Jing Liu, Kyong-Min Koh, Sung-Hwan Choi, Ji-Hoi Kim, Jung-Yul Cha
Objective: This study aimed to evaluate the superimposition accuracy of digital modes for measuring tooth movement in patients requiring anterior retraction after premolar extraction based on the proposed reference regions.
Methods: Forty patients treated with bilateral maxillary first premolar extraction were divided into two groups: moderate retraction (< 7.0 mm) and maximum retraction (≥ 7.0 mm). Central incisor displacement was measured using cephalometric superimpositions and three-dimensional (3D) digital superimpositions with the 3rd or 4th ruga as the reference point. The Wilcoxon signed-rank test and linear regression analyses were performed to test the significance of the differences and relationships between the two measurement techniques.
Results: In the moderate retraction group, the central incisor anteroposterior displacement values did not differ significantly between 3D digital and cephalometric superimpositions. However, in the maximum-retraction group, significant differences were observed between the anteroposterior displacement evaluated by the 3rd ruga superimposition and cephalometric methods (p < 0.05).
Conclusions: This study demonstrated that 3D digital superimpositions were clinically as reliable as cephalometric superimpositions in assessing tooth movements in patients requiring moderate retraction. However, the reference point should be carefully examined in patients who require maximum retraction.
{"title":"Validation of three-dimensional digital model superimpositions based on palatal structures in patients with maximum anterior tooth retraction following premolar extraction.","authors":"Jing Liu, Kyong-Min Koh, Sung-Hwan Choi, Ji-Hoi Kim, Jung-Yul Cha","doi":"10.4041/kjod21.126","DOIUrl":"https://doi.org/10.4041/kjod21.126","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to evaluate the superimposition accuracy of digital modes for measuring tooth movement in patients requiring anterior retraction after premolar extraction based on the proposed reference regions.</p><p><strong>Methods: </strong>Forty patients treated with bilateral maxillary first premolar extraction were divided into two groups: moderate retraction (< 7.0 mm) and maximum retraction (≥ 7.0 mm). Central incisor displacement was measured using cephalometric superimpositions and three-dimensional (3D) digital superimpositions with the 3rd or 4th ruga as the reference point. The Wilcoxon signed-rank test and linear regression analyses were performed to test the significance of the differences and relationships between the two measurement techniques.</p><p><strong>Results: </strong>In the moderate retraction group, the central incisor anteroposterior displacement values did not differ significantly between 3D digital and cephalometric superimpositions. However, in the maximum-retraction group, significant differences were observed between the anteroposterior displacement evaluated by the 3rd ruga superimposition and cephalometric methods (<i>p</i> < 0.05).</p><p><strong>Conclusions: </strong>This study demonstrated that 3D digital superimpositions were clinically as reliable as cephalometric superimpositions in assessing tooth movements in patients requiring moderate retraction. However, the reference point should be carefully examined in patients who require maximum retraction.</p>","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2022-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/00/42/kjod-52-4-258.PMC9314216.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40645862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-25Epub Date: 2022-03-07DOI: 10.4041/kjod21.255
Lin Xu, Li Mei, Ruiqi Lu, Yuan Li, Hanshi Li, Yu Li
Objective: Poor experience with Invisalign treatment affects patient compliance and, thus, treatment outcome. Knowing the potential discomfort level in advance can help orthodontists better prepare the patient to overcome the difficult stage. This study aimed to construct artificial neural networks (ANNs) to predict patient experience in the early stages of Invisalign treatment.
Methods: In total, 196 patients were enrolled. Data collection included questionnaires on pain, anxiety, and quality of life (QoL). A four-layer fully connected multilayer perception with three backpropagations was constructed to predict patient experience of the treatment. The input data comprised 17 clinical features. The partial derivative method was used to calculate the relative contributions of each input in the ANNs.
Results: The predictive success rates for pain, anxiety, and QoL were 87.7%, 93.4%, and 92.4%, respectively. ANNs for predicting pain, anxiety, and QoL yielded areas under the curve of 0.963, 0.992, and 0.982, respectively. The number of teeth with lingual attachments was the most important factor affecting the outcome of negative experience, followed by the number of lingual buttons and upper incisors with attachments.
