Al-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Efficacy of thymoquinone in chemoprevention and treatment of acrylamide-induced striated muscle degeneration of rat`s tongue (Histological and histochemical study)1137169910.21608/ajdsm.2019.71699ENSalahElsawyDemonstrator, Department of Oral and Dental Pathology, Faculty of Dental Medicine (Boys- Cairo), Al-Azhar UniversityKamal Abd-ElrhamanKamalLecturer of Oral and Dental Pathology, Faculty of Dental Medicine (Boys- Cairo, Al-Azhar University.Mohamed Gomaa AttiaZouairProfessor and Chairman of Oral and Dental Pathology Department, Faculty of Dental Medicine, (Boys-Cairo), Al-Azhar University.Journal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Aim: To assess the effect of Thymoquinone as anew chemopreventive and treatment modality on acrylamide (ARC)-induced striated muscle degeneration of rat’s tongue, the present study was performed. Material and methods: Forty adult male albino Sprague–Dawley rats were used as experimental animals and divided into four equal groups (G(s)): 10 animals in each one for two successive periods (5 animals for 20 days: GA) and (the other 5 animals for 40 days: GB). The groups used were as follow: G1(A&B) {negative control group}, G2(A&B) {positive control group: ARC treatment group}, G3(A&B){Thymoquinone chemoprevention group}: ARC + Thymoquinone, alternatively} and G4(A&B) {Thymoquinone therapeutic group} In this group, animals were received ACR as mentioned in G2, followed by Thymoquinone (20 mg/kg) injection intraperitoneally once daily for 3 times as follow: first day, third day and the fifth day. After termination of the experiment, the tongue of the animals were examined then the animals were euthanized and the tongue were excised, fixed in 10% neutral buffered formalin, routinely processed and stained with hematoxylin and eosin (H&E) stain as well as with PTAH stain in order to be examined microscopically and histomorphometrically. Results: Gross observation revealed that there was a variation in the areas of swelling, redness and bleeding that ranged from small patches in G3, moderate in G4 to large areas in G2. Histopathological findings demonstrated various alterations in the pattern of muscle fibers in the groups used throughout the experimental periods. These alterations included abnormal wavy course of the muscle fibers with splitting of the myofibers and fragmentation of the sarcoplasm. The histomorphometric results revealed that PTAH staining has variability in the area percentage throughout the groups used. There were significant differences between G1 and G2A, G1 and G3A, G1 and G4A, G2A and G4A, G3A and G4A. In conclusions: Realization of striated muscle damage in rat`s tongue by ACR which becomes worse with prolonged duration. Moreover Thymoquinone has a significant protective effect when compared with its therapeutic effect on ACR-induced striated muscle injury of rat`s tongue.</span>https://ajdsm.journals.ekb.eg/article_71699_01422c9dc32674d2c7a4d14721c3c7f6.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Evaluation of mini-locking plate system in management of body mandibular fracture (Clinical study)15237170010.21608/ajdsm.2019.71700ENMohamedM GhoniemLecturer of Oral and Maxillofacial Surgery, Faculty of Dental Medicine (Sinai University)Bahaa El-DinA TawfikAss. Professor of Oral and Maxillofacial Surgery, Faculty of Dental Medicine (Boys- Cairo, Al-Azhar University).Journal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Aim: To evaluate the mini-locking plate system in management of body mandibular fracture. Patient and methods: Twenty patients were randomly classified into two equal groups. Group (1): (The study group): Ten patients were treated by open reduction and internal fixation using single 2.0mm locking plate and arch bar as a tension band maintained for 5 weeks. Group (2): (The control group) Ten patients received the same treatment as in group (1) but with single 2.0mm conventional plate. Follow- up was performed for 6 months and post-operative complications such as infection, wound dehiscence, neurosensory disturbances and malocclusion were recorded. Arch bar was removed after 5 weeks of surgery. Data regarding age, sex, and bone density at the fracture side during healing, bite force measurements at anterior, premolar and molar regions were collected, tabulated and statistically analyzed using IBM SPSS software package version 20.0. Results: Uneventful healing of all fractures treated with mini-locking plates and conventional plate system, with no cases of malunion, nonunion, infection, or malocclusion being observed through the follow up periods. There was statistically difference between both groups regarding the mean bone density one week, 1, 3 and 6 months post-operatively. Bite force recording showed increasing values at subsequent follow ups corresponding to the healing of the fracture in both groups. Conclusion: Bone density in group (1) was in an accelerated pattern and of higher value than that of group (2). Patients treated with locking plate screw system regain more bite force compared to those treated with conventional miniplate screw system. </span>https://ajdsm.journals.ekb.eg/article_71700_09fb53610a8f9399fa8d1b66362bad09.