Egyptian Orthodontic Journal最新文献_第5页

Prevalence of malocclusion and common occlusal traits among adolescent school children in Dakahliya, Egypt and Makkah, Saudi Arabia (A comparative study) 埃及Dakahliya和沙特阿拉伯Makkah青少年学龄儿童错颌患病率及共同咬合特征的比较研究

Egyptian Orthodontic Journal Pub Date : 2020-07-28 DOI: 10.21608/eos.2020.105562

H. El-Attar, Rabab I Salama, Aya Hussien

{"title":"Prevalence of malocclusion and common occlusal traits among adolescent school children in Dakahliya, Egypt and Makkah, Saudi Arabia (A comparative study)","authors":"H. El-Attar, Rabab I Salama, Aya Hussien","doi":"10.21608/eos.2020.105562","DOIUrl":"https://doi.org/10.21608/eos.2020.105562","url":null,"abstract":"The aim of this study was to assess the prevalence of malocclusion among adolescent school students in Dakahliya Governorate, Egypt and compare it to a similar group in Makkah Saudi Arabia. Furthermore, explore the possibility of the presence of significant difference between different population for the various occlusal traits assessed. \u0000Materials and Methods: Descriptive study with stratified cluster random sample of 627 male adolescents, with age range (14-17) years, selected from 21 schools in the Dakahliya Governorate, Egypt and Makkah, Saudi Arabia to assess and compare the status of occlusion. Occlusal traits assessed were; malocclusion types, crowding, diastema, cross bite, overjet and overbite.Results and Conclusion: This study revealed predominance of Angle Class I (67.1% in Saudis, 65.4% Egyptians), followed by Class II (div1) (14.5%, 18.6%), then Class II (div2) (10.7%, 8.6%). Class III showed the least prevalence (7.6%, 7.4%) for Saudis and Egyptians respectively. The most prevalent malocclusion trait was crowding (63.3% in Saudis,57.7% in Egyptians). Increased overjet was higher among Egyptians. Decreased overjet was higher among Saudis. Increased overbite was more prevalent in Egyptians while decreased overbite was more prevalent in Saudis. Anterior and posterior crossbite showed more prevalence among Saudi adolescents. where diastema was more prevalent among Egyptians. Statistically significant difference was found between Saudi and Egyptian male adolescents in all the studied occlusal traits.","PeriodicalId":305086,"journal":{"name":"Egyptian Orthodontic Journal","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124669180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Evaluation of the shear bond strength of ceramic orthodontic brackets to glazed monolithic zirconia using different bonding protocols 不同粘结方式下陶瓷正畸托槽与釉面整体氧化锆的剪切粘结强度评价

Egyptian Orthodontic Journal Pub Date : 2019-12-01 DOI: 10.21608/eos.2019.77627

Youmna Douara, Sally Abdul Kader, Hassan E Kassem, Mohamed I. Mowafy

{"title":"Evaluation of the shear bond strength of ceramic orthodontic brackets to glazed monolithic zirconia using different bonding protocols","authors":"Youmna Douara, Sally Abdul Kader, Hassan E Kassem, Mohamed I. Mowafy","doi":"10.21608/eos.2019.77627","DOIUrl":"https://doi.org/10.21608/eos.2019.77627","url":null,"abstract":"AbstractAIM: The aim of this study was to evaluate the shear bond strength (SBS) of ceramic brackets to glazed monolithic zirconia using three different bonding protocols.MATERIALS AND METHODS: Forty-five monolithic glazed zirconia embedded into acrylic resin were randomly assigned to 3 groups (n = 15) following air abrasion by 50 μm aluminum oxide particles, the groups were treated with: (A) Assure Plus, (B) Silane + Assure Plus (C) Hydrofluoric acid + Silane + Transbond XT primer. Ceramic brackets were bonded to the zirconia discs using Transbond XT. Following thermocycling (500 cycles, 5° - 55° C), SBS, failure mode and Adhesive Remnant Index were assessed.RESULTS:Group C showed the highest SBS followed by Group B with no statistically significant difference. Most of the specimens in Group C showed an adhesive failure between the bracket base and the adhesive, whereas Group B presented mainly a mixed cohesive adhesive failure. SBS in Group A was significantly lower than either groups showing an adhesive failure at the zirconia- adhesive interface.CONCLUSIONS: Both Assure Plus + Silane and the classical ceramic bonding protocol achieved clinically acceptable SBS of ceramic brackets bonded to glazed zirconia. However, Assure Plus + Silane achieved better debonding characteristics.","PeriodicalId":305086,"journal":{"name":"Egyptian Orthodontic Journal","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117185145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Morphological features of dentition associated with unilateral palatally impacted canine using cone beam computed tomograpahy: an etiological study 锥形束计算机断层扫描与单侧腭阻生犬牙列的形态学特征:一项病因学研究

