scholarly journals Eugenol-based temporary luting cement possesses antioxidative properties

2014 ◽  
Vol 142 (11-12) ◽  
pp. 669-674 ◽  
Author(s):  
Dragan Ilic ◽  
Kosovka Obradovic-Djuricic ◽  
Djordje Antonijevic ◽  
Tatjana Todorovic
Keyword(s):  
Dental Materials ◽  
Study Groups ◽  
Biological Tissues ◽  
Gingival Tissue ◽  
Liquid Component ◽  
Dental Cement ◽  
Antioxidative Properties ◽  
Dental Restorations ◽  
Luting Cement ◽  
Anti Inflammatory

Introduction. Antioxidants protect against reactive oxygen species and expose beneficial anti-inflammatory activity when in contact with biological tissues. Dental materials that are used as temporary luting on fixed dental restorations are often in contact with injured gingival tissue, hence they should contain anti-inflammatory characteristics that are essential after prosthetic procedures preceding cementation of final restauration. Objective. The aim of this study was to investigate the antioxidant effect through the oxidation inhibition (OI) of mixed dental cement for temporary luting or their liquid component. Methods. Eight study groups were prepared each by ten samples: 1) ex tempore preparation of zinc-oxide eugenol paste (Kariofil Z Galenika, Serbia), 2) Viko Temp paste (Galenika, Serbia), 3) Temp Bond NE paste (Kerr, Germany), 4) ScutaBond (ESPE, Germany), 5) Cp-CAP paste (Germany, Lege Artis) and oil component of 6) Kariofil Z, 7) Viko Temp and 8) Cp-CAP. The samples were subjected to spectrophotometer to measure OI 2,2?-azino-di-(3-ethyl-benzthiazoline-6-sulphonic acid) (ABTS) using Randox kit, United Kingdom. The control samples were pure ascorbic acid (1% w/v). Results. High values of OI exposed materials (groups 1, 5, 6, 7, 8) with content of eugenol (or its derivates) in the range of 100-88.8% were statistically more significant than the values of non-eugenol substances (groups 2, 3, 4) with the range of 8.2-43.5%. Conclusion. Eugenol containing temporary fixation materials show significant antioxidative properties and therefore they may be used in those clinical situations where surrounding gingival tissue is injured during restorative procedure.

scholarly journals Hydroxyapatite Formation on a Novel Dental Cement in Human Saliva

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Johanna Engstrand ◽  
Erik Unosson ◽  
Håkan Engqvist
Keyword(s):  
Photoelectron Spectroscopy ◽  
Dental Materials ◽  
Grazing Incidence ◽  
Human Saliva ◽  
Dental Cement ◽  
X Ray ◽  
Luting Cement ◽  
Natural Formation ◽  
High Standards ◽  
The Stability

Dental materials have to meet high standards regarding mechanical strength and handling properties. There is however only a limited amount of research that has been devoted to natural formation of hydroxyapatite (HA) in contact with the materials. The objective of the current investigation was to study the surface reactions occurring in human salvia on a novel dental cement. Ceramir Crown & Bridge, a bioceramic luting agent intended for permanent cementation of conventional oral prosthetics, was evaluated by immersing discs made from the cement in human saliva and phosphate buffered saline (PBS) for seven days, after which they were dried and analyzed. The analytical methods used in order to verify HA formation on the surface were grazing incidence X-ray diffraction (GI-XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). All results showed that HA was formed on the surfaces of samples stored in saliva as well as on samples stored in PBS. The possibility of a dental luting cement to promote natural formation of HA at the tooth interface increases the stability and durability of the system and could help prevent secondary caries.

scholarly journals Rheological and Mechanical Properties of Resin-Based Materials Applied in Dental Restorations

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2975
Author(s):  
Xinyuan Zhang ◽  
Qi Zhang ◽  
Xin Meng ◽  
Yuting Ye ◽  
Daoshuo Feng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Strength ◽  
Dental Materials ◽  
Dental Bonding ◽  
Dental Filling ◽  
The Past ◽  
Dental Restorations ◽  
Luting Cement ◽  
Light Curing ◽  
Dental Restorative

