issues

Contents

CLINICAL AND RADIOGRAPHIC EVALUATION OF THE USE OF INTRAORAL IMPLANTS IN CONSTRUCTON OF SINGLE STAGE IMPLANT RETAINED AURICULAR PROSTHESES

Ingy S. Soliman, Mohamed S. El-Attar, Mohamed M. Fata, Juan R. Garcia, Osama Abdel Aziz, Ahmed Y. Kosba, Maha El-Demellawy.

> Show Abstract

ABSTRACT  Introduction: Although plastic surgery is capable of restoring missing tissues, it may not be the ideal choice of treatment because of the complex shape and structure. For restoration of complex organs such as ears, prosthetic restorations may be an alternative to surgi­cal restorations due to their aesthetical success. Prosthetic rehabilitation to restore the facial disfigurements with custom made prosthetic devices may improve the level of function and patient’s self-esteem. Difficulties with facial prostheses may arise due to patient factors such as amount of soft tissue loss, location of the auricular defect, dynamic tissue beds, retentive quality of the area, and associated irritation of the tissue beds. Hence, the rehabilitation choice depends on meticulous restoration of physical dimensions, external contour, and surface landmarks to ensure satisfactory aesthetic outcomes for prosthodontists and their patients. Objectives: To use inrta-oral implant as an alternate of maxillofacial ones to retain auricular prostheses and evaluate autografted single stage implant placement surgery. Materials and methods: Ten patients complaining of congenitally missing ear either microtia or anotia or acquired missing ones were recruited from maxillofacial and prosthodontic departments’ outpatient clinics, Faculty of dentistry, Alexandria University. Patients were diagnosed clinically and radio-graphically using Cone Beam Computed tomography imaging (CBCT). The prosthetic ear was retained using three ball and socket attachments .They were evaluated upon radiographic and clinical level of osseointegration as well as patient acceptance and hygiene. Results: None of the implants showed failure to osseointegration; providing a survival rate of 100% on both clinical and radiographic levels of evaluation. Conclusions: The use of 6 mm dental implants in the mastoid region succeeded to replace the maxillofacial implants. Single stage implant placement surgery minimized tissue traumatization and possessed higher patient satisfaction level. Keywords: Intraoral implants, single stage surgery, auricular prosthesis, Autografted implants.


> PDF

UTILITY OF CONE BEAM COMPUTED TOMOGRAPHY OF THE MANDIBLE IN DETECTION OF OSTEOPOROSIS IN POSTMENOPAUSAL WOMEN

Noha M. Elkersh, Maha R.Talaab, Walid M. Ahmed, Yousria S. Gaweesh

> Show Abstract

ABSTRACT   Introduction: Osteoporosis is a systemic disease characterized by decreased bone mass and increased bone fragility. Dental radiographs are widely used in the adult population especially Cone Beam Computed Tomography (CBCT) that is used in oral and maxillofacial surgery for numerous clinical applications. Therefore, dental radiographs may offer an opportunity as a screening tool for the early detection of osteoporosis and subsequent referral. Objectives: The aim of this study was to evaluate the diagnostic efficacy of mandibular CBCT images for the detection of osteoporosis in postmenopausal women and to correlate it to Dual energy x-ray absorptiometry (DEXA) scan results. Materials and methods: twenty four postmenopausal female patients were recruited in this study. Based on their DEXA results, they were classified into osteoporotic and control non-osteoporotic groups. CBCT examination was done as part of surgical treatment. Coronal images were used to measure the computed tomography mandibular index (CTMI) and the computed tomography index (superior) (CTIS).The correlation between these indices and bone mineral density (BMD) measured by DEXA were assessed. Results: There were significant differences between the control and osteoporotic groups in the computed tomography mandibular index superior CTI(S), and computed tomography mental index (CTMI: inferior cortical width).There was significant positive correlation between CTMI and T-score measured by DEXA. ConclusionS: CTI(S) and CTMI on the CBCT images can be used to assess the osteoporotic women. Keywords: Cone-Beam Computed Tomography; Bone Density; Osteoporosis


> PDF

CLINICAL EVALUATION OF REMOVABLE PARTIAL DENTURE CONSTRUCTED FROM 3D PRINTED RESIN PATTERN DESIGNED USING CAD CAM TECHNOLOGY