Conclusions: The constructed ANNs in this preliminary study show good accuracy in predicting patient experience (i.e., pain, anxiety, and QoL) of Invisalign treatment. Artificial intelligence system developed for predicting patient comfort has potential for clinical application to enhance patient compliance.
{"title":"Predicting patient experience of Invisalign treatment: An analysis using artificial neural network.","authors":"Lin Xu, Li Mei, Ruiqi Lu, Yuan Li, Hanshi Li, Yu Li","doi":"10.4041/kjod21.255","DOIUrl":"https://doi.org/10.4041/kjod21.255","url":null,"abstract":"<p><strong>Objective: </strong>Poor experience with Invisalign treatment affects patient compliance and, thus, treatment outcome. Knowing the potential discomfort level in advance can help orthodontists better prepare the patient to overcome the difficult stage. This study aimed to construct artificial neural networks (ANNs) to predict patient experience in the early stages of Invisalign treatment.</p><p><strong>Methods: </strong>In total, 196 patients were enrolled. Data collection included questionnaires on pain, anxiety, and quality of life (QoL). A four-layer fully connected multilayer perception with three backpropagations was constructed to predict patient experience of the treatment. The input data comprised 17 clinical features. The partial derivative method was used to calculate the relative contributions of each input in the ANNs.</p><p><strong>Results: </strong>The predictive success rates for pain, anxiety, and QoL were 87.7%, 93.4%, and 92.4%, respectively. ANNs for predicting pain, anxiety, and QoL yielded areas under the curve of 0.963, 0.992, and 0.982, respectively. The number of teeth with lingual attachments was the most important factor affecting the outcome of negative experience, followed by the number of lingual buttons and upper incisors with attachments.</p><p><strong>Conclusions: </strong>The constructed ANNs in this preliminary study show good accuracy in predicting patient experience (i.e., pain, anxiety, and QoL) of Invisalign treatment. Artificial intelligence system developed for predicting patient comfort has potential for clinical application to enhance patient compliance.</p>","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2022-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/db/fb/kjod-52-4-268.PMC9314214.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40535155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Objective: This study aimed to systematically analyze the effect and stability of miniscrew-assisted rapid palatal expansion (MARPE) to provide a reference for the clinical treatment of patients with maxillary transverse deficiency (MTD).
Methods: We searched PubMed, Science Direct, Web of Science, Embase, Cochrane Library, CNKI, and Wanfang Database for relevant studies published before February 18, 2021 and selected them according to the eligibility criteria. The Cochrane Handbook for Systematic Reviews (version 5.1.0) criteria were used for the quality assessment of randomized controlled trials, while the scoring protocol of the methodological index for non-randomized studies was used for non-randomized controlled trials. Statistical analysis was performed using the RevMan5.3 software.
Results: All the included studies showed a relatively high success rate of expansion. The changes in both the intermolar and alveolar widths after MARPE were statistically significant. MARPE exhibited greater skeletal expansion effects than did conventional RPE. The midpalatal suture was opened in parallel after MARPE. A small amount of relapse was observed 1 year after expansion. MARPE caused tooth inclination and a decrease in alveolar height, but it was less significant than in conventional RPE.
Conclusions: MARPE may be an effective treatment modality for patients with MTD. It causes great transverse skeletal expansion in late adolescence. In comparison to conventional RPE, MARPE has lower detrimental periodontal effects and has certain clinical advantages.
