AJO-DO clinical companion最新文献_第3页

Is there still a role for the J-hook headgear appliance in contemporary orthodontics? J-hook头套在当代正畸学中还有作用吗？

AJO-DO clinical companion Pub Date : 2026-08-01 Epub Date: 2026-04-01 DOI: 10.1016/j.xaor.2026.03.006

Sergio Luiz Mota-Júnior, Maria Del Mar Diaz-Posso, Gil Guilherme Gasparello, Orlando Motohiro Tanaka, Antônio Carlos de Oliveira Ruellas

{"title":"Is there still a role for the J-hook headgear appliance in contemporary orthodontics?","authors":"Sergio Luiz Mota-Júnior, Maria Del Mar Diaz-Posso, Gil Guilherme Gasparello, Orlando Motohiro Tanaka, Antônio Carlos de Oliveira Ruellas","doi":"10.1016/j.xaor.2026.03.006","DOIUrl":"10.1016/j.xaor.2026.03.006","url":null,"abstract":"<div><div>The J-hook headgear appliance is a historically important extraoral device capable of delivering precise directional forces for anterior retraction, vertical control, and anchorage reinforcement. This case report presents the orthodontic management of a 26-year-4-month-old female patient with skeletal Class II malocclusion associated with mandibular retrusion, dentoalveolar biprotrusion, and a convex facial profile. A compensatory treatment plan involving maxillary first and mandibular second premolar extractions was selected. Maxillary canine and anterior retraction were performed using J-hook mechanics, with controlled force application combined with fixed appliance therapy, whereas mandibular space closure was achieved using a shoe-horn loop design to allow planned anchorage loss. After 24 months, treatment resulted in the successful correction of the Class II relationship, improved occlusal function, and achieved a straight facial profile. Five-year follow-up records confirmed long-term dental stability. This case report underscores that accurate diagnosis, proper application of directional force systems, and patient compliance are critical to achieving predictable outcomes. J-hook biomechanics, when integrated with well-controlled force vectors, remain a viable and effective option for the compensatory correction of Class II malocclusion in contemporary orthodontic practice, reinforcing the idea that mastery of biomechanics is more important than the choice of appliance.</div></div>","PeriodicalId":72140,"journal":{"name":"AJO-DO clinical companion","volume":"6 4","pages":"Pages 306-316"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148694732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Camouflage of hyperdivergent Class II malocclusion using 3 maxillary miniscrews and a mandibular intrusion arch 用3个上颌微钉和下颌侵入弓掩饰超发散II类错颌

AJO-DO clinical companion Pub Date : 2026-08-01 Epub Date: 2026-03-17 DOI: 10.1016/j.xaor.2026.02.009

Wei Liu, Jiajun Liu, Chuan Shen, Yuxuan Wang, Zuping Wu

{"title":"Camouflage of hyperdivergent Class II malocclusion using 3 maxillary miniscrews and a mandibular intrusion arch","authors":"Wei Liu, Jiajun Liu, Chuan Shen, Yuxuan Wang, Zuping Wu","doi":"10.1016/j.xaor.2026.02.009","DOIUrl":"10.1016/j.xaor.2026.02.009","url":null,"abstract":"<div><div>Modulating the cant of the posterior occlusal plane is critical in the treatment of hyperdivergent Class II malocclusion, as it helps create posterior space that facilitates forward mandibular rotation. This case report presents the orthodontic camouflage treatment of a 29-year-old male with Class II Division 1 malocclusion, a convex facial profile, and a severely retruded mandible. Four premolars were extracted. Three maxillary miniscrews were strategically placed to facilitate en masse intrusion and retraction of the maxillary dentition. In the mandible, an auxiliary intrusion arch was combined with a continuous archwire to achieve anterior intrusion and molar uprighting. After 25 months of treatment, a Class I molar relationship was established, maxillary incisor torque was properly controlled, normal overbite and overjet were achieved, and the patient’s overall facial profile was significantly improved. This case report demonstrates that the combination of 3 maxillary miniscrews and a mandibular intrusion arch effectively achieved vertical control and sagittal retraction, providing a significant treatment approach for patients with hyperdivergent Class II malocclusion.</div></div>","PeriodicalId":72140,"journal":{"name":"AJO-DO clinical companion","volume":"6 4","pages":"Pages 340-355"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148694735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Authors’ response 作者的回应

AJO-DO clinical companion Pub Date : 2026-08-01 Epub Date: 2025-12-25 DOI: 10.1016/j.xaor.2025.12.002

Hirofumi Tenshin, Keiichiro Watanabe, Emiko Nakaue, Yuichi Ishida, Eiji Tanaka

引用次数: 0

June 2026 2026年6月

AJO-DO clinical companion Pub Date : 2026-06-01 Epub Date: 2026-06-02 DOI: 10.1016/j.xaor.2026.05.002

引用次数: 0

Considerations for growth and orthodontic treatment of a growing patient with central precocious puberty 中枢性性早熟患者生长发育及正畸治疗的考虑

