gutta-percha, composite, and glass fiber post; Group 5: roots were obturated with Resilon; Group 6: Roots were restored with Resilon, composite, and glass fiber post. Roots were weakened before obturation in groups 2, 3, and 5 and after obturation in groups 4 and 6. Fracture strengths were measured using Dartec testing machine and fracture load was recorded in kilo-Newton. Statistical analysis was done using ANOVA and Tukeys test.Results. The fractures resistance of restored roots was significantly higher in groups 4, 5, and 6 than in Groups 2 and 3. There were no significant differences between groups 1, 4, 5, and 6.Conclusions. Restoration of weakened roots with Resilon or bonding an intermediate composite resin to coronal radicular dentin and to glass fiber post increased their fracture resistance.

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