目的:本研究旨在系统分析微型辅助快速腭扩张术(MARPE)的效果及稳定性，为临床治疗上颌横突缺乏症(MTD)患者提供参考。方法:检索PubMed、Science Direct、Web of Science、Embase、Cochrane Library、CNKI、万方数据库等于2021年2月18日前发表的相关研究，并根据入选标准进行筛选。随机对照试验质量评价采用Cochrane系统评价手册(5.1.0版)标准，非随机对照试验质量评价采用方法学指标评分方案。采用RevMan5.3软件进行统计分析。结果:所有纳入的研究均显示出较高的扩张成功率。MARPE后磨牙间和牙槽宽度的变化均有统计学意义。MARPE表现出比常规RPE更大的骨骼扩张效应。MARPE后平行打开中腭缝线。扩大后1年有少量复发。MARPE引起牙齿倾斜和牙槽高度降低，但与常规RPE相比，其影响较小。结论:MARPE可能是MTD患者的一种有效治疗方式。它会在青春期后期引起巨大的横向骨骼扩张。与常规RPE相比，MARPE对牙周的不良影响较小，具有一定的临床优势。
{"title":"Effect and stability of miniscrew-assisted rapid palatal expansion: A systematic review and meta-analysis.","authors":"Xinyi Huang, Yu Han, Shuangyan Yang","doi":"10.4041/kjod21.324","DOIUrl":"https://doi.org/10.4041/kjod21.324","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to systematically analyze the effect and stability of miniscrew-assisted rapid palatal expansion (MARPE) to provide a reference for the clinical treatment of patients with maxillary transverse deficiency (MTD).</p><p><strong>Methods: </strong>We searched PubMed, Science Direct, Web of Science, Embase, Cochrane Library, CNKI, and Wanfang Database for relevant studies published before February 18, 2021 and selected them according to the eligibility criteria. The Cochrane Handbook for Systematic Reviews (version 5.1.0) criteria were used for the quality assessment of randomized controlled trials, while the scoring protocol of the methodological index for non-randomized studies was used for non-randomized controlled trials. Statistical analysis was performed using the RevMan5.3 software.</p><p><strong>Results: </strong>All the included studies showed a relatively high success rate of expansion. The changes in both the intermolar and alveolar widths after MARPE were statistically significant. MARPE exhibited greater skeletal expansion effects than did conventional RPE. The midpalatal suture was opened in parallel after MARPE. A small amount of relapse was observed 1 year after expansion. MARPE caused tooth inclination and a decrease in alveolar height, but it was less significant than in conventional RPE.</p><p><strong>Conclusions: </strong>MARPE may be an effective treatment modality for patients with MTD. It causes great transverse skeletal expansion in late adolescence. In comparison to conventional RPE, MARPE has lower detrimental periodontal effects and has certain clinical advantages.</p>","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/6a/90/kjod-52-5-334.PMC9512629.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40512146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jiangwei Wang, Yingying Yang, Yingxue Wang, Lu Zhang, Wei Ji, Zheng Hong, Linkun Zhang
Objective: This study aimed to estimate the clinical effects of different types of bone-anchored maxillary protraction devices by using a network meta-analysis.
Methods: We searched seven databases for randomized and controlled clinical trials that compared bone-anchored maxillary protraction with tooth-anchored maxillary protraction interventions or untreated groups up to May 2021. After literature selection, data extraction, and quality assessment, we calculated the mean differences, 95% confidence intervals, and surface under the cumulative ranking scores of eleven indicators. Statistical analysis was performed using R statistical software with the GeMTC package based on the Bayesian framework.
Results: Six interventions and 667 patients were involved in 18 studies. In comparison with the tooth-anchored groups, the bone-anchored groups showed significantly more increases in Sella-Nasion-Subspinale (°), Subspinale-Nasion-Supramentale(°) and significantly fewer increases in mandibular plane angle and the labial proclination angle of upper incisors. In comparison with the control group, Sella-Nasion-Supramentale(°) decreased without any statistical significance in all treated groups. IMPA (angle of lower incisors and mandibular plane) decreased in groups with facemasks and increased in other groups.
Conclusions: Bone-anchored maxillary protraction can promote greater maxillary forward movement and correct the Class III intermaxillary relationship better, in addition to showing less clockwise rotation of mandible and labial proclination of upper incisors. However, strengthening anchorage could not inhibit mandibular growth better and the lingual inclination of lower incisors caused by the treatment is related to the use of a facemask.
