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Pits and fissures have been considered as the single most important feature leading to the development of occlusal caries; About 90 % of carious lesions are found in the pits and fissures of permanent posterior teeth .Several materials and techniques have been developed to enhance the longevity of pit-and-fissure sealants, including the use of flowable composite resins as pit-and-fissure sealants
Pits and fissures have been considered as the single most important feature leading to the development of occlusal caries; About 90 % of carious lesions are found in the pits and fissures of permanent posterior teeth . The complex morphology of occlusal pits and fissures makes them an ideal site for retention of bacteria and food remnants, rendering the performance of proper hygiene difficult or even impossible .
Several materials and techniques have been developed to enhance the longevity of pit-and-fissure sealants, including the use of flowable composite resins as pit-and-fissure sealants . However, the clinical longevity of flowable composite as fissure sealants is directly related to their retention, where the percentage of rate of retention differ on a 12-month follow-up examination were the partial loss rate of flowable composite material ranges from 15.5% to 16.5% and total loss were ranged from 12.7% to 13%, while on a 24-month follow-up examination the partial loss rate ranged from 18.1% to 20% and total loss rate ranged from 15.6% to 17%, and that depends on morphology of pits and fissures, adequate isolation, conditioning of enamel, application techniques, particular material characteristics like viscosity, surface tension, adequate adhesion and penetration of the material into the previously etched system of fissures.
In order to overcome the shortcomings of traditional dental composites, nanofibers or nanotubes fillers are broadly used in the academia and industry. The type of Nanofibers and Nanotubes used to reinforce dental resin composites include polymeric nanofibers, metallic nanofibers, and inorganic hydroxyapatide (HAP) nanofibers. The Hydroxyapatite Nanofibers are calcium phosphates fillers that allow the release of mineral from dental resin composite. Also HAP nanofibers possessing sufficiently high slenderness ratios and relatively long and thin structure, and create a lot of bonding points in the interface with polymeric matrix. When the composites suffer from huge pressure this allow tremendous stress transfer from weak polymeric matrix to tough HAP nanofibers; and consequently increase the mechanical properties of resin composite. So this study will examine the effect of adding HAP nanofibers on the clinical performances and retention rate of flowable resin composite.
Retention Rate of Flowable Composite in Demenerlized Pits and Fissure
Hydroxyapatite Nanofiber reinforced flowable composite, conventional resin-based flowable composite
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Published on BioPortfolio: 2017-08-28T19:53:21-0400
Evaluation of Marginal Integrity of Hydroxyapatite Nano-Fiber Reinforced Flowable Composite Versus Conventional Resin-Based Flowable Composite in Initially Demineralized Pits and Fissure: A One Year, Randomized Clinical Trial
This study will be conducted to evaluate the Marginal integrity of Hydroxyapatite Nanofiber reinforced flowable composite compared to a conventional resin-based flowable composite during m...
The aim of this study is to evaluate long-term clinical performance of a self-adhering flowable resin composite in comparison with a conventional flowable resin composite used with an etch...
The aim of this study is to evaluate the clinical performance of three different bulk-fill restorative resin materials; a bulk fill resin composite, a flowable bulk fill resin composite an...
clinical performance of short fiber reinforced resin composite versus indirect nanohybrid resin composite onlay restorations in complex proximal cavities of molar teeth will be evaluated o...
Clinical performance of direct fiber reinforced resin composite restorations versus direct microhybrid resin composite restorations in endodontically treated molars will be evaluated over ...
This article presents a case report for the treatment of a patient with a flared root. The patient was treated with a bulk-fill flowable composite. This innovative approach seems to be efficient in re...
The purpose of the study is to evaluate the bacterial micro-leakage of three different materials, mineral trioxide aggregate (MTA), resin-modified glass ionomer cement (RMGIC), and flowable composite,...
Monitoring water content and predicting the water-induced drop in strength of fiber-reinforced composites are of great importance for the oil and gas and marine industries. Fourier transform infrared ...
BACKGROUND The aim of this study was to evaluate the elution of BisGMA, UDMA, TEGDMA, and HEMA monomers from flowable bulk fill composite resins with different resin matrix compositions, polymerized i...
The aim of this study was to quantify the internal void volume formation in commercially available, resin composites inserted using conventional or sonic insertion methods, and analyzed using three-di...
Composite materials composed of an ion-leachable glass embedded in a polymeric matrix. They differ from GLASS IONOMER CEMENTS in that partially silanized glass particles are used to provide a direct bond to the resin matrix and the matrix is primarily formed by a light-activated, radical polymerization reaction.
Therapeutic practices which are not currently considered an integral part of conventional allopathic medical practice. They may lack biomedical explanations but as they become better researched some (PHYSICAL THERAPY MODALITIES; DIET; ACUPUNCTURE) become widely accepted whereas others (humors, radium therapy) quietly fade away, yet are important historical footnotes. Therapies are termed as Complementary when used in addition to conventional treatments and as Alternative when used instead of conventional treatment.
A strongly basic anion exchange resin whose main constituent is polystyrene trimethylbenzylammonium Cl(-) anion.
A schedule prescribing when the subject is to be reinforced or rewarded in terms of temporal interval in psychological experiments. The schedule may be continuous or intermittent.
Learning situations in which the sequence responses of the subject are instrumental in producing reinforcement. When the correct response occurs, which involves the selection from among a repertoire of responses, the subject is immediately reinforced.
Dentistry is the study, management and treatment of diseases and conditions affecting the mouth, jaw, teeth and their supporting tissues (Oxford Medical Dictionary) The work of a dentist ranges from regular patient check-up to orthodontics and surgery....
Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism ...
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...