2024-03-29T17:43:23Z
https://adjalexu.journals.ekb.eg/?_action=export&rf=summon&issue=15964
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
THE EFFECT OF OSSEODENSIFICATION TECHNIQUE ON IMPLANT STABILITY (CLINICAL TRIAL)
Ahmed
Ibrahim
Sherif
Ayad
Adham
ElAshwah
Introduction: Dental implants primary or initial stability originates from the engagement with the cortical bone mechanically, whereas the secondary stability signifies the stability biologically by means of osseointegration through the bone formation and remodeling from the cancellous bone. Osseodensification is an innovative biomechanical technique to prepare the site. It uses Densifying Burs to produce low plastic deformation owing to its non-removal densifying method of site preparation, which preserves the bone enhancing the host site. Objectives: To evaluate the osseodensification (OD) technique used in implant site preparation by using the newly designed burs (Densah burs), and its effect on enhancing implant primary and secondary stability. Material and Methods: Twenty dental implants were placed in ten patients; each patient received one implant using the new Osseodensification drilling technique and one implant using the conventional drilling technique in the posterior maxillary ridge. Osstell was used in measuring resonance frequency (ISQ-scale) which is used to determine the amount of implant stability. Results: The results showed a significant improvement in both primary and secondary stability using densah burs. Conclusions: Densah burs produce better bone quality around the implant than conventional drills, and therefore, there is an improvement in the primary and secondary stability.
osseodensification
Densah
Dental implants
implant stability
in Vitro
2020
08
01
1
7
https://adjalexu.journals.ekb.eg/article_86758_1b05c0e5c6e42a3f36e948a3e23bc859.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
THE EFFICACY OF COMBINING ADVANCED PLATELET-RICH FIBRIN TO BIPHASIC ALLOPLAST IN MANAGEMENT OF INTRABONY DEFECTS (RANDOMIZED CONTROLLED CLINICAL TRIAL)
Jaylane
Ghonima
Mohy El Din
El Rashidy
Gehan
Kotry
Hams
Abdelrahman
Introduction: Advanced platelet-rich fibrin (A-PRF) is one of the most recently developed platelet concentrates and believed to have a great impact in regeneration for its richness in leukocytes, platelets, stem cells and cytokines. Biphasic calcium phosphate (BCP) alloplast is a well-known synthetic bone substitute widely used in periodontal regeneration. Objectives: To evaluate the additive effect of A-PRF to BCP in regeneration of intrabony defects. Material and Methods: Twenty two interproximal, intrabony defects in 22 patients with moderate to severe chronic periodontitis were allocated to one of the two groups of this study. Group I (test) was treated with open flap debridement followed by placing A-PRF and BCP with a ratio of 1:1, while group II (control) was filled only by BCP mixed with saline after open flap debridement (OFD). Plaque index (PI), modified gingival index (MGI), probing depth (PD) and clinical attachment level (CAL) were evaluated at baseline, 3, 6 and 9 months. Results: Compared to baseline all evaluated parameters showed improvement at the end of the study in both groups. Changes from baseline to 9 months in A-PRF/BCP group were insignificantly greater compared to BCP/saline group regarding reduction of PI (0.54±0.72 vs 0.53±0.92), MGI (0.34±0.68 vs 0.32±0.78), PD (2.27±0.71mm vs 2.04±0.96mm) and CAL gain (2.13±1.02mm vs 1.68±1.23mm). However, intergroup differences were insignificant. Conclusions: Based on results of this study, combining advanced platelet-rich fibrin to biphasic alloplast mixture was more advantageous than using BCP alone in intrabony defect management.
Advanced platelet-rich fibrin
biphasic alloplast
intrabony defects
periodontal management
2020
08
01
8
13
https://adjalexu.journals.ekb.eg/article_86766_756f7b51e0f8b3d0315cfea24736a90e.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
EVALUATION OF MICROLEAKAGE OF SILVER NANOPARTICLE-ADDED PIT AND FISSURE SEALANT IN PERMANENT TEETH (IN-VITRO STUDY)
Sarah
Khairy
Magda
El-Tekeya
Niveen
Bakry
Mostafa
Aboshelib
Introduction: Silver has long been recognized for its antimicrobial effect on a wide spectrum of microorganisms. Consequently, silver nanoparticles became among the most common therapeutic nanoparticles under research in the field of caries prevention. Pit-and-fissure sealants are among the major components in the field of caries prevention which could have an additional antibacterial benefit through silver nanoparticles addition. Objectives: The aim of the study was to evaluate, in-vitro, the marginal seal of silver nanoparticle-added pits and fissure sealant in comparison to the conventional sealant in permanent teeth. Materials and methods: Thirty sound premolar teeth extracted for orthodontic purposes were randomly assigned into two main groups; Group I (n=15) for silver nanoparticle-added ClinproTM sealant and Group II (n=15) for the conventional ClinproTM sealant. Silver nanoparticle-added sealant was prepared by mixing the contents of one syringe of ClinproTM sealant to silver nanopowder of particle size 50-80nm at a concentration of 6.25μg/ml. For microleakage testing, after sealant application and thermocycling for 500 thermal cycles, the sealed teeth was immersed into 1% methylene blue solution for 24h, sectioned longitudinally in a bucco-lingual direction and then examined under stereomicroscope for dye penetration assessment at x60 magnification. Results: Using Mann Whitney U test there was no statistically significant difference in microleakage between both groups (P= 0.325) Conclusion: Addition of silver nanoparticles to pit-and-fissure sealant did not affect its sealing ability.
