Faculty Of Dentistry Research Paper

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3D Finite Element Study on Incomplete Osseointegration: Locator Attachment versus Ball Attachment
(Open Access Macedonian Journal of Medical Sciences, 2021-02) ElGabry, Hisham S; Yousief, Salah A; Moubarak, Amal H; Eltaftazani, Iman A; El-Anwar, Mohamad; El-Zawahry, Mohamed M
BACKGROUND: Incomplete implant osseointegration may affect the choice of the type of attachment to ensure less amount of bone resorption, periods of maintenance, and longer implant/attachment life-time. AIM: The aim of this study was to evaluate, using 3D FE analysis (FEA), the influence of two different types of attachments on the rate of bone resorption, need for maintenance and implant/attachment life time in cases of unpredictable osseointegration in various bone types and using different implant angulations. METHODS: Six finite element models were prepared; three for the locator attachment while the other three for the ball attachment. Each of the three models simulates vertical implant and inclined implants by 10° and 20° degrees. Frictional contact between implant and cortical bone simulated the incomplete osseointegration scenario. RESULTS: Non-linear static analysis results showed that locator attachment and its cap may have longer time life in comparison with the ball attachment and its cap. CONCLUSIONS: Both attachments were safe for cortical and spongy bone, while the cortical bone receives less Von Mises stress by up to 33% with the increased implant angulation.
Accuracy of ceramic restorations made with two CAD/CAM systems
(2013) Hamza T.A.; Ezzat H.A.; El-Hossary M.M.K.; El Megid Katamish H.A.; Shokry T.E.; Rosenstiel S.F.; Crown and Fixed Prosthodontics Department; Faculty of Dental Medicine; Al-Azhar University; Cairo; Egypt; Crown and Fixed Prosthodontics Department; Faculty of Dental Medicine; MSA University; 6th of October City; Egypt; Crown and Fixed Prosthodontics Department; Faculty of Oral and Dental Medicine; Cairo University; Cairo; Egypt; Division of Restorative and Prosthetic Dentistry; College of Dentistry; Ohio State University; Columbus; OH; United States
Statement of problem Different types of CAD/CAM systems are currently available, but information regarding which system produces the best marginal fit is lacking. Purpose The purpose of this study was to evaluate the effect of 2 different CAD/CAM systems (Cerec inLab, Kavo Everest) on the marginal fit of 2 types of zirconia-based and lithium disilicate crowns. Material and methods Forty zirconia-based and lithium disilicate crowns, 20 each, were fabricated with the Cerec inLab and Everest CAD/CAM systems on a specially designed stainless steel die to ensure the standardization of specimen shape and dimensions. The vertical marginal fit for all tested crowns was evaluated by using a digital microscope at �100 magnification, and the data were tabulated and statistically analyzed with 2-way ANOVA, followed by the Tukey honestly significant difference (HSD) test with a confidence level of.05 to determine the mean differences. Results The results showed that the CAD/CAM technique, ceramic type, and their interaction had a statistically significant effect on the mean marginal fit of both ceramic types tested. Conclusions Better marginal fit values were exhibited by the Everest CAD/CAM technique for both ceramic types tested. � 2013 The Editorial Council of the Journal of Prosthetic Dentistry.
