scholarly journals Effect of intraradicular reinforcement strategies on the fracture strength of endodontically treated anterior teeth with overflared canals

2022 ◽  
pp. e79-e84
Author(s):  
M. Sarand ◽  
M. Bahari ◽  
M. Kahnamoui ◽  
M. Chaharom ◽  
S. Shahi
Keyword(s):  
Fracture Strength ◽  
Anterior Teeth ◽  
Reinforcement Strategies

The influence of different access cavity designs on the fracture strength in endodontically treated mandibular anterior teeth

2004 ◽  
Vol 29 (6) ◽  
pp. 515 ◽  
Author(s):  
Young-Gyun Lee ◽  
Hye-Jin Shin ◽  
Se-Hee Park ◽  
Kyung-Mo Cho ◽  
Jin-Woo Kim
Keyword(s):  
Fracture Strength ◽  
Anterior Teeth

Effect of Calcium Hydroxide as a Root Canal Dressing Material on Dentin Fracture Strength In Primary Teeth–In Vitro Study

2018 ◽  
Vol 42 (2) ◽  
pp. 146-149
Author(s):  
Fadi Said ◽  
Moti Moskovitz
Keyword(s):  
Calcium Hydroxide ◽  
Fracture Strength ◽  
Root Canal ◽  
Primary Teeth ◽  
In Vitro Study ◽  
Vitro Study ◽  
Root Canal Treatment ◽  
Root Canals ◽  
Anterior Teeth

Objectives: The aim of the present study was to assess the effect of calcium hydroxide as a root canal dressing material on dentin microtensile fracture strength in human primary teeth in vitro. Study design: Thirty primary anterior teeth with root canals packed with calcium hydroxide were divided into groups of ten and immersed in saline at room temperature for 7, 30 and 90 days. Ten teeth with root canals filled with sterile saline were the control group. Microtensile fracture strength was measured in Mechanical tester Lloyd testing machine. Results: There was a significant difference (P < 0.05) between the fracture strength of the calcium hydroxide-filled teeth after 90 days (19.1 MPa) compared with the control (35.8 MPa). Dentin microtensile fracture strength of the calcium hydroxide-filled teeth decreased at an average of 0.142 MPa per day. Conclusion: Calcium hydroxide placed in root canals for an extended time had a significantly negative effect on root strength. Long-term success of root canal treatment in primary anterior teeth is estimated as 65% with most of the failures result from trauma recurrence. Clinical Relevance: Our results stress the need to evaluate the pros and cons of root canal treatment compared to extractions of non-vital primary incisors.

scholarly journals Effect of Different Fiber Reinforcement Strategies on the Fracture Strength of Composite Resin Restored Endodontically Treated Premolars

2019 ◽  
Vol 19 (1) ◽  
pp. 1-10
Author(s):  
Mahmoud Bahari ◽  
Narmin Mohammadi ◽  
Soodabeh Kimyai ◽  
Mehdi Abed kahnamoui ◽  
Hafez Vahedpour ◽  
...  
Keyword(s):  
Fracture Strength ◽  
Composite Resin ◽  
Fiber Reinforcement ◽  
Reinforcement Strategies

Comparison of Fracture Strengths among different Commonly Placed Anterior Esthetic Restorations for Primary Dentition: An in vitro study

2021 ◽  
Vol 45 (3) ◽  
pp. 171-176
Author(s):  
Brent Lin ◽  
Amit Khatri ◽  
Michael Hong
Keyword(s):  
Fracture Strength ◽  
Testing Machine ◽  
In Vitro Study ◽  
Vitro Study ◽  
Anterior Teeth ◽  
Study Results ◽  
Luting Cement ◽  
Significant Difference ◽  
All Ceramic

