ORIGINAL_ARTICLE
Marginal Adaptation And Sealing Ability Evaluation Of New Nano materials As Root End Filling Material (An Invitro Study)
Abstract Introduction: The aim of this study is evaluating marginal adaptation and sealing ability of nanoMTA and nanohydroxyapatite using bacterial microleakage method for sealing ability and scanning electron microscope (SEM) for marginal adaptation. Methods: 0ne hundred mandibular premolar extracted teeth were used in this study then divided into two subgroups fifty teeth in each according to root-end filling materials used then further subdivided into twenty-five teeth in each according to the method of assessment. Teeth were prepared using M3 Pro Gold rotary files and obturated with single cone gutta-percha and resin sealer. The apical 3mm of the roots were resected. Root-end cavity preparation were prepared and filled with nanoMTA and Nanohydroxyapatite. Group 1: bacterial microleakage assessed to NanoMTA and nanohydroxyapatite by using a model for assessment of bacterial leakage by broth changed color from red (alkaline) to yellow (acidic) as a result of acid production from bacterial growth. The samples were monitored every 24 hours for a period of 30 days. Group2: Marginal gaps between root end filling materials NanoMTA and nanohydroxyapatite with root dentin walls observed under SEM. Data were collected and statically analyzed using ANOVA tests. Results: Samples shows insignificant statistical difference between the two materials in microleakage. However, statistically significant difference at marginal gaps in nano MTA samples and nanohydroxyapatite with better results with nano MTA retrograde filling material. Conclusion: Nanohydroxyapatite might be a promising mixture to be used as a root-end filling material, as it has about the same bacterial leakage results as nanoMTA
https://edj.journals.ekb.eg/article_104714_ff256b2fe1b12e74e82f191e75d95806.pdf
2020-07-01
1829
1836
10.21608/edj.2020.25800.1082
NanoMTA
Nanohydroxyapatite
Microleakage
Marginal gap
E Faecalis
hajer
muni
hajerjurirose@yahoo.com
1
endodontic department, faculty of dentistry, MTI university, Cairo, Egypt
LEAD_AUTHOR
Mohamed
Abdel-Aziz
2
Professor of Microbial Chemistry, Microbial Chemistry Department, National Research Center, Giza.
AUTHOR
ORIGINAL_ARTICLE
Flexural Strength and Modulus of Elasticity of Two Base Materials. An In vitro Comparative study
Abstract: Objective: To determine and compare flexural strength and modulus of elasticity of two base materials. Materials and Methods: 30 specimens made of the two materials (Activa Bioactive Base and Ionoseal GI Composite Cement) were divided into two groups; 15 specimens in each group, the materials were inserted at a single increment into prefabricated Teflon mold with dimensions of 12 mm x 2 mm x 2 mm placed on a glass plate according to manufacturer’s instructions. Flexural strength and modulus of elasticity were evaluated by a 3 point bending test by using an Instron universal testing machine (0.75mm/min & 0.03Hz for hundred cycles). Displacement, Flexural stress and Load were performed for all tests. Then all data were statistically evaluated and compared. Statistical data analysis was performed for flexural fatigue through the least frequent events method. Results: There was no statistically significant difference between mean flexural strength of Activa and Ionoseal (P-value = 0.248, Effect size = 0.679). Activa showed statistically significantly lower mean modulus of elasticity than IONA (P-value = 0.015, Effect size = 1.603). Conclusion: Activa Bioactive-enhanced RMGIs demonstrated comparable flexural strength to Ionoseal glass ionomer composite cement and showed lower modulus of elasticity.
https://edj.journals.ekb.eg/article_104715_74f8820bbcf1fcdb7447cc932cf4c9a7.pdf
2020-07-01
1837
1843
10.21608/edj.2020.26757.1089
flexural strength
Modulus of elasticity
ACTIVA
Ionoseal
base
Sara
Younis
smohamed@fue.edu.eg
1
Lecturer, Department of Conservative Dentistry, Faculty of Oral and Dental Medicine, Future University in Egypt, Cairo, Egypt
LEAD_AUTHOR
Eman
Alaa
2
Lecturer, Department of Pediatric Dentistry and Dental Public Health, Faculty of Oral and Dental Medicine, Future University in Egypt, Cairo, Egypt.
