Suez Canal University, Faculty of Dentistry
Dental Science Updates
2636-3836
2636-3844
1
1
2020
03
01
Comparative Evaluation of Chlorhexidine and Sodium Hexametaphosphate Mouth Rinses on Dental Plaque in Children: A randomized clinical trial.
1
13
EN
Diana
Sabri
Hedihed
General Dental Practioner in the Ministry of Health. B.D.S. Suez Canal University 2009
dianasabri11@gmail.com
Mohamed
Shrief
Farag
Professor of Pediatric and Preventive Dentistry and Dental Public Health
Faculty of Dentistry - Suez Canal University
msherifsfarag@gmail.com
Shadeed
Gad
Abdelrahman
Associate Professor of Pharmaceutics and Industrial Pharmacy. Faculty of Pharmacy - Suez Canal University
shadeed@gmail.com
Shaimaa
Mohamed
Omer
Lecturer of Pediatric and Preventive Dentisrty and Dental Puplic Health. Faculty of Dentistry - Suez Canal University
hkmssm@yahoo.com
Asmaa
Abd-elkariem
Hashem
Lecturer of Medical Microbiology and Immunology, Faculty of Medicine, Suez Canal University
asmamicro@yahoo.com
10.21608/dsu.2020.13848.1002
Abstract:<br /> Introduction: The use of a mouthwash augments mechanical removal of plaque by brushing and flossing and helps maintain oral health through its antiplaque and antibacterial chemical properties.<br /> Aim: to evaluate and compare clinically and microbiologically the effectiveness of chlorhexidine and sodium hexametaphosphate mouth rinses on dental plaque in children.<br /> Materials and methods: This randomized clinical trial included 40 normal apparently healthy and cooperative children aged 8 to 10 years and selected from the Outpatient Dental Clinic of Pediatric dentistry Department, Faculty of Dentistry, Suez Canal University. Children were randomly divided into 2 groups as follows: Group I: included (20) children who rinsed with Chlorhexidine )0.2%) and Group II: included (20) children who rinsed with Sodium Hexametaphosphate (7% ). Clinical evaluation was performed by measuring gingival and plaque indices scores at all evaluation periods. Microbiological evaluation was performed by direct examination of bacterial cultures.<br /> Results: Sodium hexametaphosphate 7% mouth rinse showed a superior effect compared to chlorhexidine 0.2% mouth rinse in terms of improvement in the clinical scores and decreasing the microbial counting.<br /> Conclusion: Sodium hexametaphosphate 7% mouth rinse is a promising candidate of mouthwashes.
chlorhexidine,Dental plaque,lactobacillus,Sodium Hexametaphosphate,Streptococcus mutans
https://dsu.journals.ekb.eg/article_74718.html
https://dsu.journals.ekb.eg/article_74718_683821cc130c353021c4491278dad690.pdf
Suez Canal University, Faculty of Dentistry
Dental Science Updates
2636-3836
2636-3844
1
1
2020
03
01
Effect of Surface Treatments on the Color Change and Shear Bond Strength of Porcelain Laminate Veneer
15
22
EN
Passant
Tarek
Abdelhamid Hafez
2A teeba buildings zahraa almaadi cairo egypt
poso_mouse@hotmail.com
mosaad
Elgabarouny
fixed prosthodontics, faculty of dentistry, suez canal university
dr.mosaad@yahoo.com
latifa
Abdelgawad
Oral Laser Application Department
National Institute of Laser Enhanced Sciences - Cairo University
latifagawad@gmail.com
amr
shebl
fixed prosthodontics, faculty of dentistry, suez canal university.
amsheblks@gmail.com
10.21608/dsu.2020.14074.1003
Effect of Surface Treatments on the Color Change and Shear Bond Strength of Porcelain Laminate Veneer<br /> Aim of the study: the purpose of this Invitro study to evaluate the effect of surface treatments on the color change and shear bond strength of lithium disilicate glass ceramic veneers.<br /> Materials & Methods: Twenty square samples with dimensions (8x8x2) and another twenty samples with smaller dimensions (4x4x2) were cut from five IPS e-max CAD blocks of shade A3. The discs were divided into two groups: 1) Half of the small and large blocks were subjected to hydrofluoric acid (HF); 2) the other half was subjected to Co2 laser irradiation. The conditioned samples were subdivided according to the bonding agent: A) Silane application for 60 seconds; B) Single bond universal light cured for 10 seconds. Each small sample was cemented on the top of a large sample using Rely-x veneer cement with translucent shade. The color change was measured using spectrophotometer. The shear bond strength was tested using a universal testing machine. <br /> Results: HF resulted in higher bond shear bond strength and ΔE than Co2 laser. Single bond universal resulted in higher shear bond strength values than silane. <br /> Conclusion: HF followed by either single bond universal or silane could be the best surface treatment for e-max CAD ceramic. However, Co2 laser could be a promising alternative surface treatment.
