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Comparison of 3D-printed and laboratory-fabricated Hyrax on stress distribution and displacement of the maxillary complex: a 3D finite element study Prog. Orthod. (IF 4.8) Pub Date : 2024-03-18 Michael Bocklet, Farhad Ahmadi, Timothy Tremont, Loring Ross, Hai Yao, Ildeu Andrade
To analyze and compare the effects of a traditional laboratory-fabricated Hyrax expander (T-Hyrax) and two different 3D-printed Hyrax expander models relative to tension points, force distribution, and areas of concentration in the craniofacial complex during maxillary expansion using finite element analysis. Three maxillary expanders with similar designs, but various alloys were modeled: a T-Hyrax
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Biomechanical analysis of total arch maxillary distalization using infrazygomatic crest miniscrews: a finite element analysis study Prog. Orthod. (IF 4.8) Pub Date : 2024-03-11 Alessandro Schwertner, Renata Rodrigues de Almeida-Pedrin, Thais Maria Freire Fernandes Poleti, Paula Oltramari, Ana Cláudia Ferreira de Castro Conti, Flávio Augusto Cotrim-Ferreira, Guilherme de Almeida, Carlos Flores-Mir, Marcio Rodrigues de Almeida
To evaluate the maxillary incisors and canine’s immediate movement tendency using three different power arms (PA) height levels during total arch maxillary distalization supported on infrazygomatic crest (IZC) miniscrews according to finite element analysis (FEA). Three finite element models of the maxilla were developed based on CBCT imaging of a teenage male patient presenting a Class II Division
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The association between self-esteem and aesthetic component of smile among adolescents Prog. Orthod. (IF 4.8) Pub Date : 2024-03-04 Lidia Gavic, Mihaela Budimir, Antonija Tadin
Self-esteem plays a crucial role during adolescence in a shaping of an individual’s overall well-being and confidence. The aim of this study was to explore the relationship between the self-esteem in adolescents and their smile aesthetics, as well as to assess the alignment of opinions on this matter between adolescents and dentists. Sample included 413 students in Split-Dalmatia County, aged 13 to
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Skeletal stability of inter-molar mandibular distraction osteogenesis in growing patients Prog. Orthod. (IF 4.8) Pub Date : 2024-02-26 Matthew Lewis, Peter Lewis, Tung Nguyen, Alethea Rea, Mithran S. Goonewardene
The aim of this retrospective study was to firstly assess the stability of surgical advancement using inter-molar mandibular distraction osteogenesis (IMDO) and secondly to assess the impact of the surgical intervention on subsequent mandibular growth in patients with residual growth. The sample consisted of 17 (13F and 4M) consecutively treated patients who underwent IMDO and orthodontic treatment
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Surface wear of attachments in patients during clear aligner therapy: a prospective clinical study Prog. Orthod. (IF 4.8) Pub Date : 2024-02-19 Qiuying Li, Kai Yang
This prospective clinical study aimed to quantitatively evaluate the surface wear of attachments and investigate the associated risk factors. Additionally, the wear values and regions of three types of commonly used attachments were explored. Participants were recruited from the population of patients who received clear aligner therapy from October to December 2022. Intraoral scanning was performed
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The effect of micro-osteoperforations on the rate of maxillary incisors' retraction in orthodontic space closure: a randomized controlled clinical trial Prog. Orthod. (IF 4.8) Pub Date : 2024-02-12 Carolina Morsani Mordente, Dauro Douglas Oliveira, Juan Martin Palomo, Polyana Araújo Cardoso, Marina Araújo Leite Assis, Elton Gonçalves Zenóbio, Bernardo Quiroga Souki, Rodrigo Villamarim Soares
This single-centered randomized controlled clinical trial aimed to evaluate the effectiveness of micro-osteoperforations (MOPs) in accelerating the orthodontic retraction of maxillary incisors. Forty-two patients aged 16–40 were recruited and randomly assigned into two groups, one which underwent MOPs (MOPG) in the buccal and palatal region of all maxillary incisors immediately before the start of
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The effect of vertical skeletal proportions, skeletal maturation, and age on midpalatal suture maturation: a CBCT-based study Prog. Orthod. (IF 4.8) Pub Date : 2024-02-05 Martina Ferrillo, Kieran Daly, Nikolaos Pandis, Padhraig S. Fleming