Ahmed S Saad, Faten S Abbas, Safyah H Elgharabawy

> Show Abstract

ABSTRACT INTRODUCTION: Computer-assisted design, computer-assisted manufacture (CAD/CAM) can be successfully applied to the fabrication of removable partial denture (RPD) alloy frameworks and replace laboratory crafting techniques. The CAD/CAM techniques have been widely used for a long time to manufacture dental prostheses. Computer-aided technologies allow more precise and systematic modeling, and could therefore reduce the burdensome steps of both chair-side and laboratory work, saving vital time. OBJECTIVES: This study was aimed to compare between the accuracy of chrome-cobalt removable partial denture frameworks designed and fabricated using CAD/CAM technique with that fabricated using conventional technique MATERIALS AND METHODS: Seven maxillary bilateral partially edentulous patients having Class III modification 1 Kennedy classification were selected from those attended to the prosthodontic department, Faculty of Dentistry, Alexandria University. For each patient, two different cobalt chromium removable partial frameworks were constructed; the first one was fabricated using CAD CAM technique (group A)and the other framework was fabricated using conventional manufacturing technique(group B) and were compared through evaluation of: (1) Guiding plane/plate relation. (2) Accuracy of fit of occlusal rests and major connector. RESULTS: all removable partial dentures fabricated by CAD/CAM technology showed increased improvement of accurate adaptation of the palatal strap major connector, guiding plane\\plate relation and fit of occlusal rest, also it was less time consuming and economic need compared to conventional technique. CONCLUSIONS: The use of CAD/CAM technology for fabrication of removable partial denture frameworks should be widely applied because of its favorable clinical accuracy. KEYWORDS: Removable partial denture, CAD/CAM, Guiding planes, Chrome-Cobalt powder, Occlusal rests adaptation.


> PDF

EXPRESSION OF ARGYROPHILIC NUCLEOLAR ORGANIZING REGION COUNTS AND PROLIFERATING CELL NUCLEAR ANTIGEN IN EPITHELIAL ODONTOGENIC TUMORS

Amr A. Mohamed, Zeinab E. Darwish, Sahar M. Elsheikh, Ibrahim M. Zeitoun.

> Show Abstract


> PDF

EVALUATION OF TOPICAL OZONE THERAPY ON SOCKET HEALING IN RABBITS WITH INDUCED DIABETES MELLITUS

Aya A. Shehata, Gehan M. Elba, Khadiga Y. Kawana

> Show Abstract

ABSTRACT INTRODUCTION: Ozone (O3) gas is a molecule consisting of three atoms of oxygen in a dynamically unstable structure due to the presence of mesomeric states. Ozone therapy has been utilized and heavily studied for more than a century. Its effects on bone are proven and consistent. It enhance osteoblastic activity and new bone formation. Diabetes mellitus (DM) is a chronic metabolic disease that potentially affect bone metabolism, structure, and mineral density. OBJECTIVES: to evaluate histologically the possible effect of ozone therapy on bone healing after tooth extraction in rabbits with alloxan induced diabetes mellitus. MATERIALS AND METHODS Thirty adult male New Zealand rabbits weighing 1500-2500 grams (approximately six months of age) will be divided into 3 equal groups: group I;(control group), group II; (diabetic group): diabetes was induced by a single intravenous injection of alloxan in a dose of 100 mg/kg and group III:(Ozone group) rabbits was treated as in diabetic group then they was treated with ozone therapy which will be applied topically in the form of gel inside the tooth socket. Rabbits were sacrificed after six weeks. Each sample were dissected and prepared for histological evaluation. RESULTS: in diabetic group the socket showed empty central region surrounded by disorganization bony trabeculae. The bony trabeculae surrounded less vascular spaces and more fibrous tissue.in diabetic group treated with ozone therapy the socket showed complete filling of the socket with newly formed bone.The socket with newly formed bone surrounding highly vascular bone marrow. CONCLUSIONS: Ozone gel application accelerates socket healing and enhances bone formation in diabetes mellitus KEYWORDS: ozone, alloxan, diabetes mellitus, tooth socket, rabbits


> PDF

EFFECT OF RALOXIFENE IN THE PREVENTION OF OSTEOPOROSIS OF ALVEOLAR BONE INDUCED BY HIGH FAT DIET IN RATS.