caries
Pit-and-fissure sealants
silver nanoparticles
Microleakage
2020
08
01
14
18
https://adjalexu.journals.ekb.eg/article_86763_fa57e127a1e8c47c5b907205f684ed26.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
CONE BEAM COMPUTED TOMOGRAPHY (CBCT) IN GENDER DETERMINATION THROUGH MENTAL FORAMEN POSITION IN AN EGYPTIAN POPULATION SAMPLE (A RETROSPECTIVE STUDY)
Esraa
Elmekkawy
Yousria
Gaweesh
Rania
Fahmy
Wael
Safwat
Introduction: Identification and determination of gender of unknown human skeletal remains has been one of the most challenging tasks for forensic dentistry. Objective: To assess the role of cone beam computed tomography (CBCT) in gender determination through the measurements of the location of the mental foramen in in a sample of the Egyptian population. Material and Methods: Two measurements were performed in 200 CBCT images 2 measurements were performed; distance from the upper border of mental foramen to the lower border of the mandible and distance from the lower border of mental foramen to the lower border of the mandible in the right side of each CBCT image. Obtained data were statistically analyzed using t-test to compare between the two genders. Results: The two measurements were significantly higher in males.
CBCT
gender determination
linear measurements
mental foramen
2020
08
01
19
23
https://adjalexu.journals.ekb.eg/article_86765_90ce44cb6e0e9be2794da60a4185bc45.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
EVALUATION OF IMMEDIATE BASAL IMPLANTS PLACEMENT IN MAXILLARY PREMOLAR REGION
Shaymaa
Warda
Riham
Eldibany
Marwa
Noureldin
Introduction: Dental implants have become an integral part of comprehensive management of dental patients. The clinical immediate replacement of lost teeth by osseointegrated implants have been one of the most significant advances in dentistry. Basal dental implants where developed for immediate use. Objectives: This study was designed to evaluate immediate placement of basal dental implants in maxillary premolar region. Materials and methods: Thirteen basal dental implants placed in ten adult patients having maxillary premolar tooth or remaining root indicated for extraction, all patients were operated under local anaesthesia, atraumatic extraction using a periotome was performed then the tooth was removed using the forceps, mesial and distal incisions were done, an osteotomy was done, the basal dental implant was placed then stability was measured by periotest, clinical evaluation and radiographic follow up using cone beam C.T ware done. Results: Thirteen implants were placed and followed up both clinically and radiographically for 6 months. In our study, the range of implant stability using periotest was -7.9 to +6.2 immediately, while after 6 months, the range of implant stability was -8.0 to +3.7. Conclusion: Basal dental implants are a reliable option for immediate placement after extraction of maxillary premolar teeth with good flap, suturing and reinforcing on maintaining good oral hygiene.
stability
maxilla
Immediate placed implants
Basal dental implants
2020
08
01
24
31
https://adjalexu.journals.ekb.eg/article_86760_4a3fd9c1bcd6f59391b01622102e6b44.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
EFFECT OF DIFFERENT DOSES OF VITAMIN D3 SUPPLEMENTATION ON MANDIBULAR BONE IN RATS
Radwa
Abdel-khalek
Hanaa
Aly
Samia
Omar
Mounir
El-Adawy
Introduction: vitamin D is one of the most important biological regulators of calcium metabolism which ultimately promotes healthy bones. It is also helpful in reducing inflammation as well as enhancing immune functions and cell growth. Despite its importance, its deficiency is prevalent worldwide. Moreover, it is difficult to obtain this vitamin from diet because it is not present in many foods. Consequently, Vitamin D3 (cholecalciferol) supplementation is nowadays used worldwide to maintain optimal bone health. However, studies evaluating the effect of standard doses of vitamin D supplements on bone have been inconsistent. In addition, the effects of higher doses have not been revealed and needs further studies. Aim of the study: to determine the effect of supplementation of varying doses of dietary vitamin D3 on the structure of mandibular bone in albino rats. Materials and methods: Thirty adult female rats were randomly divided into three groups: Group I control, while Group II and Group III received daily dose of vitamin D3 (400 IU/Kg) and (1000 IU/Kg) respectively. All rats were fed on same diet. After 6 weeks animals were euthanized and their mandibles were dissected out. The effects of each dose of vitamin D3 on the mandibular bone structure were assessed by scanning electron microscope and energy dispersive X-ray microanalysis. Results:After6 weeks, Group I control and Group II supplemented with 400 IU/day, showed loss of its normal cortical bone smoothness. Moreover, the trabecular bone showed wide bone marrow spaces with thin trabeculae. However, group III supplemented with 1000 IU/day, showed smoother and more uniform cortical bone surface with wider trabeculae and narrower marrow spaces compared to the other groups. Conclusion: This study showedthatadministration of vitamin D3 (1000 IU/day) enhanced bone architecture in adult rats.However, the administration of 400 IU/day showed slight enhancement in bone structure.