Keywords: Co2 laser,Hydrofluoric acid,Lithium Disilicate
https://dsu.journals.ekb.eg/article_74719.html
https://dsu.journals.ekb.eg/article_74719_f3c31176b147efb1a0a06cb04db94097.pdf
Suez Canal University, Faculty of Dentistry
Dental Science Updates
2636-3836
2636-3844
1
1
2020
03
01
Evaluation of the Shear Bond Strength of Two Types of Adhesive Resin Cements to Zirconia after Surface Treatment using Silica Coating
23
30
EN
Ahmed
Mohamed
Elsantawi
crown and bridge department
faculty of dentistry
suez canal university
madodent@yahoo.com
mosaad
Elgabarouny
fixed prosthodontics, faculty of dentistry, suez canal university
dr.mosaad@yahoo.com
Diaa
Saad
Lecturer in Crown and Bridge Department- Faculty of dentistry- Suez Canal University
dsaad7@hotmail.com
Amr
Shebl
Lecturer in Crown and Bridge Department - Faculty of dentistry - Suez Canal University
amrsheblks@gmail.com
10.21608/dsu.2020.14819.1005
Aim: to evaluate the shear bond strength of zirconia bonded with two self etch adhesive resin cements Panavia F2.0 and Bistite ΠDC using two surface treatment techniques:sand blasting and silica coating using Cojet system.<br /> Materials & Methods: Twenty rectangular samples with dimensions (14.5×13×3.6mm) and twenty samples with dimensions (7.2×6×3.6mm) were cut from three zirconia ceramic blocks. Sandblasting was done using air blasting machine with 110 µm AL2O3 particles and Silica coating surface treatment was done using Cojet system with 30 µm SiO2 particles. Half of the small sandblasted zirconia samples were cemented to half the sand blasted large samples using PANAVIA F 2.0 adhesive resin cement and the rest were cemented using BISTITE ΠDC adhesive resin cement. Also, half of the small silica coated zirconia samples were cemented to half the silica coated large samples using both cements. Thermocycling were done for 5000 thermal cycles. The shear bond strength was tested using a computerized universal testing machine.<br /> Results: Zirconia specimens cemented with Panavia F2.0 showed higher shear bond strength than specimens cemented with Bistite ΠDC and the zirconia surfaces treated with silica coating and sand blasting surface treatments<br /> Conclusion: Panavia F2.0 resin cement and silica coating surface treatment could be the best cement and surface treatment for zirconia and sand blasting could be a promising alternative surface treatment.
Keywords: Sand blasting,silica coating,Zirconia,adhesive resin cement
https://dsu.journals.ekb.eg/article_74720.html
https://dsu.journals.ekb.eg/article_74720_8ab6f34aca2bdbed854f6b234fe53e77.pdf
Suez Canal University, Faculty of Dentistry
Dental Science Updates
2636-3836
2636-3844
1
1
2020
03
01
Effect of Two Resin Infiltration on Color Masking of Artificial Enamel White Spot Lesion Using Different Pretreatment Methods. (An in Vitro Study)
31
38
EN
noha
taher
hagag
operative department,faculty of dentistry, horus university, new damietta
noohataher@gmail.com
Ola
M. Ibrahim
Fahmy
Professor of Operative Dentistry-
Head of Restorative
Dentistry Department, Faculty
of Oral and Dental
Medicine,
Emad
Abd El-Fattah
Abo Alazm
Associate Professor of Operative
Dentistry (former)- Faculty
of Dentistry - Suez Canal
University
10.21608/dsu.2020.14906.1006
Purpose: This study aimed at investigating the masking effect and depth of penetration of two resin infiltrants (ICON ® and unfilled adhesive resin) on artificial white spot lesions after different pretreatment methods (15% hydrochloric acid, 37% phosphoric acid and air abrasion through micro etcher) <br /> Materials and methods: Artificial white spot lesions were produced in enamel slabs from 60 freshly extracted permanent human anterior teeth (extracted from diabetic patients). The samples were divided into two main groups: resin infiltrant; ICON ® (B1) and adhesive resin bond; ONE-STEP® Universal Dental Adhesive (B2). Each group was subdivided into three subgroups according to the pretreatment used; (HCl 15%) was applied in (A1), (H3PO4 37%) was applied in (A2) and aluminum oxide particles (50/90 µm), through micro etcher was applied in (A3). The assessment of colour was performed by a spectrophotometer in three distinct stages: baseline, after the production of artificial caries and after infiltration treatment expressed in L*, a* and b* values. To analyze measurement results, the chromatism value, ΔE was used to quantify the overall differences of the colors. <br /> Results: All the test groups showed no statistically signifiant differences between each other where the highest value was recorded with the adhesive bond after micro-etching 2.250 ± 0.192 and the lowest value was recorded with the adhesive bond after HCl pre-treatment 1.710 ± 0.244 (Statistical significance is achieved when the P-value ≤ 0.05).<br /> Conclusion: Both tested infiltrants reacted similarly and the three tested pretreatment methods were equally effective.