The purpose of this study was to determine and compare the shear force (N) required to fracture or dislodge an all-ceramic zirconia-based crown using different luting cement with those of polycarbonate crown and strip crown for the primary anterior teeth in vitro. Study design: Four groups of esthetic restoration for primary anterior teeth were tested for fracture strength: 1) Fifteen all-ceramic zirconia-based crowns cemented with glass ionomer cement, 2) Fifteen all-ceramic zirconia-based crowns bonded with a self-adhesive resin cement, 3) Fifteen polycarbonate crowns cemented with a polymer reinforced zinc-oxide eugenol and 4) Fifteen resin strip crowns. All restorations were placed and cemented on reproductions of dies in an independent laboratory at Delhi, India. All samples underwent loading until fracture or dislodgement with the Universal Testing Machine. The force in Newton (N) required to produce failure was recorded for each sample and the type of failures was also noted and characterized. One-way analysis of variance (ANOVA) test and the Tukey and Scheffe’s post hoc comparisons were used for statistical analyses. Results: In this invitro study, results were measured in Newtons (N). Group 1 (410.9±79.5 N) and Group 2 (420.5±57.8 N) had higher fracture strength than Group 3 (330.3±85.6 N) and Group 4 (268.4±28.2 N). These differences were statistically significant at P≤.05 among the sample groups. No significant difference was found between groups 1 and 2 (P = 0.984) nor between groups 3 and 4 (P =0.104). Among type of failures, majority of restoration fractures for zirconia-based crowns and resin strip crowns were due to cohesive failures and polycarbonate crowns had predominantly mixed failures. Conclusions: Under the limitations of this in vitro study, it could be concluded that all-ceramic zirconia-based crowns attained the highest fracture strength among all restorative samples tested regardless of the type of luting agent employed (P<.01). Cohesive failures were commonly observed in the zirconia crowns and resin strip crowns, whereas polycarbonate crowns revealed predominately mixed failures.

scholarly journals Fracture Strength of Weakened Anterior Teeth Associated to Different Reconstructive Techniques

2016 ◽  
Vol 27 (5) ◽  
pp. 556-561 ◽  
Author(s):  
Mariana Carolina de Lara Ferro ◽  
◽  
Vivian Colucci ◽  
Artur Gaiotto Marques ◽  
Ricardo Faria Ribeiro ◽  
...  
Keyword(s):  
Fracture Strength ◽  
Testing Machine ◽  
Resin Cement ◽  
Internal Wall ◽  
Endodontically Treated Teeth ◽  
Static Tests ◽  
Chewing Simulation ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Reconstructive Techniques

Abstract This study evaluated the fracture strength of endodontically treated teeth submitted to reconstructive techniques through dynamic and static tests. Forty human anterior teeth were divided into 4 groups (n=10): GNW (non-weakened) - root restored with glass fiber post (GFP), GW - weakened root restored with GFP, GDA - weakened root restored with direct anatomic GFP, and GIA - weakened root restored with indirect anatomic GFP. The teeth were endodontically treated considering that experimental groups (GW, GDA and GIA) simulated weakened roots for restoration with GFP using different techniques. The GFP was luted with resin cement and the coronal portion was restored with composite resin and metallic crowns. All samples were submitted to chewing simulation at 60 cycles/min in a total of 300,000 cycles. The survival samples were further exposed to compressive loading at a crosshead speed of 1.0 mm/min in a universal testing machine. The load was applied at 135° to the long axis of the tooth until failure. Data were analyzed by ANOVA (a=0.05). After chewing simulation were observed: GNW: 100% of survival roots; GW: 70% of survival roots, and GDA and GIA: 80% of survival roots. The mean fracture strength values (N) were 280.6 (GNW), 239.0 (GW), 221.3 (GDA), and 234.1 (GIA) without significant difference among the groups (p=0.7476). The results suggested similar fracture strength in both weakened and non-weakened teeth regardless the reconstructive technique of root internal wall. Higher incidence of catastrophic fracture was observed in weakened teeth without restoration of the root internal wall.

scholarly journals Reattachment of Fractured Anterior Teeth—Determining Fracture Strength using Different Techniques: An in vitro Study

2012 ◽  
Vol 13 (1) ◽  
pp. 61-65 ◽  
Author(s):  
Ena Mathur ◽  
Srilatha LNU ◽  
Sonal Joshi ◽  
Neha Chhasatia ◽  
PJ Rani
Keyword(s):  
Bond Strength ◽  
Fracture Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Group Iv ◽  
Group Iii ◽  
Anterior Teeth ◽  
Strength Recovery ◽  
Group I