ACCURACY OF CONE-BEAM COMPUTED TOMOGRAPHY (NEWTOM- GIANO) IN DETECTING ALVEOLAR BONE FENESTRATIONS WITH DIFFERENT VOXEL SIZES
(EDJ, 2019-01) Hossam, Ahmed Mohamed
Objectives: The purpose of this study was to evaluate the accuracy and reliability of cone-beam computed tomography (CBCT) in the diagnosis of fenestrations defects with different voxel sizes. Material and Methods: 128 Defects were created in eight dry skulls with a diameter of one, two, three and four millimeters on the buccal aspect, respectively in each quadrant. Measurements were obtained using a digital caliper. These were considered to be the gold standard. The skulls were scanned by CBCT (NewTom- Giano) at two settings: (a) Voxel size 0.3 mm Standard Resolution (SR) (b) voxel size 0.125 mm High Resolution (HR). The accuracy of the CBCT measurements was determined by comparing the mean of all radiographic measurements, using SAS software version 9.4 for data analysis with those of direct measurements and Duncan’s Multiple Range Test. Results: Statistical analysis for both SR and HR with the gold standard measurements for each defect on the skulls revealed statistically significant correlation between the radiographic measurements and real measurements (P ≤ 0.05) indicating accuracy, also no statistically significant difference was found within the measurements accuracy of each group (P > 0.05) with the different defects sizes. Duncan’s multiple range test revealed that the HR voxel size 0.125 mm is of slightly higher accuracy. Conclusion: Based on the results of the present study, CBCT (NewTom- Giano) has demonstrated high accuracy and reliability, in measuring different fenestration sizes with different resolution (HR 0.0125 mm and SR 0.300 mm voxels). Measurements were with same accuracy despite the slightly higher performance of HR (0.125 mm voxel)
Advancements in artificial intelligence algorithms for dental implant identification: A systematic review with meta-analysis
(Mosby Inc, 2024-01) Alqutaibi, Ahmed Yaseen; Algabri, Radhwan S; Elawady, Dina; Ibrahim, Wafaa Ibrahim
Abstract Statement of problem: The evidence regarding the application of artificial intelligence (AI) in identifying dental implant systems is currently inconclusive. The available studies present varying results and methodologies, making it difficult to draw definitive conclusions. Purpose: The purpose of this systematic review with meta-analysis was to comprehensively analyze and evaluate articles that investigate the application of AI in identifying and classifying dental implant systems. Material and methods: An electronic systematic review was conducted across 3 databases: MEDLINE/PubMed, Cochrane, and Scopus. Additionally, a manual search was performed. The inclusion criteria consisted of peer-reviewed studies investigating the accuracy of AI-based diagnostic tools on dental radiographs for identifying and classifying dental implant systems and comparing the results with those obtained by expert judges using manual techniques—the search strategy encompassed articles published until September 2023. The Quality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2) tool was used to assess the quality of included articles. Results: Twenty-two eligible articles were included in this review. These articles described the use of AI in detecting dental implants through conventional radiographs. The pooled data showed that dental implant identification had an overall accuracy of 92.56% (range 90.49% to 94.63%). Eleven studies showed a low risk of bias, 6 demonstrated some concern risk, and 5 showed a high risk of bias. Conclusions: AI models using panoramic and periapical radiographs can accurately identify and categorize dental implant systems. However, additional well-conducted research is recommended to identify the most common implant systems.
Angled ball and locator attachments for immediate loaded inclined implants used to retain maxillary overdentures: A cross over study of patient satisfaction and oral health related quality of life
(Wiely, 10/05/2022) Aboelez, Marwa Ahmed; Abo Elezz, Mona Galal; Abdraboh, Abdelrahman Elsaid; Elsyad, Moustafa Abdou
Objectives: The aim of this was to compare the influence of two different angulated abutment designs on patient satisfaction, oral health-related quality of life, and pros- thetic aspects of implant-supported maxillary overdentures. Materials and Methods: For this cross-over study, 18 patients with completely edentu- lous maxillary ridges opposing implant-retained mandibular overdentures received 4 implants between the maxillary sinuses using computer-guided surgery. The anterior implants were installed at canine/lateral incisor areas and inclined 15 labially. The pos- terior implants were inserted just anterior to the maxillary sinuses and inclined 15o dis- tally. Eight patients received maxillary overdentures retained by angled ball attachment (ball overdenture [BOD]) and angled locator attachment in random order. After 6 months, patients indicated satisfaction with their prosthesis using a visual analog scale (VAS), and oral health impact profile (OHIP-14). Moreover, postinsertion prosthodontic maintenance and complications were recorded for both attachments. Comparisons of patient satisfaction and prosthetic complications between groups were performed using the Wilcoxon matched-pairs test and the McNemar test, respectively. Results: Locator overdenture (LOD) recorded significantly higher scores than the BOD group regarding all the VAS questions except for ease of cleaning (p < 0.007). LOD recorded significantly higher patient satisfaction regarding the pronunciation of sounds (p = 0.009), painful aching (p = 0.018), feeling tense (p = 0.011), unsatisfac- tory diet (p = 0.013), irritability with people (p = 0.005), and life in general (p = 0.004). The most common complications were matrix activation/renewal (n = 34). BOD showed a significantly higher incidence of attachment loosening (p = 0.002), and teeth fracture (p = 0.049) than LOD. LOD showed a significantly higher incidence of attachment wear and replacement than BOD (p <0.001). There was no difference between groups regarding soft tissue complications. Conclusion: Within the limitations of this study, and in terms of improved patient- centered outcomes, angled locator attachments are recommended to retain maxillary implant overdentures opposed by implant retained mandibular overdentures at it was associated with increased patient satisfaction and oral health-related quality of life than angled ball attachments. However, locator attachment was associated with more postinsertion prosthodontic maintenance than ball attachment.