{"title":"Clinical effectiveness of different types of bone-anchored maxillary protraction devices for skeletal Class III malocclusion: Systematic review and network meta-analysis.","authors":"Jiangwei Wang, Yingying Yang, Yingxue Wang, Lu Zhang, Wei Ji, Zheng Hong, Linkun Zhang","doi":"10.4041/kjod21.264","DOIUrl":"10.4041/kjod21.264","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to estimate the clinical effects of different types of bone-anchored maxillary protraction devices by using a network meta-analysis.</p><p><strong>Methods: </strong>We searched seven databases for randomized and controlled clinical trials that compared bone-anchored maxillary protraction with tooth-anchored maxillary protraction interventions or untreated groups up to May 2021. After literature selection, data extraction, and quality assessment, we calculated the mean differences, 95% confidence intervals, and surface under the cumulative ranking scores of eleven indicators. Statistical analysis was performed using R statistical software with the GeMTC package based on the Bayesian framework.</p><p><strong>Results: </strong>Six interventions and 667 patients were involved in 18 studies. In comparison with the tooth-anchored groups, the bone-anchored groups showed significantly more increases in Sella-Nasion-Subspinale (°), Subspinale-Nasion-Supramentale(°) and significantly fewer increases in mandibular plane angle and the labial proclination angle of upper incisors. In comparison with the control group, Sella-Nasion-Supramentale(°) decreased without any statistical significance in all treated groups. IMPA (angle of lower incisors and mandibular plane) decreased in groups with facemasks and increased in other groups.</p><p><strong>Conclusions: </strong>Bone-anchored maxillary protraction can promote greater maxillary forward movement and correct the Class III intermaxillary relationship better, in addition to showing less clockwise rotation of mandible and labial proclination of upper incisors. However, strengthening anchorage could not inhibit mandibular growth better and the lingual inclination of lower incisors caused by the treatment is related to the use of a facemask.</p>","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/1c/95/kjod-52-5-313.PMC9512627.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40512147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ja Hyeong Ku, Byoul Han, Jaehyun Kim, Jiyoung Oh, Yoon-Ah Kook, Yoonji Kim
Objective The aim of this study was 1) to investigate the prevalence and pattern of dental anomalies (DAs), 2) to compare DAs according to the type of malocclusion, and 3) to investigate the correlation between tooth impaction and other DAs in the Korean orthodontic population. Methods A total of 3,240 orthodontic patients were classified as Class I, Class II, or Class III malocclusion groups. The presence and location of common DAs, including impaction, microdontia, agenesis, supernumerary tooth, transposition, and fusion, were identified by examining diagnostic records. Furthermore, samples were classified as Group 1 without impaction or Group 2 with impaction. The prevalence of other DAs concurrent with impaction was investigated and compared to Group 1. Results Impaction was the most prevalent DA, followed by microdontia, agenesis, and supernumerary. Class I and Class III groups showed the same order of prevalence, but agenesis was more frequent than microdontia in the Class II group. The prevalence of the four DAs was lowest in the Class III group. Overall, 8.6% of patients were classified into Group 2. The incidence of DAs other than impaction and the prevalence of multiple concurrent DAs were significantly higher in Group 2. Impaction showed a significant relationship with supernumerary tooth, transposition, and fusion. Conclusions The prevalence and pattern of DAs varied depending on the type of malocclusion. As there was a higher risk of other DAs in patients with impacted teeth, early detection of the impacted tooth and a detailed diagnosis of other possible DAs may be essential.
{"title":"Common dental anomalies in Korean orthodontic patients: An update.","authors":"Ja Hyeong Ku, Byoul Han, Jaehyun Kim, Jiyoung Oh, Yoon-Ah Kook, Yoonji Kim","doi":"10.4041/kjod21.280","DOIUrl":"https://doi.org/10.4041/kjod21.280","url":null,"abstract":"Objective The aim of this study was 1) to investigate the prevalence and pattern of dental anomalies (DAs), 2) to compare DAs according to the type of malocclusion, and 3) to investigate the correlation between tooth impaction and other DAs in the Korean orthodontic population. Methods A total of 3,240 orthodontic patients were classified as Class I, Class II, or Class III malocclusion groups. The presence and location of common DAs, including impaction, microdontia, agenesis, supernumerary tooth, transposition, and fusion, were identified by examining diagnostic records. Furthermore, samples were classified as Group 1 without impaction or Group 2 with impaction. The prevalence of other DAs concurrent with impaction was investigated and compared to Group 1. Results Impaction was the most prevalent DA, followed by microdontia, agenesis, and supernumerary. Class I and Class III groups showed the same order of prevalence, but agenesis was more frequent than microdontia in the Class II group. The prevalence of the four DAs was lowest in the Class III group. Overall, 8.6% of patients were classified into Group 2. The incidence of DAs other than impaction and the prevalence of multiple concurrent DAs were significantly higher in Group 2. Impaction showed a significant relationship with supernumerary tooth, transposition, and fusion. Conclusions The prevalence and pattern of DAs varied depending on the type of malocclusion. As there was a higher risk of other DAs in patients with impacted teeth, early detection of the impacted tooth and a detailed diagnosis of other possible DAs may be essential.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/d1/ec/kjod-52-5-324.PMC9512625.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40512148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