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Evaluation of advanced-PRF with xenograft for obliteration of bone cavity in anterior maxillary region25307170110.21608/ajdsm.2019.71701ENTarekS MohamedDentist at Ministry of Health.ElsaeedM AbdellatifProfessor, Head of Oral and Maxillofacial Surgery Department, Faculty of Dental Medicine, Boys, Cairo, Al-Azhar University.WaelA ElmohandesProfessor, Department of Oral and Maxillofacial Surgery Faculty of Dental Medicine, Boys, Cairo, Al-Azhar University.Journal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Objective: was to evaluate the clinical outcomes of the use of Advanced-PRF with xenograft for obliteration of bone cavity in anterior maxillary region. Methods: this study included ten patients suffering from a cystic lesion in anterior maxillary area causing bony defect. Clinical examination was made to ensure the cases and to exclude any interfering maters. Radiographic examination was done preoperatively using digital panoramic x-ray and CT to ensure size will be of a critical size defect. Endodontic treatment for the corresponding teeth has been done before surgery. A-PRF has been prepared as soon before surgery to enucleate the lesion and apicectomy then xenograft block with A-PRF was put into the cavity. Follow up was done to evaluate clinical and radiographic progress. All reading was recorded and analyzed statistically. Results: The study showed an improvement in clinical features and bone density. Conclusion: The application graft with (A-PRF) is very effective in improving the healing process as well as decreasing the postoperative complication.</span>https://ajdsm.journals.ekb.eg/article_71701_0971a9d5849159960f079bdef5702c2b.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101The Effect of disinfectants pretreatment on microtensile bond strength of nanocomposite to dentin (an in vitro study)31377170310.21608/ajdsm.2019.71703ENNadyI MohammedAssistant Professor, Operative Department, Faculty of Dental Medicine, Al-Azhar University (Cairo)Journal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">This study evaluated the effect of three different anti-bacterial cleansing agents on tensile bond strength of composite to dentin. Materials Methods; Flat dentin surface of 12 molars was prepared, the teeth were divided into four main equal groups according to surface pretreatment (three types of disinfectant pretreatment and one control); group chlorhexidine digluconate (CHX), group Cetyl pyridinium chloride (CPC), group Pomegranate peel extracts (PPE) and group Control (no pretreatment). Then, nanocomposite was built up bonded to the treated surfaces with an adhesive system. Then, the teeth were sectioned perpendicular to composite–teeth interface to obtain 120 rectangular sticks, and the tensile bond strength testing after storage in water for one day, one month, and three months. Finally, (random specimens) one specimen from each group of storage time (one day, and three months) were used for scanning electron microscope examination to evaluate the failure mode and the effect of various treatments on the dentin surface topography. Result; The highest tensile bond strength (27.139±2.72 MPa) was recorded for specimens treated with (CHX) after 1-day storage time while the lowest tensile bond strength (15.33±2.44 MPa) was recorded for specimens treated with (PPE) after 3 months storage time. Conclusions; CHX application before bonding with adhesive preserve bond strength over time. Using CHX, CPC and PPE have no adverse effect on the bond strength. Storage in water has a highly significant adverse effect on the bond strength to all groups especially with treated with PPE and with no surface treatment. </span>https://ajdsm.journals.ekb.eg/article_71703_2ace9800a6bf0c044346f313b26c7719.