Korean Journal of Orthodontics最新文献_第5页

Accuracy of orthodontic movements with 3D printed aligners: A prospective observational pilot study. 使用 3D 打印矫治器进行正畸运动的准确性：前瞻性观察试点研究。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2024-05-25 Epub Date: 2024-04-08 DOI: 10.4041/kjod23.268

Marco Migliorati, Sara Drago, Tommaso Castroflorio, Paolo Pesce, Giovanni Battista, Alessandra Campobasso, Giorgio Gastaldi, Filippo Forin Valvecchi, Anna De Mari

{"title":"Accuracy of orthodontic movements with 3D printed aligners: A prospective observational pilot study.","authors":"Marco Migliorati, Sara Drago, Tommaso Castroflorio, Paolo Pesce, Giovanni Battista, Alessandra Campobasso, Giorgio Gastaldi, Filippo Forin Valvecchi, Anna De Mari","doi":"10.4041/kjod23.268","DOIUrl":"10.4041/kjod23.268","url":null,"abstract":"Objective: Owing to the availability of 3D software, scanners, and printers, clinicians are encouraged to produce in-office aligners. Recently, a new directprinting resin (Tera Harz TC-85DAC) has been introduced. Studies on its mechanical characteristics and biological effects have been published; however, evidence on its efficacy in orthodontic treatment remains scarce. This pilot study aimed to investigate the accuracy of teeth movement achieved with directprinted aligners.Methods: Seventeen patients (eight males and nine females) with a mean age of 27.67 ± 8.95 years, presenting with dental rotations < 30° and spaces/crowding < 5 mm, were recruited for this study. The teeth movement was planned starting from a T0 digital dental cast. The 3D direct-printed aligners were produced using Tera Harz TC-85DAC resin. Once the orthodontic treatment was completed, a final digital cast was obtained (T1). The planned teeth positions were then superimposed onto the T0 and T1 digital models. The differences between the programmed movements and the achieved overall torque, tip, rotation, and transverse dimensions were assessed using the paired t test or Wilcoxon's signed rank test.Results: The overall accuracies for torque, tip, and rotation were 67.6%, 64.2%, and 72.0%, respectively. The accuracy of the change in transverse diameter was 99.6%.Conclusions: Within the limits of the present pilot study (difficulties with abnormally shaped teeth and use of attachments), it can be concluded that 3D printed aligners can be successfully printed in-house and utilized for mildly crowded cases, with a comparable accuracy of tooth movement to that of other aligners.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"54 3","pages":"160-170"},"PeriodicalIF":1.9,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11129935/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141155829","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}

引用次数: 0

Orthodontic diagnosis rates based on panoramic radiographs in children aged 6-8 years: A retrospective study. 基于全景 X 光片的 6-8 岁儿童正畸诊断率：回顾性研究

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2024-05-25 Epub Date: 2024-04-30 DOI: 10.4041/kjod24.004

You-Sun Lee, Ji-Yeon Lee

{"title":"Orthodontic diagnosis rates based on panoramic radiographs in children aged 6-8 years: A retrospective study.","authors":"You-Sun Lee, Ji-Yeon Lee","doi":"10.4041/kjod24.004","DOIUrl":"10.4041/kjod24.004","url":null,"abstract":"Objective: This study aimed to retrospectively analyze the prevalence of orthodontic problems and the proportion of patients who underwent orthodontic diagnosis among children aged 6 (n = 300), 7 (n = 400), and 8 (n = 400) years who had undergone panoramic radiography.Methods: Children were divided into five groups according to their chief complaint and consultation: conservative dentistry, oral and maxillofacial surgery, orthodontics, periodontics, and prosthodontics). Chief complaints investigated included first molar eruption, lack of space for incisor eruption, frequency of eruption problems, lack of space, impaction, supernumerary teeth (SNT), missing teeth, and ectropion eruption. The number of patients whose chief complaint was not related to orthodontics but had dental problems requiring orthodontic treatment was counted. The proportion of patients with orthodontic problems who received an orthodontic diagnosis was also examined.Results: Dental trauma and SNT were the most frequent chief complaints among the children. The proportion of patients with orthodontic problems increased with age. However, the orthodontic diagnosis rates based on panoramic radiographs among children aged 6, 7, 8 years were only 1.5% (6 years) and 23% (7 and 8 years).Conclusions: Accurate information should be provided to patient caregivers to correct misconceptions regarding the appropriateness of delaying orthodontic examination until permanent dentition is established.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"54 3","pages":"185-195"},"PeriodicalIF":1.9,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11129934/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141155860","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}

