Snigdha Pattanaik, V. Veeraraghavan, A. Dasari, Santosh R. Patil, Saeed G. Alzahrani, Mohammad Fareed
The demand for orthodontic treatment among adults has witnessed a substantial rise in recent years. This study aims to explore the complexities of adult orthodontics, focusing on challenges faced, treatment outcomes, and the influence of factors such as age, gender, and education on patient compliance and satisfaction. A multi-dimensional approach was employed, combining a review of clinical records with structured patient surveys. Descriptive statistics summarized demographic characteristics, treatment duration, and orthodontic problems addressed. Inferential statistics included Pearson correlation, Chi-squared tests, and analysis of variance to examine age compliance, gendersatisfaction, and education-orthodontic problem relationships. Qualitative analysis enriched findings, and statistical software facilitated data processing. The analysis revealed a statistically significant negative correlation between age and compliance (r = -0.28, P < 0.05), indicating that younger participants demonstrated higher compliance rates. Gender emerged as a significant factor influencing patient satisfaction (P = 0.024), with females reporting notably higher levels of satisfaction than males. Furthermore, participants with advanced education levels (Master’s/Ph.D.) were significantly more likely to have orthodontic issues related to malocclusion (P = 0.041). The study provides an insight into the multi-dimensional aspects of adult orthodontics, recognizing the challenges, compliance, and satisfaction levels. Tailored approaches considering age, gender, and education are essential. This research contributes to a deeper understanding of orthodontic treatment in adults and its potential implications for enhanced patient care.
{"title":"Orthodontic treatment in adults: Challenges, outcomes, and factors affecting compliance and satisfaction","authors":"Snigdha Pattanaik, V. Veeraraghavan, A. Dasari, Santosh R. Patil, Saeed G. Alzahrani, Mohammad Fareed","doi":"10.4103/jos.jos_186_23","DOIUrl":"https://doi.org/10.4103/jos.jos_186_23","url":null,"abstract":"\u0000 \u0000 The demand for orthodontic treatment among adults has witnessed a substantial rise in recent years. This study aims to explore the complexities of adult orthodontics, focusing on challenges faced, treatment outcomes, and the influence of factors such as age, gender, and education on patient compliance and satisfaction.\u0000 \u0000 \u0000 \u0000 A multi-dimensional approach was employed, combining a review of clinical records with structured patient surveys. Descriptive statistics summarized demographic characteristics, treatment duration, and orthodontic problems addressed. Inferential statistics included Pearson correlation, Chi-squared tests, and analysis of variance to examine age compliance, gendersatisfaction, and education-orthodontic problem relationships. Qualitative analysis enriched findings, and statistical software facilitated data processing.\u0000 \u0000 \u0000 \u0000 The analysis revealed a statistically significant negative correlation between age and compliance (r = -0.28, P < 0.05), indicating that younger participants demonstrated higher compliance rates. Gender emerged as a significant factor influencing patient satisfaction (P = 0.024), with females reporting notably higher levels of satisfaction than males. Furthermore, participants with advanced education levels (Master’s/Ph.D.) were significantly more likely to have orthodontic issues related to malocclusion (P = 0.041).\u0000 \u0000 \u0000 \u0000 The study provides an insight into the multi-dimensional aspects of adult orthodontics, recognizing the challenges, compliance, and satisfaction levels. Tailored approaches considering age, gender, and education are essential. This research contributes to a deeper understanding of orthodontic treatment in adults and its potential implications for enhanced patient care.\u0000","PeriodicalId":16604,"journal":{"name":"Journal of Orthodontic Science","volume":"28 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141031504","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}
I. Ardani, Intan Vallentien Dwi Hariati, Alexander Patera Nugraha, I. Narmada, Achmad Syaifudin, Ida Bagus Agastya Perkasa, Guruh Putra Gunung, Shailesh Deshmukh, Rozita Hassan
Only miniscrews [temporary anchoring devices, (TADs)] can provide absolute anchorage during orthodontic treatment. Titanium (Ti) is a fundamental material used in the production of miniscrews, but it has many disadvantages. Polyaryletheretherketone (PEEK) may have various benefits in the production of miniscrews. Finite element analysis (FEA) is a valid and reliable method for calculating stress, strain, and loading forces on complex structures and can be more time- and cost-efficient. To investigate the biomechanical performance of Ti and PEEK as miniscrew biomaterials employing FEA. This study is a 3-D (3D) simulation with FEA. First, 3D miniscrew modeling is done using Ti base material and PEEK (1.4 mm × 6 mm size), as well as 3D inter-radicular space bone modeling. The simulation was performed by modeling the insertion angles (30°, 60°, and 90°) and applying a 200-gram loading force. The biomechanical performance of the miniscrew was then determined using FEA. As the angle of insertion increases, the tension on the bone decreases, the stress on the TADs increases, and the bone deformation decreases. Compared to TADs made of Ti and PEEK, TADs made of PEEK alone cause more bone stress than TADs made of Ti. The distortion in the maxilla is observed to be larger than in the mandibular. PEEK has greater stress on the bones than Ti and may be prospected as an alternative biomaterial for TAD fabrication, as documented in the FEA.
