ORIGINAL_ARTICLE
EFFECT OF DENTAL BLEACHING DURING ORTHODONTIC TREATMENT ON SURFACE ROUGHNESS OF AESTHETIC BRACKETS: AN ESEM STUDY
Introduction: Fixed orthodontic appliances usually provide a shelter for plaque and stain deposition on teeth, stimulating patients to seek teeth bleaching before finishing their orthodontic treatment course. The influence of the whitening agents on the bonded brackets has not been investigated yet. Aim of the study: The current study was conducted to investigate the effect of bleaching techniques on surface roughness of three different types of esthetic orthodontic brackets. Materials and methods: Forty five healthy premolars were selected and classified into 3 groups according to the technique of bleaching. Group A was the control un-bleached group, while groups B and C were either subjected to “in-office” or “at-home” bleaching, respectively. For each group, 3 types of brackets were tested; Transcend ® (polycrystalline ceramic), Inspire Ice® (Monocrystalline ceramic) and Spirit ® (Resin bracket). Brackets were bonded and bleached according to manufacturers’ instructions and surface roughness was evaluated using environmental scanning electron microscope (ESEM). For statistical analysis, ANOVA and LSD tests were used. Results: Brackets subjected to at-home bleaching showed lower Ra values than those subjected to in-office bleaching. Ice ® brackets showed the lowest Ra values, in comparison to the other tested types of brackets. Conclusion: At- home bleaching had lower roughening effect on orthodontic brackets, as compared to in-office technique. Ice brackets were most resistant to the roughening effect of the investigated bleaching agents.
https://edj.journals.ekb.eg/article_71937_60ee7742402fdc79b0aa7f7f48ff5d4f.pdf
2019-04-01
849
856
10.21608/edj.2015.71937
bleaching
Brackets
surface roughnes
Ashraf
Ali
1
Lecturer, Department of Orthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
AUTHOR
Marwa
Tawfik
marwaali.t.g@gmail.com
2
Lecturer, Department of operative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
AUTHOR
Enas
Enan
3
Associate professor, Department of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
AUTHOR
ORIGINAL_ARTICLE
Use of Removable Orthodontic Appliance: Does it influence The Salivary Components?
Introduction: Saliva plays a key role in the oral cavity health. It contains many defense elements and is considered a cornerstone in the oral metabolism. Objective: The aim of this study was to investigate the changes in the salivary concentrations of calcium, glucose, total protein, lactate dehydrogenase and alkaline phosphatase in patients undergoing removable orthodontic appliances treatment. Methods: Ninety saliva samples were collected from thirty subjects ranging in age from 8 to 11 years. An initial sample was attained before starting treatment with removable orthodontic appliances; a second sample 1 month after treatment and a third sample was obtained three months following treatment. The saliva was collected from each patient in pre-labeled sterile containers using the passive drool method. Results: Salivary lactate dehydrogenase and alkaline phosphatase concentrations were significantly increased in patients undergoing removable orthodontic treatment after as compared to before treatment. There was also an increase in the calcium, glucose and total protein concentrations but the differences were insignificant. Conclusion: Removable orthodontic treatment changes the oral fluid contents, promotes an increase in the levels of salivary lactate dehydrogenase and alkaline phosphatase enzymes after one month of treatment with increased values after three months. These oral changes emphasize the importance of maintaining proper oral hygiene measures during treatment.
https://edj.journals.ekb.eg/article_71952_d1f10e67726b89dbb064421289fc98b0.pdf
2019-04-01
857
864
10.21608/edj.2015.71952
saliva
Interceptive orthodontics
Salivary proteins and peptides
Marwa
Shamaa
1
Lecturer of Orthodontics, Faculty of Dentistry, Mansoura University.
AUTHOR
Mostafa
Mansour
2
Lecturer of Clinical Pathology, Faculty of Medicine, Mansoura University.