Anterior Maxilla Augmentation Using Palatal Bone Block with Platelet-Rich Fibrin: A Controlled Trial.
(EBSCOhost, 2016) Moussa, Mahmoud; Abou El-Dahab, Omnia; El Nahass, Hani
Purpose: This study was conducted to characterize clinically and radiographically the effect of using platelet-rich fibrin (PRF) autologous graft on the augmentation results of autogenous palatal bone blocks. Materials and Methods: Patients who suffered from horizontal alveolar bone defects in the anterior maxillary ridge (= 4.5 mm) with one or two missing teeth were augmented with autogenous palatal bone blocks 4 months prior to implant placement. PRF was used to cover the block in the test group, while only the block was used in the control. Bone width was measured with a manual caliper preaugmentation (t₀), and at 0 (t₁) and 4 months (t₂). Cone beam computed tomography (CBCT) scans were performed at t₀ and t₂. Nonparametric tests (Mann-Whitney, Friedman's, and Wilcoxon signed-rank tests) were used for the comparisons. The significance level was set at P = .05. Results: In the 14 sites (12 patients), all but one autograft (from the control group) integrated successfully after 4 months. No statistically significant difference was found between demographic data in the two groups. There was a statistically significant increase in the buccopalatal bone width in both groups by time as measured by CBCT as well as the manual caliper. The test group showed statistically significantly lower mean graft resorption than the control group (test, 0.8 ± 0.6 mm; control, 1.6 ± 0.9 mm; P = .006). Conclusion: Autogenous palatal bone block surface resorption is significantly decreased by the use of PRF coverage.
Antibacterial Effect of Pre-constructed 3D Bone Scaffolds before and after Modification with Propolis
(Scientific Foundation SPIROSKI, 02/01/2022) Hesham, Mai; Elshishtawy, Hisham; El Kady, Sherihan; Wahied, Dina
AIM: This study was to determine and compare the antibacterial activity of different scaffold materials before and after their modification with ethanolic extract of Egyptian propolis ethanolic extract of propolis (EEP). SETTINGS AND DESIGN: Preparation of the dry mass of propolis, preparation of EEP, preparation of the scaffolds, and antibacterial activity testing. MATERIALS AND METHODS: Four bacterial strains were used to determine the antibacterial activity of two different scaffold materials before and after their modification with EEP (15% and 25% by weight). RESULTS: Tricalcium phosphate + gelatin binder modified by 25% EEP exhibited the highest antibacterial activity against Escherichia coli. While, tricalcium phosphate + (alginate and cellulose nanowhiskers) binder modified by 25% EEP demonstrated the highest antibacterial activity Staphylococcus aureus, Streptococcus mutans, and Lactobacillus casei. CONCLUSIONS: It can be concluded that EEP had a significant effect on the antibacterial activity of both scaffold materials; the antibacterial activity was higher against Gram-positive bacteria.
Applications of Finite Element Analysis in Endodontics: A Systematic Review and Meta-Analysis
(Wolters Kluwer Medknow Publications, 2024-07) Abdelhafeez, Manal M
Background: Endodontics increasingly uses finite element analysis (FEA) to evaluate stress distribution, fracture resistance, and temperature changes in treated teeth. FEA's endodontic uses, benefits, and drawbacks are examined in this systematic review and meta-analysis. Methods: A PubMed systematic search found relevant studies published up to January 2022. Original endodontic research articles utilizing FEA to quantify stress distribution, fracture resistance, or temperature changes in treated teeth were eligible. The systematic review comprised 30 publications, 15 of which were meta-analyzed. Data were extracted using a standard form, and the 'Newcastle-Ottawa Scale (NOS)' for observational studies and the Cochrane risk of bias tool for randomized controlled trials assessed quality. Random-effects models calculated pooled effect sizes and 95% confidence intervals in RevMan 5.4 meta-analysis. Results: Meta-analysis shows FEA-guided endodontic treatment improves stress distribution (P < 0.001) and fracture resistance (P < 0.05) compared to conventional treatments. The temperature did not vary significantly (P = 0.12). Stress distribution had an effect size of 0.75 (95% CI: 0.65-0.85), fracture resistance 0.42 (95%: 0.12-0.72), and temperature variations -0.18. Conclusion: In conclusion, FEA is a valuable technique in endodontics for stress distribution study and fracture resistance testing. FEA models' accuracy, dependability, and clinical applicability were questioned, underlining the need for more research and development to maximize their endodontics clinical use.
