Mona Abou El Fotouh | Ain Shams University (original) (raw)

Uploads

Papers by Mona Abou El Fotouh

Deleted Journal, Mar 1, 2024

Aim: This study aimed to assess the accuracy of the 3D printed model by DLP technology at 50-µm a... more Aim: This study aimed to assess the accuracy of the 3D printed model by DLP technology at 50-µm and 100-µm layer height Materials and Methods: A desktop scanner, R700 desktop scanner (3Shape, Copenhagen, Denmark) was used to scan an orthodontic typo-dent cast. A total number of (20) models were printed using a Digital Light Processing 3D printer and divided into two separate group. The 1 st group (n=10) and the 2 nd (n=10) groups were printed at 50-μm and 100-μm layer heights respectively. Assessment was performed using the GOM Inspect suite to register both the reference and 3D printed digital models to detect the deviation in both X, Y, and Z axes. Results: Data were presented as mean and standard deviation values and were tested for normality using Shapiro-Wilk test. Data were non-parametric and were tested using Wilcoxon signed rank test. The significance level was set at p≤0.05 within all tests. In the molar area, 50-µm layer thickness showed statistically significant difference in the right side when compared with 100µm. In the premolar region, there was no statistically significant differences between both groups in the right side except for the z-axis. The canine area demonstrated that the 50-µm layer height was statistically significant lower in deviation than 100-µm group in all directions. There was a strong agreement between both observers (ICC=0.965, 95%CI= (0.958:0.971), p<0.001). Conclusion: the results of our research as a whole show that models printed at 50-μm display lower deviations in X, Y, and Z axes with a more consistent distortion pattern when compared to 100-μm models. Besides, the ideal thickness for high precision requirements is 50 µm, whereas 100-μm could be used in printing diagnostic models.

Background: Additive manufacturing is widely used in the dental field. The accuracy of the printe... more Background: Additive manufacturing is widely used in the dental field. The accuracy of the printed object produced by additive manufacturer is considered questionable based on the printer’s type, resolution, and the layer height. This study aimed to assess the accuracy of the 3D printed model by DLP technology at 50-µm and 100-µm layer height Methodology: A desktop scanner, R700 desktop scanner (3Shape, Copenhagen, Denmark) was used to scan an orthodontic typo-dent cast to acquire digital scans. A total number of (20) models were printed using a Digital Light Processing 3D printer and divided into two separate group. The 1st group (n=10) and the 2nd (n=10) groups were printed at 50-μm and 100-μm layer heights respectively. All printed models were digitally scanned. Assessment was performed using the GOM Inspect suite to register both the reference and 3D printed digital models to detect the deviation in both X, Y, and Z axes. Results: In the molar area, 50-µm layer thickness showed ...

Egyptian Dental Journal, 2016

Temporomandibular disorders (TMD) describe any articular or muscular problem of the jaw joint. TM... more Temporomandibular disorders (TMD) describe any articular or muscular problem of the jaw joint. TMJ osteoarthritis is caused by alternating degenerative and regenerative episodes causing structural changes of the joint components such as erosion, flattening, osteophytes or reduced joint space. 1

Ain Shams Dental Journal, 2014

Egyptian Dental Journal, 2019

Objective: The purpose of this study was to investigate maxillofacial morphology using CBCT with ... more Objective: The purpose of this study was to investigate maxillofacial morphology using CBCT with the ultimate goal of finding whether differences existed in a two suggested subtypes of nonsyndromic bilateral cleft lip and palate (BCLP) patients. Design: This retrospective study included CBCT data of 22 BCLP patients with mean age of 9.6 years. The patients were divided initially according to premaxillary characteristics into two groups and this classification was further confirmed by measurement of sella-nasion-point A angle (SNA), Group (P): This represent BCLP characterized by well-developed (P) prominent pre-maxilla and SNA >80±2, Group(R): This represent BCLP characterized by ill-developed (R) rudimentary pre-maxilla and SNA < 80±2. The relation between maxilla and mandible measured by point A-nasion-B point angle (ANB), angle of septal deviation (ASD) and anterior upper facial height (AUFH) were assessed using On-demand 3D software and was compared among the two groups. Results: Patients within group P showed significantly higher ANB (P value ≤ 0.001). Patients within group R showed significantly higher ASD angle (P value ≤ 0.05), while AUFH showed insignificant difference between the two groups (P value ≥ 0.05). Conclusions: Maxillofacial morphology measurements assessed in this study support that difference exist between the two investigated subtypes of non-syndromic BCLP.