引用次数: 0

Reducing the quality of our evidence base by publishing at any cost. 不惜代价出版，降低证据基础的质量。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2024-05-25 Epub Date: 2024-05-20 DOI: 10.4041/kjod54.0000

Theodore Eliades, Rolf G Behrents, Steven J Lindauer, David P Rice

引用次数: 0

Three-dimensional analysis of the positional relationship between the dentition and basal bone region in patients with skeletal Class I and Class II malocclusion with mandibular retrusion. 下颌后缩Ⅰ类和Ⅱ类骨骼错合畸形患者牙列和基底骨区域位置关系的三维分析。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2024-05-25 Epub Date: 2024-04-18 DOI: 10.4041/kjod23.262

Jun Wan, Xi Wen, Jing Geng, Yan Gu

{"title":"Three-dimensional analysis of the positional relationship between the dentition and basal bone region in patients with skeletal Class I and Class II malocclusion with mandibular retrusion.","authors":"Jun Wan, Xi Wen, Jing Geng, Yan Gu","doi":"10.4041/kjod23.262","DOIUrl":"10.4041/kjod23.262","url":null,"abstract":"Objective: This study aimed to determine the maxillary and mandibular basal bone regions and explore the three-dimensional positional relationship between the dentition and basal bone regions in patients with skeletal Class I and Class II malocclusions with mandibular retrusion.Methods: Eighty patients (40 each with Class I and Class II malocclusion) were enrolled. Maxillary and mandibular basal bone regions were determined using cone-beam computed tomography images. To measure the relationship between the dentition and basal bone region, the root position and root inclination were calculated using the coordinates of specific fixed points by a computer program written in Python.Results: In the Class II group, the mandibular anterior teeth inclined more labially (P < 0.05), with their apices positioned closer to the external boundary. The apex of the maxillary anterior root was positioned closer to the external boundary in both groups. Considering the molar region, the maxillary first molars tended to be more lingually inclined in females (P = 0.037), whereas the mandibular first molars were significantly more labially inclined in the Class II group (P < 0.05).Conclusions: Mandibular anterior teeth in Class II malocclusion exhibit a compensatory labial inclination trend with the crown and apex relative to the basal bone region when mandibular retrusion occurs. Moreover, as the root apices of the maxillary anterior teeth are much closer to the labial side in Class I and Class II malocclusion, the range of movement at the root apex should be limited to avoid extensive labial movement.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"54 3","pages":"171-184"},"PeriodicalIF":1.9,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11129933/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141155863","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}

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READER'S FORUM. 读者论坛。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2024-05-25 DOI: 10.4041/kjod54.0003RF

Sung-Hoon Lim

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Treatment outcome and long-term stability of orthognathic surgery for facial asymmetry: A systematic review and meta-analysis. 正颌手术治疗面部不对称的疗效和长期稳定性：系统回顾和荟萃分析。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2024-03-25 Epub Date: 2024-01-26 DOI: 10.4041/kjod23.194

Yoon-Ji Kim, Moon-Young Kim, Nayansi Jha, Min-Ho Jung, Yong-Dae Kwon, Ho Gyun Shin, Min Jung Ko, Sang Ho Jun

