scholarly journals Influence of Post-Core and Crown Type on the Fracture Resistance of Incisors Submitted to Quasistatic Loading

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1130
Author(s):  
Sadullah Uctasli ◽  
Yakup Boz ◽  
Sercan Sungur ◽  
Pekka K. Vallittu ◽  
Sufyan Garoushi ◽  
...  
Keyword(s):  
Fracture Resistance ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Loading Test ◽  
Fiber Reinforced Composite ◽  
Failure Type ◽  
Fiber Posts ◽  
Reinforced Composite ◽  
Luting Cement ◽  
Cad Cam

The aim of this paper was to evaluate the fracture resistance and failure type of maxillary incisor teeth, rebuilt with various types of post-core restorations and full crowns made of either direct conventional particulate filler composite (PFC, G-aenial Anterior, GC, Tokyo, Japan) or indirect CAD/CAM restorations (composite Cerasmart 270 and glass ceramic LiSi Block from GC). One hundred (n = 10/group) central incisors were cut and divided into 10 experimental groups restored with different approaches. In approach A, teeth were restored with a core build-up composite (Gradia Core, GC) for a core and full crown of PFC. Approach B had teeth restored using composite core and prefabricated fiber posts, and a complete crown of either PFC or CAD/CAM. Approach C contained teeth restored with a core of short fiber-reinforced composite (everX Flow, GC) and prefabricated fiber posts, and a complete crown of either PFC or CAD/CAM. In approach D, the teeth had a core of short fiber-reinforced composite only, and a complete crown of either PFC or CAD/CAM restorations. The root canals were prepared, and when posts were used, they were luted with either a dual-cure resin cement (LinkForce, GC) or everX Flow. As the control, sound teeth (n = 10) were used. Restorations were quasi-statically loaded until fracture. Failure type was visually investigated. The interface between the fiber post and luting cement was investigated using SEM, before and after completion of the loading test. The data were analyzed by analysis of variance (p = 0.05) followed by Tukey’s test. None of the restorative approaches restored the fracture load strength of intact teeth (p < 0.05). Restorations with additional fiber posts (Approaches B and C) had higher load-bearing capacity (p < 0.05) than restorations without fiber posts (Approaches A and D). Restorations that had short fiber-reinforced composite cores with or without fiber posts presented more repairable failures. Using short fiber-reinforced composite as post-luting and core build-up material with conventional fiber posts proved to be a promising method to strengthen severely damaged incisors.

Fracture Resistance of CAD/CAM-Fabricated Fiber-Reinforced Composite Denture Retainers

2013 ◽  
Vol 26 (4) ◽  
pp. 381-383 ◽  
Author(s):  
Kohji Nagata ◽  
Noriyuki Wakabayashi ◽  
Hidekazu Takahashi ◽  
Pekka K Vallittu ◽  
Lippo VJ Lassila
Keyword(s):  
Fracture Resistance ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Cad Cam

Bond strength of fiber posts and short fiber-reinforced composite to root canal dentin following cyclic loading

2016 ◽  
Vol 31 (13) ◽  
pp. 1397-1407 ◽  
Author(s):  
Emre Nagas ◽  
Isil Cekic-Nagas ◽  
Ferhan Egilmez ◽  
Gulfem Ergun ◽  
Pekka K. Vallittu ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Bond Strength ◽  
Root Canal ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Fiber Posts ◽  
Reinforced Composite ◽  
Root Canal Dentin

scholarly journals Effect of Cementation Technique of Individually Formed Fiber-Reinforced Composite Post on Bond Strength and Microleakage

2013 ◽  
Vol 7 (1) ◽  
pp. 68-75 ◽  
Author(s):  
Dominika Makarewicz ◽  
Anna-Maria B Le Bell-Rönnlöf ◽  
Lippo V.J. Lassila ◽  
Pekka K. Vallittu
Keyword(s):  
Bond Strength ◽  
Fiber Reinforced ◽  
Loading Test ◽  
Bonding Agents ◽  
Fiber Reinforced Composite ◽  
Dye Penetration ◽  
Reinforced Composite ◽  
Direct Technique ◽  
Luting Cement ◽  
Post Space

