The Angle Orthodontist最新文献_第2页

Lower incisor position in skeletal Class III malocclusion patients: a comparative study of orthodontic camouflage and orthognathic surgery 骨骼Ⅲ类错颌畸形患者的下切牙位置：正畸伪装与正颌外科手术的比较研究

The Angle Orthodontist Pub Date : 2024-05-06 DOI: 10.2319/122523-856.1

Hao Liu, Yuning Zhang, Wenhsuan Lu, Yuhui Yang, Xiaomo Liu, Si Chen, Weiran Li, Bing Han

{"title":"Lower incisor position in skeletal Class III malocclusion patients: a comparative study of orthodontic camouflage and orthognathic surgery","authors":"Hao Liu, Yuning Zhang, Wenhsuan Lu, Yuhui Yang, Xiaomo Liu, Si Chen, Weiran Li, Bing Han","doi":"10.2319/122523-856.1","DOIUrl":"https://doi.org/10.2319/122523-856.1","url":null,"abstract":"\u0000 \u0000 \u0000 To determine the difference between orthodontic camouflage and orthodontic-orthognathic surgery using the traditional cephalometric measurement IMPA and the newly proposed IA/PAMD, the angle between the long axis of the lower incisor (IA) and the principal axis of the mandibular alveolus (PAMD).\u0000 \u0000 \u0000 \u0000 This study included 40 cases each in the orthodontic camouflage group (OG) and orthodontic-orthognathic surgery group (SG). The differences between the IMPA and IA/PAMD before and after treatment were compared between the two groups. T0 lateral cephalometric images of the 10 cases with the highest and lowest increase in the IA/PAMD were analyzed to identify characteristics associated with a higher risk of overdecompensation of the lower incisors during presurgical orthodontic treatment.\u0000 \u0000 \u0000 \u0000 Both the OG and SG showed a significant improvement in hard- and soft-tissue measurements. However, in the OG, there was significant lingual inclination of the lower incisor but only a small change in the IA/PAMD. In the surgical group, the IMPA was close to 90° after treatment, but the IA/PAMD significantly increased.\u0000 \u0000 \u0000 \u0000 In orthodontic camouflage, the lower anterior teeth were significantly moved lingually with a better root-bone relationship. However, this relationship deteriorated in some surgical patients. Therefore, it is important to conduct cephalometric or cone-beam computed tomography examinations during preoperative orthodontics to identify and prevent possible periodontal risks.\u0000","PeriodicalId":503286,"journal":{"name":"The Angle Orthodontist","volume":"4 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141009536","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

Inhibition of 12/15-lipoxygenase reduces orthodontically induced root resorption in rats 抑制 12/15 脂氧合酶可减少正畸诱导的大鼠牙根吸收

The Angle Orthodontist Pub Date : 2024-05-01 DOI: 10.2319/103123-730.1

Yukako Nashiro-Oyakawa, Y. Hotokezaka, H. Hotokezaka, Takeshi Moriishi, Mariko Funaki-Dohi, Yosuke Iuchi, Mizuki Ohama, Y. Morita, Noriaki Yoshida

{"title":"Inhibition of 12/15-lipoxygenase reduces orthodontically induced root resorption in rats","authors":"Yukako Nashiro-Oyakawa, Y. Hotokezaka, H. Hotokezaka, Takeshi Moriishi, Mariko Funaki-Dohi, Yosuke Iuchi, Mizuki Ohama, Y. Morita, Noriaki Yoshida","doi":"10.2319/103123-730.1","DOIUrl":"https://doi.org/10.2319/103123-730.1","url":null,"abstract":"\u0000 \u0000 \u0000 To investigate whether the inhibition of 12/15-lipoxygenase (12/15-LOX), one of the core enzymes of the arachidonic acid cascade, suppresses orthodontically induced root resorption (OIRR), and examine the involvement of the hyaline degeneration of periodontal ligament cells and odontoclast differentiation.\u0000 \u0000 \u0000 \u0000 The left maxillary first molars of 10-week-old male Wistar rats were moved mesially for 14 days using a closed-coil spring (25 cN) inserted between the first molar and incisor. The rats were intraperitoneally administered with a 12/15-LOX specific inhibitor (ML-351; 0.05 mmol/kg) daily in the experimental group or vehicle (dimethyl sulfoxide) in the control group. Tooth movement was measured using microcomputed tomography on day 14. The appearance of OIRR, hyaline degeneration, osteoclasts, and odontoclasts was evaluated via histological analysis. Immunohistochemical staining for receptor-activated NF-kB ligand (RANKL) and osteoprotegerin was performed.\u0000 \u0000 \u0000 \u0000 OIRR observed on day 14 in the control group was strongly suppressed by ML-351 treatment. Hyaline degeneration observed on the compression side on day 3 and the appearance of osteoclasts and odontoclasts on days 3 and 14 were significantly suppressed by ML-351. RANKL expression on day 3 was significantly suppressed by ML-351. These key processes in OIRR were substantially suppressed by ML-351 treatment.\u0000 \u0000 \u0000 \u0000 Inhibition of 12/15-LOX reduced OIRR by suppressing hyaline degeneration and subsequent odontoclast differentiation.\u0000","PeriodicalId":503286,"journal":{"name":"The Angle Orthodontist","volume":"47 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141041017","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