vitamin D3
Cholecalciferol
Bone architecture
Scanning electron microscope
2020
08
01
32
37
https://adjalexu.journals.ekb.eg/article_86764_7e805e5f2a8d74ad2bcec6bddc7a1fde.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
IMMUNOHISTOCHEMICAL VALIDATION OF INSULIN-LIKE GROWTH FACTOR II mRNA-BINDING PROTEIN 3 (IMP3) AS A DIAGNOSTIC MARKER IN SALIVARY GLAND TUMORS
Nourhan
Abou Madawi
Sahar
El Sheikh
Sahar
Riad
Gamal
Swaify
Enas
Omar
Introduction: Salivary gland tumors (SGTs) are infrequent tumours accounting for 2-6.5% of all head and neck tumors. They show various clinical behaviours and different histological patterns resulting in a diagnostic dilemma. Insulin like growth factor II RNA binding protein 3 (IMP3) is an oncofetal protein that plays an important role in tumor invasion and metastases. Several studies proved the prognostic role of IMP3 in different human cancers. However, its role in SGTs still needs to be confirmed. Objectives: To evaluate IMP3 immunoexpression in benign and malignant SGTs. Material and Methods: IMP3 expression was measured in 44 SGT cases (20 benign and 24 malignant) and 10 normal salivary gland tissues (NSGT). Immunohistochemical (IHC) staining was carried out by the Labeled Strept-Avidin Biotin complex method (LSAB). Results: IMP3 expression was detected in NSGT as well as benign and malignant SGTs with different intensities. The Lowest expression levels were detected in NSGT, while the highest ones were detected in Malignant SGTs. Conclusion: IMP3 could be used as a diagnostic marker in SGTs.
salivary gland tumors
IMP3
immunohistochemical marker
prognosis
2020
08
01
38
43
https://adjalexu.journals.ekb.eg/article_86767_47a27fbc02ef906564a01c3708bde08c.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
UPPER AIRWAY VOLUMETRIC CHANGE FOLLOWING THE USE OF TWO CAD/CAM ORAL APPLIANCES FOR TREATMENT OF OBSTRUCTIVE SLEEP APNEA
Mervat
Abd Ellah
Faten
Abbas
Mohamed
Khamis
Nashwa
Abdel Wahab
Amr
Ekram
Introduction: Obstructive sleep apnea (OSA) is a condition in which there is repetitive and intermittent occlusion of the upper airway (UA) during sleep. OSA can be treated through; continuous positive airway pressure (CPAP), surgery, or oral appliances. Mandibular Advancement Appliance (MAA) is considered a valid alternative, which can be the first choice in simple snorers and mild-moderate OSA. MAA can be either custom-made or non-custom-made, one-piece or two-piece, titratable or non-titratable. While Monoblock designs permit no mouth opening, two-piece appliances vary in permissible lateral jaw movement and in the coupling mechanisms which attach the two plates together. Objectives: measuring the change in UA volume after the use of two different designs of MAA (Monoblock and Biblock) Materials and methods: Twenty patients with diagnosed OSA were divided randomly into two equal groups: Monoblock group ; received Monoblock MAA fabricated using CAD/CAM technique at different advancement levels; 50% then 75% of maximum advancement, Biblock group; received Biblock MAA fabricated using CAD/CAM technique at different advancement levels; 50% then 75% of maximum advancement. UA volume of all patients were evaluated after three months of acclimatization of each stage of advancement through Cone-Beam Computed Tomography (CBCT). Results: Biblock group showed statistically significant increase in UA volume at 75% mandibular advancement level, compared to Monoblock group (p=.001). There was statistically significant increase in UA volume percentage change from baseline to 50% advancement (p=.016), and also from baseline to 75% advancement (p=.001) in favor to Biblock MAA. Conclusions: Both Monoblock and Biblock MAA produced statistically significant increase in UA volume of OSA patients. Biblock MAA with elastics presented statistically significant favorable increase in UA volume in relation to Monoblock MAA.