Resin-based materials have been prevalent for dental restorations over the past few decades and have been widely used for a variety of direct and indirect procedures. Typically, resin-based dental materials are required to be flowable or moldable before setting and can provide adequate mechanical strength after setting. The setting method may include, but is not limited to, light-curing, self-curing or heating. In this review, based on different indications of resin-based dental materials (e.g., dental filling composite, dental bonding agent, resin luting cement), their rheological and mechanical properties were reviewed. Viscous and flexible properties were focused on for materials before setting, while elastic properties and mechanical strength were focused on for materials after setting. At the same time, the factors that may affect their rheological and mechanical properties were discussed. It is anticipated that the insightful information and prospections of this study will be useful to the future development and fabrication of resin-based dental restorative materials.

Numerical Analyses of Stresses and Strains in Bone – Implant Assembly

2013 ◽  
Vol 583 ◽  
pp. 169-174 ◽  
Author(s):  
Raluca Monica Comăneanu ◽  
Horia Mihail Barbu ◽  
Daniel Vlasceanu ◽  
Mihai Tarcolea
Keyword(s):  
Biological Tissues ◽  
Late Complications ◽  
Subsequent Treatment ◽  
Main Function ◽  
Functional Design ◽  
Bone Implant ◽  
Dental Restorations ◽  
Clinical Observations ◽  
Static Mechanical ◽  
Implant System

Numerous clinical observations performed on patients who have achieved dental restorations on implants drew attention to the risk of immediate or late complications. The most common late complications are lost of implant components and fracture of implant. While loss of screw only produce patient discomfort, implant fracture lead to more serious complications and subsequent treatment is extremely difficult. The causes of these complications are static mechanical failure of the implant system and overloading of the assembly [1]. The main function of dental implants is to transfer the load to the surrounding biological tissues. Therefore, the first objective of functional design is to dissipate and distribute biomechanical loads, in order to optimize function on prosthesis built on implants.

scholarly journals Evaluations of Two Reinforced Polymers Used as Metal-Free Substructures in Fixed Dental Restorations

2018 ◽  
Vol 55 (1) ◽  
pp. 33-37 ◽  
Author(s):  
Carmen Biris ◽  
Edwin Sever Bechir ◽  
Anamaria Bechir ◽  
Farah Curt Mola ◽  
Adrian Viorel Badiu ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Oral Health ◽  
Dental Materials ◽  
Evaluation Criteria ◽  
Prosthetic Rehabilitation ◽  
Reinforced Polymers ◽  
Metal Free ◽  
Dental Restorations ◽  
Comparative Results

The development of new classes of dental materials determined the apparition of reinforced polymers, as BioHPP and Trinia, used for core in non-metallic prosthetic restorations, including in implants non-metallic superstructure. The purpose of the study was to present the results of the comparative clinical trials referring to the use of BioHPP and Trinia resins as core in fixed prosthetic rehabilitation. The researches were performed on 33 patients in which we realized 71 fixed prosthetic restorations. According to the six evaluation criteria used in research, we conducted biannual monitoring meetings over two and half years period for registrations of comparative results in the use of these two reinforced polymers as core. The results of the study demonstrated that both type of these materials exhibit a certain degree of elasticity and presents many advantages, therefore these represent a beneficial acquisition in patients oral health.

scholarly journals Comparative study of the comfort in patients rehabilitated with three types of partial dentures

2019 ◽  
Vol 2 (2) ◽  
pp. 223-228
Author(s):  
Farah Bechir ◽  
Ilinca Suciu
Keyword(s):  
Oral Cavity ◽  
Silicone Rubber ◽  
Dental Materials ◽  
Biological Tissues ◽  
Flexible Polymers ◽  
Color Changes ◽  
The Third ◽  
Acrylic Resins ◽  
Comfort Levels ◽  
Dental Technician