ABSTRACT Aim The aim of this in vitro study was to evaluate and compare the shear bond strength of teeth reattached with sixth generation dentin bonding agent: Xeno III and microhybrid resin composite: Esthet-X, using three different techniques: (1) Simple reattachment, (2) overcontour and (3) internal dentinal groove. Methodology A total of 70 human maxillary central incisors were selected and divided into four groups as follows. Group I: Control group comprised of 10 samples. Group II: Simple reattachment, group III: Overcontour and group IV: Internal dentinal groove. Groups II, III and IV comprised of 20 samples each. The teeth in three study groups were sectioned using a diamond disk and the fragment was reattached with Esthet-X and Xeno III using three different techniques. Specimens were stored in tap water for 24 hours and shear bond strength was determined using universal testing machine using a knifeedge chisel (0.5 mm in cross-section) at a crosshead speed of 1 mm/minute. Results The results of this study showed following mean value of fracture strength in Kgf: Group I: Control—27.71; group II: Simple reattachment—9.78; group III: Overcontour—24.41; group IV: Internal dentinal groove—23.83. Conclusion The overcontour technique had the highest strength recovery while the simple reattachment had the lowest. Clinical significance The overcontour technique provided strength recovery almost similar to intact teeth emphasizing that tooth preparation influenced fracture resistance. How to cite this article Srilatha, Joshi S, Chhasatia N, Rani PJ, Mathur E. Reattachment of Fractured Anterior Teeth— Determining Fracture Strength using Different Techniques: An in vitro Study. J Contemp Dent Pract 2012; 13(1):61-65.

scholarly journals Fracture Strength of Severely Damaged Primary Anterior Teeth after Restoration with Composite Resin and Resin-Modified Glass Ionomer Cement

2016 ◽  
Vol 28 (2) ◽  
pp. 57-63
Author(s):  
Mehrsa Paryab ◽  
Hoseain Afshar ◽  
Bahman Seraj ◽  
Salar Shakibapoor ◽  
Mohammad Javad Kharazifard ◽  
...  
Keyword(s):  
Fracture Strength ◽  
Composite Resin ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Anterior Teeth ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

scholarly journals Influence of glass fiber posts and class III direct restorations on the resistance of anterior teeth

2020 ◽  
Vol 36 (5) ◽  
Author(s):  
Bruna Carbonari Massafra ◽  
Dandara Anderle ◽  
Doglas Cecchin ◽  
Bruno Carlini Júnior ◽  
Matheus Albino Souza ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Failure Mode ◽  
Fracture Strength ◽  
Testing Machine ◽  
Class Iii ◽  
Endodontically Treated Teeth ◽  
Anterior Teeth ◽  
Fiber Posts ◽  
Glass Fiber Posts ◽  
Glass Fiber Post

This study objectives to evaluate the fracture strength of upper central incisors (UCI) restored with composite resin (CR) in Class III cavities and endodontically treated teeth with or without glass fiber post (GFP), analyzing their failure mode. Sixty human UCI were randomly divided into four experimental groups: endodontically treated teeth without GFP (G1), endodontically treated teeth with GFP (G2), teeth with mesial/distal Class III cavities restored with CR without GFP (G3), and teeth with mesial/distal Class III cavities restored with CR with GFP (G4). The samples were submitted to the fracture strength test in a universal testing machine with a compression shear load applied at speed of 1.0 mm/min until fracture occurred. The data were submitted to one-way ANOVA (α=0.05) and the samples were analyzed for failure mode. The analysis did not show a significant statistical difference in fracture strength between the groups (p>0.05). The results showed that only endodontically treated teeth (G1) (753.4N) presented behavior similar to teeth with GFP (G2) (702.1N). The same occurred when comparing teeth with Class III cavities without GFP (G3) (670.2 N) and with GFP (G4) (746.1N). It can be concluded that glass fiber posts do not change the fracture strength of incisors with endodontic treatment and Class III cavities.

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