AUTHOR
ORIGINAL_ARTICLE
Effect of baking soda solution on saliva properties in a group of children: A Randomized control trial
Aim: To measure the effect of baking soda oral rinse on saliva properties of active caries and caries free childrenMethods: This is a randomized controlled clinical study with a sample of 96 children with mean age 10.4 years old selected and divided into two main groups; group (1) include 48 children with active caries and group (2) include 48 caries free children. Saliva samples were taken at baseline and after drinking sugary juice then all children were further divided randomly from each group into two subgroups. Group A: (test) include 24 children rinsed using Baking Soda 2% and Group B: (control) include 24 children rinsed using distilled water. Flow rate, pH and buffer capacity of saliva samples were measured after rinsing with distilled water or BS. The group comparison was done using Student’s t-test. A value of PResults: After rinsing with BS the pH, flow rate and buffer capacity of saliva were increased than rinsing with distilled water in both caries free and caries active children.Conclusion: BS 2% solution enhances the pH, flow rate and buffer capacity of saliva compared to distilled water if rinsed directly after a significant drop in saliva properties followed by sugar consumption.
https://edj.journals.ekb.eg/article_71962_2c916d1b4c9b135b6c56999423eb66e9.pdf
2019-04-01
865
874
10.21608/edj.2015.71962
Baking soda
saliva
children
Yasser
Souror
1
Lecturer of Pediatric Dentistry and Dental Public Health, Faculty of Dental Medicine, Al-Azhar University Assiut Branch Egypt
AUTHOR
Yousef
Abo Khlifa
2
Lecturer of Pediatric Dentistry and Dental Public Health, Faculty of Dental Medicine, Al-Azhar University Cairo. Egypt
AUTHOR
ORIGINAL_ARTICLE
Correlation between ABO Blood Groups and Malocclusion in a sample of Egyptian Populations: A cross sectional study
Background: The authors sought to investigate. the relationship between the blood groups and malocclusion in group from the Egyptian population. Methods: A total of 300 students (172 females and 128 males) in the age ranges of 17 – 22 years participated in this study. A separate sheet was used as a record for each student providing complete information about their blood group type and malocclusion. The blood group of each student was first determined and then divided into four groups according to their ABO blood group into A, B, O and AB group. Inside each group we started to diagnose their type of occlusion, the presence or absence of any malocclusion followed by classifying this malocclusion. Results: Using Chi-square (x2) test with significance level was set at P ≤ 0.05, it was found that a correlation exists between the blood group and malocclusion indicating that the prevalence of malocclusions is highest in blood group A followed by O then B and the least prevalence in AB. Conclusions: The estimation of the correlation between blood groups and malocclusions showed that blood groups have an association with malocclusions with highest prevalence in blood group A followed by O, B and AB in group of Egyptian population.
https://edj.journals.ekb.eg/article_71982_4f3553cd8aa809e4455115408b5801aa.pdf
2019-04-01
875
880
10.21608/edj.2015.71982
Adel
Rashid
1
Lecturer, Department of Orthodontics, Faculty of Dentistry, Fayoum University, Egypt.
AUTHOR
Hanem
El Feky
2
Lecturer, Department of Orthodontics, Faculty of Dentistry, Fayoum University, Egypt.