sleep apnea
biblock appliance
mandibular advancement
airway measurement
monoblock appliance
2020
08
01
44
51
https://adjalexu.journals.ekb.eg/article_86768_35d4c6010d4cdcfc6e185ebdc1daa705.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
REMINERALIZATION EFFECT OF EGG SHELL POWDER AND NOVAMINE ON INITIAL CARIES-LIKE LESIONS IN YOUNG PERMANENT TEETH (IN-VITRO STUDY)
Eman
Mohamed
Aly
Sharaf
Dalia
Talaat
Dina
Nagui
Introduction: Despite the cariostatic effect of fluoride, the continuous use of fluoridated toothpastes increases the risk of dental fluorosis. Therefore, new safe alternative technologies of teeth remineralization must be introduced to arrest dental caries and remineralize the early enamel carious lesions. Objectives: The aim of the study was to evaluate the remineralizing effect of eggshell powder and novamine on initial caries-like lesions in young permanent teeth compared to fluoride. Material and Methods: A total of 96 permanent teeth were selected. Each Tooth was coated with nail varnish, leaving squares of 4x4 mm. Each tooth was sectioned into 2 halves longitudinally in a buccolingual direction through the center of the window to obtain a mesial and a distal half (192 specimens). One half was treated and the other half was remained untreated to serve as its negative control. Teeth were assigned into three groups according to treatment agent; group I (eggshell powder solution), group II (novamine toothpaste) and group III (fluoride toothpaste) .Specimens were immersed in the demineralizing solution for 72 hours to produce artificial carious lesions on the exposed enamel surface. Results: There was a statistically significant mean microhardness and lesion depth values between test subgroups IA (eggshell powder), IIA (novamine) and their controls (P<0.001). There was no statistically significant difference in mean microhardness and lesion depth values between the test subgroup IIIA (fluoride) and its control (P>0.001). There was statistically significant difference in mean percent difference values of enamel microhardness among three groups (P<0.001). There was no statistically significant difference in mean percent difference values of lesion depth between the three groups (P>0.001). Conclusions: Both eggshell powder and novamine were effective for remineralization of initial caries-like lesions of young permanent teeth.
remineralization
Eggshell powder
novamine
fluoride
2020
08
01
52
59
https://adjalexu.journals.ekb.eg/article_86761_419fed002eca80b62f6d44401a8ed9f0.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
EVALUATION OF SUCCESS OF SINGLE DRILLING IMPLANT SYSTEM (CLINICAL AND RADIOGRAPHIC STUDY)
Emad
Senada
Samraa
El Sheikh
Mervat
Khalil
Introduction: Preparation of the implant osteotomy has been classically performed using drills of various shapes to conform the site to the implant's geometry. Drilling procedures may cause not only mechanical trauma to the bone but also heat-induced bone necrosis, thus representing a significant risk for failed osseointegration. As an alternative single drilling osteotomy is a technique that allows effective bone cutting with minimally traumatic procedures and less heat generation. Objectives: Evaluation of single drilling implant site preparation in affecting implant stability and crestal bone loss that takes place around the implant. Material and Methods: The study was conducted on thirteen patients having missing posterior mandibular teeth indicated for implant restoration. All implants were placed using single drilling osteotomy. After 3 months, final crowns were delivered. All implants were followed for 6 months. Clinically, each patient was evaluated for pain, swelling and stability of the implant. Radiographically, cone beam computed tomography (CBCT) was used for the assessment of marginal bone level and bone density. Results: There was a significant increase in bone density from immediate postoperative to the end of the 6 months. The mean of marginal bone level from immediately post-operative to the 3rd month was significant and from immediate to 6th month was significant. One case displayed swelling in the first week and the implant was removed (failure case) due to lack of oral hygiene maintenance by the patient. Conclusions: Single drilling osteotomy was a successful treatment procedure, with satisfactory clinical outcomes, and a low incidence of complications.