Maha M. Montaser, Samia.Soliman, Nesma M.Khalil, Mounir.Eladawy

> Show Abstract

ABSTRACT Introduction: Obesity is positively associated with many chronic disorders such as osteoporosis, as it decreases the osteoblastic cell formation, increases the osteoclastic activity and decreases the vascularity of the bone marrow as well. Raloxifene  belongs to a class of drugs called selective estrogen receptor modulators (SERMs). It reduces the expression of bone turnover markers and increases bone mineral density. Objectives: To investigate the effect of Raloxifene in the prevention of osteoporosis of alveolar bone induced by high fat diet in the rats.\\ Materials and methods Thirty female albino rats were divided randomly into 3 equal groups, (10 rats each) as follows: Group I: control group, Group II: High fat diet group (59.28% of fats in their chow), Group III: High fat diet group (59.28%) with intake of Raloxifene 1mg/ kg once daily for 12 weeks. After 12 weeks all rats were sacrificed, molar segments of the mandibles were dissected and prepared for histological and histomorphometric analysis. Results: In high fat diet group, there was a significant deterioration in alveolar bone architecture and decrease in its surface area. Bone surface became irregular with multiple osteoclasts. It consisted of thin trabeculae enclosing wide fatty infiltrated bone marrow.   In the high fat diet group treated with Raloxifene the alveolar bone surface and architecture relatively returned back to the normal.  The histomorphometric results, revealed a significant decrease in the total bone surface area in high fat diet group and a significant restoration of the bone surface area in high fat diet group treated with Raloxifene in relation to control group. Conclusions: High fat diet can induce alveolar bone osteoporosis and Raloxifene is an effective drug in restoring alveolar bone density and architecture. Keywords: Osteoporosis, obesity, high fat diet, alveolar bone, Raloxifene.


> PDF

SYNTHESIS AND CHARACTERIZATION OF METALLIC AND POLYMERIC NANOPARTICLES AND THEIR EFFECT ON THE ANTIBACTERIAL PROPERTIES OF MICROHYBRID COMPOSITE RESIN

Mona M. Abdelrehim, Mona H. Mohy El Din., Sonia M. El-Shabrawy, Amal E. Fahmy, Sarah M. Abdelhamid, Heba S. Ramadan

> Show Abstract

ABSTRACT Introduction: During the past decade, composites have become the most commonly used restorative materials. The rate of dental caries following treatment with composite resin is high. Therefore, one of the most applicable methods for preventing enamel demineralization around the restorations is using dental materials resistant to the bacterial accumulation Objectives: To synthesis and characterize antibacterial nanoparticles and to evaluate the effect of blending microhybrid composite with zinc oxide nanoparticles (ZnO), Chitosan (Cs) and combination of both Chitosan/Zinc oxide nanoparticles (Cs/ZnO) and properties of these nanoparticles on the composite resin. Materials and methods: Three antibacterial nanoparticles were prepared and characterized in terms of particle size, zeta potential, shape, morphology and functional group determination. Minimum inhibitory concentration of the nanoparticles was determined. The nanoparticles were incorporated into commercial microhybrid composite resin. The antibacterial properties against Streptococcus mutans were evaluated by disc diffusion test and direct contact test. The results were analyzed using ANOVA test at p £ .05 significance level. RESULTS: For agar diffusion disc, incorporation of ZnO nanoparticles into the composite resin results in an antibacterial effect which lasted for up to 12 weeks, while for the Cs and Cs/ZnO nanoparticles the antibacterial effect lasted for up to 2 weeks. The direct contact test visualized under SEM also showed that incorporation of ZnO nanoparticles into composite resin to be the most inhibitory in all the 4 groups, denoting that ZnO-NPs has a far better inhibitory effect than Cs-NPs and Cs/ ZnO-NPs. Conclusions Antibacterial nanoparticles could be synthesized and characterized by Zetasizer NanoZS, scanning electron, transmission microscopy and Fourier transform infrared spectroscopy. Incorporation of ZnO, Cs and Cs/ZnO nanoparticles into the composite resin could significantly inhibit the S. mutans. The antimicrobial efficacy of the ZnO nanoparticles blended with microhybrid composite resin was confirmed for a duration up to 12 weeks. Keywords: Composite resin, ZnO, Chitosan nanoparticles.