So-Hyun Park, Kyungsun Kim, Soha Cho, D. Chung, Sug-Joon Ahn
Objective To evaluate differences in the adhesion levels of the most common oral pathogens, Streptococcus mutans and Porphyromonas gingivalis, in human saliva-derived microcosm biofilms with respect to time and raw materials of orthodontic brackets. Methods The samples were classified into three groups of bracket materials 1) monocrystalline alumina ceramic (CR), 2) stainless steel metal (SS), and 3) polycarbonate plastic (PL), and a hydroxyapatite (HA) group was used to mimic the enamel surface. Saliva was collected from a healthy donor, and saliva-derived biofilms were grown on each sample. A real-time polymerase chain reaction was performed to quantitatively evaluate differences in the attachment levels of total bacteria, S. mutans and P. gingivalis at days 1 and 4. Results Adhesion of S. mutans and P. gingivalis to CR and HA was higher than the other bracket materials (SS = PL < CR = HA). Total bacteria demonstrated higher adhesion to HA than to bracket materials, but no significant differences in adhesion were observed among the bracket materials (CR = SS = PL < HA). From days 1 to 4, the adhesion of P. gingivalis decreased, while that of S. mutans and total bacteria increased, regardless of material type. Conclusions The higher adhesion of oral pathogens, such as S. mutans and P. gingivalis to CR suggests that the use of CR brackets possibly facilitates gingival inflammation and enamel decalcification during orthodontic treatment.
{"title":"Variation in adhesion of Streptococcus mutans and Porphyromonas gingivalis in saliva-derived biofilms on raw materials of orthodontic brackets","authors":"So-Hyun Park, Kyungsun Kim, Soha Cho, D. Chung, Sug-Joon Ahn","doi":"10.4041/kjod21.283","DOIUrl":"https://doi.org/10.4041/kjod21.283","url":null,"abstract":"Objective To evaluate differences in the adhesion levels of the most common oral pathogens, Streptococcus mutans and Porphyromonas gingivalis, in human saliva-derived microcosm biofilms with respect to time and raw materials of orthodontic brackets. Methods The samples were classified into three groups of bracket materials 1) monocrystalline alumina ceramic (CR), 2) stainless steel metal (SS), and 3) polycarbonate plastic (PL), and a hydroxyapatite (HA) group was used to mimic the enamel surface. Saliva was collected from a healthy donor, and saliva-derived biofilms were grown on each sample. A real-time polymerase chain reaction was performed to quantitatively evaluate differences in the attachment levels of total bacteria, S. mutans and P. gingivalis at days 1 and 4. Results Adhesion of S. mutans and P. gingivalis to CR and HA was higher than the other bracket materials (SS = PL < CR = HA). Total bacteria demonstrated higher adhesion to HA than to bracket materials, but no significant differences in adhesion were observed among the bracket materials (CR = SS = PL < HA). From days 1 to 4, the adhesion of P. gingivalis decreased, while that of S. mutans and total bacteria increased, regardless of material type. Conclusions The higher adhesion of oral pathogens, such as S. mutans and P. gingivalis to CR suggests that the use of CR brackets possibly facilitates gingival inflammation and enamel decalcification during orthodontic treatment.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2022-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80729571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-25DOI: 10.4041/kjod.2022.52.3.161
T. Eliades
The last 2 decades have witnessed an array of unprecedented developments in the publishing and managing scientific information and concomitantly to the oral health care practices. From the well-established model of evidence-based principles, which replaced the largely anecdotal evidence or simplified research approaches seen in our field in the 1970’s and 1980’s, we have gone into an era where the focus has been switched from evidence to highlighted and constant presence. The objective is now the bombardment of the practicing health care provider with information from many resources to maintain a constant interest: advertisement to lay persons to build a pressure for the use of specific appliances; organization of corporate symposia and pseudoscientific periodicals run by the industry; abundance of cases, materials, demonstration videos and statements on social media; paid speakers in symposia; key opinion specialists; the list in long... Despite its marketing and corporate advantages and profits, this practice may have unfavorable consequences for the outcome of treatment provided to patients, since it is based on the number and frequency of the repetition of a scientific information as opposed to quality reviewing. Unfortunately, democratization of the scientific information dissemination is not always valid and may have unpredictable sequalae. The ancient Greek proverb oὐκ ἐν τῷ πολλῷ τὸ εὖ (the good is not in the quantity) finds a suitable application in cases where everybody uses a therapeutic mode, appliance, device or method just because it has been applied in huge numbers, many people use it, and it seems logical; all these in the absence of evidence or even worse, in the presence of evidence questioning its efficiency. In the era of delirious pace of information generation from various resources and the social media, the clinician should rely on