Midpalatal suture (MPS) maturation may be influenced by a range of parameters including age, gender, and vertical skeletal pattern. We therefore aimed to evaluate the effect of Frankfurt-mandibular angle (FMA), skeletal maturation, and age on the timing of MPS maturation. In this cross-sectional study, cone-beam computed tomography (CBCT) and lateral cephalograms were used to assess the MPS and cervical
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Curve of Spee modification in different vertical skeletal patterns after clear aligner therapy: a 3D set-up retrospective study Prog. Orthod. (IF 4.8) Pub Date : 2024-01-22 Ciavarella Domenico, Fanelli Carlotta, Suriano Carmela, Campobasso Alessandra, Lorusso Mauro, Ferrara Donatella, Maci Marta, Esposito Rosa, Tepedino Michele
The purpose of the present study was to evaluate: (1) changes in the curve of Spee (COS) after clear aligner therapy and (2) whether such changes correlated with the patient’s skeletal patterns. Three-dimensional mandibular models of 106 patients (47 males and 59 females; mean age 22.3 SD ± 3.4 years) treated with clear aligners were retrospectively analysed. The perpendicular distance between the
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The effect of enhanced structure in the posterior segment of clear aligners during anterior retraction: a three-dimensional finite element and experimental model analysis Prog. Orthod. (IF 4.8) Pub Date : 2024-01-15 Xiaohan Jin, Xue Tian, Victoria Lee Zhi Hui, Yikan Zheng, Jinlin Song, Xianglong Han
Mesial tipping of posterior teeth occurs frequently during space closure with clear aligners (CAs). In this study, we proposed a new modification of CA by localized thickening of the aligner to form the enhanced structure and investigate its biomechanical effect during anterior retraction. Two methods were employed in this study. First, a finite element (FE) model was constructed, which included alveolar
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Mechanical force increases tooth movement and promotes remodeling of alveolar bone defects augmented with bovine bone mineral Prog. Orthod. (IF 4.8) Pub Date : 2024-01-08 Jie Deng, Zi-Meng Zhuang, Xiao Xu, Bing Han, Guang-Ying Song, Tian-Min Xu
Orthodontic tooth movement (OTM) in a region containing alveolar bone defects with insufficient height and width is hard to achieve. Bovine bone mineral (Bio-Oss) is available to restore the alveolar defect; however, whether the region augmented with a bovine bone mineral graft (BG) is feasible for OTM, and the mechanisms by which macrophages remodel the BG material, is uncertain under the mechanical
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Comparison of the effects on facial soft tissues produced by rapid and slow maxillary expansion using stereophotogrammetry: a randomized clinical trial Prog. Orthod. (IF 4.8) Pub Date : 2024-01-03 Matilde Marino Merlo, Bernardo Quiroga Souki, Michele Nieri, Agnese Bonanno, Veronica Giuntini, James A. McNamara Jr., Lorenzo Franchi
To compare the effects on facial soft tissues produced by maxillary expansion generated by rapid maxillary expansion (RME) versus slow maxillary expansion (SME). Patients in the mixed dentition were included with a transverse discrepancy between the two arches of at least 3 mm. A conventional RME screw was compared to a new expansion screw (Leaf expander) designed to produce SME. Both screws were incorporated
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Influence of maxillary molar distalization with clear aligners on three-dimensional direction: molar distal movement, intrusion, distal tip and crown buccal torque Prog. Orthod. (IF 4.8) Pub Date : 2023-12-28 Zeyao Miao, Haijuan Zhang, Yuxuan Yang, Yandong Han, Jing Leng, Shuang Wang
The aim of this study was to evaluate the distal movement, vertical movement, distal tipping and crown buccal torque of maxillary molars after the completion of distalization by comparing the predicted movement with the achieved movement using palatal rugae registration. The study included 22 clear aligner patients (7 males and 15 females), and 79 molars were measured. Two digital models were generated
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Dentofacial characteristics of children and adolescents with foetal alcohol spectrum disorders: a comparison with matched controls Prog. Orthod. (IF 4.8) Pub Date : 2023-12-26 Katarzyna Ludwików, Anna Westerlund, Nameer Al-Taai, Małgorzata Zadurska, Ewa Monika Czochrowska
Foetal alcohol spectrum disorders (FASD) include somatic and neurological developmental disturbances after prenatal alcohol exposure, including facial anomalies. However, the knowledge of the orthodontic skeletal and dental cephalometric relations in this group is limited. The aim of the study was to assess the dentofacial characteristics of children and adolescents with FASD and to compare them with