AUTHOR
ORIGINAL_ARTICLE
Apical root resorption in patients treated with en-masse retraction using skeletal anchorage system versus conventional method
Purpose: To compare external apical root resorption EARR in orthodontic patients treated with en-masse retraction with skeletal anchorage (miniscrews) versus two step procedures. Patients and methods: Forty patients were randomly divided into two equal groups. Group I consisted of 20 patients were treated by using mini-screw anchorage and en-masse retraction, while, group II, 20 patients were treated with two-step retraction and conventional methods of anchorage reinforcement. Lateral cephalometric and digital panoramic radiographs were used to evaluate treatment changes just before (T1) and immediately after (T2) retraction of the maxillary anterior teeth. Results: A significant positive correlation between age and root resorption. Shorter treatment duration was needed in group I with insignificant difference between both groups. Significant root resorption in maxillary central, lateral incisors, canines and first molars was found in both groups just after retraction. A significant root resorption was found for maxillary centrals and first molars in mini-implant group compared to conventional anchorage group. Upper first molars were intruded (-1.8 mm, P=0.041) in mini-implant group with no significant distalization (P=0.016) compared to conventional anchorage group. Upper incisors were significantly retracted (-7.8mm, P=0.001) and intruded (-2.3mm, P=0.017) in comparison to other group. Conclusion: Skeletal anchorage system tends to permit more root resorption than conventional anchorage procedure. A significant retraction and intrusion of maxillary incisors, and a significant intrusion and lack of distalization of maxillary first molars by using skeletal anchorage system during en-masse retraction was found when compared with conventional anchorage procedure.
https://edj.journals.ekb.eg/article_71983_9a2dbaee2472c65757b861d86290c04f.pdf
2019-04-01
881
894
10.21608/edj.2015.71983
Apical root resorption
en-masse retraction
Nahla
Gomaa
1
Assisstant professor of Orthodontics, Faculty of dentistry, Tanta University, Egypt.
AUTHOR
Shaimaa
Elmarhoumy
2
Lecturer of Orthodontics, Faculty of dentistry, Tanta University, Egypt.
AUTHOR
ORIGINAL_ARTICLE
Comparison of actual and predicted tooth widths of canines and bicuspids using the bucco-lingual width method in Angle class I cases
Objectives: To determine the validity of predicting the combined widths of permanent canines and bicuspids from the bucco-lingual widths of the first permanent molars according to Aboul-Azm and Fouda method in Angle class I cases. Material and Methods: Comparison was done between actual and predicted values of permanent canines and caspids from 22 dental casts. The casts represented Angle class I crowded anterior teeth. The casts related to female patients of age range 14- 16 years. Results: Only upper left side showed significant difference with Angle class I cases. Conclusion: This method is reliable by 75 % to Abou Elazm and Fouda method in prediction of the tooth size material in Angle class I cases.
https://edj.journals.ekb.eg/article_71984_6be6c51789f6af3625ff55a8c5cc80be.pdf
2019-04-01
895
898
10.21608/edj.2015.71984
Ahmed
Fouda
1
Lecturer of Orthodontics، Faculty of Dentistry-Mansoura University
AUTHOR
ORIGINAL_ARTICLE
Comparison between Class II Division 1 and 2 Malocclusions and Normal Occlusion regarding Tooth Size Discrepancy and Arch Dimensions using Digital Models
The orthodontists grant a considerable importance to dental arch dimensions to attain more stability of the dentition and better esthetics. The aim of this study was to measure tooth size disharmony and dental arch dimensions in both divisions of class II malocclusion and compare them to Normal occlusion as a control group using three dimensional digital models obtained from 3Shape E1 laser scanner (3Shape, Copenhagen, Denmark). This work was performed on 120 dental casts randomly selected from the records of patients (age range 16- 22 years) attending the Department of Orthodontics, Faculty of Dentistry, Mansoura University. Various parameters were measured including anterior and overall Bolton ratios, maxillary and mandibular intercanine, interfirst premolar and intermolar widths, maxillary and mandibular arch depth, palatal depth, depth of curve of Spee, overjet and overbite. Mean and standard deviation were calculated. One-way ANOVA was used to detect possible differences between groups. The findings indicate that Class II division 1 malocclusion showed significantly greater maxillary arch depth, palatal depth, mandibular intercanine, interpremolar and intermolar widths and larger overjet amount in comparison with Class II division 2, while revealed significantly higher values of maxillary arch depth, mandibular intermolar width, curve of Spee, overjet and overbite than Normal Class I. On the other hand Class II division 2 malocclusion had significantly greater overall Bolton ratio, maxillary intermolar width, curve of spee depth and overbite than Class II division 1, while it showed deeper curve of Spee and larger amount of overjet and overbite compared to Normal Class I. The results of the current study can help the clinicians in treatment planning and provide guidance for proper selection of arch wires to obtain post-treatment stability.