> PDF

BLOOD VESSEL DENSITY AS A PREDICTOR IN ORAL SQUAMOUS CELL CARCINOMA USING CD34

Alaa A. Elmorsy, Taissir A. Omar, Hamed A. Fouad, Mohamed M. Fata

> Show Abstract

ABSTRACT   Introduction: Oral squamous cell carcinoma (OSCC) accounts for more than 90% of all oral cancers. Despite advances in the approach to locally advanced disease, about 50% of the tumors will recur. Fifty percent of patients present nodal involvement that is detectable during diagnosis. Of this group, less than 40% survive after five years, compared with a 90% survival rate for patients without metastasis. If the lesion is detected at an early stage and treated effectively, the survival rate could exceed 50%. Many retrospective studies have shown that microvessel density (MVD) could represent a valid independent prognostic factor for the overall survival. The blood vessel den­sity may constitute a relevant parameter for determining the prognosis and guiding bio­logical treatments for aggressive OSCC Objectives: To assess the MVD using CD34 in lymph node positive and negative cases and to correlate the results with the lymph node status. Materials and methods: MVD was calculated in 22 surgical specimens taken from OSCC patients. Biopsies were taken from the primary tumor of eleven cases proved to have positive lymph node and eleven cases with negative lymph nodes. Immunohistochemical (IHC) staining was performed using a Labeled Strept-Avidin Biotin complex method (LSAB), using the CD34 antibody. Results: OSCC biopsies showed immunoreactivity to CD34, the difference between the mean MVD and lymph node status was significantly correlated. No significant relation with the histological grade site was found. Conclusions: MVD was significantly correlated with lymph node status and it could be used as an indicator for progression and early metastasis of OSCC. But, no correlation was found between the MVD and the histological grading. Keywords: OSCC, CD34, MVD, angiogenesis, lymph node.


> PDF

ANTIFUNGAL EFFECT OF PHOTOCATALYTIC NANO -TITANIUM DIOXIDE INCORPORATED IN SILICONE ELASTOMER: (A MICROBIOLOGICAL STUDY)

Sarah Y. El Shafie1, Ahmed M. El Shimy, Amel G. El Sheredy, Maisa EL. Mousafa.

> Show Abstract

ABSTRACT   Introduction: Titanium dioxide nanoparticles may improve the antifungal properties of silicone elastomer prosthetic materials. Objectives: To evaluate the photocatalytic antifungal activity of silicone elastomer incorporated with titanium dioxide nanoparticles against Candida albicans. Materials and methods Titanium dioxide nano-particles (Aeroxide® TiO2 P25, Sigma Aldrich, USA) were characterized using x-ray diffraction analysis (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), uv-vis spectrophotometeric analysis, methylene blue degradation efficiency test and direct contact test. Sixty six disc shaped specimens (6 mm diameter x 1mm thickness) of silicone elastomer (SE) (MED-4210, Factor II, USA) were included and divided into 6 groups based on the concentration of nano-TiO2 in silicone elastomer (0%, 2%, 4%, 6%, 8%, 10%) (W/W). Impregnated culture test was used to evaluate the antifungal activity of all SE samples against candida albicans as colonies forming units (CFUs) of treated aqueous suspension of candida albicans were measured at 0, 30, 60, 90 and 120 min follow‑up under UVA light. The dispersion of TiO2 within SE matrix was analysed by Laser scanning microscopy (LSM). Results: Data were analysed using ANOVA test and Tuckey\'s Post Hoc test. Nano-TiO2 characterization tests confirmed the crystalline structure (85% anatase and 15% rutile),  shape (irregular faceted), size (22nm), absorption spectrum (320-400nm) and the photocatalytic antifungal ability of the as-purchased Aeroxide TiO2 P25. Planktonic cultures of candida albicans exposed to SE/TiO2 samples reduced candida albicans count by 4% - 99.99%, depending on the nanoparticles concentration and follow-up time. The candida albicans counts did not decrease in group I without TiO2. LSM of SE specimens showed finer dispersion of TiO2 within SE matrix in group II, III and IV than that in group V and VI. Conclusions: Incorporation of TiO2 P25 within SE (MED-4210) shows promising inhibitory activity against candida albicans. Keywords: Antifungal activity, Candida albicans, photocatalytic nano-titanium dioxide, silicone elastomer.


> PDF

MECHANICAL EVALUATION OF POLYETHERETHERKETONE COMPARED WITH ZIRCONIA AS A DENTAL IMPLANT MATERIAL

Youssef M. Kassem, Ahmad M. Alshimy, Sonia M. El-Shabrawy.