AUTHOR
ORIGINAL_ARTICLE
The Influence of Bulk and Sonic Placement Techniques on Microleakage of Class II Cavities Restored with Different Resin Composites
Aim: To evaluate the microleakage of three different restorative composite resins through gingival margins of proximal boxes by dye and bacterial penetration techniques. Materials and Methods: Class II slot cavities were prepared for sixty sound human premolar teeth. The teeth were divided into 3 main equal groups of 20 teeth each. Group I cavities were restored with Filtek Z250XT and considered as control ones while those of group II and III were restored with Sonic-filled Filtek Z250XT and Tetric EvoCeram Bulk Fill, respectively. At first, all teeth were undergone thermal cycling and then each group was sub-divided into 2 subgroups of 10 teeth each; according to the microleakage technique used. Results: Monte-Carlo Statistical test showed that the three tested groups had no significant differences among them for the two techniques Conclusions: Sonic-fill technique had the least marginal leakage over the other techniques confirmed by both dye and bacterial leakage testing.
https://edj.journals.ekb.eg/article_104716_8a19b58e59dfe46a4d60347691723c9a.pdf
2020-07-01
1845
1853
10.21608/edj.2020.29011.1117
Sonic-fill
Bulk-fill
Dye microleakage
Bacterial penetration
Rabab
Mehesen
rabsenrabsen@gmail.com
1
operative dentistry, faculty of dentistry, Mansoura university, Elmansoura city, Egypt
LEAD_AUTHOR
Laila
Amin
aminlaila81@gmail.com
2
departement of oral biology, faculty of dentistry, Mansoura university
AUTHOR
Marmar
Montaser
marmar1659@gmail.com
3
department of operative dentistry, faculty of dentistry, Mansoura university, Egypt
AUTHOR
ORIGINAL_ARTICLE
Microtensile bond strength of TTEMA/TEGDMA remineralizing adhesive to early carious enamel lesions
Objectives: Resin adhesive could be used as a carrier of nano-hyrdoxy apatite particles added to treat early enamel caries. The aim of this study was to evaluate microtensile bond strength of a remineralizing enamel infiltrant to early carious enamel lesion. Methods: An artificial caries model was used to induce early partially-cavitated enamel caries-like lesion in maxillay centrals. Nano hydroxyapatite particles (nHA) were applied in two forms to a low shrinkage low viscosity resin adhesive: particles were directly added to resin adhesive or silanated before addition. Unmodified ad-hesive was used as control. Micro-tensile bond strength (MTBS) was performed to evaluate bond strength to demineralized enamel after application of the remineralizing resin adhesive (n=20, α=0.05). Scanning electron microscopy (SEM) was performed to assess mode of failure and to study infiltrant-enamel interface. Results: Direct addition of nano-particles resulted in significant reduction (F=32, P<0.001) in MTBS (19 MPa ± 3.8) compared to addition of silanated particles (24 MPa ± 3.2) which presented comparable values to the unmodified enamel infiltrant (26 MPa ± 4.1). SEM image analysis revealed adhesive failure observed for directly added particles while the other two groups demonstrated cohesive failure observed in the resin adhesive. On the other hand, direct addition of nHA resulted in partial remineralization of enamel (42% recovery in calcium content). Conclusions: TTEMA/TEGDMA enamel infiltrant could be used as a carrier for nano hydroxyapatite particles without compromising bond strength to early carious enamel lesions.
https://edj.journals.ekb.eg/article_104717_b802dcab7c408290d8bb5edd6cd572aa.pdf
2020-07-01
1855
1862
10.21608/edj.2020.28400.1135
MTBS
SEM
Bond
caries
interface
mon
ghoniem
khaledhosien@hotmail.com
1
Operative, Faculty Of Detistry, Alex. University
LEAD_AUTHOR
Moustafa
Aboushelib
info@aboushelib.org
2
Professor of Biomaterials, Faculty of Dentistry, Alexandria University, Egypt.
