scholarly journals Degree of Conversion and Mechanical Properties of Modern Self-Adhesive Luting Agents

2021 ◽  
Vol 11 (24) ◽  
pp. 12065
Author(s):  
Maria Dimitriadi ◽  
Aikaterini Petropoulou ◽  
Maria Zafiropoulou ◽  
Spiros Zinelis ◽  
George Eliades
Keyword(s):  
Mechanical Properties ◽  
Ftir Spectroscopy ◽  
Resin Composite ◽  
Storage Period ◽  
Degree Of Conversion ◽  
Superior Performance ◽  
Indentation Modulus ◽  
Luting Agents ◽  
Adhesive Luting ◽  
Dual Curing

New self-adhesive resin composite luting agents have currently been developed, claiming improved properties. The study aimed to evaluate the composition, degree of conversion, and mechanical properties of Panavia SA Plus (PSP), Panavia SA Universal (PSU), SpeedCem Plus (SPC) and TheraCem Ca (THC), with the resin luting agent Panavia V5 (PV5) serving as a control. The structure of the materials was studied by FTIR spectroscopy and SEM/EDX spectrometry. Disk-shaped specimens were prepared from each material under dual- and self-curing modes (n = 5/mode and material). After a 3-week storage period (dark/37 °C/80%RH) the Martens hardness, indentation modulus, elastic index, and creep were determined by instrumented indentation testing (IIT), while the degree of conversion was assessed by FTIR spectroscopy. Statistical analysis was performed by 2-way ANOVA and post-hoc testing (α = 0.05). All materials were based on aromatic monomers, except for SPC. Fillers with potentially bioactive Ca-glasses were identified in SPC and THC, which showed the highest P/Si ratio. The dual-curing mode demonstrated superior performance in all properties. Differences between materials within each curing mode were limited to SPC, THC (highest conversion) and PSA, PSU, SPC (highest elastic index) for dual-curing, and THC (lowest hardness and elastic index). The results confirmed a lower self-curing conversion in these materials, which may affect some of the mechanical properties tested.

scholarly journals Time-dependent degree of conversion, Martens parameters, and flexural strength of different dual-polymerizing resin composite luting materials

2021 ◽  
Author(s):  
Matthias Kelch ◽  
Bogna Stawarczyk ◽  
Felicitas Mayinger
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Resin Composite ◽  
Practical Importance ◽  
Degree Of Conversion ◽  
Polymerization Reaction ◽  
Indentation Modulus ◽  
Fixed Dental Prostheses ◽  
Long Term Performance ◽  
Term Performance

Abstract Objective To investigate the degree of conversion (DC), Martens hardness (HM), elastic indentation modulus (EIT), and biaxial flexural strength (BFS) of six dual-polymerizing resin composite luting materials initially and after 2 and 7 days of aging. Materials and methods Specimens fabricated from Bifix QM (BIF; VOCO), Calibra Ceram (CAL; Dentsply Sirona), DuoCem (DUO; Coltène/Whaledent), G-CEM LinkForce (GCE; GC Europe), PANAVIA V5 (PAN; Kuraray Europe), and Variolink Esthetic DC (VAR; Ivoclar Vivadent) (n = 12 per material) were light-polymerized through 1 mm thick discs (Celtra Duo, Dentsply Sirona). DC, HM, and EIT were recorded directly after fabrication, and after 2 and 7 days of aging. As a final test, BFS was measured. Univariate ANOVAs, Kruskal–Wallis, Mann–Whitney U, Friedman, and Wilcoxon tests, and Weibull modulus were computed (p < 0.05). Results While CAL presented low DC, HM, EIT, and BFS values, DUO and BIF showed high results. Highest Weibull moduli were observed for VAR and DUO. DC and Martens parameters increased between the initial measurement and 2 days of aging, while aging for 7 days provided no further improvement. Conclusions The choice of dual-polymerizing resin composite luting material plays an important role regarding chemical and mechanical properties, especially with patients sensitive to toxicological issues. DUO may be recommended for bonding fixed dental prostheses, as it demonstrated significantly highest and reliable results regarding DC, HM, and BFS. As DC and HM showed an increase in the first 48 h, it may be assumed that the polymerization reaction is not completed directly after initial polymerization, which is of practical importance to dentists and patients. Clinical relevance The chemical and mechanical properties of dual-polymerizing resin composite luting materials influence the overall stability and long-term performance of the restoration.

scholarly journals Development of Chlorhexidine Loaded Halloysite Nanotube Based Experimental Resin Composite with Enhanced Physico-Mechanical and Biological Properties for Dental Applications

2020 ◽  
Vol 4 (2) ◽  
pp. 81 ◽  
Author(s):  
Tejas Barot ◽  
Deepak Rawtani ◽  
Pratik Kulkarni
Keyword(s):  
Mechanical Properties ◽  
Resin Composite ◽  
Biological Properties ◽  
Degree Of Conversion ◽  
Dental Composites ◽  
Resin Composites ◽  
Dental Resin ◽  
Dental Resin Composites ◽  
Mass Fractions ◽  
Nih 3T3