https://edj.journals.ekb.eg/article_71985_9b524cdd8fd581c75ddbdfaac9936a0a.pdf
2019-04-01
899
908
10.21608/edj.2015.71985
Class II malocclusion
Tooth size discrepancy
arch dimensions
dental models
Marwa
Shamaa
1
Lecturer of Orthodontics, Faculty of Dentistry, Mansoura University.
AUTHOR
ORIGINAL_ARTICLE
Prevalence and severity of Molar Incisor Hypomineralization in School Children of Suez Canal Region: Cross-Sectional Study
Objective: To investigate the prevalence and severity of molar incisor hypomineralization (MIH) in a group of school children aged 8-12 years in Suez Canal sector cities. Subjects and Methods: A sample of 1312 students aged 8-12 years were selected from governmental schools in Ismailia, Port Said, and Suez cities. MIH was diagnosed clinically based on the diagnostic criteria established by the European Academy of Pediatric Dentistry (EAPD) 2003. Results and conclusion: The prevalence of MIH varied widely among the 3 cities, with an average of 9.98 %.The severity of MIH was higher in girls 32.14% than boys 5.33%. The most prevalent defect reported in this study was opacities.
https://edj.journals.ekb.eg/article_71986_85164cb6198a1c5c558ac16a049c2e5b.pdf
2019-04-01
909
915
10.21608/edj.2015.71986
Asmaa
Abo ElSoud
1
Lecturer of Pediatric and Preventive Dentistry and Dental Public Health, Faculty of Dentistry, Suez Canal University.
AUTHOR
Shaimaa
Mahfouz
2
Lecturer of Pediatric and Preventive Dentistry and Dental Public Health, Faculty of Dentistry, Suez Canal University.
AUTHOR
ORIGINAL_ARTICLE
Oral health beliefs, knowledge, and behavioral attitudes of Egyptian mothers resident in Giza city towards early childhood caries
Objective: The objective of this study is the evaluation of the oral health beliefs, knowledge and behavior related to the early childhood caries and the barriers may be facing mothers to obtain proper health care in a sample representing Egyptian mothers living in Giza city.Methods: A cross sectional questionnaire based study was carried out including 440 mothers who do have a child with age of 6 years or younger. This questionnaire was designed to evaluate the participant characteristics and to assess their oral health beliefs and knowledge score (22 questions) and oral health behavior score (10 questions), the scores were calculated by summing the correctly answered questions. And also to determine the possible barriers to obtain proper oral health care (7 questions). Results: The analysis of the data did reveal that 48.4% of the participants answered 16 to 22 questions correctly in the oral health beliefs and knowledge sector, while 49.3% of the participant answered 4-6 questions correctly in the oral health behavior sector, while the answers in the barrier section did reveal that 94.3% of the participants were facing 3 to 7 barriers to obtain oral health care. The oral health beliefs and knowledge showed a statistically significant positive correlation with oral health behavior and the barriers to obtain proper oral health care (P value = 0.000).Conclusion: Although the participants were confronted with some barriers to reach proper oral health care, they revealed an internal proper oral health knowledge associated with accepted oral health behavior.