AUTHOR
ORIGINAL_ARTICLE
Comparison of Antibacterial Effect and Smear Layer Removal of Herbal versus Traditional Irrigants - An in vitro Study
Background: Elimination of endodontic pathogens through appropriate cleaning and shaping procedures along with strict isolation protocols is of great significance for disinfecting this complex anatomy of the root canal configuration. Persistent periradicular lesions are usually associated with Enterococcus faecalis. Various compounds are being utilized as irrigants throughout the cleaning shaping procedures to accomplish the favorable level of disinfection. Aim: the current study aim to compare the anti-microbial efficiency of Salvadora Persica (Miswak-Siwak) and Chitosan in comparison with Sodium Hypochlorite (NaOCl). Also comparing their ability to eradicate the smear layer. Materials and Methods: Seventy-five extracted human single rooted teeth were cut at the cemento-enamel junction (CEJ). The roots were instrumented by k-files till size 25. These teeth were sterilized and then contaminated by Enterococcus Faecalis in brain heart infusion for 3 weeks. The samples will divide into 4 groups (S.Persica, Chitosan, NaOCl and normal saline). The bacterial count was calculated using colony forming unit (CFU). Then, the roots were split longitudinally and examined by SEM for evaluation of smear layer removal in coronal, middle and apical thirds. Results: Regarding antibacterial effect, NaOCl showed the least mean values, however saline showed the highest, followed by S. Persica and Chitosan. Regarding smear layer removal, S.Persica showed the least values. NaOCl and positive control showed the highest, followed by Chitosan. Conclusion: The use of herbal alternatives as root canal irrigating solutions might prove to be advantageous considering several unfavorable properties of NaOCl. Key words: Antibacterial efficacy, Chitosan, Enterococcus faecalis, Root canal irrigation, S.Persica, NaOCl.
https://edj.journals.ekb.eg/article_104718_6b8e19bf5b07cda6f949a707487892d9.pdf
2020-07-01
1863
1871
10.21608/edj.2020.28284.1104
Herbal
irrigants
Antimicrobial
Mahmoud
Badr
mahmoud.badr@hotmail.com
1
Department of Endodontics, Faculty of Dentistry, Future University in Egypt.
Cairo, Egypt
LEAD_AUTHOR
ElSaeed
Elhafez
saidabdelhafiz@yahoo.com
2
Department of Endodontics, Faculty of Dentistry, Future University in Egypt. Cairo, Egypt
AUTHOR
ORIGINAL_ARTICLE
ASSESSMENT THE IMPACT OF MORINGA OLEIFERA EXTRACTS AND ASCORBIC ACID SOLUTION AS ANTIOXIDANTS ON MICROSHEAR BOND STRENGTH OF RESIN COMPOSITE TO BLEACHED BOVINE ENAMEL (IN VITRO STUDY)
Objective: The study was conducted to assess the impact of Moringa Oleifera and ascorbic acid on microshear bond strength of composite resin to bleached Enamel. Methods: Twenty-five bovine incisors were divided into five groups of 5 teeth each; Group I : Where no bleaching was done and no antioxidants were used , Group II: Where bleaching was done, but no antioxidants were used, Group III (Positive control group): Bleaching followed by treatment with 10 % Ascorbic acid solution for 10 minutes, Group IV : Bleaching followed by treatment with 80 % ethanol extract of Moringa Oleifera for 10 minutes, Group V: Bleaching followed by treatment with 80 % methanol extract of Moringa Oleifera for 10 minutes. Resin composite was applied on enamel surfaces of all groups. The microshear bond strength were evaluated for all groups. Results: The results revealed statistically significant difference between the five groups where the highest mean value (17.34 Mpa) was recorded for (Group I; No bleaching) followed by (9.22 Mpa) was recorded for (Group III; Ascorbic Acid treatment after bleaching). The least mean value (4.41 Mpa) was recorded for (group II; No antioxidant after bleaching). No statistically significant difference was found between (Group III) and (Group IV). Conclusion: Using 10 % Ascorbic acid solution could reverse the reduced bond strength after bleaching and Ethanol extract of Moringa Oleifera can be a future candidate to be used as antioxidant solution after bleaching. KEYWORDS: Antioxidants, Microshear bond test, Ascorbic acid , Moringa Oleifera , At office bleaching.
