Korean Journal of Orthodontics最新文献_第7页

Construction reproducibility of a composite tooth model composed of an intraoral-scanned crown and a cone-beam computed tomography-scanned root. 由口内扫描牙冠和锥束计算机断层扫描牙根组成的复合牙模型的构建可重复性。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2020-07-25 DOI: 10.4041/kjod.2020.50.4.229

Seung-Weon Lim, Ryu-Jin Moon, Min-Seok Kim, Min-Hee Oh, Kyung-Min Lee, Hyeon-Shik Hwang, Tae-Woo Kim, Seung-Hak Baek, Jin-Hyoung Cho

{"title":"Construction reproducibility of a composite tooth model composed of an intraoral-scanned crown and a cone-beam computed tomography-scanned root.","authors":"Seung-Weon Lim, Ryu-Jin Moon, Min-Seok Kim, Min-Hee Oh, Kyung-Min Lee, Hyeon-Shik Hwang, Tae-Woo Kim, Seung-Hak Baek, Jin-Hyoung Cho","doi":"10.4041/kjod.2020.50.4.229","DOIUrl":"https://doi.org/10.4041/kjod.2020.50.4.229","url":null,"abstract":"Objective: To evaluate the construction reproducibility of a composite tooth model (CTM) composed of an intraoral-scanned crown and a cone-beam computed tomography (CBCT)-scanned root.Methods: The study assessed 240 teeth (30 central incisors, 30 canines, 30 second premolars, and 30 first molars in the maxillary and mandibular arches) from 15 young adult patients whose pre-treatment intraoral scan and CBCT were available. Examiner-Reference (3 years' experience in CTM construction) and Examiners-A and Examiner-B (no experience) constructed the individual CTMs independently by performing the following steps: image acquisition and processing into a three-dimensional model, integration of intraoral-scanned crowns and CBCT-scanned teeth, and replacement of the CBCT-scanned crown with the intraoral-scanned crown. The tooth axis angle in terms of mesiodistal angulation and buccolingual inclination of the CTMs constructed by the three examiners were measured. To assess the construction reproducibility of CTMs, intraclass correlation coefficient (ICC) assessments were performed.Results: The ICC values of mesiodistal angulation and buccolingual inclination among the 3 examiners showed excellent agreement (0.950-0.992 and 0.965-0.993; 0.976-0.994 and 0.973-0.995 in the maxillary and mandibular arches, respectively).Conclusions: The CTM showed excellent construction reproducibility in mesiodistal angulation and buccolingual inclination regardless of the construction skill and experience levels of the examiners.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"50 4","pages":"229-237"},"PeriodicalIF":1.9,"publicationDate":"2020-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/10/7c/KJOD-50-229.PMC7369385.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38131419","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: 4

Correction to: Changes in maximum lip-closing force after extraction and nonextraction orthodontic treatments. 矫正:拔牙和非拔牙正畸治疗后最大闭唇力的变化。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2020-07-25 DOI: 10.4041/kjod.2020.50.4.290

Tae-Hyun Choi, So-Hyun Kim, Cheul Kim, Yoon-Ah Kook, Brent E Larson, Nam-Ki Lee

引用次数: 0

Effects of the long-term use of maxillary protraction facemasks with skeletal anchorage on pharyngeal airway dimensions in growing patients with cleft lip and palate. 长期使用颌骨牵引面罩对生长型唇腭裂患者咽气道尺寸的影响。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2020-07-25 DOI: 10.4041/kjod.2020.50.4.238

Jung-Eun Kim, Sunjin Yim, Jin-Young Choi, Sukwha Kim, Su-Jung Kim, Seung-Hak Baek