https://edj.journals.ekb.eg/article_71987_3b540f9d74655fc747db08a944b81f94.pdf
2019-04-01
917
926
10.21608/edj.2015.71987
Questionnaire
preschool children
primary teeth
oral health
Naglaa
Soliman
1
Lecturer of Pediatric Dentistry Department, Faculty of Dentistry, October University of Modern Sciences and Arts, Cairo, Egypt
AUTHOR
ORIGINAL_ARTICLE
The Most Common 5 Pediatric Oral Lesions in Middle Nile Delta, Egypt
Background: The prevalence studies on common pediatric oral lesions (POLs) are still rare compared with those on dental caries and periodontal diseases. POLs vary among different geographic regions, age, racial and lifestyle of each population. The purpose of this study was to determine the most common 5 POLs referred to 5 different dental and medical branches in Middle Nile Delta, Egypt. Materials and methods: A qualitative study design was used depending on expert opinions on oral lesions in children (aged 0-14 years). A total of 1164 dental and medical staff members, dentists and physicians at the hospitals of Universities and Ministry of Health, and Specialized Medical Centers & hospitals in the Middle Nile Delta region were included. The target population of the study was experts in 5 branches: Pedodontics, Oral Medicine and Periodontology, Oral and Maxillofacial Surgery, Pediatrics, and Dermatology and Venereology. Data were collected using a checklist including the common diseases within the scope of the study and each expert was asked to give percentages for children seen with each disease entity in his/her branch. Data analysis: Data were statistically analyzed using Statistical Package for the Social Sciences version 19. For each disease, the number and percentage were calculated and differences between observation recorded by health care workers in University and Ministry of Health were tested by chi-square test. P values < 0.05 were considered significant. Results: The most common 5 lesions in Middle Nile Delta region were herpes infection (70.1%), candidiasis (69.2%), aphthous ulcer (67.3%), geographic tongue (56.1%), and acute dental abscess (49.7%). According to each branch; in Pedodontics; acute dental abscess (95.5%), pulp polyp (94.5%), parulis (88.6%), herpes infection (82.7%), and acute pericoronitis (82.3%) were recorded. In Oral Medicine and Periodontology; herpes infection (95.5%) was on the top, followed by physiologic pigmentation (83.5%), candidiasis (76.8%), aphthous ulcer (75.0%), and geographic tongue (70.5%), while in Oral and Maxillofacial Surgery; acute dental abscess (68.1%), acute pericoronitis (59.2%), odontoma (55.0%), eruption cyst (49.2%), and hemangioma (46.7%) were recorded. In the Pediatric branch; the top lesion was candidiasis (96.2%), followed by the geographic tongue (79.2%), herpes infection (74.2%), aphthous ulcer (68.7%), and scarlet fever (35.0%). In Dermatology and Venereology; candidiasis (87.0%), herpes infection (74.5%), geographic tongue (72.1%), physiologic pigmentation (70.0%), and chickenpox (66.7%) were the top 5 lesions. Conclusion: In Middle Nile Delta, Egypt; the most common 5 pediatric oral lesions were herpes infection, followed by candidiasis, aphthous ulcer, geographic tongue, and acute dental abscess. The most common 5 lesions in each department; the results of Oral Medicine and Periodontology, Dermatology and Venereology, and Pediatrics were nearly similar but differ in the ranking, however, the Pedodontics and Oral &Maxillofacial Surgery reported different lesions from the others but similar to each in 2 lesions.