https://edj.journals.ekb.eg/article_104719_dd61225b505a60d061197a99b6c6baf9.pdf
2020-07-01
1873
1882
10.21608/edj.2020.28657.1126
antioxidants
Microshear bond test
ascorbic acid
Moringa Oleifera extracts
At office bleaching
Mona
Mohamed
shaabanmona@yahoo.com
1
Operative Dentistry Department , Faculty of Oral and Dental Medicine ,Ahram Canadian university,Cairo,Egypt
AUTHOR
Nawal
Aidaros
nawalaidaros500@hotmail.com
2
Conservative Dentistry department, Dentistry faculty, Ahram Canadian University. 6th october Egypt
LEAD_AUTHOR
ORIGINAL_ARTICLE
Bonding Effectiveness of Bioactive Self-Adhesive Restorative Material to Enamel and Dentin Using Different Bonding Protocols
Objective: To investigate microshear bond strength of bioactive restorative material to enamel and dentin bonded using universal adhesive in etch and rinse and self-etch mode stored for 24h and 6 m. Methods: Sound bovine incisors were used in this study. ACITVA Bioactive restorative (Pulpdent Corp., Watertown, MA, USA) and Single Bond Universal adhesive (3M ESPE, St.Paul, MN, USA) were used. Teeth were grouped into 6 grouped according to bonding protocol (No bonding agent, bonding in etch and rinse mode and bonding in self-etch mode) and tooth substrate (enamel and Dentin). Specimens were stored for either 24 h or 6 m. Microshear bond strength (µSBS) were tested using universal testing machine and micromorphological observation of the interface were investigated using ESEM. Data were tabulated and statistically analyzed using Two-way ANOVA followed by Bonferroni’s post-hoc test. Results: Enamel bonded in etch and rinse mode recorded the highest µSBS values at both storage periods. Dentin at 24 h showed no significant difference between etch and rinse and self-etch modes while after 6 m, etch and rinse protocol showed significant drop. Control group recorded the lowest µSBS at all experimental groups. Conclusion: Use of bonding agents is recommended with ACITVA to both enamel and dentin. Universal adhesives are preferred in etch & rinse mode with enamel and self-etch mode with dentin. ACITVA is able to preserve bond strength upon storage except for dentin bonded in etch and rinse mode.
https://edj.journals.ekb.eg/article_105797_da473a57bf3917234c0cc3d895054910.pdf
2020-07-01
1883
1892
10.21608/edj.2020.33054.1152
Bioactive material
Microshear bond strength
Bonding protocols
Etch and rinse
self-etch
Mayada
Sultan
mayadasaid@hotmail.com
1
Lecturer, Operative Dentistry Department, Faculty of dentistry, Fayoum University
LEAD_AUTHOR
Maha
ElKorashy
mek11@fayoum.edu.eg
2
Associate Professor, Operative Dentistry Department, Faculty of Dentistry, Fayoum University.
AUTHOR
Ahmed
Fawzy
ahmed_fawzy@dent.suez.edu.eg
3
assistant Professor, Operative Dentistry Department, Faculty of Dentistry, Suez Canal University.