dental implant
implant site preparation
surgical drills
single drilling implant
2020
08
01
60
66
https://adjalexu.journals.ekb.eg/article_86759_b8288d28a4aabcb646402c4a71aceb1a.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
THE EFFECT OF DEEP THREADS ON THE STABILITY OF DENTAL IMPLANTS IN POSTERIOR MAXILLA
Sara
Hamed
Ahmed
Shaaban
Riham
El-Dibany
Introduction: Stability of dental implant is a prerequisite for obtaining successful osseointegration especially in regions with cancellous bone as the posterior maxilla. Implant macrodesign affects the implant stability especially thread design. Dental implant with deep threads favours a better engagement with the cancellous bone and this results in high primary stability. Objectives: The aim of this study was to evaluate clinically and radiographically the effect of implant thread depth on primary stability in low density bone. Materials and Methods: A clinical study was performed on a total of ten patients with missing maxillary premolars and molars. The sample was selected conveniently to fulfill a list of inclusion and exclusion criteria. All implants were followed up 6 months. Clinically, each patient was evaluated for pain, tenderness or discomfort, presence of swelling or infection and mobility of the implant. Implant stability and assessment of osseointegration progress was conducted using the resonance frequency analysis technique (Osstell) immediately after implant placement, after four months and after 6 months. Results: There was statistically significant increase in stability at 6th month postoperatively when compared with immediately measures (p=0.011). Conclusions: The use of a newly developed implant with a specific macrodesign of knife threads geometry in posterior region of maxilla, showed high primary stability.
Dental implants
posterior maxilla
Knife threads
stability
2020
08
01
67
73
https://adjalexu.journals.ekb.eg/article_88440_4c1bf1eabb151bf972da2ceaf1159466.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
A METHOD FOR DIGITAL QUANTIFICATION OF EOSINOPHILS INFILTRATE IN ORAL SQUAMOUS CELL CARCINOMA
Rania
Younis
Introduction:The recent advances in tumor immunotherapy triggered more attention towards analysis of tumor inflammation. Oral squamous cell carcinoma (OSCC) is malignancy that can be therapeutically challenging and resistant to treatment. Further investigation of the inflammatory profile in OSCC can enhance our understanding of the disease and hence patient response to immunotherapy. Eosinophils are suggested to play a significant role in tumor progression and have been described to be associated with advanced stage malignancies of several tumor subtypes. Objective: Here we wanted to assess a methodology to quantitatively measure eosinophils infiltrate in OSCC. Material and methods: Eosinophils infiltrate was analyzed in formalin fixed paraffin embedded tissue (FFPE) microarray cores of 30 oral squamous cell carcinomas (OSCC), and 10 normal oral epithelium controls. Digital analysis using the auto fluorescence of eosinophils accentuated by Alexa Fluor 488 stain, in FFPE tissue sections; we used Cytation 5 machine and Gen 5 software, to digitally quantify the extent of eosinophils infiltrate in OSCC. Results: Out of the inflamed OSCC examined sections with heavy inflammatory infiltrate rich in eosinophils, RBCs, neutrophils and monocytes, eosinophils were readily detected, and digitally quantified after staining with Alexa Fluor 488. The tumor cores showed eosinophils infiltrate in the peri-tumoral stroma of 26 (87%) of the 30 examined OSCC Conclusion: This study highlights the importance of assessment of the type and extent of inflammatory cells infiltrate as well as its digital quantification. It provides a novel quantification method of eosinophils that opens avenues to study the correlation between eosinophils infiltrate and tumor prognosis.
digital
quantification
Eosinophils
Oral squamous cell carcinoma
autofluorescence
2020
08
01
74
78
https://adjalexu.journals.ekb.eg/article_88441_474f1ffa04a41ca359fbbeb38b21624e.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
EFFECT OF GARDEN CRESS ON ALVEOLAR BONE HEALING IN RATS WITH LIGATURE INDUCED PERIODONTITIS (Histological& Ultrastructural study)
Eman
Salem
Sahar
Karam
Khadiga
Kawana
Nesma
Khalil
Mona
Lotfy
Introduction: Lepidium sativum, commonly known as garden cress is a herb that is native to Egypt and West Asia. Its seeds are rich source of proteins, dietary fiber, omega-3 fatty acids, iron, other essential nutrients and phytochemicals. Garden cress is widely used in folk medicine for the treatment of many diseases. Periodontitis is defined as an inflammatory bacterial-induced disease that damages the soft tissue and gradually destroys the periodontal ligaments and supporting alveolar bone. Periodontitis can cause teeth to loosen or lead to tooth loss. Different methods, such asbiomechanical measurements, surgical approaches are used to treat periodontitis. Objective: to evaluate histologically and ultra-structurally the possible effect of garden cress therapy on alveolar bone healing in rats with ligature induced periodontitis. Materials and Methods: Fortyfive adult male Sprague–Dawley rats of 6 months old (200-250 grams in weight) was used in this study. They were divided into 3 equal groups: group A; (control group), group B; (ligature induced periodontitis) and group C :( ligature induced periodontitis with garden cress administration). Ligature was removed after 11 days. Garden cress was applied after ligature removal systemically by using oral gavage. Rats were sacrificed after six weeks from the ligature removal. Mandibles were dissected out and were prepared for histological and scanning electron microscopic evaluation. Results: After 6 weeks the specimens of group B (periodontitis group) showed alveolar bone loss, while in group C (garden cress group) showed relative restoration of alveolar bone. Results of scanning electron microscope revealed an irregular & porous bone surface of group B, while Group C showed relative smooth and regular alveolar bone. Conclusion: Garden Cress systemic administration accelerates alveolar bone healing and enhances bone formation in periodontal diseases.