{"title":"Treatment outcome and long-term stability of orthognathic surgery for facial asymmetry: A systematic review and meta-analysis.","authors":"Yoon-Ji Kim, Moon-Young Kim, Nayansi Jha, Min-Ho Jung, Yong-Dae Kwon, Ho Gyun Shin, Min Jung Ko, Sang Ho Jun","doi":"10.4041/kjod23.194","DOIUrl":"10.4041/kjod23.194","url":null,"abstract":"Objective: : This systematic review aimed to provide a comparative analysis of the treatment outcomes, including hard and soft tissues, postoperative stability, temporomandibular disorders (TMD), and quality of life (QoL), in patients with facial asymmetry who underwent orthognathic surgery.Methods: : The primary objective was to address the question, \"How do different factors related to surgery affect the outcomes and stability of orthognathic surgery in the correction of facial asymmetry?\" A meta-analysis was conducted on the outcome parameters, such as skeletal, dental, and soft tissue symmetry, TMD, QoL, and relapse, using the Hartung-Knapp-Sidik-Jonkman method for random-effects models. Subgroup analyses were conducted considering surgery-related factors such as surgical techniques (one-jaw vs. two-jaw), use of the surgery-first approach, utilization of computer simulation, and analytical methods employed to evaluate asymmetry (2D vs. 3D).Results: : Forty-nine articles met the inclusion criteria. The meta-analysis demonstrated a significant improvement in the symmetry of hard and soft tissues. The subgroup analysis indicated that the treatment outcomes showed significant improvement, regardless of the factors related to surgery. Changes in TMD signs and symptoms varied according to the surgical technique used. Quality of life improved in the facial, oral, and social domains. Skeletal relapse was observed during the follow-up.Conclusions: : Our findings support the positive outcomes of orthognathic surgery in the treatment of facial asymmetry in terms of skeletal and soft tissue improvements, stability, relief of TMD symptoms, and enhancement of QoL. However, most of the included studies showed a low certainty of evidence and high heterogeneity.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"54 2","pages":"89-107"},"PeriodicalIF":1.9,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10973727/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140295253","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}

引用次数: 0

Is three-piece maxillary segmentation surgery a stable procedure? 三件式上颌骨分段手术是一种稳定的手术吗？

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2024-03-25 Epub Date: 2024-03-08 DOI: 10.4041/kjod23.166

Renata Mayumi Kato, João Roberto Gonçalves, Jaqueline Ignácio, Larry Wolford, Patricia Bicalho de Mello, Julianna Parizotto, Jonas Bianchi

{"title":"Is three-piece maxillary segmentation surgery a stable procedure?","authors":"Renata Mayumi Kato, João Roberto Gonçalves, Jaqueline Ignácio, Larry Wolford, Patricia Bicalho de Mello, Julianna Parizotto, Jonas Bianchi","doi":"10.4041/kjod23.166","DOIUrl":"10.4041/kjod23.166","url":null,"abstract":"Objective: : The number of three-piece maxillary osteotomies has increased over the years; however, the literature remains controversial. The objective of this study was to evaluate the skeletal stability of this surgical modality compared with that of one-piece maxillary osteotomy.Methods: : This retrospective cohort study included 39 individuals who underwent Le Fort I maxillary osteotomies and were divided into two groups: group 1 (three pieces, n = 22) and group 2 (one piece, n = 17). Three cone-beam computed tomography scans from each patient (T1, pre-surgical; T2, post-surgical; and T3, follow-up) were used to evaluate the three-dimensional skeletal changes.Results: : The differences within groups were statistically significant only for group 1 in terms of surgical changes (T2-T1) with a mean difference in the canine region of 3.09 mm and the posterior region of 3.08 mm. No significant differences in surgical stability were identified between or within the groups. The mean values of the differences between groups were 0.05 mm (posterior region) and -0.39 mm (canine region).Conclusions: : Our findings suggest that one- and three-piece maxillary osteotomies result in similar post-surgical skeletal stability.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"54 2","pages":"128-135"},"PeriodicalIF":1.9,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10973729/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140295250","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}

引用次数: 0

Three-dimensional finite element analysis on the effects of maxillary protraction with an individual titanium plate at multiple directions and locations. 对使用单个钛板在多个方向和位置进行上颌骨牵引的效果进行三维有限元分析。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2024-03-25 Epub Date: 2024-02-14 DOI: 10.4041/kjod23.217

