scholarly journals Evaluation of the Behavior of Two CAD/CAM Fiber-Reinforced Composite Dental Materials by Immersion Tests

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7185
Author(s):  
Farah Bechir ◽  
Simona Maria Bataga ◽  
Adrian Tohati ◽  
Elena Ungureanu ◽  
Cosmin Mihai Cotrut ◽  
...  
Keyword(s):  
Surface Morphology ◽  
High Performance ◽  
Artificial Saliva ◽  
Dental Materials ◽  
Sem Analysis ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Oral Rehabilitation ◽  
Immersed Surfaces ◽  
Cad Cam

Fiber-reinforced composites are used as restorative materials for prosthetic oral rehabilitation. Gastroesophageal reflux disease (GERD) is an accustomed affection with various oral manifestations. This study aimed to evaluate the behavior of two high-performance CAD/CAM milled reinforced composites (Trinia™, TriLor) in artificial saliva at different pH levels through immersion tests, and to determine if changes in mass or surface morphology at variable pH, specific for patients affected by GERD, appear. After investigating the elemental composition and surface morphology, the specimens were immersed in Carter Brugirard artificial saliva for 21 days at different pH values (5.7, 7.6, and varying the pH from 5.7 to 3). The values of the weighed masses during the immersion tests were statistically processed in terms of mean and standard deviation. Results suggested that irrespective of the medium pH, the two composites presented a similar mass variation in the range of −0.18 (±0.01)–1.82 (±0.02) mg after immersion, suggesting their stability when in contact with artificial saliva, an aspect which was also highlighted by scanning electron microscope (SEM) analysis performed on the immersed surfaces. Novel composite biomaterials can be a proper alternative for metal alloys used for prosthetic frameworks in patients suffering from GERD.

Influence of Loading Frequency on Thermal and Micro-Mechanical Damage During Fatigue of Flax Fiber Reinforced Composites

2020 ◽  
Author(s):  
Md. Zahirul Islam ◽  
Chad A. Ulven
Keyword(s):  
High Performance ◽  
Thermal Damage ◽  
Natural Fiber ◽  
Mechanical Damage ◽  
Flax Fiber ◽  
Fiber Reinforced Composites ◽  
Loading Frequency ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Self Heating

Abstract Like synthetic fiber reinforced composites, natural fiber reinforced composites possess a good potential to be used in high performance applications due to their good balance of mechanical and damping properties. Composite materials used in sporting goods equipment and automotive applications are subjected to repeating, regular loads. Therefore a clear understanding about the reliability of composite materials under fatigue/cyclic loading is important for their design in high performance applications. Currently, the fatigue performance of natural fiber reinforced composites are not well understood or characterized. The fatigue damage of flax fiber reinforced polymer matrix composites can be divided into two components: thermal damage due to self-heating in the sample and micro-mechanical damage due to damage creation (i.e. crack initiation, crack propagation, delamination, etc.). In this study, fatigue tests were conducted at four different loading frequencies and the two energy components defined were separated experimentally. The fatigue life of flax fiber reinforced composites was found to decrease with increasing loading frequency. Thermal damage due to the high self-heating temperature of the sample was found to be the main responsible form of energy which decreases fatigue life with increasing loading frequency. Micro-mechanical damage due to cyclic loading was not found to change significantly with increasing loading frequency.

scholarly journals ADVANCES IN POLYPROPYLENE BASED MATERIALS

2017 ◽  
Vol 35 (2) ◽  
Author(s):  
Gordana Bogoeva-Gaceva
Keyword(s):  
High Performance ◽  
Chemical Resistance ◽  
Natural Fiber ◽  
Fiber Reinforced Composites ◽  
Price Ratio ◽  
Reinforced Composites ◽  
Thermoplastic Polymer ◽  
Fiber Reinforced ◽  
Recent Developments ◽  
Property Modification

Polypropylene is an extremely versatile thermoplastic polymer known for its good performance/price ratio, ex-cellent heat, moisture and chemical resistance, favorable processing characteristics and recyclability. Due to its uni-versal properties, polypropylene is applied in numerous industrial fields such as electronic and electrical, automobile, textile, pipeline, etc. Furthermore, the progress in its synthesis and property modification in the last decade has con-tributed to the development of new polypropylene based materials with advanced performance. This review aims at reporting on some recent developments in polypropylene based materials, such as nanofibers, natural fiber reinforced composites, self-reinforced polypropylene and polypropylene/clay hybrids, that have replaced many types of engi-neering thermoplastics in high-performance applications.

scholarly journals Glass fiber-reinforced composites in dentistry

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Engie M. Safwat ◽  
Ahmad G. A. Khater ◽  
Ahmed G. Abd-Elsatar ◽  
Gamal A. Khater
Keyword(s):  
Glass Fiber ◽  
Glass Fibers ◽  
Dental Materials ◽  
Orientation Distribution ◽  
Clinical Situation ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Factors Affecting ◽  
Glass Fiber Reinforced

Abstract Background Enormous improvements in dental materials’ manufacturing for the aim of producing durable dental materials without compromising the aesthetic properties were developed. One of the approaches that fulfill this aim is the use of reinforcing glass fibers as fillers into dental materials, typically resin polymers, in order to obtain glass fiber-reinforced composites. Glass fiber-reinforced composite offered many advantages to the dental materials though some limitations were recorded in many literature. Methods In this review, a study of the glass fibers’ types, factors affecting the properties and the properties of glass fibers reinforced materials was carried out; in addition, research papers that experimentally studied their applications in dentistry were presented. Conclusion The success of glass fibers reinforced composites in dentistry depends on glass fibers’ composition, orientation, distribution, amount, length and adhesion; these factors once employed according to the required clinical situation would provide the essential reinforcement to the dental restorations and appliances.

A new high-performance thermoplastic polyimide and its fiber-reinforced composites

1994 ◽  
Vol 243 (2) ◽  
pp. 115-127 ◽  
Author(s):  
Bryan P. Livengood ◽  
Tammy M. Chalmers ◽  
Yi Gu ◽  
Yi-Ding Zhang ◽  
Frank W. Harris ◽  
...  
Keyword(s):  
High Performance ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced
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