> Show Abstract

ABSTRACT   Introduction: Dental implants are currently one of the main pillars of restorative dentistry. Titanium and its alloys were and still are the gold standard for dental implant materials. However, Titanium is not a perfect material and has many drawbacks thus the search for a more ideal material is ongoing. Zirconia and Polyetheretherketone are two viable alternatives to titanium as dental implant materials. They show different mechanical behavior invitro and invivo, so they are investigated and compared to each other. Objectives: Evaluate and compare the different material properties of Polyetheretherketone and yttrium-stabilized tetragonal polycrystalline zirconia when used as dental implant material. Materials and methods: Microbars of zirconia and Polyetheretherketone were prepared using precision cutter and low speed micro motor under water cooling and used to assess the following properties for the two materials: 1) Vickers Microhardness 2) Flexural strength before and after cyclic loading Results: There was a highly significant difference between hardness of zirconia and Polyetheretherketone. There was also a highly significant difference between flexural strength of zirconia and Polyetheretherketone (both before and after cyclic loading). There was significant decrease in flexural strength of zirconia after cyclic loading. No significant difference was found for Polyetheretherketone after cyclic loading. Conclusions: Polyetheretherketone is a promising alternative to titanium and zirconium as a dental implant material. Keywords: Dental implant, Flexural strength, Hardness, PEEK, Zirconia.


> PDF

REMINERALIZATION EFFECT OF HEXAMET APHOSPHATE COMBINED WITH LOW FLUORIDE TOOTHPASTE ON ENAMEL SURFACE OF PRIMARY TEETH (IN VITRO STUDY)

Alyaa E. Nasr, Nadia A. Wahba, Neveen S. Bakry.

> Show Abstract

ABSTRACT   Introduction: Investigators have been searching for alternative remineralizing compounds that have superior properties to those conventionally used; in order to reduce the risk of fluorosis in children. Objectives: To evaluate the anti-caries effect of hexametaphosphate (HMP) combined with low-fluoride toothpaste on primary teeth enamel surface using fluoride uptake analysis. Materials and methods: Seventy five freshly extracted anterior primary teeth were sectioned into two halves in a labiolingual direction (150 specimens). One half of each tooth remained untreated and served as control and the other corresponding half that was treated with the remineralizing toothpaste served as test. Specimens were assigned into subgroup IA (untreated) n=25, subgroup IB (250ppm F + 0.5% HMP) n=25, subgroup IIA (untreated) n=25, subgroup IIB (500 ppm F) n=25 and subgroup IIIA (untreated) n=25, subgroup IIIB (1000 ppm F) n=25. Specimens were subjected to pH cycling for five days and immersed in remineralizing solution for an additional two days. The enamel fluoride uptake analysis of specimens was evaluated quantitatively using an ion specific electrode. Data were analyzed using Mann-Whitney U, Kruskal-Wallis and Post-hoc pair-wise test. Results: There was a significant high median enamel fluoride uptake between test subgroups IB (250ppm F + 0.5% HMP), IIIB (1000 ppm F) and their controls where p=0.008 and p=0.008 respectively, while there was no significant difference in median enamel fluoride uptake between the test subgroup IIB (500 ppm F) and its control subgroup IIA where p=0.690. Pair-wise comparison of enamel fluoride uptake in the three test subgroups IB, IIB and IIIB showed significant high median value of subgroup IB than subgroup IIIB where p=0.027. Conclusions: A toothpaste containing 250ppm F + 0.5% HMP has a high anti-caries potential in comparison to pediatric 500 ppm F and standard 1000 ppm F toothpastes on primary teeth. Keywords: Demineralization, fluoride, hexametaphosphate, enamel, pH cycling, toothpastes.


> PDF

RETAINED EXCESS RESIN CEMENT AROUND TISSUE LEVEL IMPLANTS USING TWO DIFFERENT CEMENTATION TECHNIQUES (AN IN VITRO STUDY)