Assessment of bone quality using buccal and palatal autogenous cortical shells harvested from two different mandibular donor sites for maxillary alveolar ridge augmentation: a histomorphometric randomized clinical trial
(Springer, 11/24/2020) Mounir, Mohamed; EL Morsy, Ola Alaa; Amer, Hatem; Mounir, Samy; Gibaly, Amr
Purpose This study aims to compare the quality of free autogenous bone grafts harvested from two different mandibular donor sites, used as onlay shells to augment horizontally and vertically deficient anterior maxillary alveolar ridges. Methods Fourteen patients with edentulous and atrophic anterior maxillae are randomly allocated into two groups. Seven symphyseal chin (group I) and seven retromolar (group II) mandibular bone grafts were harvested and fashioned to construct buccal and palatal frameworks, fixed in place with mini-screws, followed by compacting the inter-positional gaps with an equal particulate mix of xenograft and autogenous cancellous particulates. Six months later, 42 core biopsies, three from each patient, 21 for each study group, were retrieved before the implants' insertion and subjected to histomorphometric bone area percent analysis. Results The bone area percent of the newly formed bone augmented with the chin shells was 52.53 +/- 1.68% versus 47.97 +/- 1.83% for the retromolar grafts. The mean area percent difference between both groups was statistically significant (p = 0.0004). Conclusion A higher bone quality and more volumetric stability were associated with the symphyseal cortical shells.
Assessment of internal fit and micro leakage of conventionally fabricated ceramometallic restoration versus CAD wax and press veneering (in-vitro study)
(Springer Nature, 2021-05) Mansour, Fatema Khaled; Ibrahim, Rabab Mohammed; Mansour, Hoda; Hamdy, Ahmed Mohamed
Statement of problem Accuracy of internal fit and microleakage for CAD-CAM systems used in metal coping fabrication and veneered with layering or pressing porcelain in ceramometallic restoration is unclear. Material and methods A master metal die was milled to resemble the right mandibular first molar preparation for coverage with ceramometallic restoration. Master die was duplicated to twenty-four resin specimen dies.They were divided into two groups according to metal coping construction technique using either conventional (C) or CAD (D) wax. Each group was subdivided into two subgroups (n = 6) according to the technique of porcelain veneering (layered or pressed) to fabricate ceramometallic restorations, where subgroup (CL, DL) were conventionally layered by porcelain and (CP, DP) were press veneered. A standardized thickness of metal and porcelain was performed in all specimens as per manufacturer’s instructions for techniques ceramometallic restoration construction. Evaluation of internal fit was done with silicone replica technique using stereomicroscope at ×24 magnification where the thickness of silicon layer was measured at 20 reference points on each specimen. Then specimens were subjected to thermocycling. Sectioned specimens were assessed for microleakage using a stereomicroscope at ×12 magnification along die-cement interface with a five scale score. Results Mean internal gap values of veneering showed a statistically nonsignificant difference between specimens made with layering(L) and pressing(P). Different techniques of wax construction showed a non-significant difference in internal gap values between specimens made with conventional(C) and CAD(D) waxing. However, a significant difference was found in the internal gap at different sites. The highest internal gap was found at the occlusal surface, while the lowest gap was found at the finish line. The highest mean microleakage score was found with CAD wax and press veneering, while the lowest mean microleakage score was found with conventional wax and press veneering. Conclusion Both construction techniques of ceramometallic restoration were considered reliable in restoration production within a clinically acceptable range regarding internal fit and microleakage. There is a strong positive correlation between internal fit and microleakage of ceramometallic restoration constructed
Assessment of patient-specific titanium onlay versus autogenous inlay eminoplasty technique for treatment of recurrent temporomandibular joint dislocation: a randomized clinical trial
(Springer, 6/19/2020) Ihab, Rania; Mounir, Ragia; Ali, Sherif; Mounir, Mohamed
Purpose Various procedures have been adopted for eminence augmentation for treatment of recurrent temporomandibular joint dislocation. The aim of this study is to assess maximal incisal opening (MIO) using a custom-made titanium implant versus inlay autogenous augmentation from the patient’s chin for more stable condylar movements. Methods Ten patients were treated in this study (20 joints) five patients with bilateral patient-specific titanium onlay implant and five for autogenous inlay grafting technique; each implant in the study group was virtually designed using a specific software and milled from titanium grade V blocks, then fixed with mini screws at the lateral aspect of the zygomatic arch while in the control group, autogenous corticocancellous bone block was harvested from the chin and wedged at the created defect of the eminence to increase its height. Results The follow-up period ranged from 6 months to 1 year to access the maximal incisal opening (MIO). The mean preop- erative maximal incisal opening was 47.8 mm and that of the postoperative was 33.2 mm in the study group and 35.4 mm in the control group, respectively. One patient reported postoperative slight unilateral edema and pain that gradually diminishes after 1 month postoperative. Conclusion No statistical difference between both groups p value 0.3.