Objectives: The aim of this study was to evaluate the effect of two different cementation techniques of individually formed E-glass fiber-reinforced composite (FRC) post on bond strength and microleakage. Methods: The crowns of extracted third molars were removed and post preparation was carried out with parapost drills (diameter 1.5 mm). After application of bonding agents individually formed FRC posts (everStick POST, diameter 1.5 mm) were cemented into the post spaces with either ParaCem®Universal or self-adhesive RelyX™Unicem, using two different cementation techniques: 1) an “indirect (traditional) technique” where the post was prepolymerized prior application of luting cement and insertion into the post space or 2) a “direct technique” where the uncured post was inserted to the post space with luting cement and light-polymerized in situ at the same time. After water storage of 48 hours, the roots (n = 10/group) were cut into discs of thickness of 2 mm. A push-out force was applied until specimen fracture or loosening of the post. A microleakage test was carried out on roots which were not subjected to the loading test (n= 32) to evaluate the sealing capacity of the post-canal interface. The microleakage was measured using dye penetration depth under a stereomicroscope. Results: Higher bond strength values (p<0.05) and less microleakage (p<0.05) were obtained with the “direct technique” compared to the “indirect technique”. None of the FRC posts revealed any dye penetration between the post and the cement. Conclusions: The “direct technique” seems to be beneficial when cementing individually formed FRC posts.

Fracture Resistance of Premolars Restored Either with Short Fiber or Polyethylene Woven Fiber-Reinforced Composite

2016 ◽  
Vol 28 (6) ◽  
pp. 412-418 ◽  
Author(s):  
Mügem Asli Gürel ◽  
Bağdagül Helvacioğlu Kivanç ◽  
Adil Ekıcı ◽  
Tayfun Alaçam
Keyword(s):  
Fracture Resistance ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

Effect of aging and testing method on bond strength of CAD/CAM fiber-reinforced composite to dentin

2018 ◽  
Vol 34 (11) ◽  
pp. 1690-1701 ◽  
Author(s):  
Lucas Fracassi de Oliveira Lino ◽  
Camila Moreira Machado ◽  
Vitor Guarçoni de Paula ◽  
Hugo Alberto Vidotti ◽  
Paulo G. Coelho ◽  
...  
Keyword(s):  
Bond Strength ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Testing Method ◽  
Reinforced Composite ◽  
Cad Cam

Root Canal Retreatment and Intracoronal Bleaching on the Maxillary First Premolar

2020 ◽  
Vol 48 ◽  
pp. 10-14
Author(s):  
Cynthia Carissa ◽  
Tunjung Nugraheni ◽  
Yulita Kristanti
Keyword(s):  
Root Canal ◽  
Good Condition ◽  
Glass Ionomer Cement ◽  
Short Fiber ◽  
Root Canal Treatment ◽  
Glass Ionomer ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Root Canal Retreatment

Introduction. Inadequate root canal preparation and obturation are potential causes of endodontic failure. Failed root canal treatment with intrinsic discoloration requires root canal re-treatment and intracoronal bleaching. Due to the extensive loss of hard tissues on occlusal area, the restoration requires intracanal retention with short fiber-reinforced composite. Case report. A 17-year-old male patient came to the Clinic of Conservative Dentistry Dental Hospital Prof. Soedomo. He reported pain and discomfort on maxillary first premolar while chewing after root canal procedure had been performed few months before. He felt unconvinience with the discoloration happened on those tooth. Patient had endodontic treatment one year ago and the tooth was restored with glass ionomer cement. Objective examination showed glass ionomer restoration was still in good condition, the tooth was sensitive to percussion but not to palpation, and showed no mobility. Periapical radiograph showed incomplete obturation with radioluscent around periapical region. Retreatment followed by intracoronal bleaching was performed under rubber dam isolation. Tooth was restored with short fiber reinforced composite and composite resin. After 3 month, patient was recalled for examine the previous sign and symptomps. Periapical radiograph showed diameter of periapical lesion was smaller and tooth functioned normally. Conclusion. Root canal retreatment and intracoronal bleaching are suitable options for teeth with failed root canal treatment and intrinsic discoloration

scholarly journals Experimental Validation of an Additively Manufactured Stiffness-Optimized Short-Fiber Reinforced Composite Clevis Joint

2019 ◽  
Vol 59 (6) ◽  
pp. 859-869 ◽  
Author(s):  
Y. Saito ◽  
F. Fernandez ◽  
D.A. Tortorelli ◽  
W.S. Compel ◽  
J.P. Lewicki ◽  
...  
Keyword(s):  
Experimental Validation ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite
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