{"title":"Effects of the long-term use of maxillary protraction facemasks with skeletal anchorage on pharyngeal airway dimensions in growing patients with cleft lip and palate.","authors":"Jung-Eun Kim, Sunjin Yim, Jin-Young Choi, Sukwha Kim, Su-Jung Kim, Seung-Hak Baek","doi":"10.4041/kjod.2020.50.4.238","DOIUrl":"https://doi.org/10.4041/kjod.2020.50.4.238","url":null,"abstract":"Objective: To investigate the effects of the long-term use of a maxillary protraction facemask with miniplate (FM-MP) on pharyngeal airway dimensions in growing patients with cleft lip and palate (CLP).Methods: The study included 24 boys with CLP (mean age, 12.2 years; mean duration of FM-MP therapy, 4.9 years), divided into two groups according to the amount of A point advancement to the vertical reference plane (VRP): Group 1, > 4 mm; Group 2, < 2 mm; n = 12/group. After evaluating the skeletodental and airway variables using lateral cephalograms acquired before and after FM-MP therapy, statistical analyses were performed.Results: Group 1 showed greater forward and downward displacements of the posterior maxilla (posterior nasal spine [PNS]-horizontal reference plane [HRP]; PNSVRP), greater increase in ANB, more forward tongue position (tongue tip-Pt vertical line to Frankfort horizontal plane), and greater increase in the oropharynx (superior posterior airway space [SPAS]; middle airway space [MAS]) and upper nasopharynx (PNS-adenoid2) than did Group 2. While maxillary advancement (A-VRP and PNS-VRP) correlated with increases in SPAS, MAS, and PNS-adenoid2, downward displacement of the PNS (PNS-HRP) correlated with increases in SPAS, MAS, PNSadenoid1, and PNS-adenoid2, and with a decrease in vertical airway length (VAL). Mandibular forward displacement and decrease in mandibular plane correlated with increases in MAS.Conclusions: FM-MP therapy had positive effects on the oropharyngeal and nasopharyngeal airway spaces without increases in VAL in Group 1 rather than in Group 2. However, further validation using an untreated control group is necessary.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"50 4","pages":"238-248"},"PeriodicalIF":1.9,"publicationDate":"2020-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/81/07/KJOD-50-238.PMC7369382.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38131420","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: 4

Three-dimensional assessment of nasal changes after maxillary advancement with impaction using stereophotogrammetry. 使用立体摄影测量法对上颌骨前移后的鼻腔变化进行三维评估。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2020-07-25 DOI: 10.4041/kjod.2020.50.4.249

Gokhan Coban, Ibrahim Yavuz, Busra Karadas, Ahmet Emin Demirbas

{"title":"Three-dimensional assessment of nasal changes after maxillary advancement with impaction using stereophotogrammetry.","authors":"Gokhan Coban, Ibrahim Yavuz, Busra Karadas, Ahmet Emin Demirbas","doi":"10.4041/kjod.2020.50.4.249","DOIUrl":"10.4041/kjod.2020.50.4.249","url":null,"abstract":"Objective: To evaluate the changes in the nose in three dimensions after Le Fort I osteotomy in patients with skeletal Class III malocclusion.Methods: The subjects were 40 adult patients (20 females and 20 males; mean age, 20.3 ± 3.0 years; range, 17.0 to 31.1 years) who underwent one-piece Le Fort I osteotomy with maxillary advancement and impaction treatment for maxillary hypoplasia. The mean maxillary advancement was 4.56 ± 1.34 mm, and the mean maxillary impaction was 2.03 ± 1.04 mm. Stereophotogrammetry was used to acquire three-dimensional images before and at least 6 months after surgery.Results: Alare (Al) and alare curvature (Ac) points had moved vertically and anterolaterally postoperatively. A significant increase was observed in the nasal ala width and alar base width, and no changes were noted in the columellar length, nasolabial angle, and nasal area. There was a significant relationship between maxillary impaction and nasal ala width and horizontal and sagittal positions of the bilateral Al and Ac. The only relationship found was between maxillary advancement and postoperative sagittal location of the subnasale and pronasale.Conclusions: Nasal soft tissues were highly affected by the vertical movement of the maxilla; however, the soft tissue responses were individual-dependent.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"50 4","pages":"249-257"},"PeriodicalIF":1.9,"publicationDate":"2020-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/f1/0b/KJOD-50-249.PMC7369387.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38131421","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

Biomechanical considerations for uprighting impacted mandibular molars. 下颌阻生磨牙矫直的生物力学考虑。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2020-07-25 DOI: 10.4041/kjod.2020.50.4.268