AbstractIntroduction: At present, the researchers are targeted to improve and increase the biocompatibility of dental materials that are in direct contact with biological tissues. The biocompatibility of the dental materials that contact the tissues of the oral cavity present relevance for the patient, clinician, dental technician, and manufacturer.Aim of the study: The aim of this study was represented by the comparative research regarding the comfort of the patients wearing removable partial prostheses with clasps made of wire and flexible polymers.Material and Methods. Patients wearing partial dentures from Meliodent heat-cured acrylic resins with wipla wire clasps, flexible partial dentures made from Valplast and dentures with clasps of CuSil silicone rubber participated in this study. The research was performed on 3 groups, of 8 patients each, in which comfort levels (according to 5 criteria) were determined, after 6, 12, 18, respectively 24 months of the partial removable prostheses insertion in the oral cavity.Results. Presence of decubitus lesions of the oral mucosa in the clasps areas was noticed mostly in the Valplast polyamide dentures (37.5%), existence of color changes at the base of prostheses and of clasps area appeared in 37.5% of the third group (CuSil PAD) patients, no patient included in the study presented allergic reactions and at the third and fourth recall, only 1 patient of all groups complained of unpleasant taste in the oral cavity.Conclusion. The removable prosthetic restorations with clasps made of flexible polymers and CuSil gaskets of silicone rubber, although initially much more comfortable and therefore much better accepted by patients, after two years were no longer active, could not be activated and necessited technical restorations, compared to those made of wipla wire clasps, which were activated with pliers, or, in the case of fracture, were replaced by the technician in the dental laboratory.

The anti-inflammatory effects of erythromycin, clarithromycin, azithromycin and roxithromycin on histamine-induced otitis media with effusion in guinea pigs

2018 ◽  
Vol 132 (7) ◽  
pp. 579-583 ◽  
Author(s):  
B Ersoy ◽  
B Aktan ◽  
K Kilic ◽  
M S Sakat ◽  
S Sipal
Keyword(s):  
Otitis Media ◽  
Middle Ear ◽  
Guinea Pigs ◽  
Otitis Media With Effusion ◽  
Study Groups ◽  
Control Group ◽  
Middle Ear Mucosa ◽  
Anti Inflammatory ◽  
The Right ◽  
Better Than

AbstractBackgroundOtitis media with effusion is a clinical manifestation characterised by inflammation of middle-ear mucosa. This study investigated the therapeutic effect of erythromycin, clarithromycin, azithromycin and roxithromycin on a histamine-induced animal model of otitis media with effusion.MethodsThe animals were divided into five groups, receiving erythromycin, clarithromycin, azithromycin, roxithromycin or saline solution. The guinea pigs in the study groups received erythromycin (40 mg/kg/day), clarithromycin (15 mg/kg/day), azithromycin (10 mg/kg/day) or roxithromycin (10 mg/kg/day) for 3 days by gastric tube. Four hours after the end of the administration, histamine solution was injected into the right middle ear.ResultsThe lowest neutrophil density value obtained using stereological techniques was in the azithromycin group (0.86 ± 0.25 × 10−5/μm3), while the highest value was observed in the control group (6.68 ± 3.12 × 10−5/μm3). The anti-inflammatory properties of clarithromycin, azithromycin and roxithromycin were similar to one another, but better than that of erythromycin.ConclusionThe use of macrolide antibiotics is recommended, as they show antibacterial and anti-inflammatory efficacy in otitis media with effusion.

Anti-inflammatory and antioxidative properties of helicid protect against CCl4 induced acute liver injury in mice

2020 ◽  
Vol 95 (7) ◽  
pp. 483-489
Author(s):  
Shuang Chen ◽  
Chun-Lei Zhang ◽  
Xiao-Fei Zhou ◽  
Yu Gao ◽  
Hao Chen ◽  
...  
Keyword(s):  
Liver Injury ◽  
Acute Liver Injury ◽  
Antioxidative Properties ◽  
Anti Inflammatory

Evidence for anti-inflammatory and antioxidative properties of dried plum polyphenols in macrophage RAW 264.7 cells

2015 ◽  
Vol 6 (5) ◽  
pp. 1719-1725 ◽  
Author(s):  
Shirin Hooshmand ◽  
Ajay Kumar ◽  
Ji Yao Zhang ◽  
Sarah A. Johnson ◽  
Sheau C. Chai ◽  
...  
Keyword(s):  
Raw 264.7 Cells ◽  
Raw 264.7 ◽  
Prunus Domestica ◽  
Antioxidative Properties ◽  
Anti Inflammatory

This study presents the anti-inflammatory and antioxidative properties of dried plum (Prunus domesticaL.) polyphenols in macrophage RAW 264.7 cells.

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