只有微型螺钉[临时固定装置（TAD）]才能在正畸治疗期间提供绝对的固定。钛（Ti）是制作微型螺钉的基本材料，但它有许多缺点。聚芳醚醚酮（PEEK）在微型螺钉的生产中可能具有各种优势。有限元分析（FEA）是计算复杂结构的应力、应变和加载力的一种有效而可靠的方法，而且更省时省力。 利用有限元分析研究钛和聚醚醚酮作为微型螺钉生物材料的生物力学性能。 本研究采用有限元分析进行三维（3D）模拟。首先，使用钛基底材料和聚醚醚酮（尺寸为 1.4 毫米 × 6 毫米）进行三维微型螺钉建模，并进行三维关节间隙骨建模。通过模拟插入角度（30°、60° 和 90°）并施加 200 克的加载力进行了模拟。然后使用有限元分析确定了微型螺钉的生物力学性能。 随着插入角度的增大，骨上的张力减小，TADs 上的应力增大，骨变形减小。与由钛和 PEEK 制成的 TAD 相比，仅由 PEEK 制成的 TAD 比由钛制成的 TAD 造成的骨应力更大。据观察，上颌的变形大于下颌。 与钛相比，PEEK 对骨骼的应力更大，因此，正如有限元分析所证实的那样，PEEK 可作为制造 TAD 的替代生物材料。
{"title":"Comparison of biomechanical performance of titanium and polyaryletheretherketone miniscrews at different insertion angles: A finite element analysis","authors":"I. Ardani, Intan Vallentien Dwi Hariati, Alexander Patera Nugraha, I. Narmada, Achmad Syaifudin, Ida Bagus Agastya Perkasa, Guruh Putra Gunung, Shailesh Deshmukh, Rozita Hassan","doi":"10.4103/jos.jos_102_23","DOIUrl":"https://doi.org/10.4103/jos.jos_102_23","url":null,"abstract":"\u0000 \u0000 Only miniscrews [temporary anchoring devices, (TADs)] can provide absolute anchorage during orthodontic treatment. Titanium (Ti) is a fundamental material used in the production of miniscrews, but it has many disadvantages. Polyaryletheretherketone (PEEK) may have various benefits in the production of miniscrews. Finite element analysis (FEA) is a valid and reliable method for calculating stress, strain, and loading forces on complex structures and can be more time- and cost-efficient.\u0000 \u0000 \u0000 \u0000 To investigate the biomechanical performance of Ti and PEEK as miniscrew biomaterials employing FEA.\u0000 \u0000 \u0000 \u0000 This study is a 3-D (3D) simulation with FEA. First, 3D miniscrew modeling is done using Ti base material and PEEK (1.4 mm × 6 mm size), as well as 3D inter-radicular space bone modeling. The simulation was performed by modeling the insertion angles (30°, 60°, and 90°) and applying a 200-gram loading force. The biomechanical performance of the miniscrew was then determined using FEA.\u0000 \u0000 \u0000 \u0000 As the angle of insertion increases, the tension on the bone decreases, the stress on the TADs increases, and the bone deformation decreases. Compared to TADs made of Ti and PEEK, TADs made of PEEK alone cause more bone stress than TADs made of Ti. The distortion in the maxilla is observed to be larger than in the mandibular.\u0000 \u0000 \u0000 \u0000 PEEK has greater stress on the bones than Ti and may be prospected as an alternative biomaterial for TAD fabrication, as documented in the FEA.\u0000","PeriodicalId":16604,"journal":{"name":"Journal of Orthodontic Science","volume":"12 19-20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141054529","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}
Sajal Gupta, Amit Kr. Khera, Pradeep Raghav, A. Wadhawan, Pankaj Wadhwa, Nupur Sharma
To evaluate and compare the displacement pattern of maxillary anterior teeth in the sagittal and vertical planes and evaluate the stress distribution in pdl, bone, teeth of the maxillary anterior region, and around the mini-implants during simultaneous en-masse retraction and intrusion using two, three, and four mini-implants combinations. A three-dimensional FEM model of maxillary teeth and periodontal ligament housed in the alveolar bone with extracted first premolarswasgenerated. The models were broadly divided into three groups according to the number of mini-implants. Mini-implants were placed bilaterally between the second premolar and molar in group I, and along with bilateral implants, an additional mid-implant was placed between the central incisors as in group II, whereas in group III, anterior mini-implants were placed in between lateral incisors and canine bilaterally. The two mini-implant model showed the maximum amount of retraction in the sagittal plane followed