valid, independent and unbiased resource of evidence, which has been reviewed by journals, which adhere to excellent practices in handling scientific information. The Korean Journal of Orthodontics is a world renown periodical, hosting high quality articles adhering to excellence practices in dissemination of scientific information, and has achieved impressive ratings and impact factor already years ago. With an international outreach including the addition of Associate editors from 7 countries on 4 continents, its improved manuscript handling times, new features such as invited narrative reviews from experts, the KJO would pave the way for a stellar transformation of its profile. It is my intention to build on the long tradition and efforts of the previous Editor Prof. Hyoung-Seon Baik and associate editors who have brought a journal from its conception to a leading status in the field. The prespISSN 2234-7518 eISSN 2005-372X
{"title":"From eminence to evidence and back to presence: lessons learned from the evolution of scientific information dissemination and the case of KJO","authors":"T. Eliades","doi":"10.4041/kjod.2022.52.3.161","DOIUrl":"https://doi.org/10.4041/kjod.2022.52.3.161","url":null,"abstract":"The last 2 decades have witnessed an array of unprecedented developments in the publishing and managing scientific information and concomitantly to the oral health care practices. From the well-established model of evidence-based principles, which replaced the largely anecdotal evidence or simplified research approaches seen in our field in the 1970’s and 1980’s, we have gone into an era where the focus has been switched from evidence to highlighted and constant presence. The objective is now the bombardment of the practicing health care provider with information from many resources to maintain a constant interest: advertisement to lay persons to build a pressure for the use of specific appliances; organization of corporate symposia and pseudoscientific periodicals run by the industry; abundance of cases, materials, demonstration videos and statements on social media; paid speakers in symposia; key opinion specialists; the list in long... Despite its marketing and corporate advantages and profits, this practice may have unfavorable consequences for the outcome of treatment provided to patients, since it is based on the number and frequency of the repetition of a scientific information as opposed to quality reviewing. Unfortunately, democratization of the scientific information dissemination is not always valid and may have unpredictable sequalae. The ancient Greek proverb oὐκ ἐν τῷ πολλῷ τὸ εὖ (the good is not in the quantity) finds a suitable application in cases where everybody uses a therapeutic mode, appliance, device or method just because it has been applied in huge numbers, many people use it, and it seems logical; all these in the absence of evidence or even worse, in the presence of evidence questioning its efficiency. In the era of delirious pace of information generation from various resources and the social media, the clinician should rely on valid, independent and unbiased resource of evidence, which has been reviewed by journals, which adhere to excellent practices in handling scientific information. The Korean Journal of Orthodontics is a world renown periodical, hosting high quality articles adhering to excellence practices in dissemination of scientific information, and has achieved impressive ratings and impact factor already years ago. With an international outreach including the addition of Associate editors from 7 countries on 4 continents, its improved manuscript handling times, new features such as invited narrative reviews from experts, the KJO would pave the way for a stellar transformation of its profile. It is my intention to build on the long tradition and efforts of the previous Editor Prof. Hyoung-Seon Baik and associate editors who have brought a journal from its conception to a leading status in the field. The prespISSN 2234-7518 eISSN 2005-372X","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2022-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83856953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Objective This cross-sectional study aimed to investigate the characteristics of malocclusions in scoliotic patients through clinical examinations. Methods Fifty-eight patients with idiopathic scoliosis (IS) and 48 patients with congenital scoliosis (CS) participated in the study. A randomly selected group of 152 orthopedically healthy children served as the control group. Standardized orthodontic and orthopedic examination protocols were used to record the occlusal patterns and type of scoliosis. Assessments were made by three experienced orthodontists and a spinal surgery team. The differences in the frequency distribution of occlusal patterns were evaluated by the chi-squared test. Results In comparison with patients showing IS, patients with CS showed a higher incidence of Cobb angle ≥ 45° (p = 0.020) and included a higher proportion of patients receiving surgical treatments (p < 0.001). The distribution of the Angle Class II subgroup was significantly higher in the IS (p < 0.001) and CS (p = 0.031) groups than in the control group. In comparison with the healthy controls, the CS and IS groups showed significantly higher (p < 0.05) frequencies of asymmetric molar and asymmetric canine relationships, upper and lower middle line deviations, anterior deep overbite, unilateral posterior crossbite, and canted occlusal plane, with the frequencies being especially higher in CS patients and to a lesser extent in IS patients. Conclusions Patients with scoliosis showed a high frequency of malocclusions, which were most obvious in patients with CS.