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Therapeutic efficacy of vitamin D on acrylamide induced striated muscles dystrophy of rat’s tongue (Histological and histochemical study)39467171110.21608/ajdsm.2019.71711ENAbd El-HamiedSalah Eldin El-ZarkaDemonstrator of Oral and Dental Pathology, Faculty of Dental Medicine (Boys- Cairo), Al-Azhar University.Kamal Abd-ElrhamanKamalLecturer of Oral and Dental Pathology, Faculty of Dental Medicine (Boys- Cairo), Al-Azhar University.Mohamed MahmoudAhmedProfessor of Oral and Dental Pathology, Faculty of Dental Medicine (Boys- Cairo), Al-Azhar University.Journal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Aim: The aim of the present study was be directed to evaluate therapeutic efficacy of vitamin D on acrylamide (ACR) induced striated muscles dystrophy of rat’s tongue. Material and methods: Forty adult male albino rats were used as experimental animals and divided into four equal groups (G(s)):10 animals in each one for two successive periods (5 animals for 20 days: GA) and (the other 5 animals for 40 days: GB). After termination of the experiment, the tongue Tissue sections were cut at 4 µm for hematoxylin and eosin (H&E) staining, another tissue section were cut at 3µm for staining with Phosphotungestic acid haematoxylin (PTAH). Results: Gross observation results of tongue mucosa in the various groups used, throughout the experimental periods, showed various changes compared to G1. The histomorphometric results revealed that PTAH staining has variability in the area percentage throughout the groups used. There were high significant differences between (G2A and G3A), and (G2B and G3B). In conclusions: Realization of striated muscle damage in rat`s tongue by ACR which becomes worse with prolonged duration. Moreover vitamin D has a significant protective effect when compared with its therapeutic effect on ACR-induced striated muscle injury of rat’s tongue.</span>https://ajdsm.journals.ekb.eg/article_71711_a79fdd4bf89ef5c82e767be15cfd4030.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Buccal bone graft with surgically assisted rapid maxillary expansion in young adults; A cone beam computerized tomographic comparative study47527171310.21608/ajdsm.2019.71713ENAbdullahM AgniahMCs Candidate, Dentist, Ministry of Health- Baniwalied- LibyaAshrafA El-BedwehiProfessor, Department of Orthodontics, Faculty of Dental Medicine (Boys) and Vice president for graduate studies and research, Al-Azhar University, Cairo, Egypt.HusseinN Al-khalifaLecturers, Department of Orthodontics, Faculty of Dental Medicine (Boys), Al-Azhar University, Cairo, Egypt.WaelA Al-MohandesAssistants professor and head, Department of Oral and Maxillofacial Surgery, Faculty of Dental Medicine (Boys), Al-Azhar University, Cairo, EgyptJournal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Objectives: The aim of this study was to evaluate the dentoskeletal effect of buccal bone graft with buccal surgically assisted rapid maxillary expansion in young adults using cone beam computed tomography. Methods: The current randomized clinical study was conducted on a total sample of 21 orthodontic patients. The sample with mean age 20 Y. CBCTs were taken before and after orthodontic expansion. The patients were divided in to three groups, group I: consisted 7 patients treated with Hyrax expander, in conjunction with selected Buccopalatal corticotomy, group II: consisted 7 patients treated with Hyrax expander, in conjunction with selected Buccal corticotomy only, group III consisted 7 patients treated with Hyrax expander, in conjunction with selected Buccal corticotomy only, followed by immediately placement of bone graft directly over the decorticated plate. Results: The results showed high significant increase in buccal bone thickness in the group III. On the other hand, there was a significant decrease increase in buccal bone thickness in groups I&II. Conclusion: The buccal bone graft with surgically assisted RME in young adult leads to increase in buccal bone thickness than the other technique without bone graft. The other two techniques without bone graft showed significant reduction in buccal bone thickness.</span>https://ajdsm.journals.ekb.eg/article_71713_1e86cef1b5f50357c55e4f2c729e733f.