AJO-DO clinical companion Pub Date : 2026-06-01 Epub Date: 2026-03-12 DOI: 10.1016/j.xaor.2026.02.008

Sungmin Cha, Seung-Hak Baek

{"title":"Considerations for growth and orthodontic treatment of a growing patient with central precocious puberty","authors":"Sungmin Cha, Seung-Hak Baek","doi":"10.1016/j.xaor.2026.02.008","DOIUrl":"10.1016/j.xaor.2026.02.008","url":null,"abstract":"<div><div>Central precocious puberty (CPP) causes premature secretion of sex hormones that accelerates skeletal maturation and may disturb normal facial growth balance. The purpose of this case report was to explain the considerations for growth and orthodontic treatment of a growing patient treated with gonadotropin-releasing hormone agonist therapy for CPP and longitudinal follow-up data. A 7-year-old girl visited the clinic with chief complaints of an anterior open bite and crowding. She exhibited a mild skeletal Class III tendency with maxillary retrusion and relative mandibular protrusion. Fan-type expansion plate therapy was started for the correction of a narrow maxilla. At the age of 8 years, she was diagnosed with idiopathic CPP and underwent gonadotropin-releasing hormone agonist therapy for 14 months. Growth observation was started. After medical suppression of puberty, longitudinal records revealed normalization of pubertal timing and peak height velocity. Cephalometric analysis demonstrated significant forward and downward maxillary growth, resulting in harmonization with mandibular growth. A spontaneous transition to a Class I relationship was obtained without orthopedic intervention. Subsequent orthodontic treatment, including miniscrew-assisted rapid palatal expansion, extraction of the 4 second premolars, and fixed treatment, achieved stable occlusion and harmonious facial esthetics. Class I canine and molar relationships and normal overbite and overjet were obtained. The total treatment and follow-up duration was 9 years 2 months. The treatment outcome was well maintained at 1-year retention follow-up. Close collaboration with pediatric endocrinologists, meticulous longitudinal growth observation, and precise evaluation of pubertal growth status are essential for determining the proper timing and necessity of orthodontic treatment for growing patients with CPP.</div></div>","PeriodicalId":72140,"journal":{"name":"AJO-DO clinical companion","volume":"6 3","pages":"Pages 224-240"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Orthodontics and pediatric dentistry: Competition or collaboration? 正畸与儿童牙科：竞争还是合作？

AJO-DO clinical companion Pub Date : 2026-06-01 Epub Date: 2026-06-02 DOI: 10.1016/j.xaor.2026.05.001

Jae Hyun Park (Editor-in-Chief)

引用次数: 0

Clear aligner camouflage retreatment of a patient with hyperdivergent Class III malocclusion with asymmetrical extraction 透明矫正器伪装再治疗1例超发散III类错牙合不对称拔牙

AJO-DO clinical companion Pub Date : 2026-06-01 Epub Date: 2026-03-16 DOI: 10.1016/j.xaor.2026.02.011

Wenjie Zhong , Jiuxiang Lin , Peizeng Jia , Huaxiang Zhao

{"title":"Clear aligner camouflage retreatment of a patient with hyperdivergent Class III malocclusion with asymmetrical extraction","authors":"Wenjie Zhong , Jiuxiang Lin , Peizeng Jia , Huaxiang Zhao","doi":"10.1016/j.xaor.2026.02.011","DOIUrl":"10.1016/j.xaor.2026.02.011","url":null,"abstract":"<div><div>Camouflage treatment for adult skeletal Class III malocclusion is highly challenging, especially in patients with a history of unsuccessful orthodontic treatment involving maxillary premolar extractions. This case report presents the successful retreatment of a 28-year-old woman with a skeletal Class III malocclusion, a high mandibular plane angle, an anterior crossbite, bilateral asymmetry in canine and molar relationships, posterior transverse discrepancies, and a mandibular deviation with a midline shift. Treatment involved clear aligners combined with a temporary skeletal anchorage device–assisted maxillary distalization and mandibular asymmetrical extraction. These were supplemented by optimized biomechanical strategies and controlled tipping of the mandibular incisors. Well-aligned dentition, ideal occlusion, and improved facial esthetics were achieved. Taken together, this case report supports the use of clear aligners as a viable option for complex camouflage retreatment in adult skeletal Class III malocclusion and offers new therapeutic and biomechanical insights.</div></div>","PeriodicalId":72140,"journal":{"name":"AJO-DO clinical companion","volume":"6 3","pages":"Pages 254-267"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Orthodontic treatment of 2 growing sisters with multiple pterygium syndrome, severe crowding, and narrow dental arches 多发翼状胬肉综合征、严重拥挤、牙弓狭窄发育姐妹2例正畸治疗

AJO-DO clinical companion Pub Date : 2026-06-01 Epub Date: 2026-02-23 DOI: 10.1016/j.xaor.2026.02.004