by three and four mini-implant models. In the vertical plane, all six anterior teeth showed intrusion only in the four mini-implant model. The stress in cortical bone, cancellous bone, PDL, around the mini-implants, and in lateral incisor was maximum in the three mini-implant model, followed by four mini-implants with the least stress in the two mini-implant model. The four mini-implant model is better than the three and two mini-implants model as there is a more even distribution of force in the four mini-implants model as compared to the three mini-implants model.
{"title":"Comparative evaluation of effectiveness of three versus four mini-implants for simultaneous intrusion and retraction of maxillary anterior teeth: A 3D FEM study","authors":"Sajal Gupta, Amit Kr. Khera, Pradeep Raghav, A. Wadhawan, Pankaj Wadhwa, Nupur Sharma","doi":"10.4103/jos.jos_57_23","DOIUrl":"https://doi.org/10.4103/jos.jos_57_23","url":null,"abstract":"\u0000 \u0000 To evaluate and compare the displacement pattern of maxillary anterior teeth in the sagittal and vertical planes and evaluate the stress distribution in pdl, bone, teeth of the maxillary anterior region, and around the mini-implants during simultaneous en-masse retraction and intrusion using two, three, and four mini-implants combinations.\u0000 \u0000 \u0000 \u0000 A three-dimensional FEM model of maxillary teeth and periodontal ligament housed in the alveolar bone with extracted first premolarswasgenerated. The models were broadly divided into three groups according to the number of mini-implants. Mini-implants were placed bilaterally between the second premolar and molar in group I, and along with bilateral implants, an additional mid-implant was placed between the central incisors as in group II, whereas in group III, anterior mini-implants were placed in between lateral incisors and canine bilaterally.\u0000 \u0000 \u0000 \u0000 The two mini-implant model showed the maximum amount of retraction in the sagittal plane followed by three and four mini-implant models. In the vertical plane, all six anterior teeth showed intrusion only in the four mini-implant model. The stress in cortical bone, cancellous bone, PDL, around the mini-implants, and in lateral incisor was maximum in the three mini-implant model, followed by four mini-implants with the least stress in the two mini-implant model.\u0000 \u0000 \u0000 \u0000 The four mini-implant model is better than the three and two mini-implants model as there is a more even distribution of force in the four mini-implants model as compared to the three mini-implants model.\u0000","PeriodicalId":16604,"journal":{"name":"Journal of Orthodontic Science","volume":"34 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141044911","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}
In most recent studies, long-term retention after orthodontic treatment has been hypothesized that may be necessary to maintain the stability of the dentition and avoid post-treatment changes. The bonded fixed retainer is characterized by its clinical effectiveness, patient acceptance, and lack of patient complaints as compared with a removable retainer. An electronic database (such as PubMed, PubMed Central, Web of Science, Science Direct, Cochrane Library, Scopus, and ResearchGate) has been collected using specific keywords. Of the 152 articles, only randomized clinical trials that investigated different types of fixed retainers or compared fixed with removable retainers were illustrated in tables and included in this review. The present review has gone some way towards enhancing our understanding of the bonded fixed retainer, types, material, bonding methods, and how to improve its the success rate, besides the importance of new technology in fixed orthodontic retention.