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Evaluation of transverse dental changes after surgical assisted rapid maxillary expansion in adults53577171610.21608/ajdsm.2019.71716ENArafa Gad AllahIbrahimAssistant Lecturer of Oral and Maxillofacial Surgery, Faculty of Dental Medicine, (Asiut Branch) Al-Azhar UniversityMansour MohammadHusseinProfessor of Oral and Maxillofacial Surgery, Faculty of Dental Medicine (Cairo) Al-Azhar UniversityMohammad Abd ElhamiedShumanAssistant professor of Oral and Maxillofacial Surgery, Faculty of Dental Medicine, (Asiut Branch) Al-Azhar UniversityJournal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Objectives: Surgical assisted rapid maxillary expansion (SARM can affect both skeletal and dental shape and soft tissue the size of the nasal passages and airway resistance, favoring improved nasal respiration. Aim: The aim of this study was to evaluation of transverse dental changes after surgical assisted rapid maxillary expansion in adults. Patients and Methods: The present study was carried out to clinically assessment of the surgical assisted rapid maxillary expansion. Nine healthy adult patients were used in this study. Surgical assisted rapid maxillary expansion was done. Patients were subjected to evaluation by study models. Results: Results of the current study have indicated that surgical assisted rapid maxillary expansion values of study models were higher. Conclusion: study models may be effective in clinically assessment of surgical assisted rapid maxillary expansion. </span>https://ajdsm.journals.ekb.eg/article_71716_0d7d7f924450f8eb013c018667f63006.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Effect of surgically assisted rapid maxillary expansion on the nasal airways59647171910.21608/ajdsm.2019.71719ENArafa Gad AllahIbrahimAssistant Lecturer of Oral and Maxillofacial Surgery, Faculty of Dental Medicine (Assiut) - Al-Azhar UniversityMansour MohammadHusseinProfessor of Oral and Maxillofacial Surgery, Faculty of Dental Medicine (Cairo) Al-Azhar UniversityMohammad Abd ElhamiedShumanAssistant professor of Oral and Maxillofacial Surgery, Faculty of Dental Medicine - (Asiut Branch) Al-Azhar UniversityJournal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Objectives: Transverse maxillary deficiency is a common problem among patients seeking orthodontics care. It is characterized by a narrow maxilla in relation to the rest of the craniofacial structures, a narrow palatal vault, and often a posterior cross bite. Aim: The aim of the present study was to evaluate the effect of surgically assisted rapid maxillary expansion on the nasal airways to measure outcome of nasofibroscopy in evaluation of nasal airways and to measure the changes in area of the nasal cavities. Patients and Methods: The present study was carried out on nine patients’ healthy adult. Surgical assisted rapid maxillary expansion (SARME) was done for each patient. All patients were assessed by nasofibroscopy for increasing in nasal cavities through the expansion period. Results: Results of the current study have indicated that nasofibroscopy values of surgical assisted rapid maxillary expansion were higher along the observation periods. The nasofibroscopy results showed increasing in nasal cavities. Conclusion: these results support the view that surgical assisted rapid maxillary expansion is effective in increasing of nasal cavities through the follow up period. </span>https://ajdsm.journals.ekb.eg/article_71719_9b35869dd25215fc1aea856101655bfe.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Evaluation of the antibacterial effect of three irrigant solutions in treatment of root canals of primary anterior teeth65687172010.21608/ajdsm.2019.71720ENAlaaA Amin(B.D.S) 2007G. Faculty of Dental Medicine. AL-Azhar University (Assuit branch).SamyY El BiomyProfessor, Pedodontics and Oral Health Department, Faculty of Dental Medicine, Boys-Cairo, Al-Azhar University.IbrahimF BarakatAssistant Professor, Pedodontics and Oral Health Department, Faculty of Dental medicine, Boys, Cairo, AL-Azhar University.Bahaa-eldinA AbdelradyLecturer, Department of Microbiology, Faculty of Pharmacy, Al-Azhar University, AssuitJournal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Purpose: To evaluate and compare the antibacterial effect of 0.5%Metronidazole, 2%Chlorhexidin e, and Normal saline irrigant solutions against Enterococcus Faecalis bacteria in treatment of root canals of primary anterior teeth. Materials and methods: This in-vivo study was carried out on Sixty, anterior, primary teeth of children ranging from three to five years of age. The teeth were equally divided into three groups (20 teeth each), based on the irrigant used during chemo mechanical preparation of the root canals. Result: There was no significance difference between the action of 2.0% Chlorhexidine and 0.5% Metronidazole against Enterococcus faecalis while there was a significant difference when they were compared with the action of normal saline. Conclusion: Both 0.5%Metronidazole and 2.0%Chlorhexidine appeared to be superior as final endodontic irrigants with higher antibacterial efficacy compared to saline. </span>https://ajdsm.journals.ekb.eg/article_71720_2e70f492834260bb1f5dabb048960cff.