Garden cress
Periodontitis
alveolar bone
Rats
2020
08
01
79
83
https://adjalexu.journals.ekb.eg/article_88442_ac79eb82342f3001e1cde19881e3daf6.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
MICRO SHEAR BOND STRENGTH OF UNIVERSAL DENTAL ADHESIVES TO DENTIN USING DIFFERENT ETCHING MODES (IN VITRO STUDY)
Samaa
Morsy
El Sayed
Moustafa
Mahmoud
Elsharkawy
Introduction:Patient demand for tooth colored restorations have made composites an important part of the restorative process. An important factor affecting the intraoral performance of composite restorations is bonding. Therefore, a strong bond at the tooth-restoration interface is necessary for long-term success of a composite restoration. Objectives: To compare the micro shear bond strength of a resin composite (Filtek Z250) to dentin using three universal adhesives in self-etching and total-etching modes and perform fractographic analysis using scanning electron microscope. Materials and methods:60 dentin specimens were used in this study. They were divided into two main groups (self-etch mode & total-etch mode). Each group was subdivided into three subgroups according to the bonding agent used (Tetric N bond universal, All bond universal and Single bond universal). Bonding of adhesives and composite buildups were done according to manufacturer’s instructions. All specimens were thermocycled for 500 cycles from 5 to 55°C. The micro shear bond strength was measured using universal testing machine. Specimens were further sectioned, gold sputtered and evaluated fractographically using scanning electron microscope (SEM). Data obtained were analyzed using F-test (ANOVA), two-way ANOVA and Spearman’s correlation tests. Results: In self-etch mode, the micro shear bond strength of the three tested adhesives didn’t show a significant difference. Meanwhile, etching significantly improved the micro shear bond strength of Single bond universal, while Tetric N bond universal and All bond universal showed no significant difference. Conclusions: An etching step prior to the application of the universal adhesives didn’t significantly affect their micro shear bond strength, except for Single bond universal.
Adhesives
Dentin
Bonding agents
etch mode
micro shear bond strength
fractographic analysis
2020
08
01
84
90
https://adjalexu.journals.ekb.eg/article_88443_d002f3b35926d6d7a24f3eec85a610cb.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
COMPARATIVE STUDY BETWEEN THE USE OF AMNIOTIC MEMBRANE AND FIBRIN GLUE FOR THE REPAIR OF PERFORATED MAXILLARY SINUS (AN EXPERIMENTAL STUDY)
Maather
Selim
Ahmed
Shaaban
Hala
Ragab
Nesma
Khalil
Introduction: Maxillary sinus membrane perforation is the most common intraoperative complications associated with the sinus lifting procedure. There are various sutureless techniques used in repairing of perforated sinus membrane including; collagen membrane, fibrin sealants, cyanoacrylate adhesives,amniotic membrane and fibringlue. Objectives: The aim of this study was to compare between the use of amniotic membrane and fibrin glue in healing of perforated maxillary sinus in rabbits. MATERIALS AND METHOD: This study was conducted on ten adult healthy male rabbits, with an average weight between 2-3 kgs. A split mouth design was implemented. In each rabbit, the right sinus membrane window was repaired by fibrin glue (group I), while the left sinus membrane window was repaired by amniotic membrane (group II). Results: Histological results revealed that amniotic membrane enhanced faster reepithelialization of maxillary sinus membrane and bone healing where the amount of the newly formed bone observed in group II was greater than that of group I. Histomorphometric analysis showed the increase in the bone surface area mean percentage in group II in comparison to group I. Conclusion: According to the results of the present study, it was concluded that the amniotic membrane is effective in the repair of perforated sinus membrane with superior potentiality than fibrin glue especially in the early stage.