{"title":"Keeping the teeth in line: Exploring the necessity of bonded retainers in orthodontics: A narrative review","authors":"E. S. Jasim, A. Kadhum, Istabrak Hasan","doi":"10.4103/jos.jos_159_23","DOIUrl":"https://doi.org/10.4103/jos.jos_159_23","url":null,"abstract":"In most recent studies, long-term retention after orthodontic treatment has been hypothesized that may be necessary to maintain the stability of the dentition and avoid post-treatment changes. The bonded fixed retainer is characterized by its clinical effectiveness, patient acceptance, and lack of patient complaints as compared with a removable retainer. An electronic database (such as PubMed, PubMed Central, Web of Science, Science Direct, Cochrane Library, Scopus, and ResearchGate) has been collected using specific keywords. Of the 152 articles, only randomized clinical trials that investigated different types of fixed retainers or compared fixed with removable retainers were illustrated in tables and included in this review. The present review has gone some way towards enhancing our understanding of the bonded fixed retainer, types, material, bonding methods, and how to improve its the success rate, besides the importance of new technology in fixed orthodontic retention.","PeriodicalId":16604,"journal":{"name":"Journal of Orthodontic Science","volume":"20 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141048580","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}
Prateeksha Bora, Poonam Agrawal, D. Bagga, K. Priya, Neelam Singh, Rishibha Bhardwaj
One of the major objectives of orthodontic treatment is to improve facial attractiveness. To orthodontists, this means that the nose, lips, and chin form an attractive outline when the faces are viewed from one side. The aim of the study is to evaluate the influence of lip inclination on perceived attractiveness using North Indian observer ratings on profile silhouettes. A profile photograph of an Indian male and female were converted to silhouettes for the study using computer software. The lip inclination of the idealized profile image was altered in two-degree increments to create a series of profiles with different upper lip inclination angles and rated by laypersons on a Likert scale. An angle of 79° was deemed to be neither attractive nor unattractive. Therefore, within the range of 65°–75°, the pictures were deemed acceptable. Angles above or below this range, up to 91° were perceived as slightly unattractive, and anything outside the range of 93°–105° was deemed very unattractive. The study is not generalizable to ethnic groups other than the North Indian population. Another limitation is the inability to visualize the entire face for a complete facial analysis. An upper lip inclination of 75°–85° in the male profile was associated with perceived attractiveness in all three groups whereas it was in the range of 65°–75° for a female profile. An upper lip inclination angle ranging from 95° to 105° was associated with unattractiveness in all three groups of observers and requires correctional intervention.
{"title":"Influence of upper lip inclination on facial profile attractiveness: A perceptive analysis","authors":"Prateeksha Bora, Poonam Agrawal, D. Bagga, K. Priya, Neelam Singh, Rishibha Bhardwaj","doi":"10.4103/jos.jos_71_23","DOIUrl":"https://doi.org/10.4103/jos.jos_71_23","url":null,"abstract":"\u0000 \u0000 One of the major objectives of orthodontic treatment is to improve facial attractiveness. To orthodontists, this means that the nose, lips, and chin form an attractive outline when the faces are viewed from one side. The aim of the study is to evaluate the influence of lip inclination on perceived attractiveness using North Indian observer ratings on profile silhouettes.\u0000 \u0000 \u0000 \u0000 A profile photograph of an Indian male and female were converted to silhouettes for the study using computer software. The lip inclination of the idealized profile image was altered in two-degree increments to create a series of profiles with different upper lip inclination angles and rated by laypersons on a Likert scale.\u0000 \u0000 \u0000 \u0000 An angle of 79° was deemed to be neither attractive nor unattractive. Therefore, within the range of 65°–75°, the pictures were deemed acceptable. Angles above or below this range, up to 91° were perceived as slightly unattractive, and anything outside the range of 93°–105° was deemed very unattractive.\u0000 \u0000 \u0000 \u0000 The study is not generalizable to ethnic groups other than the North Indian population. Another limitation is the inability to visualize the entire face for a complete facial analysis.\u0000 \u0000 \u0000 \u0000 An upper lip inclination of 75°–85° in the male profile was associated with perceived attractiveness in all three groups whereas it was in the range of 65°–75° for a female profile. An upper lip inclination angle ranging from 95° to 105° was associated with unattractiveness in all three groups of observers and requires correctional intervention.\u0000","PeriodicalId":16604,"journal":{"name":"Journal of Orthodontic Science","volume":"35 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139965472","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}