Yukiko Morita, Yoshiyuki Koga, Tuan Anh Nguyen, Noriaki Yoshida

{"title":"Biomechanical considerations for uprighting impacted mandibular molars.","authors":"Yukiko Morita, Yoshiyuki Koga, Tuan Anh Nguyen, Noriaki Yoshida","doi":"10.4041/kjod.2020.50.4.268","DOIUrl":"https://doi.org/10.4041/kjod.2020.50.4.268","url":null,"abstract":"This case report demonstrates two different uprighting mechanics separately applied to mesially tipped mandibular first and second molars. The biomechanical considerations for application of these mechanisms are also discussed. For repositioning of the first molar, which was severely tipped and deeply impacted, a novel cantilever mechanics was used. The molar tube was bonded in the buccolingual direction to facilitate insertion of a cantilever from the buccal side. By twisting the distal end of the cantilever, sufficient uprighting moment was generated. The mesial end of the cantilever was hooked over the miniscrew placed between the canine and first premolar, which could prevent exertion of an intrusive force to the anterior portion of the dentition as a side effect. For repositioning of the second molar, an uprighting mechanics using a compression force with two step bends incorporated into a nickel-titanium archwire was employed. This generated an uprighting moment as well as a distal force acting on the tipped second molar to regain the lost space for the first molar and bring it into its normal position. This epoch-making uprighting mechanics could also minimize the extrusion of the molar, thereby preventing occlusal interference by increasing interocclusal clearance between the inferiorly placed two step bends and the antagonist tooth. Consequently, the two step bends could help prevent occlusal interference. After 2 years and 11 months of active treatment, a desirable Class I occlusion was successfully achieved without permanent tooth extraction.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"50 4","pages":"268-277"},"PeriodicalIF":1.9,"publicationDate":"2020-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/35/35/KJOD-50-268.PMC7369381.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38131423","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: 10

Three-dimensional evaluation of the correlation between lip canting and craniofacial planes. 唇部倾斜与颅面平面相关性的三维评价。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2020-07-25 DOI: 10.4041/kjod.2020.50.4.258

Jun-Young Kim, Hee-Keun Park, Seung-Woo Shin, Jin Hoo Park, Hwi-Dong Jung, Young-Soo Jung

{"title":"Three-dimensional evaluation of the correlation between lip canting and craniofacial planes.","authors":"Jun-Young Kim, Hee-Keun Park, Seung-Woo Shin, Jin Hoo Park, Hwi-Dong Jung, Young-Soo Jung","doi":"10.4041/kjod.2020.50.4.258","DOIUrl":"https://doi.org/10.4041/kjod.2020.50.4.258","url":null,"abstract":"Objective: This study aimed to analyze the correlation of horizontal and sagittal planes used in two-dimensional diagnosis with lip canting by using threedimensional (3D) analysis.Methods: Fifty-two patients (25 men, 27 women; average age: 24 years) undergoing treatment for dentofacial deformity were enrolled. Computed tomography images were acquired, and digital imaging and communication in medicine files were reconstructed into a 3D virtual model wherein horizontal and sagittal craniofacial planes were measured. Subsequently, the correlations of lip canting with these horizontal and sagittal planes were investigated.Results: The mandibular symmetry plane, the occlusal plane, Camper's plane, the mandibular plane, Broadbent's plane, and the nasal axis plane were correlated with the amount of lip canting (Pearson's correlation coefficients: 0.761, 0.648, 0.556, 0.526, 0.438, and 0.406, respectively). Planes associated with the lower part of the face showed the strongest correlations; the strength of the correlations decreased in the midfacial and cranial regions. None of the planes showed statistically significant differences between patients with clinical lip canting (> 3°) and those without prominent lip canting.Conclusions: The findings of this study suggest that lip canting is strongly correlated with the mandibular symmetry plane, which includes menton deviation. This finding may have clinical implications with regard to the treatment of patients requiring correction of lip canting. Further studies are necessary for evaluating changes in lip canting after orthognathic surgery.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"50 4","pages":"258-267"},"PeriodicalIF":1.9,"publicationDate":"2020-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/0c/9c/KJOD-50-258.PMC7369386.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38131422","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: 1

Camouflage treatment of posterior bite collapse in a patient with skeletal asymmetry by using posterior maxillary segmental osteotomy. 上颌后节段截骨术治疗骨不对称患者后牙合塌陷1例。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2020-07-25 DOI: 10.4041/kjod.2020.50.4.278