Effects of eruption guidance appliance in the early treatment of Class III malocclusion 萌出引导矫治器在早期治疗 III 类错牙合畸形中的效果

The Angle Orthodontist Pub Date : 2024-02-29 DOI: 10.2319/071223-488

Gonzalo Velásquez, A. Aliaga–Del Castillo, M. Valerio, O. Maranhão, F. Miranda, G. Janson

{"title":"Effects of eruption guidance appliance in the early treatment of Class III malocclusion","authors":"Gonzalo Velásquez, A. Aliaga–Del Castillo, M. Valerio, O. Maranhão, F. Miranda, G. Janson","doi":"10.2319/071223-488","DOIUrl":"https://doi.org/10.2319/071223-488","url":null,"abstract":"\u0000 \u0000 \u0000 To evaluate the dentoskeletal effects and effectiveness of the eruption guidance appliance in Class III patients in the mixed dentition.\u0000 \u0000 \u0000 \u0000 The experimental group comprised 22 patients with Class III malocclusion and anterior cross-bite (12 males, 10 females, mean age 7.63 ± 0.96 years) treated with the eruption guidance appliance over a mean period of 1.72 ± 0.48 years. The control group comprised 22 untreated subjects (12 males, 10 females, mean age 7.21 ± 0.60 years) with Class III malocclusion. Lateral cephalometric radiographs were obtained at pretreatment (T1) and posttreatment (T2). Intergroup comparisons were performed with Mann-Whitney and t-tests (P < .05).\u0000 \u0000 \u0000 \u0000 In the experimental and control groups, the anteroposterior relationship between the maxilla and mandible (ANB angle) remained stable during the treatment period (T1 to T2). The mandibular plane angle decreased in the experimental group and increased in the control group. In the experimental group, the lower anterior face height increase and maxillary molar vertical development were significantly smaller compared to controls. Positive overjet was achieved in 54% of the experimental group.\u0000 \u0000 \u0000 \u0000 The eruption guidance appliance produced no change in the skeletal anteroposterior relationship. The anterior cross-bite/edge-to-edge relationship was corrected in only about half of the treated subjects.\u0000","PeriodicalId":503286,"journal":{"name":"The Angle Orthodontist","volume":"23 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140409554","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

Academic Orthodontic Opportunities 学术正畸机会

The Angle Orthodontist Pub Date : 2024-02-21 DOI: 10.2319/1945-7103-94.2.260

引用次数: 0

Long-term skeletodental changes with early and late treatment using modified C-palatal plates in hyperdivergent Class II adolescents 使用改良 C 型腭板对发育过度迟缓的 II 类青少年进行早期和晚期治疗后的长期骨骼牙齿变化

The Angle Orthodontist Pub Date : 2024-01-16 DOI: 10.2319/081123-556.1

Jaehyun Kim, Nam-Ki Lee, Y. Kook, Yoonji Kim, Chong Ook Park, Alex Hung Kuo Chou, Sung-Hoon Han, Jae Hyun Park

{"title":"Long-term skeletodental changes with early and late treatment using modified C-palatal plates in hyperdivergent Class II adolescents","authors":"Jaehyun Kim, Nam-Ki Lee, Y. Kook, Yoonji Kim, Chong Ook Park, Alex Hung Kuo Chou, Sung-Hoon Han, Jae Hyun Park","doi":"10.2319/081123-556.1","DOIUrl":"https://doi.org/10.2319/081123-556.1","url":null,"abstract":"\u0000 \u0000 \u0000 To compare skeletodental changes between early and late treatment groups using modified C-palatal plates (MCPP) and long-term retention outcomes in hyperdivergent Class II adolescents.\u0000 \u0000 \u0000 \u0000 Seventy-one hyperdivergent Class II patients were divided into four groups according to treatment modality and treatment timing: group 1, early treatment with MCPP (n = 16; 9.9 ± 0.9 years); group 2, late treatment with MCPP (n = 19; 12.3 ± 0.8 years); group 3, early treatment with headgear (HG; n = 18; 9.6 ± 0.8 years); and group 4, late treatment with HG (n = 18; 12.1 ± 1.2 years). Lateral cephalograms were taken and skeletal and dental variables were measured. For statistical analysis, paired t-tests, independent t-tests, and multiple regression were performed.\u0000 \u0000 \u0000 \u0000 The early MCPP group showed a more significant decrease in mandibular plane angle than the late MCPP group did, and vertical control was more efficient in the early group than in the late group. In the MCPP groups, both FMA and SN-GoGn were increased with late treatment but decreased with early treatment, and the difference was statistically significant (P < .01). The early-treatment MCPP group had a significant decrease in SN-GoGn of 0.6° compared with an increase of 1.7° in the early treatment HG group (P < .01). Posttreatment stability of both the early and late MCPP groups was maintained in long-term retention.\u0000 \u0000 \u0000 \u0000 Early MCPP showed more significant vertical control than late MCPP. However, there was no difference in long-term stability between early and late groups.\u0000","PeriodicalId":503286,"journal":{"name":"The Angle Orthodontist","volume":"53 50","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139527563","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