Fan Wang, Qiao Chang, Shuran Liang, Yuxing Bai

{"title":"Three-dimensional finite element analysis on the effects of maxillary protraction with an individual titanium plate at multiple directions and locations.","authors":"Fan Wang, Qiao Chang, Shuran Liang, Yuxing Bai","doi":"10.4041/kjod23.217","DOIUrl":"10.4041/kjod23.217","url":null,"abstract":"Objective: : A three-dimensional-printed individual titanium plate was applied for maxillary protraction to eliminate side effects and obtain the maximum skeletal effect. This study aimed to explore the stress distribution characteristics of sutures during maxillary protraction using individual titanium plates in various directions and locations.Methods: : A protraction force of 500 g per side was applied at forward and downward angles between 0° and 60° with respect to the Frankfort horizontal plane, after which the titanium plate was moved 2 and 4 mm upward and downward, respectively. Changes in sutures with multiple protraction directions and various miniplate heights were quantified to analyze their impact on the maxillofacial bone.Results: : Protraction angle of 0-30° with respect to the Frankfort horizontal plane exhibited a tendency for counterclockwise rotation in the maxilla. At a 40° protraction angle, translational motion was observed in the maxilla, whereas protraction angles of 50-60° tended to induce clockwise rotation in the maxilla. Enhanced protraction efficiency at the lower edge of the pyriform aperture was associated with increased height of individual titanium plates.Conclusions: : Various protraction directions are suitable for patients with different types of vertical bone surfaces. Furthermore, when the titanium plate was positioned lower, the protraction force exhibited an increase.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"54 2","pages":"108-116"},"PeriodicalIF":1.9,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10973726/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140295252","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}

引用次数: 0

Cone-beam computed tomographic evaluation of mandibular incisor alveolar bone changes for the intrusion arch technique: A retrospective cohort research. 锥形束计算机断层扫描评估下颌切牙牙槽骨对入侵拱形技术的改变：回顾性队列研究

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2024-03-25 Epub Date: 2024-02-28 DOI: 10.4041/kjod23.173

Lin Lu, Jiaping Si, Zhikang Wang, Xiaoyan Chen

{"title":"Cone-beam computed tomographic evaluation of mandibular incisor alveolar bone changes for the intrusion arch technique: A retrospective cohort research.","authors":"Lin Lu, Jiaping Si, Zhikang Wang, Xiaoyan Chen","doi":"10.4041/kjod23.173","DOIUrl":"10.4041/kjod23.173","url":null,"abstract":"Objective: : Alveolar bone loss is a common adverse effect of intrusion treatment. Mandibular incisors are prone to dehiscence and fenestrations as they suffer from thinner alveolar bone thickness.Methods: : Thirty skeletal class II patients treated with mandibular intrusion arch therapy were included in this study. Lateral cephalograms and cone-beam computed tomography images were taken before treatment (T1) and immediately after intrusion arch removal (T2) to evaluate the tooth displacement and the alveolar bone changes. Pearson's and Spearman's correlation was used to identify risk factors of alveolar bone loss during the intrusion treatment.Results: : Deep overbite was successfully corrected (P < 0.05), accompanied by mandibular incisor proclination (P < 0.05). There were no statistically significant change in the true incisor intrusion (P > 0.05). The labial and lingual vertical alveolar bone levels showed a significant decrease (P < 0.05). The alveolar bone is thinning in the labial crestal area and lingual apical area (P < 0.05); accompanied by thickening in the labial apical area (P < 0.05). Proclined incisors, non-extraction treatment, and increased A point-nasion-B point (ANB) degree were positively correlated with alveolar bone loss.Conclusions: : While the mandibular intrusion arch effectively corrected the deep overbite, it did cause some unwanted incisor labial tipping/flaring. During the intrusion treatment, the alveolar bone underwent corresponding changes, which was thinning in the labial crestal area and thickening in the labial apical area vice versa. And increased axis change of incisors, non-extraction treatment, and increased ANB were identified as risk factors for alveolar bone loss in patients with mandibular intrusion therapy.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":" ","pages":"79-88"},"PeriodicalIF":1.9,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10973728/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139984501","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}

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READER'S FORUM. 读者论坛。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2024-03-25 DOI: 10.4041/kjod54.0002RF

Harim Kim

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