{"title":"Occlusal deviations in adolescents with idiopathic and congenital scoliosis","authors":"Hao Zhang, Jingbo Ma, Zhicheng Zhang, Ya-fei Feng, Chuan Cai, Chao Wang","doi":"10.4041/kjod21.259","DOIUrl":"https://doi.org/10.4041/kjod21.259","url":null,"abstract":"Objective This cross-sectional study aimed to investigate the characteristics of malocclusions in scoliotic patients through clinical examinations. Methods Fifty-eight patients with idiopathic scoliosis (IS) and 48 patients with congenital scoliosis (CS) participated in the study. A randomly selected group of 152 orthopedically healthy children served as the control group. Standardized orthodontic and orthopedic examination protocols were used to record the occlusal patterns and type of scoliosis. Assessments were made by three experienced orthodontists and a spinal surgery team. The differences in the frequency distribution of occlusal patterns were evaluated by the chi-squared test. Results In comparison with patients showing IS, patients with CS showed a higher incidence of Cobb angle ≥ 45° (p = 0.020) and included a higher proportion of patients receiving surgical treatments (p < 0.001). The distribution of the Angle Class II subgroup was significantly higher in the IS (p < 0.001) and CS (p = 0.031) groups than in the control group. In comparison with the healthy controls, the CS and IS groups showed significantly higher (p < 0.05) frequencies of asymmetric molar and asymmetric canine relationships, upper and lower middle line deviations, anterior deep overbite, unilateral posterior crossbite, and canted occlusal plane, with the frequencies being especially higher in CS patients and to a lesser extent in IS patients. Conclusions Patients with scoliosis showed a high frequency of malocclusions, which were most obvious in patients with CS.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86363632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Suh, Bella Shen Garnett, Kimberly Mahood, Noor Mahjoub, R. Boyd, H. Oh
Objective The purpose of this study was to examine the effectiveness and mechanism of clear aligner therapy for the correction of anterior open bite in adult nonextraction cases. Methods Sixty-nine adult patients with anterior open bite were enrolled and classified into Angle’s Class I, II, and III groups. Fifty patients presented with skeletal open bite (mandibular plane angle [MPA] ≥ 38°), whereas 19 presented with dental open bite. Fifteen cephalometric landmarks were identified before (T1) and after (T2) treatment. The magnitudes of planned and actual movements of the incisors and molars were calculated. Results Positive overbite was achieved in 94% patients, with a mean final overbite of 1.1 ± 0.8 mm. The mean change in overbite was 3.3 ± 1.4 mm. With clear aligners alone, 0.36 ± 0.58 mm of maxillary molar intrusion was achieved. Compared with the Class I group, the Class II group showed greater maxillary molar intrusion and MPA reduction. The Class III group showed greater mandibular incisor extrusion with no significant vertical skeletal changes. Conclusions Clear aligners can be effective in controlling the vertical dimension and correcting mild to moderate anterior open bite in adult nonextraction cases. The treatment mechanism for Class III patients significantly differed from that for Class I and Class II patients. Maxillary incisor extrusion in patients with dental open bite and MPA reduction with mandibular incisor extrusion in patients with skeletal open bite are the most significant contributing factors for open bite closure.