Efficacy of an experimental gaseous ozone-based sterilization method for clear aligners 基于气态臭氧的透明矫治器消毒实验方法的功效

The Angle Orthodontist Pub Date : 2024-01-03 DOI: 10.2319/061623-421.1

Fabiana Nicita, Massimo Calapaj, S. Alibrandi, L. Donato, Emidio Aquilio, R. D’Angelo, A. Sidoti

{"title":"Efficacy of an experimental gaseous ozone-based sterilization method for clear aligners","authors":"Fabiana Nicita, Massimo Calapaj, S. Alibrandi, L. Donato, Emidio Aquilio, R. D’Angelo, A. Sidoti","doi":"10.2319/061623-421.1","DOIUrl":"https://doi.org/10.2319/061623-421.1","url":null,"abstract":"\u0000 \u0000 \u0000 To assess effectiveness of an experimental sterilization method based on the exposure of an O3/O2 gas mixture directly inside the packaging for clear aligners.\u0000 \u0000 \u0000 \u0000 Fifty samples consisting of pieces of polyethylene terephthalate glycol (PET-G) aligners were contaminated by manual handling and subsequently divided into different groups (n = 30 for exposure to O3/O2 gas at different times, n = 10 for positive control with 2% chlorhexidine digluconate, n = 10 for negative control). The measurement of optical densities (OD) of the initial and final microbial cultures was recorded for all groups. Kruskal-Wallis test was used for differences between groups while Wilcoxon test was used to compare initial and final OD values within groups. Statistical significance was set at P < .05.\u0000 \u0000 \u0000 \u0000 Comparison within the groups showed statistically significant differences for exposure to the gaseous mixture (72 hours), for positive and negative controls. Other significant differences were found in the multiple comparisons between the application of gaseous ozone (48 hours and 72 hours) and the negative control.\u0000 \u0000 \u0000 \u0000 The direct exposure of gaseous ozone on the aligners inside their packaging showed microbicidal capacity at 72 hours, which was equivalent to the positive control with immersion in chlorhexidine digluconate. This innovative sterilization procedure could be considered in the final manufacturing processes of clear aligners to eliminate the potentially pathogenic microorganisms that are deposited on surfaces of these orthodontic devices.\u0000","PeriodicalId":503286,"journal":{"name":"The Angle Orthodontist","volume":"124 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139387773","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

Assessment of maximal inspiratory and expiratory pressures in skeletal Class II patients with different growth patterns 评估不同生长模式的骨骼 II 级患者的最大吸气和呼气压力

The Angle Orthodontist Pub Date : 2023-12-28 DOI: 10.2319/071723-496.1

Hita Rangarajan, I. I. Ayub, Sridevi Padmanabhan

{"title":"Assessment of maximal inspiratory and expiratory pressures in skeletal Class II patients with different growth patterns","authors":"Hita Rangarajan, I. I. Ayub, Sridevi Padmanabhan","doi":"10.2319/071723-496.1","DOIUrl":"https://doi.org/10.2319/071723-496.1","url":null,"abstract":"To evaluate maximal inspiratory (MIP) and expiratory (MEP) pressures, which are reflective of respiratory muscle strength, in skeletal Class II patients with different growth patterns (horizontal, average, and vertical) and to correlate those with airway dimension. Patients with a Class II skeletal base seeking orthodontic treatment were assigned to the following groups: average, horizontal, and vertical growth pattern. The control group (n = 14) comprised patients with a Class I skeletal base and average growth pattern. Airway dimensions were obtained using cone-beam computed tomography scans, and a spirometer with a pressure transducer was used for assessment of MIP and MEP. Routine spirometry for assessment of lung function was also performed. No significant differences were found in maximal inspiratory and expiratory pressures for the study groups in comparison with the control group. Class I patients had significantly greater oropharyngeal and nasopharyngeal airway volumes compared with the study groups. No significant difference in minimal cross-section area of the airway was observed among groups. A weak positive correlation between maximal inspiratory pressure and airway volume was observed. Although Class I patients displayed significantly greater oropharyngeal and nasopharyngeal airway volumes, there was no significant difference in respiratory muscle strength or airway function between Class II patients with different growth patterns and the Class I control group. The findings underscore the significance of exploring factors beyond craniofacial growth patterns that may contribute to sleep-related breathing disorders.","PeriodicalId":503286,"journal":{"name":"The Angle Orthodontist","volume":"20 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139150782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Reviewers for The Angle Orthodontist for 2023 2023 年《角度矫正学》的评论者

The Angle Orthodontist Pub Date : 2023-12-20 DOI: 10.2319/1945-7103-94.1.138

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