journal
https://read.qxmd.com/read/28959753/effect-of-green-tea-extract-as-antioxidant-on-shear-bond-strength-of-resin-composite-to-in-office-and-home-bleached-enamel
#21
JOURNAL ARTICLE
Sharafeddin F, Farshad F, Azarian B, Afshari A
STATEMENT OF PROBLEM: Shear bond strength (SBS) of home and office bleached enamel will be compromised by immediate application of composite restoration. Antioxidant agent may overcome this problem. OBJECTIVES: This in vitro study assessed the effect of green tea extract on shear bond strength of resin composite to in-office and home-bleached enamel. MATERIALS AND METHODS: In this experimental study, 40 extracted intact human incisors were embedded in cylindrical acrylic resin blocks (2...
September 2016: Journal of Dental Biomaterials
https://read.qxmd.com/read/28959752/chemical-stability-of-bioglass-in-simulated-oral-environment
#22
JOURNAL ARTICLE
Moazzami Sm, Sadid Zadeh R, Kianoush K, Sarmad M, Barani Karbaski F, Amiri Daluyi R, Kazemi Rb
STATEMENT OF PROBLEM: Bioglasses are a series of biocompatible dental materials, which are considered as light conducting inserts in resin composite restorations. Consequently, their chemical stability is more essential when they are used in conjunction with resin composite. OBJECTIVES: The aim of this study was to evaluate and compare the chemical stability of Bioglass with dental porcelain and resin composite by determining the amount of released K+, Na+, Ca2+ ions and silicone elements from these materials as a result of exposure to tested solutions with different pH levels including: Sodium Bicarbonate [SB, (pH=9...
September 2016: Journal of Dental Biomaterials
https://read.qxmd.com/read/28959751/relevance-of-micro-leakage-to-orthodontic-bonding-a-review
#23
REVIEW
Karandish M
As it is seen, by passing the evolutionary process of banding of orthodontic attachments to the bonding ones, orthodontics have witnessed many developments, such as application of new adhesives, optimized base designs, new bracket materials, curing methods and more efficient primers. The studies often address the morphological, micro-leakage, and shear bond tests to evaluate bond efficacy. Among studies endeavored to develop the bond strength of brackets, some observed the reduction of micro-leakage of bracket-adhesive and enamel-adhesive interfaces...
September 2016: Journal of Dental Biomaterials
https://read.qxmd.com/read/28959750/comparison-of-wear-resistance-of-hawley-and-vacuum-formed-retainers-an-in-vitro-study
#24
JOURNAL ARTICLE
Moshkelgosha V, Shomali M, Momeni M
STATEMENT OF PROBLEM: As a physical property, wear resistance of the materials used in the fabrication of orthodontic retainers play a significant role in the stability and long term use of the appliances. OBJECTIVES: To evaluate the wear resistance of two commonly used materials for orthodontic retainers: Acropars OP, i.e. a polymethyl methacrylate based material, and 3A-GS060, i.e. a polyethylene based material. MATERIALS AND METHODS: For each material, 30 orthodontic retainers were made according to the manufacturers' instructions and a 30×30×2 mm block was cut out from the mid- palatal area of each retainer...
June 2016: Journal of Dental Biomaterials
https://read.qxmd.com/read/28959749/the-effect-of-four-commonly-used-root-conditioner-agents-in-different-time-periods-applied-on-periodontally-diseased-and-healthy-teeth
#25
JOURNAL ARTICLE
Torkzaban P, Seyedzadeh Sabounchi S
STATEMENT OF PROBLEM: Root surface contamination or infection can potentially change the consequences of regenerative periodontal therapies and therefore the modification and disinfection of the contaminated root surfaces are necessary. OBJECTIVES: This study aimed to compare the surface characteristics of the extracted human teeth after exposure to four root conditioners in different time periods. MATERIALS AND METHODS: The study samples were prepared from 40 freshly extracted teeth including 20 affected teeth with periodontal diseases and 20 healthy teeth...