Key words: white spot lesion,Resin infiltration,Icon,air abrasion,Spectrophotometer
https://dsu.journals.ekb.eg/article_74721.html
https://dsu.journals.ekb.eg/article_74721_05494954748fe44cd1c682cfa17e5bf0.pdf
Suez Canal University, Faculty of Dentistry
Dental Science Updates
2636-3836
2636-3844
1
1
2020
03
01
Apical Debris Extrusion and Root Canal Cleanliness Using Several Rotary Nickel Titanium Files with Different Kinematics In Round and Oval Canals.
39
49
EN
alsayed
ghamry
abu hammad
seso_dentist@yahoo.com
Reem
Mohamed
Lecturer in Endodontics, Faculty of Dentistry, Suez Canal University.
rabdelgawad@taibahu.edu.sa
Dalia
Fayad
0000-0003-1822-0143
Professor of Endodontics
Faculty of Dentistry, Suez Canal University
daliafayyad222@yahoo.com
10.21608/dsu.2020.16448.1009
Aim: this study was conducted to evaluate and compare the amount of apically extruded debris and canal wall cleanliness using different Ni-Ti instruments (ProTaper file F2, Twisted File 25 and Reciproc R 25) used in continuous rotation and reciprocating motion, in round and oval root canals. Materials and methods: One hundred twenty extracted single rooted teeth were divided into two groups according to the cross section; 60 round and 60 oval cross section. Each group was subdivided into three subgroups according to the file system (20 ProTaper, 20 Twisted File and 20 Reciproc). Each subgroup was further divided into two divisions according to the motion used (10 rotation and 10 reciprocation). Teeth were mounted in glass vials through holes in the rubber stoppers. The glass vials were weighed before instrumentation. Root canal preparation was performed according to its assigned system according to the manufacturer's instructions, and distilled water was used as root canal irrigant. After instrumentation, the amount of apically extruded debris was evaluated by weighing the samples on the microbalance. Thereafter, roots were longitudinally divided for evaluation of smear layer by Scanning Electron Microscope SEM. The data were tabulated and subjected to statistical analysis. Results: Reciprocating motion extruded more debris than continuous rotation motion. SEM examination revealed greater amount of smear layer in the oval cross section canal than round cross section canal.