Egyptian Orthodontic Journal Pub Date : 2019-06-01 DOI: 10.21608/eos.2019.77127

O. Okasha, Essam M. Abdallah, T. Yousry

{"title":"Morphological features of dentition associated with unilateral palatally impacted canine using cone beam computed tomograpahy: an etiological study","authors":"O. Okasha, Essam M. Abdallah, T. Yousry","doi":"10.21608/eos.2019.77127","DOIUrl":"https://doi.org/10.21608/eos.2019.77127","url":null,"abstract":"Introduction: the aim of this study is to determine the morphological features of dentition associated with unilateral palatally impacted maxillary canine and to predict of the possible local risk factors causing palatal impaction of the maxillary canine. Materials and Methods: 45 cone beam computer tomography were collected of patients diagnosed with unilateral palatally impacted canines 11 males and 34 females the mean age was 20.38 ± 4.37. The maxilla was divided into two for a split mouth design.The following parameters were obtained: The mesiodistal width of each tooth, the crown /root ratio of each tooth, and the volume of the impacted canine compared to the contralateral normally erupting canine, angulation and morphology of the root, Interpremolar and intermolar width of the upper arch and the arch perimeter.The measures were compared between the 2 sides. The data obtained in this study was subjected to Kolmogorov-Smirnov test, McNemar test and Paired t-test at P ≤0.05. Results: The results showed larger canine volume, narrower interpremolar width and increased crown root ratio of the laterals and canines on the impacted side. There was no statistically significant difference between two sides in the rest of the measurements. Conclusion: Narrower interpremolar width, increased canine volume, shorter root of lateral incisor and increased length of canine crown are contributing factors for impaction of the canine.","PeriodicalId":305086,"journal":{"name":"Egyptian Orthodontic Journal","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128169908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect Of changing various parameters on stress distribution in mini-screws and surrounding alveolar bone: a three dimensional finite element analysis 改变各种参数对微型螺钉及其周围牙槽骨应力分布的影响:三维有限元分析

Egyptian Orthodontic Journal Pub Date : 2019-06-01 DOI: 10.21608/eos.2019.76617

A. Sadek, I. Negm, Khaled Aboulazm

引用次数: 0

Different types of malocclusion and oral habits in Sharja and Ajman Emirates 沙迦和阿治曼酋长国不同类型的错颌和口腔习惯

Egyptian Orthodontic Journal Pub Date : 2019-06-01 DOI: 10.21608/eos.2019.77126

Hanaa Elattar, Omnia A. Elhiny, May El Janahi

{"title":"Different types of malocclusion and oral habits in Sharja and Ajman Emirates","authors":"Hanaa Elattar, Omnia A. Elhiny, May El Janahi","doi":"10.21608/eos.2019.77126","DOIUrl":"https://doi.org/10.21608/eos.2019.77126","url":null,"abstract":"Aim: to determine the prevalence of malocclusion among adults attending Dental Centers in Ajman and Sharjah, as well as the association of gender, ethnicity, and prevalent oral habits with the types of malocclusion. Material and Methods: The study was conducted on 300 patients with age range 18-30 years. Intraoral dental and Orthodontic classification was performed alongside a questionnaire. Patients’ occlusions were classified based on Angle’s Classification. Results: Among the sample group, it was found that Class I malocclusion was the most prevalent malocclusion with 74% , Class II division 1 was 12% and Class II division 2 was 11% and the least was Class III with 3% with significant difference between males and females. For different ethnic groups included in the study the same pattern of prevalence applied (Class I followed by Class II, Class III came last) except for Caucasians and Far Eastern, where Class II division 2 surpassed division 1 with a significant difference between all Classes of malocclusion except for Class I. As for oral habits, nail biting was the most prevalent oral habit showing 20.7%, followed by teeth grinding 11%, thumb sucking 10%. Tongue Thrust was the least prevalent habit with a significantly higher prevalence in Class II malocclusion of the studied sample. CONCLUSION: Class I malocclusion was the most prevalent malocclusion, followed by Class II division 1, Class II division 2, and the least was Class III. All ethnic groups showed the same pattern of distribution except for Caucasians, Far Eastern, and South Asian. The pattern of distribution was the same for both males and females; however, a difference in the percentage existed between genders. The most prevalent oral habit was nail biting. All oral habits were not related to different types of malocclusions except for tongue thrust (higher prevalence in Class II Malocclusion). This study is a base for further Arab and Middle Eastern studies.","PeriodicalId":305086,"journal":{"name":"Egyptian Orthodontic Journal","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121137035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cephalometric features of Angle class III malocclusion with different dentoalveolar compensation (retrospective study) 不同牙槽代偿的Angle III类错牙合的头颅测量特征(回顾性研究)