Clinical Oral Investigations, 2021

OBJECTIVES To evaluate the effects of different types of restorations on observer ability to dete... more OBJECTIVES To evaluate the effects of different types of restorations on observer ability to detect proximal caries in CBCT images. MATERIALS AND METHODS Forty human premolars and molars with artificial proximal caries were placed proximal and distal to 5 molars having different restorations (amalgam, composite, resin-modified glass ionomer cement (RMGIC) fillings, zirconia, and lithium disilicate crowns) and a non-restored molar. CBCT scans were obtained using i-CAT® Next Generation. Images were rated twice by 2 observers. The exact depth of artificial caries was histologically established. Sensitivity, specificity, and area under the receiver operating characteristic curve (Az) values were calculated. RESULTS Caries detection in teeth surfaces mesial and distal to amalgam showed compromised specificity and accuracy. Moreover, caries detection in teeth surfaces mesial to zirconia crown showed low sensitivity, specificity, and accuracy. Capability of CBCT in detection of proximal caries in teeth adjacent to composite, RMGIC, and lithium disilicate was comparable to those adjacent to non-restored molar. CONCLUSIONS CBCT scans performed for tasks other than caries detection should be assessed for proximal caries in absence of any restorations as well as in presence of composite, RMGIC fillings, and lithium disilicate crowns. However, CBCT should not be used for proximal caries detection in teeth adjacent to amalgam and teeth surfaces mesial to zirconia crowns. CLINICAL SIGNIFICANCE It is important to investigate the influence of artifacts produced by various restorations on CBCT-based caries detection to optimize CBCT benefits, caries diagnosis and avoid unnecessary treatment of sound surfaces.

The Cleft Palate-Craniofacial Journal, 2018

Objective: The objective of this study was to assess the volume, area, and dimensions of the orop... more Objective: The objective of this study was to assess the volume, area, and dimensions of the oropharyngeal airway (OPA) in a previously repaired nonsyndromic unilateral cleft lip and palate (UCLP) versus bilateral cleft lip and palate (BCLP) patients when compared with noncleft controls using cone beam computed tomography (CBCT). Design: This was a retrospective case-control study. Setting: The Cleft Care Center and outpatient clinic that are affiliated to our faculty were the settings for the study. Participants: A total of 58 CBCT scans were selected of preadolescent individuals: 14 BCLP, 20 UCLP, and 24 age- and gender-matched noncleft controls. Variables: Variables were volume, cross-sectional area (CSA), midsagittal area (MSA), and dimensions of OPA. Statistical analysis: One-way analysis of variance and post hoc tests were used to compare variables. Statistical significance was set at P ≤ .05. Results: UCLP showed significantly smaller superior oropharyngeal airway volume than...

The Cleft Palate-Craniofacial Journal, 2017

Objective To assess the nasopharyngeal airway volume, cross-sectional area, and depth in previous... more Objective To assess the nasopharyngeal airway volume, cross-sectional area, and depth in previously repaired nonsyndromic unilateral cleft lip and palate versus bilateral cleft lip and palate patients compared with noncleft controls using cone-beam computed tomography with the ultimate goal of finding whether cleft lip and palate patients are more liable to nasopharyngeal airway obstruction. Design A retrospective analysis comparing bilateral cleft lip and palate, unilateral cleft lip and palate, and control subjects. Significance at P ≤ .05. Setting Cleft Care Center and the outpatient clinic that are both affiliated with our faculty. Participants Cone-beam computed tomography data were selected of 58 individuals aged 9 to 12 years: 14 with bilateral cleft lip and palate and 20 with unilateral cleft lip and palate as well as 24 age- and gender-matched noncleft controls. Variables Volume, depth, and cross-sectional area of nasopharyngeal airway were measured. Results Patients with b...

Journal of Indian Academy of Oral Medicine and Radiology, 2020

Objectives: The purpose of this study was to determine the value of mandibular morphometric measu... more Objectives: The purpose of this study was to determine the value of mandibular morphometric measurements in sex assessment using digital panoramic radiographs in a sample of dentate Egyptian patients. Methods: A total of 200 digital panoramic radiographs (i.e.,100 males, 100 females) with age ranges between 20 and 60 years were selected. The samples were divided into 4 age groups with 10 years intervals. Maximum ramus width, minimum ramus width, condylar length, coronoid length, ramus length, gonial angle, ramus notch depth, bigonial width, horizontal length, and diagonal length were measured digitally for each subject. A comparison between different sex groups and age ranges was carried out and the mean values were calculated. Results: Mean results for minimum ramus width, condylar length, coronoid length, and ramus length were statistically significant for gender differences (P < 0.05).The mean of all measurements, except for gonial angle, ramus notch depth, and horizontal length, in males, was higher than that of females. Conclusions: Mandibular morphometric measurements assessed using panoramic radiographs can be used for sex assessment when compared to a known population standard.