Assessment of Penetrability for Different Endodontic Irrigation Activating Techniques Using Cone-Beam Computed Tomography and Periapical Digital Radiography—An In Vitro Study
(Multidisciplinary Digital Publishing Institute (MDPI), 2023-06) Abdelhafeez, Manal M; Alharbi, Afnan S; Srivastava, Swati; Abdelaziz, Rehab; Eldwakhly, Elzahraa; Almohareb, Rahaf A; Algahtani, Fahda N; Soliman, Mai
The elimination of necrotic and inflamed pulp tissue, dentin debris, and microorganisms is essential for the success of endodontic treatment. However, the root canal’s complexity has led to incomplete cleaning and disinfection. This study aims to compare the efficacy of the penetrability of three different irrigation activating techniques to the apical third of the root canal. Sixty sound single- rooted human mandibular premolars are prepared with rotary instrumentation under continuous sodium hypochlorite irrigation. Three irrigation activation techniques are utilized: group 1 (n = 20), conventional needle irrigation (CN); group 2 (n = 20), side-vented endodontic needle irrigation (EN); and group 3 (n = 20), manual activation irrigation with gutta-percha cone (MA). The penetrability is assessed with the aid of a radiopaque irrigation solution using digital radiography in conjunction with cone-beam computed tomographic (CBCT) measurements. Data are analyzed using a statistical package for social sciences (SPSS), using multiple comparisons to compare the baseline and test values. One-way analysis of variance with post hoc analysis (Tukey honestly significant difference) is performed to detect the statistically significant differences between groups. Manual activation (MA) shows effective delivery of the irrigant into full WL, followed by endodontic needle (EN) and conventional (CN) methods of activation (p < 0.001). The results of the present study show that maximum penetrability of the irrigant is observed with manual activation (MA) using a gutta cone in comparison with the conventional needle (CN).
Assessment of the Proximity of the Inferior Alveolar Canal with the Mandibular Root Apices and Cortical Plates—A Retrospective Cone Beam Computed Tomographic Analysis
(Multidisciplinary Digital Publishing Institute (MDPI), 2022-10) Srivastava, Swati; Alharbi, Hanan M; Alharbi, Afnan S; Soliman, Mai; Eldwakhly, Elzahraa; Abdelhafeez, Manal M
Various endodontic interventions often lead to iatrogenic damage to the inferior alve- olar nerve present in the inferior alveolar canal (IAC). The purpose of the present study was to analyze the relationships of IAC with the root apices of mandibular teeth and with the mandibu- lar cortical plates. Materials: 116 cone beam computed tomography (CBCT) scans were exam- ined and the shortest distance of IAC with the root apices of mandibular canines, premolars and molars, and with cortical plates was analyzed. The data were statistically analyzed using SPSS. Results: The shortest mean distance between IAC and lingual cortical plate (LCP) was found in the third molar area, and between IAC and buccal cortical plate (BCP) in the second premolar area. A high incidence of 60% direct communication (DC) was present in mandibular second mo- lars; 38% in mandibular third molars; 13% in mandibular second premolars; 12% in mandibular first molars; and 1% in mandibular first premolars. Conclusion: Anteriorly, IAC was found to be significantly present in close approximation to the roots of mandibular canines. Posteriorly, IAC was found to be in significant proximity to the distal roots of mandibular second molars.