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Accuracy of 3D facial scans: a comparison of three different scanning system in an in vivo study Prog. Orthod. (IF 4.8) Pub Date : 2023-12-25 Federica Pellitteri, Fabrizio Scisciola, Francesca Cremonini, Matilde Baciliero, Luca Lombardo
The aim of the study was to compare the accuracy and reproducibility of three different 3D facial scanning systems, relying, respectively, on stereophotogrammetry, structured light and a smartphone app and camera. Thirty subjects have been scanned with three different facial scanning systems, stereophotogrammetry, structured light and a smartphone app and camera. Linear measurements were compared with
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Three-dimensional assessment of periodontal support of lower incisors for skeletal Class II malocclusion undergoing presurgical orthodontic treatment with different vertical skeletal patterns Prog. Orthod. (IF 4.8) Pub Date : 2023-12-18 Hangmiao Lyu, Huimin Ma, Xiaoxia Wang, Li Xu, Jianxia Hou, Yijiao Zhao, Weiran Li, Xiaotong Li
The aim of the present study was to compare periodontal support changes during retraction of mandibular anterior teeth for skeletal Class II malocclusion with different facial divergence and to analyze relevant factors influencing bone remodeling by applying three-dimensional (3D) cone-beam computed tomography (CBCT) reconstruction technology. Forty-eight patients with Class II malocclusion requiring
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Analysis of maxillary asymmetry before and after treatment of functional posterior cross-bite: a retrospective study using 3D imaging system and deviation analysis Prog. Orthod. (IF 4.8) Pub Date : 2023-12-11 Vincenzo Ronsivalle, Gaetano Isola, Gianmarco Lo Re, Mattia Boato, Rosalia Leonardi, Antonino Lo Giudice
Previous evidence would suggest that subjects affected by functional posterior cross-bite (FPXB) present an asymmetric morphology of the maxilla. However, no evidence is available concerning the morphology (symmetry/asymmetry) of the maxilla after treatment of FPXB. This study aimed to investigate the volumetric and morphological changes of the palate in FPXB subjects treated with maxillary expansion
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Biomechanical effects of different staging and attachment designs in maxillary molar distalization with clear aligner: a finite element study Prog. Orthod. (IF 4.8) Pub Date : 2023-12-04 Jie Gao, Donghui Guo, Xu Zhang, Yuxun Cheng, Hao Zhang, Yuerong Xu, Zuolin Jin, Yanning Ma
In the present study, the effects of distalizations of one and two molars with different step distances and attachment designs have been analyzed. A 3D finite element analysis model has been developed in order to determine the tendency of tooth displacement and stress distribution with clear aligner treatment. Under the condition of single-molar distalization, when the step distance was set to 0.25 mm
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Effects of aligner activation and power arm length and material on canine displacement and periodontal ligament stress: a finite element analysis Prog. Orthod. (IF 4.8) Pub Date : 2023-11-27 Aysegul Inan, Merve Gonca
This study aimed to assess the impact of aligner activation and power arm length and material on canine and aligner displacement, von Mises stress in the power arm, and principal stress in the periodontal ligament (PDL) during canine tooth distalization using finite element analysis (FEA). The effects of aligner activation and power arm length were primary outcomes, while the effect of the power arm
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The displacement of teeth and stress distribution on periodontal ligament under different upper incisors proclination with clear aligner in cases of extraction: a finite element study Prog. Orthod. (IF 4.8) Pub Date : 2023-11-20 Fujia Kang, Yumiao Wu, Yuchen Cui, Jiamin Yuan, Zhiqiang Hu, Xianchun Zhu
To investigate the displacement of dentition and stress distribution on periodontal ligament (PDL) during retraction and intrusion of anterior teeth under different proclination of incisors using clear aligner (CA) in cases involving extraction of the first premolars. Models were constructed, consisting of the maxilla, PDLs, CA and maxillary dentition without first premolars. These models were then
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Assessment of the efficacy of various maxillary molar intrusion therapies: a systematic review Prog. Orthod. (IF 4.8) Pub Date : 2023-11-13 Sarah Abu Arqub, Dalya Al-Moghrabi, Marissa G. Iverson, Philippe Farha, Hala Abdullah Alsalman, Flavio Uribe