Horodynski Martina, A. De Stefano Adriana, Bottone Ernesto, Impellizzeri Alessandra, A. V. Roberto, Galluccio Gabriella
Distalization is one of the most useful movements in orthodontic treatments. The aim of this systematic review is to analyze the effectiveness of lower molar distalization using clear aligner therapy (CAT). An electronic search was made from January 2012 to October 2022 using PubMed, Scopus, and LILACS databases without language limitations. This systematic review followed the Preferred Reporting Items for Systematic reviews and Meta-Analyses checklist. The search strategy resulted in 151 studies. A screening was performed to remove duplicates, and all the studies that did not respond to our questions for the title or abstract. Three studies underwent full text analysis. From the evaluation of the studies included in this review, it is possible to state that lower molar distalization is a clinical solution, but it is not a full bodily movement. CAT can provide more specifically a distal tipping movement. This is confirmed analyzing the discrepancy between expected movement and obtained movement. CAT can be considered a valid therapeutic option in patients with dental class III malocclusion, but it is obtained as a tipping movement instead of a body movement. Over-correction should be considered during the planning of the therapy.
{"title":"Lower molar distalization using clear aligners: Is it effective? A systematic review","authors":"Horodynski Martina, A. De Stefano Adriana, Bottone Ernesto, Impellizzeri Alessandra, A. V. Roberto, Galluccio Gabriella","doi":"10.4103/jos.jos_174_23","DOIUrl":"https://doi.org/10.4103/jos.jos_174_23","url":null,"abstract":"Distalization is one of the most useful movements in orthodontic treatments. The aim of this systematic review is to analyze the effectiveness of lower molar distalization using clear aligner therapy (CAT). An electronic search was made from January 2012 to October 2022 using PubMed, Scopus, and LILACS databases without language limitations. This systematic review followed the Preferred Reporting Items for Systematic reviews and Meta-Analyses checklist. The search strategy resulted in 151 studies. A screening was performed to remove duplicates, and all the studies that did not respond to our questions for the title or abstract. Three studies underwent full text analysis. From the evaluation of the studies included in this review, it is possible to state that lower molar distalization is a clinical solution, but it is not a full bodily movement. CAT can provide more specifically a distal tipping movement. This is confirmed analyzing the discrepancy between expected movement and obtained movement. CAT can be considered a valid therapeutic option in patients with dental class III malocclusion, but it is obtained as a tipping movement instead of a body movement. Over-correction should be considered during the planning of the therapy.","PeriodicalId":16604,"journal":{"name":"Journal of Orthodontic Science","volume":"65 39","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139966043","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}
Parul Priya, A. Jain, R. R. Prasad, Shresthaa Singh, Abhishek Kumar, Priyanka Kumari
To evaluate and compare the distribution of stress and displacement of teeth during mandibular arch distalization using buccal shelf screws. Three three-dimensional finite element models of mandibular arch were constructed with third molars extracted. Models 1, 2, and 3 were constructed on the basis of the lever arm heights of 0 mm, 3 mm, and 6 mm, respectively, between the lateral incisor and canine. A buccal shelf screw was placed at the area in the second molar region with the initial point of insertion being inter-dental between the first and second molars and 2 mm below the mucogingival junction. MBT pre-adjusted brackets (slot size 0.022 × 0.028”) were placed over the clinical crown’s center with a 0.019 × 0.025” stainless-steel archwire on three models. A retraction force of 300 g was applied with buccal shelf screws and a lever arm bilaterally using nickel-titanium closed coil springs. The displacement of each tooth was calculated on X, Y, and Z axes, and the von Mises stress distribution was visualized using color-coded scales using ANSYS 12.1 software. The maximum von Mises stress in the cortical and cancellous bones was observed in model 1. The maximum von Mises stress in the buccal shelf screw and the cortical bone decreased as the height of the lever arm increased. Applying orthodontic forces at the level of 6 mm lever arm height resulted in greater biomechanical bodily movement in distalization of the mandibular molars compared to when the orthodontic forces were applied at the level of 0 mm lever arm height. Displacement of the entire arch may be dictated by a direct relationship between the center of resistance of the whole arch and the line of action generated between the buccal shelf screw and force application points at the archwire, which makes the total arch movement highly predictable.