ASSESSMENT OF THE THERAPEUTIC EFFECTS OF AUTOLOGOUS BLOOD VERSUS DEXTROSE PROLOTHERAPY FOR THE TREATMENT OF TEMPORO- MANDIBULAR JOINT HYPERMOBILITY. A RANDOMIZED PROSPECTIVE CLINICAL STUDY
(EDJ,, 2019-07) Arafat, Shereen W.; Elbaz, Mohamed A.
Objectives: The aim of the current study was to assess the injection of autologous blood versus the dextrose prolotherapy for the treatment of TMJ hypermobility. Material & methods: This study was conducted on 30 patients who had TMJ subluxation. Patients were divided into 2 equal groups. Group A: 15 patients received autologous blood injection, and Group B: 15 patients received dextrose prolotherapy. Clinical evaluation was performed through Visual Analogue Scale (VAS) to assess patients’ pain preoperatively, at 2 weeks, 1, 3, and 6 months postoperatively. Painless maximum interincisal opening (MIO) was measured preoperatively, 2 weeks, and 3, 6 months postoperatively. Statistical analysis of data was performed. Results: Group B showed a significant (p≤0.001) higher MIO values compared to Group A for all follow-up intervals. There was Significant (p≤0.001) reduction in VAS scores at 2 weeks postoperatively in group A. While, the reduction in VAS at 2 weeks was non-significant (p≥0.001) in group B, but at 1 months postoperatively VAS started to show significant (p≤0.001) reduction. Conclusion: autologous blood injection was superior to dextrose prolotherapy regarding the number of injections needed, pain improvement, and maximal interincisal opening reduction.
Assessment of three dimensional bone augmentation of severely atrophied maxillary alveolar ridges using prebent titanium mesh vs customized poly-ether-ether-ketone (PEEK) mesh: A randomized clinical trial
(Blackwell Publishing Ltd, 2019) Mounir M.; Shalash M.; Mounir S.; Nassar Y.; El Khatib O.; Oral and Maxillofacial Surgery; Faculty of Dentistry; Cairo University and New Giza University; Cairo; Egypt; Surgery and Oral Medicine Department; National Research Centre; Cairo; Egypt; Oral and Maxillofacial Surgery; Faculty of Dentistry; MSA University; 6th of October City; Egypt; Oral and Maxillofacial Surgery; Faculty of Dentistry; Cairo University; Cairo; Egypt
Background: Alveolar bone grafting techniques and dental rehabilitation of patients with maxillary alveolar defects is a very challenging and costly procedure. Various methods have been described to reconstruct these defects in order to facilitate the placement of dental implants. The aim of this study was to assess three dimensional (3D) maxillary ridge augmentation using two innovative, accurate, and time saving protocols. Materials and Methods: Sixteen patients (32 implants) with vertically and horizontally deficient maxillary alveolar ridges, were equally allocated into 2 groups; a mix of particulate autogenous and xenogenic bone grafts loaded in a prebent titanium mesh (Control group) vs patient specific poly-ether-ether ketone meshes (Study group). Radiographic assessment was performed preoperatively, 1 week and 6 months postoperatively. Assessment included measurements of linear changes in the vertical and horizontal dimensions on cross sectional cuts of cone beam computed tomography using special software. Finally; the percentage of 3D bone gain in each group was compared to that of the other. Results: Wound healing was uneventful for all cases except one patient in each group were the meshes were exposed 2 weeks' postsurgery. There was no statistical significance between both groups (P value = 0.2). Conclusion: Within the limitations of the sample size of this study, both techniques could be used as a successful method of ridge augmentation with no statistical significance between them. � 2019 Wiley Periodicals, Inc.