To systematically assess the efficacy of the various interventions used to intrude maxillary molars. Furthermore, to evaluate associated root resorption, stability of intrusion, subsequent vertical movement of mandibular molars, cost effectiveness, compliance, patient reported outcomes and adverse events. A pre-registered and comprehensive literature search of published and unpublished trials until
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Long-term bone remodeling of maxillary anterior teeth with post-treatment alveolar bone defect in adult patients with maxillary protrusion: a prospective follow-up study Prog. Orthod. (IF 4.8) Pub Date : 2023-11-06 Runzhi Guo, Linwei Li, Yifan Lin, Yiping Huang, Jian Liu, Mengqiao Pan, Li Xu, Weiran Li
Alveolar bone defects, particularly palatal bone dehiscence (PBD) and labial bone fenestration (LBF), occur frequently as a result of retraction of the maxillary anterior teeth. The study aims to explore the long-term bone remodeling of maxillary anterior teeth in adult patients with post-orthodontic treatment PBD and LBF. The study includes 24 adult patients with maxillary protrusion (8 males, 16
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Analysis of oral microbiome on temporary anchorage devices under different periodontal conditions Prog. Orthod. (IF 4.8) Pub Date : 2023-10-30 Ningrui Zhao, Qian Zhang, Yanning Guo, Shengjie Cui, Yajing Tian, Yanheng Zhou, Xuedong Wang
Temporary anchorage devices (TADs) are maximum anchorages that have been widely used in orthodontic treatment. The aim of the study was to uncover whether a history of periodontitis would influence microbiome colonization on the TAD surface. Patients were grouped by periodontal evaluations before the orthodontic treatment. Patients with healthy periodontal conditions were classified as the healthy
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Correction to: Predictability of orthodontic tooth movement with aligners: effect of treatment design Prog. Orthod. (IF 4.8) Pub Date : 2023-10-24 Tommaso Castroflorio, Ambra Sedran, Simone Parrini, Francesco Garino, Matteo Reverdito, Riccardo Capuozzo, Sabrina Mutinelli, Simonas Grybauskas, Mantas Vaitiekūnas, Andrea Deregibus
Following publication of the original article [1], the authors identified an error in two sentences in the Discussion section. The sentences currently read: Similar results were obtained by Goh et al. [33] for the lower first molar only. Differences among the studies could be related to the fact that patients considered by Goh et al. were treated with a maximum number of 14 aligners, therefore with
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Clinical evaluation of marketed and non-marketed orthodontic products: are researchers now ahead of the times? A meta-epidemiological study Prog. Orthod. (IF 4.8) Pub Date : 2023-10-23 Almaha Alhussain, Martyn T. Cobourne, Nikolaos Pandis, Jadbinder Seehra
The advertisement and adoption of untested orthodontic products is common. This study aimed to provide an update regarding the prevalence of clinical trials in orthodontics evaluating commercially marketed products. Associations between marketed/non-marketed products and study characteristics such as direction of effect, declaration of conflict of interest and industry sponsorship were evaluated. In
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Angiotensin(1-7) attenuates tooth movement and regulates alveolar bone response during orthodontic force application in experimental animal model Prog. Orthod. (IF 4.8) Pub Date : 2023-10-16 Hatem Abuohashish, Suliman Shahin, Abdulaziz Alamri, Zainah Salloot, Hussain Alhawaj, Omar Omar
Renin–angiotensin system and its ACE2/Ang(1-7)/Mas receptor axis regulates skeletal response to multiple physiological and pathological conditions. Recent research suggested a vital role of Ang(1-7) in regulating alveolar bone metabolism and remodeling. In this context, this study evaluated the effects of the Ang(1-7)/Mas receptor axis on orthodontic tooth movement (OTM) and the alveolar bone response
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Effective contribution ratio of the molar during sequential distalization using clear aligners and micro-implant anchorage: a finite element study Prog. Orthod. (IF 4.8) Pub Date : 2023-10-09 Xulin Liu, Junjie Wu, Yuxun Cheng, Jie Gao, Yi Wen, Yubohan Zhang, Houzhuo Luo, Zuolin Jin, Yanning Ma
This study aims to investigate the biomechanical effects of anchorage reinforcement using clear aligners (CAs) with microimplants during molar distalization. And also explores potential clinical strategies for enhancing anchorage in the sequential distalization process. Finite element models were established to simulate the CAs, microimplants, upper dentition, periodontal ligament (PDL), and alveolar