https://edj.journals.ekb.eg/article_71988_5e17767257950c26ae832ebd7bccd610.pdf
2019-04-01
927
939
10.21608/edj.2015.71988
oral lesions
children
prevalence
Middle Nile Delta
Egypt
Talat
Beltagy
1
Associate Professor of Pediatric Dentistry, Faculty of Dentistry, Kafrelsheikh University
AUTHOR
Enas
El-Gendy
2
Associate Professor of Oral Medicine and Periodontology, Faculty of Dentistry, Kafrelsheikh University
AUTHOR
Emad
Essa
3
Associate Professor of Oral and Maxillofacial Surgery, Faculty of Dentistry, Tanta University
AUTHOR
Ibrahim
Kabbash
4
Professor of Public Health and Community Medicine, Faculty of Medicine, Tanta University
AUTHOR
ORIGINAL_ARTICLE
Topographic and Structural Enamel Changes after Orthodontic Primer Absence
The Aim: evaluation of changes of enamel topographic, structural and enamel minerals mass percentage (calcium and phosphorus) due to absence of orthodontic primer.Materials and Methods: 20 orthodontic patients were enrolled in this study. All patients as a part of orthodontic treatment planned to extract first premolars. After ethical approval was granted by Research Ethics Committee of faculty of dentistry, Tanta University and written consent from each patient to participate in this study was obtained. The patients divided randomly into, Group (I): 10 patient’s first premolar brackets bonded with light cured orthodontic composite without primer. Group (II): 10 patient’s first premolar brackets bonded with light cured orthodontic composite with primer. Control group: for both groups bonding only first premolar in one side leaving the opposite side unbounded as a control. After 3 months according to the treatment plane the first premolar tooth extracted, brackets carefully removed, teeth sectioned buccolingually, enamel surface topography was scanned with scanning electron microscopy, calcium and phosphorus mass % was measured using scanning electron microscopy –energy dispersive X ray analytical system (SEM-EDX). The obtained data were histologically and statistically analyzed. Results: despite the non-significant statistical difference between group (I) and group (II), or between either groups and control group more enamel defects and lower average calcium and phosphorus mass % in group (I) than in group (II) due to absence of orthodontic primer in the form of enamel erosion, cracks and gaps between enamel rods and enamel surface. Conclusions: orthodontic bonding using composite without primer can resulted in more enamel defects and non-significant decrease in the mean calcium and phosphorous mass percentage.
https://edj.journals.ekb.eg/article_71989_16901a53dc37b4a338e3073d841a300e.pdf
2019-04-01
941
951
10.21608/edj.2015.71989
Enamel structure
Primer
SEM-EDX
calcium and phosphorus mass
Atia
Yousif
1
Associate prof. Department of Orthodontic, Faculty of Dentistry, Tanta University Egypt.
AUTHOR
Amel
Abd Elhamid
2
Associate prof. Department of Oral Biology, Faculty of Dentistry, Tanta University, Egypt
AUTHOR
ORIGINAL_ARTICLE
Prevalence of the oral habits that cause anterior open-bite in Egyptian pre-adolescents (Cross-sectional study)
The oral habits were claimed to be among the most causative factors of anterior open-bite (AOB). As AOB is being one of the most difficult cases to orthodontically treat, the proper identification of etiology is important to treat or even prevent the occurrence of the malocclusion. Hence the aim of the study was to identify the oral habits prevalence causing the anterior open-bite. 829 malocclusion preadolescents of both sexes were diagnosed, out of which the percentage of anterior open bite was recorded, as well as, the accompanying oral habits and the data were then statistically analyzed. Out of those patients, 20.9% had AOB. The highest prevalence of habit was the tongue thrust, followed by thumb sucking, mouth breathing and least was lip biting. Some cases showed more than one habit.
https://edj.journals.ekb.eg/article_71990_af24d548e93d11c896aeaa3b4e28698e.pdf
2019-04-01
953
958
10.21608/edj.2015.71990
Eman
El-Sayed
1
Lecturer at the Orthodontic Department, Faculty of Dentistry, Cairo University.
AUTHOR
Amany
Abdel Ghani
2
Assistant Professor at the Orthodontic Department, Faculty of Dentistry, Cairo University.