Assessment of vertical ridge augmentation in anterior aesthetic zone using onlay xenografts with titanium mesh versus the inlay bone grafting technique: A randomized clinical trial
(Churchill Livingstone, 2017) Mounir M.; Mounir S.; Abou-Elfetouh A.; Shaker M.A.; Faculty of Dentistry; Oral and Maxillofacial Surgery Department; Cairo University; Egypt; Faculty of Dentistry; Oral and Maxillofacial Surgery Department; M.S.A University; Cairo; Egypt; Faculty of Dentistry; Oral and Maxillofacial Surgery Department; Al Faraby University; Jeddah; Saudi Arabia
The aim of this study was to evaluate the final vertical gain at the deficient anterior maxillary alveolar ridges using onlay bone grafts with titanium mesh versus inlay bone grafting. This was a single institutional randomized comparative clinical trial. The study population included 16 patients, with edentulous anterior maxillary alveolar ridges (40 implant sites) who were presented and treated at the Faculty of Oral and Dental Medicine in Cairo University from September 2013 to August 2015. Selected patients were randomly divided into two equal groups. The control group received onlay particulate xenograft together with titanium mesh as a space-maintaining device while the study group received inlay block xenograft (sandwich osteotomy) fixed with mini-plates. Assessment using cone beam computed tomography (CBCT) included the mean percentage of vertical gain at the proposed implant sites after 6 months taken from cross-sectional cuts. A total of 40 delayed implant placements were done. Results showed that there was no statistical significance between the two groups (P = 0.2); the mean percentage of 6 months postoperative vertical bone gain in the control group was 20.7% and that in the study group was 31.6%. 2017 International Association of Oral and Maxillofacial Surgeons
Association between laboratory markers and Covid-19 disease severity and outcome: a retrospective cohort study in Saudi Arabia
(Frontiers Media S.A., 2023-07) Alamoudi, Aliaa Amr; Eldakhakhny, Sahar; Banjar, Haneen; Ajabnoor, Ghada; Aljohani, Sama Badr; Basheer, Rasha Ramadan; Eldakhakhny, Basmah; Badawi, Mazen; Elsamanoudy, Ayman
Introduction: In Saudi Arabia, limited studies have evaluated factors including epidemiologic, clinical, and laboratory findings that are associated with COVID-19 disease. The aim of this paper was to identify laboratory parameters used in King Abdulaziz University Hospital which show an association with disease severity and patient outcome in the form of mortality. Methods: Age, gender, medical history, and laboratory parameters were all retrospectively assessed concerning disease severity and disease outcome in a total of 111 COVID-19 patients at King Abdulaziz University Hospital between July 2020 and August 2020. Patients were categorized into mild disease if they did not require ward admission, moderate if they met the Ministry of Health criteria for isolation ward admition, and severe if they were admitted to the ICU. Results: Age but not gender was associated with the disease severity X2 (4, N = 110) = 27.2, p <0.001. Of all laboratory parameters on admission, only the levels of Albumin appeared to be significantly associated X2 (2, N =70) = 6.6, p <0.05 with disease severity. Age but not gender was also significantly associated with disease outcome X2 (2, N = 110) = 12.8, p < 0.01. Interestingly, RBC count also showed a significant relation with disease outcome X2 (2, N = 71) = 6.1, p <0.05. Discussion: This study provides more understanding of the laboratory characteristics in our part of the world to efficiently manage the disease.
ATTACHMENT VERSUS CLASP RETAINED REMOVABLE PARTIAL DENTURES –A RANDOMIZED CONTROLLED CLINICAL TRIAL
(EDJ, 2019-04) Elawady, Dina Mohamed Ahmed; Ibrahim, Wafaa Ibrahim
Purpose: to compare two retainer designs for free end removable partial dentures (RPDs) by measuring the patient satisfaction, abutment tooth survival, bone height loss and pocket depth. Materials and Methods: Group 1: Fourteen patients receiving attachment-retained RPDs while group 2: Fourteen patients receiving clasp-retained RPDs. The assessment included patient satisfaction, survival of the terminal abutments, bone height loss and pocket depth. All patients were evaluated clinically and radiographically at the time of RPD insertion, twelve months and 24 months thereafter. Mann Whitney U test for independent samples was used for comparison of % change of patient satisfaction. Wilcoxon signed rank test for paired (matched) samples was used within group comparison of patient satisfaction before and after treatment. Survival analysis was done using Kaplan Meier statistics. For bone height, independent t-test was used and student’s t- test was used for pocket depth comparison. Results: There was a significant difference before and after treatment scores in Oral Health Impact Profile-14(OHIP-14), Orofacial Esthetic Scale (OES) and Chewing Function Questionnaire (CFQ) questionnaires in the clasp retained RPD group with P value = (0.001, 0.001 and 0.003) re- spectively. Regarding the attachment retained RPD group, there was a significant difference before and after treatment scores with P value = 0.001 for the three