Haitham Badr, Soo-Yeon Lee, Hong-Sik Park, Joo-Young Ohe, Yoon-Goo Kang, Hyo-Won Ahn

{"title":"Camouflage treatment of posterior bite collapse in a patient with skeletal asymmetry by using posterior maxillary segmental osteotomy.","authors":"Haitham Badr, Soo-Yeon Lee, Hong-Sik Park, Joo-Young Ohe, Yoon-Goo Kang, Hyo-Won Ahn","doi":"10.4041/kjod.2020.50.4.278","DOIUrl":"https://doi.org/10.4041/kjod.2020.50.4.278","url":null,"abstract":"Orthodontic treatment of posterior bite collapse due to early loss of molars and the consequent drift of adjacent teeth is complicated. When the posterior bite collapse occurs in patients with facial asymmetry, both transverse and vertical compensation are necessary for camouflage orthodontic treatment. In such cases, posterior maxillary segmental osteotomy (PMSO) can be an effective alternative procedure that simplifies the orthodontic treatment and shows long-term stability through dental compensation within the alveolar bone housing. This case report aimed to describe the orthodontic treatment of maxillary occlusal plane canting caused by severely extruded maxillary teeth in a patient with skeletal facial asymmetry that was corrected with PMSO along with protraction of the lower second molar to replace the space of the extracted first molar. The treatment duration was 18 months, and stable results were obtained after 2 years of retention.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"50 4","pages":"278-289"},"PeriodicalIF":1.9,"publicationDate":"2020-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/a3/20/KJOD-50-278.PMC7369388.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38131368","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

READER'S FORUM. 读者的论坛。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2020-07-25 DOI: 10.4041/kjod.2020.50.4.227

Seung-Youp Lee

引用次数: 0

Surgical approach and orthodontic treatment of mandibular condylar osteochondroma. 下颌髁突骨软骨瘤的手术入路及正畸治疗。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2020-05-25 DOI: 10.4041/kjod.2020.50.3.206

So Jin Yang, Nam Hyung Chung, Jong Ghee Kim, Young-Mi Jeon

{"title":"Surgical approach and orthodontic treatment of mandibular condylar osteochondroma.","authors":"So Jin Yang, Nam Hyung Chung, Jong Ghee Kim, Young-Mi Jeon","doi":"10.4041/kjod.2020.50.3.206","DOIUrl":"https://doi.org/10.4041/kjod.2020.50.3.206","url":null,"abstract":"Osteochondroma is a common benign tumor of bones, but it is rare in the mandibular condyle. With its outgrowth it manifests clinically as deviation of the mandible limitation of mouth opening, and facial asymmetry. After the tumor is diagnosed on the basis of clinical symptoms and radiographic examination including cone-beam computed tomography (CBCT) analysis, an appropriate surgery and treatment plan should be formulated. Herein, we present the case of a 44-year-old female patient who visited our dental hospital because her chin point had been deviating to the left side slowly but progressively over the last 3 years and she had difficulty masticating. Based on CBCT, she was diagnosed with skeletal Class III malocclusion accompanied by osteochondroma of the right mandibular condyle. Maxillary occlusal cant with the right side down was observed, but it was confirmed to be an extrusion of the molars associated with dental compensation. Therefore, after intrusion of the right molars with the use of temporary anchorage devices, sagittal split ramus osteotomy was used to remove the tumor and perform orthognathic surgery simultaneously. During 6 months after the surgery, continuous bone resorption and remodeling were observed in the condyle of the affected side, which led to a change in occlusion. During the postoperative orthodontic treatment, intrusive force and buccal torque were applied to the molars on the affected side, and a proper buccal overjet was created. After 18 months, CBCT revealed that the rate of bone absorption was continuously reduced, bone corticalization appeared, and good occlusion and a satisfying facial profile were achieved.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"50 3","pages":"206-215"},"PeriodicalIF":1.9,"publicationDate":"2020-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/11/19/KJOD-50-206.PMC7270933.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37994101","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: 3

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IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2020-05-25 DOI: 10.4041/kjod.2020.50.3.155

Seo-Rin Jeong, Hyein Kim

引用次数: 0