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The effect of space arrangement between anterior teeth on their retraction with clear aligners in first premolar extraction treatment: a finite element study Prog. Orthod. (IF 4.8) Pub Date : 2023-09-25 Yuan Cao, Zhi-Wei Wang, Da Chen, Lu Liu, Deng-Xin Li, Ni Li, Si-Qi Ying, Xin Liu, Fang Jin
Clear aligner therapy has become increasingly popular in recent years, although it has encountered several difficulties in premolar extraction treatment. These difficulties include anterior dentition, lingual tipping and extrusion. The design of the present clinical scheme usually set a tiny space between the anterior teeth before retraction in order to obtain an ideal outcome. The objective of our
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Accuracy of lingual straight-wire orthodontic treatment with passive self-ligating brackets and square slot: a retrospective study Prog. Orthod. (IF 4.8) Pub Date : 2023-09-18 Fabrizio Scisciola, Mario Palone, Giuseppe Scuzzo, Giacomo Scuzzo, Luis T. Huanca Ghislanzoni, Luca Lombardo
To investigate the accuracy of torque, tip and rotation and linear intra-arch movements yielded by passive self-ligating lingual straight-wire appliances with brackets featuring square slots. Twenty-five adult Caucasian patients (16 females and 9 males; mean age 26.5 ± 4.3 years) with Class I or mild Class II head-to-head malocclusion were orthodontically treated via passive lingual self-ligating straight-wire
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Prevalence of adenoid hypertrophy among 12-year-old children and its association with craniofacial characteristics: a cross-sectional study Prog. Orthod. (IF 4.8) Pub Date : 2023-09-11 Kwan Lok Tse, Fabio Savoldi, Kar Yan Li, Colman P. McGrath, Yanqi Yang, Min Gu
Identifying the prevalence of adenoid hypertrophy (AH) and craniofacial factors associated with this condition requires studies with random sampling from the general population, and multiple criteria can be used for assessing AH on lateral cephalometric radiograph (LCR). The present analysis represents the first report performed according to these requirements in a large cross-sectional sample of children
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Extracellular vesicles derived from M1 macrophages enhance rat midpalatal suture expansion by promoting initial bone turnover and inflammation Prog. Orthod. (IF 4.8) Pub Date : 2023-09-04 Yi Liu, Yuan Zhong, Bowen Zheng, Yi Liu
Midpalatal suture (MPS) expansion can be affected by many factors, and researchers have attempted to regulate the initial inflammatory stage of expansion to optimize clinical outcomes and their underlying mechanisms. This study aimed to investigate the potential effects and mechanisms of M1 macrophage small extracellular vesicles during rat MPS expansion. RAW264.7 cells were induced to M1 or M2 polarization
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Ridge mini-implants, a versatile biomechanical anchorage device whose success is significantly enhanced by splinting: a clinical report Prog. Orthod. (IF 4.8) Pub Date : 2023-08-28 Sarah Abu Arqub, Renee Greene, Sara Greene, Kolbe Laing, Chia-Ling Kuo, Lucas Da Cunha Godoy, Flavio Uribe
This clinical report aims to highlight the factors affecting the clinical success of alveolar ridge mini-implants used for orthodontic anchorage and provide an overview of the biomechanical versatility of this miniscrew and steps involving the proper technique of its placement. For this clinical report, charts for 295 patients who had temporary anchorage devices (TADs) were screened. Twenty patients
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The relationship between different levels of facial attractiveness and malocclusion perception: an eye tracking and survey study Prog. Orthod. (IF 4.8) Pub Date : 2023-08-21 Merve Zorlu, Hasan Camcı
The aim of this study was to investigate the relationship between levels of facial attractiveness and the perception of different types of malocclusion. A preliminary questionnaire was used to assign photographs of three female patients to low, moderate, and high facial attractiveness designations. Seven modified photographs for each smile photograph of each of these three patients were created. The
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Aging changes in maxillary anterior teeth in untreated individuals: an observational longitudinal study Prog. Orthod. (IF 4.8) Pub Date : 2023-08-14 Gabriela Natsumeda, Felicia Miranda, Camila Massaro, José Roberto Pereira Lauris, Daniela Garib