Su-Ji Yoon, Seung-Hak Baek

{"title":"Orthodontic treatment of 2 growing sisters with multiple pterygium syndrome, severe crowding, and narrow dental arches","authors":"Su-Ji Yoon, Seung-Hak Baek","doi":"10.1016/j.xaor.2026.02.004","DOIUrl":"10.1016/j.xaor.2026.02.004","url":null,"abstract":"<div><div>The purpose of this case report was to describe the concept of orthodontic treatment for 2 growing sisters with multiple pterygium syndrome (MPS), nonlethal type. MPS is characterized by multiple joint contractures and pterygia, associated with the cholinergic receptor nicotinic gamma subunit gene mutation. Two sisters, aged 8 and 6 years, respectively, visited the clinic with chief complaints of severe crowding and a retrusive mandible. After 3 years of growth observation, they exhibited a skeletal Class II pattern with mandibular retrusion despite catch-up growth of the mandible. They also showed a hyperdivergent pattern, severe crowding, a V-shaped narrow maxillary arch, a deep curve of Spee in the mandibular arch, and a narrow upper airway space. Orthodontic treatment for the 2 sisters began with the extraction of the 4 first premolars. After decrowding and extraction space closure, orthodontic mini-implants were used for intrusion of the maxillary molars and total arch distalization of the maxillary dentition. The elder and younger sisters were debonded at the ages of 20 and 21 years, respectively. Normal overbite, overjet, and Class I canine and molar relationships were obtained. During the fixed treatment period, both patients showed catch-up growth of the mandible. Because of frequent no-shows, the total treatment duration was extended to approximately 8 and 12 years, respectively. However, treatment outcome was well maintained at the 2-year follow-up visit for the elder sister. Catch-up growth of the mandible during the pubertal period, along with the use of orthodontic mini-implants for intrusion of the maxillary molars and total distalization of the maxillary dentition, helped achieve a skeletal Class I pattern in growing patients with MPS.</div></div>","PeriodicalId":72140,"journal":{"name":"AJO-DO clinical companion","volume":"6 3","pages":"Pages 201-212"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Alveolar bone repair of orthodontically-induced dehiscence in an adult with severe skeletal Class II malocclusion: A 5-year follow-up 牙槽骨修复正畸诱导的成人严重II类骨错牙合裂隙：5年随访

AJO-DO clinical companion Pub Date : 2026-06-01 Epub Date: 2026-03-16 DOI: 10.1016/j.xaor.2026.02.010

Zining Chen , Qianyi Qin , Yifan Lin , Yunfei Zheng , Runzhi Guo , Weiran Li

{"title":"Alveolar bone repair of orthodontically-induced dehiscence in an adult with severe skeletal Class II malocclusion: A 5-year follow-up","authors":"Zining Chen , Qianyi Qin , Yifan Lin , Yunfei Zheng , Runzhi Guo , Weiran Li","doi":"10.1016/j.xaor.2026.02.010","DOIUrl":"10.1016/j.xaor.2026.02.010","url":null,"abstract":"<div><div>Camouflage treatment using temporary skeletal anchorage devices offers a nonsurgical alternative for patients with skeletal Class II hyperdivergence seeking facial profile improvement. However, in patients with limited alveolar bone volume, the required retraction of the anterior teeth may lead to bone defects. This report presents a patient with substantial recovery from orthodontically-induced alveolar bone dehiscence at 5-year follow-up. A 19-year-old woman with skeletal Class II hyperdivergent facial pattern underwent camouflage treatment to improve facial convexity. Maximum anterior retraction was achieved using temporary skeletal anchorage devices after the extraction of the 4 first premolars. The treatment resulted in a more balanced facial profile, stable Class I occlusion, and an ideal overjet and overbite. However, cone-beam computed tomography revealed alveolar bone dehiscence in the maxillary and mandibular anterior teeth with physiological mobility. Laser Doppler flowmetry revealed stable pulpal blood flow in the affected anterior teeth, indicating that the pulpal vitality was preserved. Superimposition of posttreatment and 5-year follow-up cone-beam computed tomography images showed substantial bone recovery with decreased lingual alveolar bone height and increased lingual alveolar bone thickness. This may be attributed to the long-term alveolar bone remodeling and minor labial relapse (Little irregularity index increased by 0.65 mm in the maxilla and by 0.98 mm in the mandible). This case report suggests that adult patients still have considerable potential for alveolar bone remodeling, which may have been previously underestimated. Nevertheless, orthodontists should carefully plan tooth movement within the boundaries of the alveolar bone to ensure long-term periodontal health.</div></div>","PeriodicalId":72140,"journal":{"name":"AJO-DO clinical companion","volume":"6 3","pages":"Pages 241-253"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revisiting Bishara's clinical notation: A quadrant-based supplement to Angle's classification 重新审视Bishara的临床符号：对Angle分类的象限补充

AJO-DO clinical companion Pub Date : 2026-06-01 Epub Date: 2026-03-12 DOI: 10.1016/j.xaor.2026.02.007

Prathapan Parayaruthottam , Vincy Antony

引用次数: 0