Diana M. Abdelazeem, Samir A. Koheil, Wegdan M. Abdel-Fattah

> Show Abstract


> PDF

CLINICAL EVALUATION OF POLYOXYMETHYLENE PARTIAL DENTURES DESIGNED AND FABRICATED BY USING CAD/CAM TECHNOLOGY

Haitham A. Ismail, Faten S. Abbas, Nazik A. El Gindy

> Show Abstract

ABSTRACT   Introduction: Recent researches had shown that, in principle, computer-assisted design, computer-assisted manufacture and rapid prototype technologies (CAD/CAM) can be successfully applied to the fabrication of removable partial denture (RPD) alloy frameworks and replace laboratory crafting techniques. The (CAD/CAM) techniques have been widely used for a long time to manufacture dental prostheses. Polyoxymethylene (POM) also known as acetal resin has been used as an alternative tooth- colored denture base and denture clasps material since 1986 and was promoted primarily for superior esthetic. Objectives: To evaluate clinically the use of Polyoxymethylene partial dentures designed and fabricated by using CAD/CAM technology compared to conventional cobalt chromium partial denture through both the masticatory efficiency and patient satisfaction. Materials and methods: This clinical trial was conducted on twenty mandibular partially edentulous patients (Kennedy class I) who received two types of RPD. Type I was Polyoxymethylene partial denture designed and fabricated by using CAD/CAM Technology and Type II was cobalt chromium partial denture fabricated using the conventional technique .At time of denture insertion, the masticatory efficiency of both types of dentures was evaluated  for each patient .After 3 months of denture use, each patient was clinically evaluated through both the masticatory efficiency and patient satisfaction. Results: Type I RPD showed better masticatory efficiency than Type II RPD but without statistical significant values at different follow up periods. Patients showed more satisfaction with type I RPD than with type II RPD with a significant value. Conclusions: Polyoxymethylene partial denture designed and fabricated by using CAD/CAM Technology is a favorable treatment for partially edentulous patients showing improvement of masticatory efficiency and favorable patient satisfaction. Keywords: CAD CAM, Polyoxymethylene, cobalt chromium, Partial Denture.


> PDF

EFFECT OF LASER AND CHEMICAL SURFACE TREATMENT OF COBALT-CHROMIUM ALLOY ON ITS BOND STRENGTH WITH HEAT CURED ACRYLIC RESIN (COMPARATIVE LABORATORY STUDY)

Kamel M. Aboelsayed, Ossama A. Mahfouz, Omaima Aboulwafa, Mohamed A. Hafez

> Show Abstract


> PDF

TEMPOROMANDIBULAR JOINT CAPSULAR AND PERICAPSULAR INJECTION OF SCLEROSING AGENT AND ITS EFFECT ON THE MOUTH OPENING (AN EXPERIMENTAL STUDY)

Linda A. ElRahmany, Sherief H. Elghamrawy, Nevein S. Mohamed, Hanaa S. Raslan

> Show Abstract

ABSTRACT   Introduction: Recurrent Temporomandibular Joint (TMJ) dislocation is a relatively common problem encountered in the oral and maxillofacial clinics. Multiple interventions and injections had been described in the literature for TMJ dislocation treatment. Ethanolamine Oleate is a sclerosing agent that can be used in the treatment of TMJ dislocation by creation of inflammatory reaction which induces fibrosis, formation of adhesion and scar formation in the surrounding soft tissues. Objectives: The aim of this study was to evaluate Ethanolamine Oleate injection in TMJ capsular and pericapsular tissue and its effect on the mouth opening in rabbits. Materials and methods: This experimental study was conducted on eight New Zealand rabbits (approximately 6 months old and weight 2-3 Kg). They were divided into two groups: Group One (Study Group): Eight of these rabbits were injected by Ethanolamine Oleate into their Temporomandibular Joints capsule and pericapsular tissues in the right side. (Group two): left side was acting as a control group. Each two rabbits were sacrificed at intervals of two, four, six and eight weeks. TMJ capsule and pericapsular tissues were dissected and prepared to evaluate the histopathologic changes. Results: The pericapsular tissue area surrounding the Temporomandibular Joint area showed similar histopathologic aspects in all samples. In fact, the pericapsular area showed angiogenesis with presence of fiber, new formed bone and cartilaginous hyaline tissue confirming the diagnosis of fibroblastic activity followed by zone of endochondral ossification and trabecular bone mixed with bone structures. Conclusions: Ethanolamine Oleate injection is a safe, simple, cost effective treatment of TMJ dislocation with minimal post-operative complication and foreign body reaction. Keywords: TMJ, Dislocation, Sclerosing.