AUTHOR
ORIGINAL_ARTICLE
Antimicrobial Efficacy of Nanopropolis Coated Vs Silver-Curcumin Nanoparticles Coated Gutta-Percha Points on Various Microbial Species. A Comparative In Vitro Study
Introduction: Nanopropolis, nanosilver and curcumin have a wide antimicrobial action range. They are to be tested as a gutta-percha coating. Objectives: Comparing the antimicrobial efficacy of silver-curcumin nanoparticles versus nanopropolis coated gutta-percha against Enterococcus faecalis, Staphylococcus aureus, Escherichia coli and Candida albicans and assessing the continuity of both coatings. Materials and Methods: Suspensions of both materials were loaded on filter discs, placed on the surface of agar plates inoculated with tested microbes and incubated for 24 hours. Gutta-percha cones were inserted in Eppendorf tubes containing the tested materials for 24 hours, placed on the surface of agar plates inoculated with the tested microbes and incubated for 24 hours. The antimicrobial activity of the discs was determined by measuring the diameter of the inhibition zone whereas it was measured by positive response and its degree around gutta-percha. Coated gutta-percha cones were scanned under scanning electron microscope to assess the continuity of the coating. Results: Mean and Standard Deviation of the inhibition zone diameter for Silver-curcumin nanoparticles around discs were 12.35±0.71mm for E.faecalis, 20.6±0.39mm for S.aureus, 14.6±0.61mm for E.coli and 18.2±0.67mm for C.albicans. For nanopropolis they were 8.95±0.69mm for E.faecalis, 15.4±0.7mm for S.aureus, 9.75±0.86mm for E.coli and 14.8±0.63mm for Candida. The inhibition zones around gutta-percha were more pronounced for Silver-curcumin nanoparticles. Statistically significant difference was found between the inhibitory effect of silver-curcumin nanoparticles and nanopropolis against all tested microorganisms P
https://edj.journals.ekb.eg/article_105800_8b7846e8d31c88804b9f2c5e96f8d735.pdf
2020-07-01
1893
1902
10.21608/edj.2020.31338.1132
E. faecalis
Staphylococcus aureus
Candida albicans
Nanoparticles
Gutta-percha
Hajer
Abd El Hamid
hajerjurirose@yahoo.com
1
endodontic department, faculty of dentistry, MTI university, Cairo, Egypt
LEAD_AUTHOR
Mohamed
Abdel-Aziz
mohabomerna@yahoo.com
2
microbial chemistry department, national research centre, dokki-12622, cairo,egypt
AUTHOR
Fatma
Abu Naeem
fatma.abunaeem@dentistry.cu.edu.eg
3
endodontic department, faculty of dentistry, cairo university, egypt
AUTHOR
ORIGINAL_ARTICLE
Fracture resistance of premolars restored with bulk fill resin composite versus incrementally packed resin composite: In Vitro study
Objectives: to evaluate fracture resistance of premolars restored with bulkfill resin composite restorative material or incrementally-packed resin composite after 24 hours and after one month storage. Methods:40 freshly extracted maxillary premolars were chosen, mounted in acrylic resin blocks and grouped into group A1 and A2, referring to the type of composite resin restoration to be used after preparing standardized MOD cavities which were bulkfill (Tetric N-Ceram Bulk) and incrementally-packed (Tetric N-Ceram) (control) respectively. Each of which was subdivided into S1 and S2 according to the storage period which was either 24 h or 30 days respectively in normal saline. All specimens were subjected to compressive axial loading until fracture in Instron Universal Testing Machine. Three Way ANOVA followed by Tukay’s post-hoc test were used for statistical analysis. Results: There was no statistically significant difference in fracture resistance values of teeth restored either by bulkfill or incrementally-packed resin composite. Different storage periods also had no statistically significant effect on the fracture resistance values of teeth restored with either type of resin composite. Conclusions: Within the limitations of this study it can be concluded that fracture resistance of restored premolars was not affected by either the type of resin composite used nor by the storage period. Clinical significance: Bulkfill resin composite can be used as a comparable filling material to the conventional type.
https://edj.journals.ekb.eg/article_105798_6b419ca813f2100536f51a6b815ecc20.pdf
2020-07-01
1903
1913
10.21608/edj.2020.33292.1151
Bulkfill
additive composite
incremental packing
Dina
Al-Sherbini
dina.attia@dentistry.cu.edu.eg
1
Conservative Dentistry, Faculty of Dentistry, Cairo University, Egypt
LEAD_AUTHOR
Heba
Hamza
heba.hamza@dentistry.cu.edu.eg
2
Professor of Conservative Dentistry, Faculty of Dentistry, Cairo University, Egypt.
AUTHOR
Asma’a
Aly
asmaayassen5@gmail.com
3
Assistant professor of Conservative Dentistry, Faculty of Dentistry, Cairo University, Egypt.
AUTHOR