Maxillary sinus repair
Amniotic membrane
Fibrin glue
Sutureless technique
2020
08
01
91
98
https://adjalexu.journals.ekb.eg/article_88444_c2560086f0e922ed1182c33a9d497eaf.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
EVALUATION OF ANTIMICROBIAL EFFECT OF TWO PROPOLIS FORMULAE ON STREPTOCOCCUS MUTANS AND CANDIDA ALBICANS: A RANDOMIZED CLINICAL TRIAL
Hend
El-Allaky
Nadia
Wahba
Dalia
Talaat
Azza
Zakaria
INTRODUCTION: Streptococcus mutans is considered to be the most cariogenic microorganism. However, candida albicans has also been isolated from dental plaque of high caries risk children. Therefore, uses of natural antimicrobial agents such as propolis have been established as an adjunctive approach for oral health care. OBJECTIVES: the aim of this study was to evaluate the antibacterial and antifungal effects of propolis chewing gum compared to propolis mouthwash. MATERIALS AND METHODS: Sixty high caries risk children aged 6 to 8 were randomly assigned into two groups. Group I received propolis chewing gum and Group II received propolis mouthwash. A baseline and final plaque samples were obtained from each participant before and after intervention respectively within 14 days interval. All participants were asked to refrain from eating or brushing on the sampling days. Samples were sent immediately to the laboratory for microbial assessment. RESULTS: data revealed that both study groups showed significant differences (P≤0.001) in streptococcus mutans and candida albicans counts before and after intervention. But there was no significant difference among the comparative groups. CONCLUSION: It was demonstrated that propolis chewing gum and propolis mouthwash can be used as antimicrobial agents.
Propolis
chewing gum
mouthwash
Antimicrobial
2020
08
01
99
103
https://adjalexu.journals.ekb.eg/article_88445_c430d7461d00306174ddd2e12d2392ed.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
SHEAR BOND STRENGTH FOR IMMEDIATE AND DELAYED REPAIR OF COMPOSITE WITH MICROHYBRID AND NANOHYBRID RESINS USING DIFFERENT BONDING AGENTS
Eman
Kholief
El Sayed
Mahmoud
Sonia
El Chabrawy
Introduction: Repair is indicated mainly in the event of localized shortcomings that are clinically unsatisfactory and no longer acceptable; it implies in any case the addition of a restorative material. Objectives:Shear bond strength for immediate and delayed repair of composite with microhybrid and nanohybrid resins using different bonding agents. Materials and methods: One hundred sixty nanohybrid composite discs were prepared. They were divided into 16 groups (10 each) according to 3 factors: Factor 1: Repair time, Factor 2: Repair protocol and Factor 3: Repair composite material. For immediate repair (I), discs (n=80) were divided into 4 subgroups 20 discs each. Each subgroup was divided into 2 groups as follows Group 1 (a): no conditioning with nanohybrid composite, Group 1 (b): no conditioning with microhybrid composite, Group 2 (a) Adhese Universal bond with nanohybrid composite, Group 2 (b) Adhese Universal bond with microhybrid composite, Group 3 (a) All-Bond Universal with Nano-hybrid composite ,Group 3 (b) All-Bond Universal with microhybrid composite, Group 4 (a) Scotchbond™ Universal with nanohybrid composite, and Group 4 (b) Scotchbond™ Universal with microhybrid composite. After 3 months of storage for delayed repair (II), the repair procedures were performed similar to the immediately repaired groups. After 1000 thermal cycles, all specimens were subjected to shear bond strength test. Results:repair time and surface treatment revealed statistically significant effect on the shear bond strength values of all groups (p ≤ 0.05). Highest shear bond strength value was recorded in group I4b (21.97 ± 1.19) MPa and the lowest value was recorded in group II1a (4.42 ± 0.88 MPa) Conclusions: Time of repair, bonding agent and repair material affected repair bond strength of composite.
Immediate and delayed repair
adhesion
Bonding Agent
repair bond strength
2020
08
01
104
110
https://adjalexu.journals.ekb.eg/article_88446_61cdd19906f1496307eae8293d8cda6b.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
INFLUENCE OF LUTING RESIN CEMENT POLYMERIZATION MODE AND VENEER THICKNESS ON THE COLOR STABILITY OF FELDSPATHIC CAD/CAM VENEERS
Zeinab
Morsy
Mona
Ghoneim
Rania
Afifi
Introduction: The color stability of the resin-based cement employed for the cementation procedure may be as important for the long-term clinical success of the restoration as the mechanical properties of the veneer. Objectives: The aim of this study was to evaluate the effect of different polymerization modes of resin cements and ceramic thicknesses on the color stability of feldspathic CAD/CAM veneers. Materials and Methods: Sixty-four sound human maxillary central incisor teeth were divided according to ceramic veneer thickness used into two main groups (n = 32); Group I; 0. 5 mm ceramic thickness and Group II; 1 mm ceramic thickness, each group was then subdivided according to the type of resin cement received (Light cure LC or Dual cure DC) into four sub groups of 16 specimens each: Group I A:(0.5 + LC); Group I B:(0.5 + DC); Group II A:(1 + LC); Group II B (1 +DC) . Sixty four Ceramic discs were prepared; for group I, 32 discs of diameter 7 mm and height 0.5mm while for group II, 32 discs of diameter 7mm and height 1mm. The shade was measured using digital spectrophotometer at 3 different time intervals. Results: Ceramic thickness alone revealed statistically significant effect on the ∆E values of all groups (p ≤ 0.05), irrespective of the type of the resin cement. The highest mean ∆E values were recorded in group I A and the lowest ∆E values were recorded in group II B .There was statistically significant difference in ∆E 2 between groups IA and IB. Conclusions: All studied cements showed ∆E within clinically acceptable range in both dual cure and light cure resin cements. Increasing ceramic thickness can serve to mask the underlying color change.