评估和比较使用颊侧架螺钉进行下颌牙弓远端化时牙齿的应力分布和位移。 在拔除第三磨牙的情况下，构建了三个下颌牙弓三维有限元模型。模型 1、2 和 3 是根据侧切牙和犬齿之间的杠杆臂高度分别为 0 毫米、3 毫米和 6 毫米构建的。在第二磨牙区域放置了一个颊侧架螺钉，初始插入点位于第一和第二磨牙之间的齿间，粘龈交界处下方 2 毫米处。在三个模型上，用 0.019 × 0.025 英寸的不锈钢弓丝将 MBT 预调托槽（槽大小为 0.022 × 0.028 英寸）置于临床牙冠中心。使用颊侧架螺钉和双侧杠杆臂（使用镍钛闭合螺旋弹簧）施加 300 g 的牵引力。使用 ANSYS 12.1 软件计算每颗牙齿在 X、Y 和 Z 轴上的位移，并使用彩色编码刻度显示 von Mises 应力分布。 在模型 1 中观察到皮质骨和松质骨中的最大 von Mises 应力。随着杠杆臂高度的增加，颊侧架螺钉和皮质骨中的最大 von Mises 应力也随之减小。与在杠杆臂高度为 0 毫米的水平施加正畸力相比，在杠杆臂高度为 6 毫米的水平施加正畸力会导致下颌磨牙远端化中更大的生物力学身体移动。 整个牙弓的位移可能是由整个牙弓的阻力中心与颊侧架螺钉和弓丝施力点之间产生的作用线之间的直接关系决定的，这使得整个牙弓的移动具有很高的可预测性。
{"title":"Displacement and stress distribution pattern during complete mandibular arch distalization using buccal shelf bone screws – A three-dimensional finite element study","authors":"Parul Priya, A. Jain, R. R. Prasad, Shresthaa Singh, Abhishek Kumar, Priyanka Kumari","doi":"10.4103/jos.jos_82_23","DOIUrl":"https://doi.org/10.4103/jos.jos_82_23","url":null,"abstract":"\u0000 \u0000 To evaluate and compare the distribution of stress and displacement of teeth during mandibular arch distalization using buccal shelf screws.\u0000 \u0000 \u0000 \u0000 Three three-dimensional finite element models of mandibular arch were constructed with third molars extracted. Models 1, 2, and 3 were constructed on the basis of the lever arm heights of 0 mm, 3 mm, and 6 mm, respectively, between the lateral incisor and canine. A buccal shelf screw was placed at the area in the second molar region with the initial point of insertion being inter-dental between the first and second molars and 2 mm below the mucogingival junction. MBT pre-adjusted brackets (slot size 0.022 × 0.028”) were placed over the clinical crown’s center with a 0.019 × 0.025” stainless-steel archwire on three models. A retraction force of 300 g was applied with buccal shelf screws and a lever arm bilaterally using nickel-titanium closed coil springs. The displacement of each tooth was calculated on X, Y, and Z axes, and the von Mises stress distribution was visualized using color-coded scales using ANSYS 12.1 software.\u0000 \u0000 \u0000 \u0000 The maximum von Mises stress in the cortical and cancellous bones was observed in model 1. The maximum von Mises stress in the buccal shelf screw and the cortical bone decreased as the height of the lever arm increased. Applying orthodontic forces at the level of 6 mm lever arm height resulted in greater biomechanical bodily movement in distalization of the mandibular molars compared to when the orthodontic forces were applied at the level of 0 mm lever arm height.\u0000 \u0000 \u0000 \u0000 Displacement of the entire arch may be dictated by a direct relationship between the center of resistance of the whole arch and the line of action generated between the buccal shelf screw and force application points at the archwire, which makes the total arch movement highly predictable.\u0000","PeriodicalId":16604,"journal":{"name":"Journal of Orthodontic Science","volume":"83 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139966589","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}
D. A. Al-Dulaimy, Fudhla S. Al-Zubaydi, M. Al-Khannaq, Mohammed Nahidh
This study aimed to document knowledge, awareness, and ability to provide different aspects of orthodontic treatment currently provided by pedodontists. A 14-item online questionnaire was sent to 120 pedodontists in different countries. Responses received within 2 months were analyzed as frequency and percentage. The response rate was 68.3%. Most respondents demonstrated adequate information about the etiology and diagnosis of different malocclusions and paid attention to patients’ facial characteristics. The desire to learn from continuing education programs was higher for preventive and interceptive orthodontics. Space maintainers, habit breakers, management of anterior crossbite, and serial extraction were the orthodontic services most provided by pedodontists. Pedodontists should attend to continuing education about the etiology, diagnosis, and treatment planning for various malocclusions.