Apically extruded debris,Canal wall cleanliness,NiTi instruments,oval canals,reciprocation,Rotation and Round canals
https://dsu.journals.ekb.eg/article_74962.html
https://dsu.journals.ekb.eg/article_74962_76d31e93b4ad93ae6a3ebd6168d7ae0b.pdf
Suez Canal University, Faculty of Dentistry
Dental Science Updates
2636-3836
2636-3844
1
1
2020
03
01
Shear Bond Strength of Composite Repair Material to Ceramo-metallic and zirconium Restorations Using A New Adhesive System
51
62
EN
Mohamed
Maarof
Fixed prothodontics , faculty of dentistry, Suez canal university,egypt
drmmm86@hotmail.com
mosaad
Elgabarouny
fixed prosthodontics, faculty of dentistry, suez canal university
dr.mosaad@yahoo.com
Amr
Shebl
Lecturer in Crown and Bridge Department - Faculty of dentistry - Suez Canal University
amrsheblks@gmail.com
Rania
Badawy
Dental Material Department-Faculty of Dentistry-Suez-Canal University
rania_bdwy@yahoo.com
10.21608/dsu.2020.16645.1010
Introduction: success of ceramic repair system is dependent on integrity of bond between ceramic and resin composite.<br /> Aim: evaluate shear bond strength (SBS) of composite repair material to ceramo-metallic and zirconium restorations using new adhesive system after thermocycling.<br /> Materials and methods: 28 square specimens of metal , zirconia , veneering porcelain for metal (VMK95) and veneering porcelain for zirconia (VM9) were prepared (1 x 1 x 0.5 cm) and divided into 4 groups: 1)metal (M) group , 2)zirconia (Z) group , 3)veneering porcelain for metal (VPM) group , 4)veneering porcelain for zirconia(VPZ) group). Then M and Z groups were sandblasted while VPM and VPZ groups were subjected to HF acid. Single bond universal adhesive were applied to exposed surface of all groups then repair composite material was built up incrementally over center of exposed surface using cylindrical teflon mold ( 3 x 5 mm), stored for 7 days in distilled water followed by 1000 thermocycles then SBS was tested. <br /> Results: Highest SBS value between composite repair material and M group followed by Z group and composite repair material then VPM group and composite repair material then VPZ group and composite repair material.<br /> Conclusions: Sandblasting and application of single bond universal adhesive containing MDP can be recommended for repair metal and zirconium surfaces with composite material. HF acid etching and application of single bond universal adhesive containing MDP can be recommended for repair VPM and VPZ with composite repair material. <br /> Keywords: single bond universal adhesive, veneering porcelain, zirconia
single bond universal adhesive,veneering porcelain,Zirconia
https://dsu.journals.ekb.eg/article_74964.html
https://dsu.journals.ekb.eg/article_74964_5563161c8b924ae79a13b9ad4c7bfdee.pdf
Suez Canal University, Faculty of Dentistry
Dental Science Updates
2636-3836
2636-3844
1
1
2020
03
01
The Potential Impacts of Gold Nanoparticles on the Mucous Membrane of the Albino Rats' Tongues
63
73
EN
Mai
Osman
El-Halwagy
Oral Biology Department, Faculty of Dentistry, Sinai University, Ismaillia, Egypt
maielhalwagy1412@gmail.com
Laila
Sadek
Ghali
Professor Oral Biology, Faculty of Oral and Dental Medicine, Cairo University
Dean of Faculty of Dentistry, Sinai University, Kantara branch, Egypt
laila.sadek@su.edu.eg
Mervat
Mohamed
Youssef
Head of Department of Oral Biology, Faculty of Dentistry, Suez Canal University
dr.mervathawas@gmail.com
Enas
Mahmoud
Hegazy
0000-0001-6131-3535
Department of Oral Biology, Faculty of Dentistry, Suez Canal University
enashegazy@yahoo.com
10.21608/dsu.2020.16899.1011
Abstract <br /> Introduction: With the growing interest in the applications of gold nanoparticles (AuNPs) in biotechnology and their physiological effects, possible toxicity of gold nanoparticles is becoming an increasingly important issue. It was shown that the toxicity is both dose- and size-dependent, and the AuNPs of higher concentration would cause more cytotoxicity. Objectives: The aim of this work was to study the toxic effect of intraperitoneal administration of gold nanoparticles -if any- on the mucous membrane of the tongues of albino rats and the possibility of one-month recovery period. Material and methods: Forty-six male albino rats were used in the present investigation. They were divided into the following groups: Group (1) (16 rats) served as controls, they received the solvent of AuNPs intraperitoneally daily for 21 days. Group (2) (15 rats) received 10mg/kg body weight of AuNP solution intraperitoneally daily for 21 days. Group (3) (15 rats) were treated the same way as Group 2 for 21 days and then left for one-month as a recovery period. Results: Examination of the tongue of the rats which were exposed to gold nanoparticles solution revealed atrophic and degenerative changes of both the dorsal and ventral surfaces of the tongue as well as the lingual salivary glands. The examined tongues of the rats which were allowed a recovery period showed improvement in the histological picture. Conclusion: Exposure to over dose of AuNPs causes atrophic and degenerative changes. A recovery period of one-month can lead to regeneration and improvement in the histological picture.
Gold nanoparticles,Biodistribution,Histological examination,Reactive oxygen species,tongue papillae,toxicity
https://dsu.journals.ekb.eg/article_74966.html
https://dsu.journals.ekb.eg/article_74966_39cb99b9d8febb059a0c3b3866da0389.pdf