Egyptian Orthodontic Journal Pub Date : 2019-06-01 DOI: 10.21608/eos.2019.77125

Dina Elfouly, E. Marzouk, Hanan A. Ismail

{"title":"Cephalometric features of Angle class III malocclusion with different dentoalveolar compensation (retrospective study)","authors":"Dina Elfouly, E. Marzouk, Hanan A. Ismail","doi":"10.21608/eos.2019.77125","DOIUrl":"https://doi.org/10.21608/eos.2019.77125","url":null,"abstract":"Introduction: This study was to investigate dentoalveolar compensation in untreated skeletal Class III patients. Methods:This retrospective study was conducted on 102 untreated Class III malocclusion patients. They were divided into group 1 (overjet<0mm, n=51) and group 2 (overjet ≥ 0mm, n=51). Twenty-six cephlometric readings were compared between the two groups. Correlation analysis was performed between the overjet with skeletal and dental measurements and Regression analysis was performed to determine the overjet. Results: The results showed a significantly higher SNB, S-N-Pg, gonial angle and L1-NB mm in the negative overjet group. While, the ANB angle, angle of convexity, Wits appraisal, bony chin and U1- A-Pg mm were significantly higher in the positive overjet group. However, no statistically significant difference was found in the rest of the readings. Correlational analyses showed that the overjet has significant negative correlation with SNB, S-N-Pg, L1-Frankfort, gonialangles. On the other hand, it had significant positivecorrelation with ANB angle, angle of convexity, Wits appraisal, bony chin, L1-MP angle and U1-A-Pg mm. Nine regression equations for the overjet were calculated with the highest coeffcient of determination of 0.33. Conclusion: Dentoalveolar compensation was seen in Class III cases with less skeletal discrepancy, lower mandibular prominence, larger bony chin, greater angle of convexity and smaller gonial angle. Moreover, the position of the maxillary and mandibular incisors on the basal bone, rather than their inclination, contributed in dentoalveolar compensation","PeriodicalId":305086,"journal":{"name":"Egyptian Orthodontic Journal","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122682316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative study of the rate of tooth movement between corticotomy and piezocision to facilitate en masse retraction in bimaxillary protrusion 皮质切开术与压切术对双颌前突患者牙齿移动率的比较研究

Egyptian Orthodontic Journal Pub Date : 2018-12-21 DOI: 10.21608/eos.2018.77157

Rehab G Khalil, W. Abbas, W. Refaat, A. Ramadan

{"title":"Comparative study of the rate of tooth movement between corticotomy and piezocision to facilitate en masse retraction in bimaxillary protrusion","authors":"Rehab G Khalil, W. Abbas, W. Refaat, A. Ramadan","doi":"10.21608/eos.2018.77157","DOIUrl":"https://doi.org/10.21608/eos.2018.77157","url":null,"abstract":"Objective: The aim of this study was to evaluate the rate of orthodontic tooth movement and the time needed for extraction space closure when corticotomy and piezocision were used to facilitate en-masse retraction in bimaxillary protrusion cases. Subjects and Methods: The sample of this study consisted of twenty subjects having Class I malocclusion with bimaxillary protrusion and requiring extraction of four first premolars and en-masse retraction of the anterior segments on both arches. The sample was randomly divided into two equal groups; group I:corticotomy was performed by using piezosurgery through flap reflection and group II: corticotomy was performed by using piezocision (flapless corticotomy). Study models were obtained just before surgery and in every month for 6 months after surgery to measure the rate of orthodontic tooth movement in both groups. After completing the en-masse retraction, the retraction time in months was recorded for the right and left sides and averaged. Results: Group I showed a statistically significant shorter retraction time than group II. Group I showed a statistically significant increase in the rate of tooth movement from the 2nd to the 5th month in the upper arch. For the lower arch, group I exhibited a significant increase in the rate of tooth movement in the 4th month. Conclusion: Corticotomy involving flap reflection showed a shorter retraction time and higher rates of tooth movement than piezocision during en-masse retraction.","PeriodicalId":305086,"journal":{"name":"Egyptian Orthodontic Journal","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116492446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The skeletal effect of two mandibular expander on the mandibular arch: a CBCT comparative study 两种下颌扩张器对下颌弓骨骼影响的CBCT对比研究