> PDF

EVALUATION OF SHEAR BOND STRENGTH OF RESIN COMPOSITE TO ENAMEL SURFACE OF PERMANENT TEETH ERODED BY TWO CARBONATED BEVERAGES (IN VITRO STUDY)

Mohamed G. Hosni, Nadia A. Wahba, Adel A. Kamar, Omar A. El Meligy

> Show Abstract

ABSTRACT   Introduction: Dental hard tissue loss is one of the most challenging problems in dentistry. It is caused mainly by two factors, dental caries and erosion. Objectives: Evaluating and comparing in vitro the effect of two carbonated beverages on bonding of resin-composite material to human permanent enamel surface. Materials and methods: Twenty-four sound human permanent teeth were prepared and divided randomly according to exposure media into two equal groups (I and II). Each group was divided into two subgroups. Subgroups Ia and IIa served as experimental subgroups. Subgroups Ib and IIb were protected from the challenge and served as control. Group I: specimens were exposed to Coca-Cola Regular, group II: specimens were exposed to Fanta Orange; 3x/ 1 minute. Between the challenges, they were stored in artificial saliva for a total of 24 hours. They were then, restored with Adper Single Bond 2/ Filtek Z350 XT nanofilled composite. All specimens were subjected to shear bond strength test. Results: Mann-Whitney U test and  Kruskal-Wallis were used to evaluate the difference between the tested groups. Composite material in eroded specimens showed lower bond strength than that in uneroded specimens with no significant difference between the two-erosive media (P>0.05). Conclusions: Retention of composite resin to enamel surface was affected by acidic soft drinks as evidenced by lower shear bond strength. Keywords: Carbonated beverages; resin composite; shear bond strength; Coca-Cola Regular; Fanta Orange.


> PDF

COMPARATIVE STUDY BETWEEN 2 TYPES OF PROLOTHERAPY IN TREATMENT OF CHRONIC RECURRENT TEMPOROMANDIBULAR JOINT DISLOCATION

Nahla A. Khamis, Saeeda M. Osman, Nevein S. Mohamed

> Show Abstract

ABSTRACT   Introduction: Temporomandibular Joint (TMJ) dislocation when condyles travel anterior to articular eminence. It may be reducible or irreducible. Chronic recurrent TMJ dislocation was treated by surgical and nonsurgical methods. Minimally invasive methods include injection of sclerosing agents intra-articular and extra-capsular or botulinum toxin to the surrounding muscles. Prolotherapy is a method of strengthening lax ligaments by injecting various types of sclerosing or proliferant solutions such as ethanolamine oleate 5%, autologus blood and others. It is also known as \"ligament sclerotherapy\" or \"regenerative injection therapy\" Objectives: the study aimed to compare 2 types of prolotherapy (autologous blood & ethanolamine Oleate sclerosing agent) injection in treatment of chronic recurrent temporomandibular joint dislocation. Materials and methods: : this study was parallel, controlled, randomized, clinical trial. The study was conducted at Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Alexandria University, Egypt. Thirty patients with chronic recurrent temporomandibular joint dislocation were chosen with certain inclusion and exclusion criteria. Fifteen participants were injected with ethanolamine oleate compared with fifteen patients were injected with autologous blood and were followed-up for six months. The participated patients were assessed at the pre- and post-treatment stages by evaluating pain and mandibular range of motion clinically and radiographically using Magnatic Resonance Imaging (MRI) to evaluate condyle-articular eminence relation in opening and closing mouth. Results: There was no significant difference between both prolotherapies in treating chronic recurrent temporomandibular joint dislocation. Conclusions: Ethanolamine oleate and autologus blood injection are simple, safe and cost-effective treatment for management of chronic recurrent temporomandibular joint dislocation. Keywords: Prolotherapy, Temporomandibular Joint dislocation, autologous blood, ethanolamine oleate.


> PDF

THE EFFECT OF DEPROTEINIZATION PRIOR TO ENAMEL ACID ETCHING ON PIT AND FISSURE SEALANT SHEAR BOND STRENGTH AND NANOLEAKAGE IN PERMANENT TEETH (IN-VITRO STUDY)

Omneya M. Mowiena, Nadia A. Wahba, Sonia El-Shabrawy, Dalia M. Talaat

> Show Abstract

ABSTRACT   Introduction: Enamel deproteinization before acid etching can be used as a method to improve and enhance the sealant’s retentive and sealing ability Objectives: To assess and compare the sealant shear bond strength and nanoleakage after placement on etched enamel with and without prior deproteinization. Materials and methods: Eighty extracted sound human permanent teeth were selected. These were randomly divided into two groups according to the enamel treatment methods, where group A (experimental group): deproteinization prior to acid etching and group B (control group): acid etching without deproteinization. Each group was further subdivided equally into two subgroups (n=20) according to the test used whether shear bond strength and nanoleakage respectively. Shear bond strength test: Shear bond strength was measured using universal testing machine. Mode of failure of each specimen was determined using stereomicroscope. Nanoleakage test: Sealed teeth were then thermocycled, immersed in 50% silver nitrate solution for 24 hours, sectioned and evaluated quantitatively using energy dispersive x-ray spectrometer (EDX) and qualitatively using scanning electron microscope (SEM). Data were collected, tabulated and statistically analyzed using Mann-Whitney U test (P<0.05), chi square test and Post-hoc analysis. Results: The rate of sealant shear bond strength was similar between the two groups (P=0.678), but the rate of sealant nanoleakage was significantly lower in the enamel deproteinization group (P<0.001) than in the control group. Conclusions: Deproteinization method prior to enamel acid etching improved shear bond strength and sealing ability of sealants.. Keywords: sealant, deproteinization, shear bond strength, nanoleakage.