{"title":"Pedodontists’ awareness of orthodontics: An online survey","authors":"D. A. Al-Dulaimy, Fudhla S. Al-Zubaydi, M. Al-Khannaq, Mohammed Nahidh","doi":"10.4103/jos.jos_125_23","DOIUrl":"https://doi.org/10.4103/jos.jos_125_23","url":null,"abstract":"\u0000 \u0000 This study aimed to document knowledge, awareness, and ability to provide different aspects of orthodontic treatment currently provided by pedodontists.\u0000 \u0000 \u0000 \u0000 A 14-item online questionnaire was sent to 120 pedodontists in different countries. Responses received within 2 months were analyzed as frequency and percentage.\u0000 \u0000 \u0000 \u0000 The response rate was 68.3%. Most respondents demonstrated adequate information about the etiology and diagnosis of different malocclusions and paid attention to patients’ facial characteristics. The desire to learn from continuing education programs was higher for preventive and interceptive orthodontics. Space maintainers, habit breakers, management of anterior crossbite, and serial extraction were the orthodontic services most provided by pedodontists.\u0000 \u0000 \u0000 \u0000 Pedodontists should attend to continuing education about the etiology, diagnosis, and treatment planning for various malocclusions.\u0000","PeriodicalId":16604,"journal":{"name":"Journal of Orthodontic Science","volume":"10 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139966024","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}
To investigate the socio-economic and personal factors that impact parental decisions regarding orthodontic treatment for their children in Madinah, Saudi Arabia. A digital self-administered questionnaire was employed to collect data from 414 parents, focusing on their motivations and barriers that influence their decision-making process regarding orthodontic treatment. Income level was the most significant factor in orthodontic decisions. Parents with higher incomes were twice as likely to choose orthodontic treatment for esthetic reasons compared to parents with middle incomes. The main incentive for seeking treatment was getting advice from dental professionals, with 60% of participants rating it as the most important factor. 34.5% of respondents identified cost as the main barrier, with middle-income parents being 151% more inclined to perceive it as a significant barrier compared to high-income parents. Gender dynamics revealed that mothers exhibited 48.9% greater concern regarding treatment costs compared to fathers, whereas fathers placed 2.105 times more importance on the orthodontist’s reputation than mothers. Income levels, along with other socio-economic factors and gender dynamics, have a significant influence on parental decisions regarding orthodontic care. Personalized consultations that address these variations are crucial for improving communication between patients and practitioners and increasing the accessibility of treatment.