Porcelain laminate veneers
ceramic thickness
resin cement
Vita Easyshade
2020
08
01
111
116
https://adjalexu.journals.ekb.eg/article_88447_1016caefb5e33fe3468f6a6a2f8bd608.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
SCANNINING ELECTRON MICROSCOPIC EVALUATION OF THE EFFECT OF BORON AND FISH OIL ON HEALING OF EXTRACTION SOCKETS IN RATS
Omnia
Abd El Fatah
Salwa
Abd El Samad
Azza
Koura
Dina
Nagy
Introduction: Great incidence of complications have been reported tooth extraction. Many materials and drugs were used previously to cover extraction socket in an attempt to enhance healing or prevent post-operative complications. Several studies suggested that Boron and fish oil affect many of the biological processes during bone healing by influencing cell membrane function. Thus, they affect cellular responses to cytokines and hormones, including those involved in bone growth and turnover in rats. Objective: of the study: To evaluate the effect of boron and fish oil on alveolar bone healing after tooth extraction in rats using Scanning Electron Microscope, Energy Dispersive x-ray analysis [EDXA] and serum alkaline phosphatase analysis. Materials and Methods: forty-five adult male albino rats (120-150 gm in weight) were used in this study. Extraction of the lower 1st molar was performed in all animals then they were randomly divided into 3 equal groups; Group I (control ) including 15 rats fed on normal diet, Group II (boron) including 15 rats receiving normal diet and boron supplementation (3 mg/kg boron diluted in 3.5 ± 4 ml distilled water) daily, Group III (fish oil) including 15 rats receiving normal diet and fish oil supplementation (65 mg/kg fish oil) daily. The animals were sacrificed after 2 weeks and the effect of boron and fish oil was evaluated using Scanning Electron Microscope, Energy Dispersive x-ray analysis and Serum alkaline phosphatase level analysis. The data obtained was tabulated and subjected to statistical analysis. Results: After 2 weeks of extraction, scanning Electron Microscopic results revealed an increase in trabecular bone thickness with regular bone surface, and uniform osteocyte lacunae in Group II (boron) in comparison to group I (control ) and Group III (fish oil) and these results were proved by EDXA which showed increase in Ca level in group II than group I and group III. On the other hand, serum alkaline phosphatase analysis showed that group III (fish oil) has the higher level of ALP after 2 weeks of the experiment. Conclusion: Boron and fish oil systemic administration have a positive effect on socket healing and bone structure and composition in rats.
extraction socket
alveolar bone
bone healing
Boron
fish oil
2020
08
01
117
124
https://adjalexu.journals.ekb.eg/article_88448_409dfbd11713091840b1488cb1f16272.pdf
Alexandria Dental Journal
1110-015X
1110-015X
2020
45
2
USE OF CUSTOM MADE PEEK PLATES FOR TREATMENT OF MANDIBULAR FRACTURE
Noha
Dessoky
Ahmed
El-Mahallawy
Magued
Fahmy
Mervat
Khalil
Introduction: Maxillofacial injuries, such as soft-tissue injuries, dental injuries, or maxillary, mandibular, and zygomatic fractures; are the most common injuries treated by oral and maxillofacial surgeons. In the last few years polyetheretherketone (PEEK) material was recognized as a material for maxillo-facial and cranial reconstructions. Objectives: The aim of this study is to evaluate the use of custom made polyetheretherketone (PEEK) plate in the treatment of mandibular fracture. Materials and methods: 10 patients having non-comminuted recent mandibular fracture will be treated using custom made PEEK plates. Clinical follow up will be conducted after 24-hours, one week, 1 month, 3 months and 6 months. Also, a radiographic investigation will be performed after 6 months to estimate the mean bone density across the fracture line. Results: Data will be collected, summarized and statistically analyzed using the suitable methods. CONCLUSIONS: Fixation of mandibular fracture with custom made PEEK plate provides satisfying clinical and radiographic results after 6 months follow up.
Mandibular fracture
PEEK
2020
08
01
125
128
https://adjalexu.journals.ekb.eg/article_88449_cc104acbfbcd5ce4e0c9761b808ee73c.pdf