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Clinical and antibacterial assessment of resin infiltrate versus compomer as pit and fissure sealants69737172110.21608/ajdsm.2019.71721ENMohamedH. Abo NahasDentist at Egyptian Ministry of Health.SamyY. El BiomyProfessor, Pedodontics and Oral Health Department, Faculty of Dental Medicine, Boys-Cairo, Al-Azhar University.IbrahimF. BarakatAssistant Professor, Pedodontics and Oral Health Department, Faculty of Dental medicine, Boys, Cairo, AL-Azhar University.Journal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Purpose: The aim of the present study was to assess the clinical and antibacterial effectiveness of resin infiltrate versus Compomer as a pit and fissure sealant. Materials and methods: This in-vivo study was carried out on two hundred, young permanent molars of children ranging from six to twelve years of age. The teeth were equally divided into two groups (100 teeth each), based on the sealant material used in sealing the deep pits and fissures. Result: There was significance difference between the antibacterial effect of the Resin infiltration (ICON) and Compomer while there was significant difference between the clinical retention of Resin infiltration (ICON) and Compomer. Conclusion: Compomer has superior antibacterial action against streptococcus mutans than Resin infiltration (ICON). While Resin Infiltration has superior clinical retention than Compomer.</span>https://ajdsm.journals.ekb.eg/article_71721_1ab1ab91fb3f2807059bc0248111c29f.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Clinical and radiographic evaluation of bone augmentation around dental implant using different bone graft materials75807172210.21608/ajdsm.2019.71722ENMohammadS TawakolDentist: Ministry of HealthMohammedM KhedrProfessor and Head of Oral Medicine, Periodontology, Oral Diagnosis and Radiology Department, Faculty of Den-tal Medicine (Boys, Cairo), Al-Azhar UniversityAbdelfattahM AmerProfessor of Oral Medicine, Periodontology, Oral Diagnosis and Radiology Department, Faculty of Dental Medi-cine (Boys, Cairo), Al-Azhar UniversityJournal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Background: The present study evaluated the augmented bone around a dental implant utilizing synthetic bone (Sinoss Graft) or xenograft bone (Tutobone Graft) materials. Methods: A group of patients were divided into two groups, based on the graft material used. Group I Patients were treated by placing two dental implants, with guided bone regeneration using synthetic bone material. (Sinoss Graft) and Group II Patients were treated by placing two dental implants, with guided bone regeneration using xenograft bone material (Tutobone Graft). Results: GTR + Xenograft group recorded a higher Osstell measurement than GTR + synthetic bone group. In GTR +synthetic bone or GTR + xenograft groups; there was a statistically significant different. GTR + xenograft showed a higher bone density than GTR +synthetic bone group. Conclusion: Treatment of osseous defects using Xenografts in combination with GTR, generally, has significant better clinical outcome.</span>https://ajdsm.journals.ekb.eg/article_71722_ca5d7130b9553873d2479f200cdfa179.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Implant placement with Bio-Oss mixed platelet rich fibrin after ridge splitting in lower anterior area81867172310.21608/ajdsm.2019.71723ENJournal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Objective: to evaluate clinically and radiographically implant placement with Bio-Oss mixed with platelet rich fibrin after ridge splitting in lower anterior area. Methods: This study included 10 male patients suffering from loss of lower anterior teeth with bone loss leaving 7-8 mm of bone height and need implant to restore function in anterior region. The patients divided into two groups: In group (I) the patients treated with dental implant placement with Bio-Oss mixed platelet rich fibrin after ridge splitting in lower anterior mandible. In group (II) the patients treated with dental implant placement without the use of any graft material after ridge splitting in lower anterior mandible. Clinical examination was made to edentulous regions: Quality, quantity of the mucosa, contour of the underlying bone and crown to bone relationship. Preoperative Cone Beam Computed Tomography (CBCT) was taken for patient to determine alveolar bone height and width. The Bio-Oss graft mixed with PRF was packed carefully around implant and between buccal and lingual plate. Follow up was made to detect changes in bone density, ridge width and implant stability. All readings were recorded and analyses statistically. Results: the study showed a statistical improvement in ridge width, bone density and implant stability. Conclusion: PRF mixed with Bio-Oss provides a stable widening of the alveolar ridge, prevent soft tissue migration to gap around implant and prevent collapsed buccolingual plate of bone after ridge splitting technique.