> PDF

FLUORIDE RELEASE AND RERELEASE AFTER RECHARGING OF TWO HYBRID RESIN RESTORATIONS IN PRIMARY TEETH. “A COMPARATIVE IN VITRO STUDY”.

Rania A. Elshweekh. Niveen S. Bakry. Dalia AM. Talaat. Dawlat M. Ahmed

> Show Abstract

ABSTRACT INTRODUCTION: Fluoride-releasing restorative materials can be used as a reservoir releasing small amounts of fluoride to the teeth over a long time.Giomer represents a new class of dental materials that uses the pre reacted glass technology (PRG) with excellent mechanical and esthetic properties. OBJECTIVES: The aim of this study is to evaluate the fluoride release ability of Giomer (Beautifil II) compared to Compomer (Dyract XP) and their fluoride recharge ability after exposure to topical fluoride varnish. MATERIALS AND METHODS: The sample consisted of 80 freshly extracted primary anterior teeth. Standardized buccal class V cavities were prepared. Sample was randomly divided into 2 groups: Group I: included 40 teeth restored with Beautiful II. Group II: included 40 teeth restored with Dyract XP following the manufacturer’s guidelines. Fluoride release was evaluated in the artificial saliva on 1st, 7th, 14th and 21st days. After 21days of release, 5%NaF varnish was applied on buccal surface of all specimens. The amount of fluoride release after recharge was measured in the artificial saliva after 1st, 7th, 14th and 21st days using fluorine ion- specific electrode. Data were analyzed using Friedman’s two-way analysis of variance by ranks, Dunn-Sidak method, Mann-Whitney U test and Wilcoxon Signed Ranks to achieve the aim of the study. RESULTS: Beautiful II released significantly higher amount of fluoride compared to Dyract XP in first 7 days at p<0.0125. Dyract XP released significantly higher amount of fluoride after 14 and 21 days at p<0.0125. After 5%NaF varnish treatment there was no significant difference in fluoride re-release amount of both Beautiful II and Dyract XP at p>0.0125. CONCLUSIONS: Fluoride release (ppm) was found to be significantly higher in Beautiful II than Dyract XP in the first week. Giomer could be considered a suitable class V restoration of primary teeth in high caries risk children.


> PDF

EVALUATION OF AMNIOTIC MEMBRANE IN TREATMENT OF CERVICO-FACIAL KELOID SCARS

Sameh M. Hassan, Ahmed M. EL Sabbagh, Ahmed S. El Mahalawy

> Show Abstract

ABSTRACT Introduction: Amniotic membrane is the innermost layer of the placenta consisting of a thick basement membrane and an avascular stromal matrix. It can be used as a graft and as a dressing to promote healing. Objective: Evaluation of the use of amniotic membrane in cases with keloids in Cervico-facial region. Materials and method: A clinical study was conducted on 10 patients with keloids. The sample was selected conveniently to fulfill a list of inclusion and exclusion criteria. Then the selected participants have undergone surgical excision of the scar with placement of amniotic membrane under the skin at the excised site and wound closure by primary intention and amniotic membrane was used as a dressing as well. Follow up and clinical evaluation was performed over a period of 3 months using Vancouver Score Scale. Results: Follow‐up data collected 3months after the final treatment revealed decreases in the mean score for the following lesion features. Pigmentation from 1.3 to 1.1; Vascularity from 1.3 to 1.2; Pliability from 3.7 to 2.7 and height from 1.6 to 1.1. Conclusion: The present study showed that the combination of surgical excision and Amniotic membrane placement can be used as a new alternative in treatment of keloid scars. Keywords: Amniotic membrane allograft, keloid scars, wound healing, Vancouver Score Scale. Running title: amniotic membrane as an allograft in patients with keloid scars.


> PDF