Objective: The objective of this study was to explore the effect of Chlorhexidine-loaded Halloysite nanotubes (HNT/CHX) fillers (diverse mass fractions from 1 to 10 wt.%) on physicochemical, morphological and biological properties of newly developed experimental dental resin composite, in order to compare with the properties of composites composed of conventional glass fillers. Methods: The dental resin composites were prepared by incorporating various proportions of HNT/CHX. Six different groups of specimens: control group and five groups composed of varied mass fractions of HNT/CHX (e.g., 1.0, 2.5, 5.0, 7.5 and 10 wt.%) as fillers in each group were fabricated. Mechanical properties of the composites were monitored, using UTM. The degree of conversion of dental resin composites and their depth of cure were also evaluated. Antimicrobial properties of dental composites were studied in vitro by applying agar diffusion test on strain Streptococcus mutans and cytotoxicity were studied using NIH-3T3 cell line. Results: The incorporation of varied mass fractions (1.0 to 5.0 wt.%) of HNT/CHX in dental resins composites enhanced mechanical properties considerably with significant antibacterial activity. The slight decrease in curing depth and degree of conversion values of composites indicates its durability. No cytotoxicity was noticed on NIH-3T3 cell lines. Significance: Consistent distribution of HNT/CHX as a filler into dental composites could substantially improve not only mechanical properties but also biological properties of dental composites.

Bond Strength Evaluation of Three Self-adhesive Luting Systems Used for Cementing Composite and Porcelain

2011 ◽  
Vol 36 (6) ◽  
pp. 626-634 ◽  
Author(s):  
F De Angelis ◽  
A Minnoni ◽  
LM Vitalone ◽  
F Carluccio ◽  
M Vadini ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Clinical Relevance ◽  
Ease Of Use ◽  
Adhesive Systems ◽  
Strength Evaluation ◽  
Luting Agents ◽  
Adhesive Luting

Clinical Relevance Although all self-adhesive systems give improved handling and ease of use compared to traditional multi-step adhesive cements, clinicians should still consider self-adhesive cements as a heterogeneous category of luting agents that need to be better classified in terms of bond strength and chemical/mechanical properties.

scholarly journals Retentive Force of Three Fiber-reinforced Resin Composite Posts and a Zirconia Post Cemented with Two Adhesive Luting Agents: In Vitro Study

2007 ◽  
Vol 26 (5) ◽  
pp. 672-676 ◽  
Author(s):  
Zelal SEYFIOGLU POLAT ◽  
Ibrahim Halil TACIR ◽  
Sebnem ESKIMEZ ◽  
M. Yusuf ÇELIK
Keyword(s):  
Resin Composite ◽  
In Vitro Study ◽  
Vitro Study ◽  
Fiber Reinforced ◽  
Retentive Force ◽  
Luting Agents ◽  
Adhesive Luting

scholarly journals The effect of thermocycling on the degree of conversion and mechanical properties of a microhybrid dental resin composite

2018 ◽  
Vol 43 (2) ◽  
Author(s):  
Mehrsima Ghavami-Lahiji ◽  
Melika Firouzmanesh ◽  
Hossein Bagheri ◽  
Tahereh S. Jafarzadeh Kashi ◽  
Fateme Razazpour ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Resin Composite ◽  
Degree Of Conversion ◽  
Dental Resin

Mechanical properties of polyoxymethylene whiskers/polyoxymethylene resin composite films

1989 ◽  
Vol 24 (6) ◽  
pp. 2245-2249 ◽  
Author(s):  
Masaki Shimomura ◽  
Yoji Maeda ◽  
Yoshikazu Tanabe
Keyword(s):  
Mechanical Properties ◽  
Resin Composite ◽  
Composite Films

Radiographic detection of overhangs formed by resin composite luting agents

1995 ◽  
Vol 23 (6) ◽  
pp. 353-357 ◽  
Author(s):  
B. O'Rourke ◽  
A.W.G. Walls ◽  
R.W. Wassell
Keyword(s):  
Resin Composite ◽  
Luting Agents

scholarly journals Mechanical properties, volumetric shrinkage and depth of cure of short fiber-reinforced resin composite

2016 ◽  
Vol 35 (3) ◽  
pp. 418-424 ◽  
Author(s):  
Akimasa TSUJIMOTO ◽  
Wayne W. BARKMEIER ◽  
Toshiki TAKAMIZAWA ◽  
Mark A. LATTA ◽  
Masashi MIYAZAKI
Keyword(s):  
Mechanical Properties ◽  
Resin Composite ◽  
Short Fiber ◽  
Volumetric Shrinkage ◽  
Fiber Reinforced ◽  
Depth Of Cure

Effect of Fiber’s Surface Pretreatment on the Interfacial Bonding Strength between Steel Fiber and Resin

2014 ◽  
Vol 989-994 ◽  
pp. 177-180
Author(s):  
Hao Yang ◽  
Jian Hua Zhang ◽  
Guo Yan Sun ◽  
Yi Zhang
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Bonding Strength ◽  
Steel Fiber ◽  
Resin Composite ◽  
Interfacial Bonding ◽  
Steel Fibers ◽  
Surface Pretreatment ◽  
Interfacial Bonding Strength ◽  
Coupling Treatment

For the characteristic that the mechanical properties of resin composite are lower than cast iron, steel fibers are used to improve its properties in this paper. A weak interfacial bonding strength between steel fibers and resin indicates that steel fibers’ property cannot perform well in the polymer. In order to improve the interfacial bonding strength, four methods of surface treatment, phosphating, acid pickling, oxidation, and coupling are applied to steel fibers, and the corresponding pull-off tests are carried out to compare with untreated steel fibers. Research results show that the maximum interfacial bonding strength is increased by 45.1% after coupling treatment.

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