Egyptian Orthodontic Journal Pub Date : 2018-12-13 DOI: 10.21608/eos.2018.77147

Saif Alnaser A. Alsullei, Aleem Mohammed, F. Hussein, Abdullah M Agniah

引用次数: 0

Evaluation of bone thickness changes associated with en masse retraction facilitated by corticotomy and piezocision using cone beam computed tomography 使用锥形束计算机断层扫描评估皮质切开术和压切术引起的大面积后缩引起的骨厚度变化

Egyptian Orthodontic Journal Pub Date : 2018-12-10 DOI: 10.21608/eos.2018.77149

Rehab G Khalil, W. Abbas, W. Refaat, A. Ramadan

{"title":"Evaluation of bone thickness changes associated with en masse retraction facilitated by corticotomy and piezocision using cone beam computed tomography","authors":"Rehab G Khalil, W. Abbas, W. Refaat, A. Ramadan","doi":"10.21608/eos.2018.77149","DOIUrl":"https://doi.org/10.21608/eos.2018.77149","url":null,"abstract":"Objective: The purpose of this study was to assess the bone thickness changes accompanied en-masse retraction assisted by corticotomy and piezocision by using CBCT (cone beam computed tomography). Subjects and Methods: Twenty subjects having Class I malocclusion with bimaxillary protrusion were included in the study. The patients were randomly divided into two equal groups; group I: flap group and group II: piezocision group. CBCT images were obtained before treatment (T1) and after space closure (T2). The alveolar bone thickness was assessed on the labial and lingual sides at the cervical, middle and apical thirds of the roots of the upper and lower anteriors. Results: Group I demonstrated a significant increase in the cervical labial bone thickness of the upper incisors while no significant change was detected in group II. Both groups revealed a significant decrease in the bone thickness of the cervical labial third of the lower anteriors. The labial bone thickness of the middle third showed no significant change except the upper left lateral incisor which revealed a significant decrease in group I. The labial bone thickness at the apical third showed no significant change in both groups. For both groups, the lingual bone thickness showed a significant decrease for all anteriors in the cervical and middle thirds. The apical third revealed no significant changes except the canines which showed a significant decrease in group I. Conclusion: En-masse retraction aided with either corticotomy or piezocision in bimaxillary protrusion cases showed significant bone thickness changes on the labial and lingual sides.","PeriodicalId":305086,"journal":{"name":"Egyptian Orthodontic Journal","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114959198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of ultimate tensile strength and surface roughness of NiTi and CuNiTi orthodontic archwires after recycling procedures NiTi和CuNiTi正畸弓丝回收后的极限抗拉强度和表面粗糙度评价

Egyptian Orthodontic Journal Pub Date : 2018-12-08 DOI: 10.21608/eos.2018.77146

Yasmine Sayed, Khaled Aboulazm, A. Fahmy

{"title":"Evaluation of ultimate tensile strength and surface roughness of NiTi and CuNiTi orthodontic archwires after recycling procedures","authors":"Yasmine Sayed, Khaled Aboulazm, A. Fahmy","doi":"10.21608/eos.2018.77146","DOIUrl":"https://doi.org/10.21608/eos.2018.77146","url":null,"abstract":"Aim: The aim of this study is to evaluate and compare the influence of 2 types of sterilization/disinfection procedures on the tensile strength and surface topography of two orthodontic wires (Nickel-titanium (NiTi), and cupper Nickel-titanium (CuNiTi)). Materials and Methods: Sample comprised of 140 wires(100 new 0.017×0.025′′ Ovoid rectangular, and 40 used 0.017×0.025′′ Ovoid rectangular wires). They were randomly divided into 7 groups according to method and number of sterilization cycles,each group equally divided into 2 subgroups according to wire composition. Surface topography was examined with scanning electron microscope (SEM) and ultimate tensile strength (UTS) was tested using universal testing machine after sterilization and disinfection of the experimental groups. Result: SEM images revealed an increase in surface irregularities in CuNiTi and NiTi wires after sterilization. UTS of CuNiTi and NiTi wires after one cycle of autoclave sterilization procedure, or chemical sterilization for one or two cycles were not significantly different when compared with the control group. NiTi and CuNiTi archwires were affected after two cycles of autoclave sterilization.The mean UTS of clinically used and recycled archwires increased significantly when compared with the control group. Used and recycled archwires were affected considerably by autoclave sterilization Conclusion: Autoclave sterilization and chemical sterilization solution can be recommended for sterilization of orthodontic wires for one cycle.","PeriodicalId":305086,"journal":{"name":"Egyptian Orthodontic Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128591628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1