June 2016: Journal of Dental Biomaterials
https://read.qxmd.com/read/28959748/assessing-the-effect-of-dental-implants-thread-design-on-distribution-of-stress-in-impact-loadings-using-three-dimensional-finite-element-method
#26
JOURNAL ARTICLE
Zarei I, Khajehpour S, Sabouri A, Haghnegahdar Az, Jafari K
STATEMENT OF PROBLEM: Impacts and accidents are considered as the main fac- tors in losing the teeth, so the analysis and design of the implants that they can be more resistant against impacts is very important. One of the important nu- merical methods having widespread application in various fields of engineering sciences is the finite element method. Among its wide applications, the study of distribution of power in complex structures can be noted. OBJECTIVES: The aim of this research was to assess the geometric effect and the type of implant thread on its performance; we also made an attempt to determine the created stress using finite element method...
June 2016: Journal of Dental Biomaterials
https://read.qxmd.com/read/28959747/the-effect-of-different-polishing-methods-and-storage-media-on-discoloration-of-resin-composites
#27
JOURNAL ARTICLE
Deljoo Z, Sadeghi M, Azar Mr, Bagheri R
STATEMENT OF PROBLEM: Accumulation of plaque and staining due to a rough surface, and penetration of colourant agents from food and beverages in to the resin composite results in an incomplete polymerization. There is a little information on the effect of finishing and polishing techniques on the discoloration of nanohybrid and microhybrid composites when exposed to staining solutions. OBJECTIVES: To determine the degree of surface staining of nanohybrid and microhybrid composites after polishing and immersion in distilled water and two commonly used staining solutions...
June 2016: Journal of Dental Biomaterials
https://read.qxmd.com/read/28959746/marginal-micro-leakage-of-self-etch-and-all-in-one-adhesives-to-primary-teeth-with-mechanical-or-chemo-mechanical-caries-removal
#28
JOURNAL ARTICLE
Nouzari A, Zohrei A, Ferooz M, Mohammadi N
STATEMENT OF PROBLEM: Chemo-mechanical caries removal is an effective alternative to the traditional rotary drilling method. One of the factors that can influence micro-leakage is the method of caries removal. OBJECTIVES: To compare the micro-leakage of resin composite in primary dentition using self-etch and all-in one adhesives following conventional and chemo-mechanical caries removal. MATERIALS AND METHODS: Sixty extracted human primary anterior teeth with class III carious lesions were collected...
June 2016: Journal of Dental Biomaterials
https://read.qxmd.com/read/28959745/concentration-of-calcium-phosphate-and-fluoride-ions-in-microbial-plaque-and-saliva-after-using-cpp-acp-paste-in-6-9-year-old-children
#29
JOURNAL ARTICLE
Poureslami Hr, Hoseinifar Ra, Hoseinifar Re, Sharifi H, Poureslami P
STATEMENT OF PROBLEM: Dental caries is one of the most common chronic diseases in children. The balance between demineralization and remineralization of the decayed teeth depends on the calcium and phosphate content of the tooth surface. Therefore, if a product such as casein phospho peptides - amorphous calcium phosphate (CPP- ACP) which can significantly increase the availability of calcium and phosphate in the plaque and saliva should have an anti-caries protective effect. OBJECTIVES: The purpose of this study was to evaluate the concentration of calcium, phosphate and fluoride in the plaque and saliva of children before and after applying the CPP-ACP paste...
June 2016: Journal of Dental Biomaterials
https://read.qxmd.com/read/28959744/gingival-retraction-methods-for-fabrication-of-fixed-partial-denture-literature-review
#30
REVIEW
Safari S, Vossoghi Sheshkalani Ma, Vossoghi Sheshkalani Mi, Hoseini Ghavam F, Hamedi M
Fixed dental prosthesis success requires appropriate impression taking of the prepared finish line. This is critical in either tooth supported fixed prosthesis (crown and bridge) or implant supported fixed prosthesis (solid abutment). If the prepared finish line is adjacent to the gingival sulcus, gingival retraction techniques should be used to decrease the marginal discrepancy among the restoration and the prepared abutment. Accurate marginal positioning of the restoration in the prepared finish line of the abutment is required for therapeutic, preventive and aesthetic purposes...
June 2016: Journal of Dental Biomaterials
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