AUTHOR
ORIGINAL_ARTICLE
Evaluation of Modified Glass Ionomer Cements with Protein repellent and Nanostructured Antibacterial Properties in Prevention of Enamel Demineralization. An in vivo study
Objectives: To evaluate the in vivo effect of Titanium dioxide (TiO2) nanoparticles and methacryloyloxyethyl phosphoryl choline (MPC) polymer modifications of glass-ionomer cement, to inhibit demineralization around orthodontic bands. Materials and Methods: 60 orthodontic patients with non-carious molars scheduled for banding were randomly divided into three groups. Grouping was based on (3% MPC, 3% nano-Titanium, and 3%+3% of both by weight) added to the luting glass-ionomer cement (GIC) Medicem, which was used for cementation of prefabricated micro-etched orthodontic bands. Demineralization was recorded by using DiagnoDent pen (KaVo, Biberach, Germany) device. Statistical evaluation was performed with one way ANOA test. Results: Bands cemented with conventional GIC showed the highest bacterial scores in comparison to those cemented with MPC polymer and nano-titanium modified GICs. There was significant difference between teeth banded with 3% MPC, 3% nano-titanium, and 3% MPC + 3% nano-titanium modified GICs. Conclusions: Modification of the banding GIC with MPC polymer and nano-titanium revealed a positive effect on reducing white spots around orthodontic bands.
https://edj.journals.ekb.eg/article_71991_099a84bc99b065574f8752e144e0bc9e.pdf
2019-04-01
959
964
10.21608/edj.2015.71991
MPC
Nano-titanium
WSLs
Diagnodent pen
orthodontic
Marwa
Tawfik
marwaali.t.g@gmail.com
1
Lecturer of Orthodontics, Faculty of Dentistry, Mansoura University.
AUTHOR
Rabab
Mehesen
2
Lecturer of Operative Dentistry, Faculty of Dentistry, Mansoura University.
AUTHOR
Tayseer
Maaly
tayseermaaly@yahoo.com
3
Lecturer of Dental Biomaterials, Faculty of Dentistry, Zagazig University
AUTHOR
ORIGINAL_ARTICLE
Prevalence of Malocclusion using Angle classification within The Dental Students of Fayoum University, Egypt (A Survey Study)
Subjects : The sample of this study consisted of 1000 students (580 female and 420 male) studying in the Faculty of Dentistry, Fayoum University, Fayoum government , Egypt. The age ranged from 18 to 23 years old.Methods : All students should fulfill the following criteria : Having full permanent dentition without any missing teeth nor previous orthodontic treatment was the main inclusion criteria. The occlusion was assessed when the patients were guided to occlude in centric occlusion. All students were examined clinically on the dental chairs by single orthodontist. The collected data was statistically analyzed. Statistical analysis was performed with IBM® SPSS® Statistics Version 20 for Windows.Results : The results of the study revealed that 30.1% of the sample had normal occlusion and 69.9% had malocclusion. Class I malocclusion was found in 33.1% of the subjects , followed by Class II malocclusion in 20.2% and finally Class III malocclusion in 16.6% of .Conclusion : Angle malocclusion was found to be in 69.9% of sample. Class I malocclusion was of highest percentage followed by Class II malocclusion and finally Class III malocclusion .
https://edj.journals.ekb.eg/article_71992_8453e262df9be0ca759aa32b585e0548.pdf
2019-04-01
965
969
10.21608/edj.2015.71992
Adel
Rashid
1
Lecturer of Orthodontics, Faculty of Dentistry, Fayoum University, Egypt.
AUTHOR
Hanem
El Feky
2
Lecturer of Orthodontics, Faculty of Dentistry, Fayoum University, Egypt.
AUTHOR
ORIGINAL_ARTICLE
Increased buccolingual dimension of maxillary second premolar bracket : Is it necessary ?