</span>Al-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Evaluation of the effect of beta-tri-calcium phosphate nano particles on bone defect healing in diabetic rats (Histological study)87937172510.21608/ajdsm.2019.71725ENWaelS AhmedDemonstrator, Oral Biology Department, Faculty of Dental Medicine, Al-Azhar University, Boys, CairoHanyA SherifProfessor of Oral Biology, Oral Biology Department, Faculty of Dental Medicine, Al-Azhar University, Boys, CairoGlalA NasrLecturer of Oral Biology, Oral Biology Department, Faculty of Dental Medicine, Al-Azhar University, Boys, CairoJournal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">The aim of this study was to evaluate histologically the bone defect’s regeneration after application of beta-tricalcium phosphate nanoparticles in diabetic rats. The experimental part was carried out on 16 adult male albino rats and their weight almost 250 gm., the animals were grouped into 2 equal groups as the following; group I (control diabetic) which had not receive the graft, group II (experimental diabetic) which had received the graft material (Nβ-TCP). Specimens were harvested on days 7 and 28 after surgical procedures, prepared and examined histologically by H&E stain, there were wide histological differences between the groups of this study along the different intervals of the study. The histological results demonstrated that there was obvious retardation in granulation tissue formation, organization and bone formation in the control diabetic group I than the other group along the different intervals of this study. This retardation in the healing of diabetic control group was due to the effect of diabetes as it reduces cellular proliferation in early callus, reduces collagen synthesis content, reduces osteoblastic activity and reduces bone mineralization. Moreover, there was great acceleration in granulation tissue formation, organization and bone formation in experimental diabetic group II which received the graft material. This enhancement in bone healing process was due to the stimulatory effect of Nβ-TCP on osteoblastic differentiation and enhanced functions of osteoblasts on nanophase ceramics.</span>https://ajdsm.journals.ekb.eg/article_71725_8dfe3a0ebc0c56506c0cee819905b25a.pdfAl-Azhar University; Faculty of DentistryAl-Azhar Journal of Dental Science1110-675122120190101Bone density assessments in multislice and cone-beam computed tomography using water, plaster of paris and motor oil phantom951017172810.21608/ajdsm.2019.71728ENHaythamA SedeekBDS, 2010 G, Faculty of Dental Medicine, Misr Inetrnational University.AkramA El-AwadyProfessor, Department of Oral Medicine, Periodontology, Diagnosis and Oral Radiology Faculty of Dental Medicine (Boys – Cairo) Al-Azhar UniversityMagdyK MohamedAss Professor , Department of Oral Medicine, Periodontology, Diagnosis and Oral Radiology Faculty of Dental Medicine (Boys – Cairo) Al-Azhar UniversityJournal Article20200217<span style="caret-color: #000000; color: #000000; font-family: Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">Background: The aim of the present study is to assess the image quality of multislice and cone-beam computed tomography using water, plaster of paris, and motor oil (WPO) phantom. Methods: A test object (radiographic phantom) were constructed, made up of 3 aligned acrylic cylinders filled with: (1) Distilled water, (2) Bubble free plaster, and (3) Motor oil. Subsequently, the cylinder was scanned with CBCT and MSCT using 3 FOV sizes with the cylinder positioned in the center of the FOVs. Test is made using multislice CT and 3 machines CBCT Planmeca, Vatech and Neotome. Results In the present study, Neotome, Planmeca and Vatech showed high significant measurements than MSCT in Plaster of Paris and Motor oil. The results of this study showed an excellent correlation between the voxel values from CBCT and the Hounsfield units derived from MSCT. Conclusion: In assessing density using CBCT, the Y = 0.682 (x) – 161 equation is therefore recommended.</span>https://ajdsm.journals.ekb.eg/article_71728_9251db674304ffbfd8946ee38b522bf4.pdf