questionnaires. Within group compari- son it was found that there was a significant difference in OHIP-14 (P= 0.002) and OES (P<0.001) while there was no significant difference in CFQ between both groups (P=0.191). There was no statistically significant difference between both groups in terminal abutment survival (P=0.149) and percent change of the mean probing pocket depth from baseline to 24 months (P=0.05). However, regarding the effect of time on bone height change percentage for each group, a significant differ- ence was found between groups at baseline-twenty-four month’s interval (P-value < 0.05). Conclusion: Within the limitations of the present study, all patients have shown improvement in OHRQoL, esthetics and chewing function after treatment with RPDs with better results in the attachment retained RPD. However, regarding the terminal abutment survival, mean probing pocket depth and bone height change, clinically significant better results were revealed in clasp-retained RPD compared to attachment-retained RPDs
Autogenous Dentin Block of A Non Restorable Wisdom Tooth for Localized Horizontal Ridge Augmentation: Radiographic and Histological Analysis: A Preliminary Case Report
(WILEY, 111 RIVER ST, HOBOKEN 07030-5774, NJ USA, 2020-11) Elraee, L; Moussa, M; Adel-Khattab, D
Introduction: Tooth roots proved in different studies clinically and radiographically to be an alternative to autogenous bone. However, the histological evaluation of the tooth block following ridge augmentation is still missing. The aim of this case report was to evaluate histologically and radiographically the effect of autogenous dentin block (DB) to restore a horizontal ridge deficiency at a single tooth gap. Case Presentation: A healthy 36-years old female patient presented with a missing lower first molar (30), after clinical and radiographic examination, the site showed a class III defect horizontal atrophy. The procedure performed was the surgical removal of the wisdom tooth (32), shaping and fixation of a separated DB at the defect site using an osteosynthesis screw. A cone beam computed tomography was performed immediately and 6 month following the surgery. During implant placement, a core biopsy specimen was retrieved, stored and prepared for histological evaluation. The radiographic analysis showed a horizontal width gain of about 4 mm. The histologic assessment revealed cortical bone formation at the buccal and lingual aspects between the tooth and the bone. During implant placement, the core biopsy exhibited a slight separation upon removal from the grafted side, at 6 month following implant placement, the implant was successfully osteointegrated. Conclusion: DB was successfully used for horizontal alveolar ridge augmentation, thus allowing a prosthetically driven implant placement. More cases assessing implant survival and success are needed to confirm the results of this case report
Autogenous dentin block versus bone block for horizontal alveolar ridge augmentation and staged implant placement: A randomized controlled clinical trial including histologic assessment
(Wiely, 2022-05) Elraee, Leila; Abdel Gaber, Hala Kamal; Elsayed, Hakem H; Adel-Khattab, Doaa
Objectives: This study aimed to compare the dentin block (D-group) harvested from impacted wisdom teeth with autogenous ramus bone block (A-group) for horizontal alveolar ridge augmentation. Materials and methods: Forty two patients with anterior missing teeth and horizontal ridge defect were randomly assigned to two groups (n = 21 per group) to receive either dentin block group or autogenous bone block. Six months after the augmentation, dental implants were placed in all patients, and a core biopsy was performed for histological evaluation in addition to clinical and radiographic evaluation using cone beam computed tomography. Primary outcome was the mean overall clinical ridge width gain (CRWG) after 6 months of augmentation. Secondary outcomes were the overall radiographic ridge width gain (RRWG) after 6 months of augmentation and descriptive histological analysis with histomorphometric assessment of bone fraction %. Results: All sites healed uneventfully, and the mean overall CRWG 6 months after augmentation was 3.52 ± 0.56 mm and 2.24 ± 0.86 mm in the D and A groups, respectively, with statistically significant difference between them (P = < 0.001). The overall mean RRWG was 3.61 ± 0.61 mm and 3.41 ± 1.15 mm in D and A groups,respectively, without any statistically significant difference between them (P = 0.062) . The histomorphometric analysis of the bone area fraction was 42.6% and 41.3% in D and A groups, respectively, without any statistically significant difference between the two values (P = 0.89, Student's t-test). Histological evaluation in the D-group revealed new bone formation, viable cells, and matrix formation on the dentin block periphery, in addition to well-organized woven bone that suggests dentin block remodeling and supports new bone deposition. Conclusion: The present clinical study revealed that dentin block may serve as an alternative graft to support horizontal alveolar ridge augmentation. Dentin blocks showed less resorption than autogenous bone blocks.

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