Introduction : Small-sized maxillary second premolars pose a challenge for the orthodontist with regards to alignment of the contact point with the maxillary first molar. To overcome this discrepancy, Dentaurum Discovery Smart brackets have been developed with thicker buccopalatal dimension. Aim of the study : The aim of this study was to compare between two bracket systems (Dentaurum Discovery Smart) and conventional (American Orthodontics/Ormco) brackets regarding the effect of differential in-out buccopalatal thickness on the alignment of the contact points of maxillary premolars and molars as well as bond failure rate. Materials and Methods : This prospective study consisted of 24 patients with an age range of 20-30 years old and a mean age of 24.5 years selected from a private practice in Cairo, Egypt. The patients had full permanent dentition and were non-syndromic with no previous orthodontic treatment. At least one maxillary second premolar had a reduced buccopalatal dimension. The patients were randomly divided into two groups, each group containing 12 patients. Group 1 were treated with Discovery smart Dentaurum brackets and Group 2 were treated with American Orthodontics /Ormco mini diamond brackets. Treatment was continued with fixed appliances for 2 years until rectangular stainless steel wires were reached. Results : There was a statistically significant difference between Group 1 and Group 2 regarding proximal contact point discrepancy (P<0.05) with 50% of Group 2 having at least 0.5 mm buccal contact point discrepancy between upper second premolar and upper permanent first molar. No contact point discrepancy was observed for Group 1 (0%). However bond failure rate was significantly higher in Group 1 (80%) compared to (20%) in Group 2. Conclusions : The Dentaurum Discovery Smart brackets are highly effective in achieving adequate buccopalatal alignment of small sized maxillary second premolars with maxillary first premolars and permanent first molars. However they have the drawback of frequent bond failures due to their thicker buccopalatal dimension.
https://edj.journals.ekb.eg/article_71993_834843f858b22bf4252e87051e839ce5.pdf
2019-04-01
971
977
10.21608/edj.2015.71993
Fady
Fahim
1
Lecturers of Orthodontics, Faculty of Dentistry, Cairo University
AUTHOR
Dina
ElAbbasy
2
Lecturers of Orthodontics, Faculty of Dentistry, Cairo University
AUTHOR
ORIGINAL_ARTICLE
Palatally displaced maxillary lateral incisors maybe a causative factor of mandibular deficiency
Introduction: Several factors play a role in the etiology of skeletal Class II malocclusion. Displaced maxillary incisors might have a hindering effect on mandibular growth potential. Aim of the study: The aim of this cross-sectional study was to evaluate the influence of palatally displaced maxillary incisors on mandibular growth in a group of Egyptian patients. Subjects and Methods: The sample consisted of the digital lateral cephalometric radiographs of untreated 24 patients (12 females and 12 males) with age range of 15-30 years and a mean age of 22.4 years during the permanent dentition stage. The radiographs were selected from the patient database of private practice in Cairo. The sample was divided into 2 groups each consisting of 12 patients. Group A had palatally displaced maxillary lateral incisors without crossbite. Group B had palatally displaced maxillary lateral incisors with crossbite. Linear and angular cephalometric measurements (ANB & Witts appraisal) were used to assess the anteroposterior skeletal malocclusion and the position of the apical bases of the jaws in both groups. Independent samples t-test was performed to compare the results between the two groups. Results: Cephalometric measurements revealed statistically significant differences between groups A and B showing a mild skeletal Class II malocclusion with a retrognathic mandible in Group A (mean ANB = 4.4˚ ± 1.85), (mean Witts= 1.85 mm ± 3.22) while Group B had skeletal Class I pattern with mild skeletal Class III tendency (mean ANB= 0.8˚± 1.88), (mean Witts=-2.5mm ± 2.33). Conclusions: Palatally displaced maxillary lateral incisors without crossbite cause restraining effect on normal mandibular growth which results in mild skeletal Class II with mandibular deficiency. However, palatally displaced maxillary lateral incisors that are in crossbite have no restraining effect on mandibular growth which results in normal to slightly excessive mandibular growth. This can be used as a tool for early prediction of mandibular growth pattern that necessitates immediate intervention.
https://edj.journals.ekb.eg/article_71994_8be9d822cbc28782bc02d13bef672144.pdf
2019-04-01
979
987
10.21608/edj.2015.71994
Fady
Fahim
1
Lecturers of Orthodontics, Faculty of Dentistry, Cairo University
AUTHOR
Dina
ElAbbasy
2
Lecturers of Orthodontics, Faculty of Dentistry, Cairo University
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