{"title":"Treatment of anterior open bites using non-extraction clear aligner therapy in adult patients","authors":"H. Suh, Bella Shen Garnett, Kimberly Mahood, Noor Mahjoub, R. Boyd, H. Oh","doi":"10.4041/kjod21.180","DOIUrl":"https://doi.org/10.4041/kjod21.180","url":null,"abstract":"Objective The purpose of this study was to examine the effectiveness and mechanism of clear aligner therapy for the correction of anterior open bite in adult nonextraction cases. Methods Sixty-nine adult patients with anterior open bite were enrolled and classified into Angle’s Class I, II, and III groups. Fifty patients presented with skeletal open bite (mandibular plane angle [MPA] ≥ 38°), whereas 19 presented with dental open bite. Fifteen cephalometric landmarks were identified before (T1) and after (T2) treatment. The magnitudes of planned and actual movements of the incisors and molars were calculated. Results Positive overbite was achieved in 94% patients, with a mean final overbite of 1.1 ± 0.8 mm. The mean change in overbite was 3.3 ± 1.4 mm. With clear aligners alone, 0.36 ± 0.58 mm of maxillary molar intrusion was achieved. Compared with the Class I group, the Class II group showed greater maxillary molar intrusion and MPA reduction. The Class III group showed greater mandibular incisor extrusion with no significant vertical skeletal changes. Conclusions Clear aligners can be effective in controlling the vertical dimension and correcting mild to moderate anterior open bite in adult nonextraction cases. The treatment mechanism for Class III patients significantly differed from that for Class I and Class II patients. Maxillary incisor extrusion in patients with dental open bite and MPA reduction with mandibular incisor extrusion in patients with skeletal open bite are the most significant contributing factors for open bite closure.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82938063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Kwon, Sun-Hyung Park, Hoi-In Jung, Woo-Chan Hwang, Y. Choi, C. Chung, Kyung-Ho Kim
Objective The objectives of this study were to compare the time-dependent changes in occlusal contact area (OCA) and bite force (BF) of the deviated and non-deviated sides in mandibular prognathic patients with mandibular asymmetry before and after orthognathic surgery and investigate the factors associated with the changes in OCA and BF on each side. Methods The sample consisted of 67 patients (33 men and 34 women; age range 15–36 years) with facial asymmetry who underwent 2-jaw orthognathic surgery. OCA and BF were taken before presurgical orthodontic treatment, within 1 month before surgery, and 1 month, 3 months, 6 months, 1 year, and 2 years after surgery. OCA and BF were measured using the Dental Prescale System. Results The OCA and BF decreased gradually before surgery and increased after surgery on both sides. The OCA and BF were significantly greater on the deviated side than on the non-deviated side before surgery, and there was no difference after surgery. According to the linear mixed-effect model, only the changes in the mandibular plane angle had a significant effect on BF (p < 0.05). Conclusions There was a difference in the amount of the OCA and BF between the deviated and non-deviated sides before surgery. The change in mandibular plane angle affects the change, especially on the non-deviated side, during the observation period.
{"title":"Comparison of the bite force and occlusal contact area of the deviated and non-deviated sides after intraoral vertical ramus osteotomy in skeletal Class III patients with mandibular asymmetry: Two-year follow-up","authors":"H. Kwon, Sun-Hyung Park, Hoi-In Jung, Woo-Chan Hwang, Y. Choi, C. Chung, Kyung-Ho Kim","doi":"10.4041/kjod21.236.","DOIUrl":"https://doi.org/10.4041/kjod21.236.","url":null,"abstract":"Objective The objectives of this study were to compare the time-dependent changes in occlusal contact area (OCA) and bite force (BF) of the deviated and non-deviated sides in mandibular prognathic patients with mandibular asymmetry before and after orthognathic surgery and investigate the factors associated with the changes in OCA and BF on each side. Methods The sample consisted of 67 patients (33 men and 34 women; age range 15–36 years) with facial asymmetry who underwent 2-jaw orthognathic surgery. OCA and BF were taken before presurgical orthodontic treatment, within 1 month before surgery, and 1 month, 3 months, 6 months, 1 year, and 2 years after surgery. OCA and BF were measured using the Dental Prescale System. Results The OCA and BF decreased gradually before surgery and increased after surgery on both sides. The OCA and BF were significantly greater on the deviated side than on the non-deviated side before surgery, and there was no difference after surgery. According to the linear mixed-effect model, only the changes in the mandibular plane angle had a significant effect on BF (p < 0.05). Conclusions There was a difference in the amount of the OCA and BF between the deviated and non-deviated sides before surgery. The change in mandibular plane angle affects the change, especially on the non-deviated side, during the observation period.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2022-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77155383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号