{"title":"Socio-economic and gender dynamics influence on the parental decision-making process for children’s orthodontic care – A study in Madinah, Saudi Arabia","authors":"A. Almarhoumi","doi":"10.4103/jos.jos_184_23","DOIUrl":"https://doi.org/10.4103/jos.jos_184_23","url":null,"abstract":"\u0000 \u0000 To investigate the socio-economic and personal factors that impact parental decisions regarding orthodontic treatment for their children in Madinah, Saudi Arabia.\u0000 \u0000 \u0000 \u0000 A digital self-administered questionnaire was employed to collect data from 414 parents, focusing on their motivations and barriers that influence their decision-making process regarding orthodontic treatment.\u0000 \u0000 \u0000 \u0000 Income level was the most significant factor in orthodontic decisions. Parents with higher incomes were twice as likely to choose orthodontic treatment for esthetic reasons compared to parents with middle incomes. The main incentive for seeking treatment was getting advice from dental professionals, with 60% of participants rating it as the most important factor. 34.5% of respondents identified cost as the main barrier, with middle-income parents being 151% more inclined to perceive it as a significant barrier compared to high-income parents. Gender dynamics revealed that mothers exhibited 48.9% greater concern regarding treatment costs compared to fathers, whereas fathers placed 2.105 times more importance on the orthodontist’s reputation than mothers.\u0000 \u0000 \u0000 \u0000 Income levels, along with other socio-economic factors and gender dynamics, have a significant influence on parental decisions regarding orthodontic care. Personalized consultations that address these variations are crucial for improving communication between patients and practitioners and increasing the accessibility of treatment.\u0000","PeriodicalId":16604,"journal":{"name":"Journal of Orthodontic Science","volume":"63 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139966168","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}
S. S. Othman, Amr Abd-Elmonaem El-Waseif, Mohammed Abdullah Hameed, Q. A. Abbas
The need to overcome the failure of orthodontic micro-implants which might reach to 30% has led to the development of different methods, one of which is nanoparticle deposition. To evaluate the anti-microbial efficiency of TiO2 and ZnO nanoparticles (NP) when used as a coating for orthodontic micro-implants. Thirty titanium alloy micro-implants were used in the presented study. They were divided into three groups according to the coating method and the coating materials used: the control group without surface coating; the titanium dioxide (TiO2)-coated group, in which direct current (DC) spattering was used to coat the micro-implants with a TiO2 layer; and the TiO2 and zinc oxide (TiO2ZnO)-coated group, in which the micro-implants were coated with a TiO2 layer via direct current (DC) spattering and a zinc oxide (ZnO) layer via laser vacuum. The micro-implant surfaces were characterized using scanning electron microscopy (SEM) and an energy-dispersive spectrometer (EDS). The antibacterial susceptibility was assessed using gram-positive and gram-negative bacteria. SEM and EDS tests confirmed the coating of the micro-implants in the TiO2- and TiO2ZnO-coated groups. The micro-implants in the TiO2- and TiO2ZnO-coated groups demonstrated higher antibacterial ability than the control group. This study demonstrated the significance of improving the surface of orthodontic micro-implants by coating them with TiO2 and ZnO nanoparticles to improve osseointegration and prevent biofilm formation.
{"title":"Antimicrobial behavior of nanocoated orthodontic micro-implants: An in vitro study","authors":"S. S. Othman, Amr Abd-Elmonaem El-Waseif, Mohammed Abdullah Hameed, Q. A. Abbas","doi":"10.4103/jos.jos_115_23","DOIUrl":"https://doi.org/10.4103/jos.jos_115_23","url":null,"abstract":"\u0000 \u0000 The need to overcome the failure of orthodontic micro-implants which might reach to 30% has led to the development of different methods, one of which is nanoparticle deposition.\u0000 \u0000 \u0000 \u0000 To evaluate the anti-microbial efficiency of TiO2 and ZnO nanoparticles (NP) when used as a coating for orthodontic micro-implants.\u0000 \u0000 \u0000 \u0000 Thirty titanium alloy micro-implants were used in the presented study. They were divided into three groups according to the coating method and the coating materials used: the control group without surface coating; the titanium dioxide (TiO2)-coated group, in which direct current (DC) spattering was used to coat the micro-implants with a TiO2 layer; and the TiO2 and zinc oxide (TiO2ZnO)-coated group, in which the micro-implants were coated with a TiO2 layer via direct current (DC) spattering and a zinc oxide (ZnO) layer via laser vacuum. The micro-implant surfaces were characterized using scanning electron microscopy (SEM) and an energy-dispersive spectrometer (EDS). The antibacterial susceptibility was assessed using gram-positive and gram-negative bacteria.\u0000 \u0000 \u0000 \u0000 SEM and EDS tests confirmed the coating of the micro-implants in the TiO2- and TiO2ZnO-coated groups. The micro-implants in the TiO2- and TiO2ZnO-coated groups demonstrated higher antibacterial ability than the control group.\u0000 \u0000 \u0000 \u0000 This study demonstrated the significance of improving the surface of orthodontic micro-implants by coating them with TiO2 and ZnO nanoparticles to improve osseointegration and prevent biofilm formation.\u0000","PeriodicalId":16604,"journal":{"name":"Journal of Orthodontic Science","volume":"56 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139965505","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}
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