The aging of the occlusion and tooth wears influence the smile design This study aimed at evaluating the aging changes of maxillary anterior teeth in nontreated subjects. The sample comprised dental models of 23 subjects (13 male, 10 female) with normal occlusions, taken at 13 (T1), 17 (T2) and 61 (T3) years of age. The following variables were measured in the maxillary anterior teeth using digital
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Does different vertical position of maxillary central incisors in women with different facial vertical height affect smile esthetics perception? Prog. Orthod. (IF 4.8) Pub Date : 2023-08-07 Ezgi Atik, Hilal Turkoglu
The aim of this study was to assess the esthetic perceptions of orthodontists, prosthodontists and laypersons with regard to different vertical positions of the maxillary central incisors related to lateral incisors for different facial vertical height cases. Frontal full-face photographs showing social smiles of three adult women aged between 18 and 25 years were used. Vertical position of the maxillary
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3D occlusal changes of upper first molars after rapid maxillary expansion on permanent versus deciduous teeth: a retrospective multicenter CBCT study Prog. Orthod. (IF 4.8) Pub Date : 2023-07-31 Marco Serafin, Rosamaria Fastuca, Piero Antonio Zecca, Manuel Lagravère, Alberto Caprioglio
The purpose of this study was to compare the three-dimensional dental changes for the maxillary first molars and the overall skeletal effects achieved after expansion between the rapid maxillary expansion (RME) appliance attached to two different anchor units, the maxillary deciduous molars and the maxillary permanent first molars. Patients were retrospectively selected according to the anchorage unit
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Impact of molar teeth distalization by clear aligners on temporomandibular joint: a three-dimensional study Prog. Orthod. (IF 4.8) Pub Date : 2023-07-17 Barakat Al-Tayar, Majedh A. A. Al-Somairi, Lina H. ALshoaibi, Xiaoli Wang, Junbin Wang, Jiajie Liu, Baher Al-Tayar, Xiaoli An, Qingzong Si
Maxillary molar distalization is a common technique used in the non-extraction treatment of Angle Class II malocclusion that can effectively correct the molar relationship and create spaces for anterior teeth alignment. However, this approach may also impact the temporomandibular joint (TMJ) due to predictable changes in the posterior vertical dimension. Despite its widespread use, Class II malocclusions
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Forces and moments generated by 3D direct printed clear aligners of varying labial and lingual thicknesses during lingual movement of maxillary central incisor: an in vitro study Prog. Orthod. (IF 4.8) Pub Date : 2023-07-10 James Grant, Patrick Foley, Brent Bankhead, Gabriel Miranda, Samar M. Adel, Ki Beom Kim
The objective of this study was to measure the forces and moments exerted by direct printed aligners (DPAs) with varying facial and lingual aligner surface thicknesses, in all three planes of space, during lingual movement of a maxillary central incisor. An in vitro experimental setup was used to quantify forces and moments experienced by a programmed tooth to be moved and by adjacent anchor teeth
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“Dear Doctor, greetings of the day!”: A 1-year observational study of presumed predatory journal invitations Prog. Orthod. (IF 4.8) Pub Date : 2023-07-03 Christos Livas, Konstantina Delli
This study aimed at investigating the predatory publishing phenomenon in orthodontics by analyzing the content of unsolicited e-mail invitations received within 12 months. All electronic invitations for manuscript submission, review and editorial membership received between 1 October 2021 and 30 September 2022 were collected from an orthodontist’s inbox. The following data were recorded for each e-mail:
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Comparison of spontaneous eruption and modified closed eruption technique with palatal traction in alignment of impacted maxillary central incisor teeth Prog. Orthod. (IF 4.8) Pub Date : 2023-06-26 Ivo Marek, Anna Janková, Martin Starosta, Michal Novosad, Josef Kučera
Central incisor impaction is a rare condition with potentially severe clinical and psychological implications for the patient. Treatment techniques vary according to the pretreatment situation and individual factors. The aim of this study was to compare the esthetic outcomes and treatment times between two different approaches. In this retrospective study, thirty-one consecutive patients (13 boys,
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Dentofacial effects of miniscrew-anchored maxillary protraction on prepubertal children with maxillary deficiency: a randomized controlled trial Prog. Orthod. (IF 4.8) Pub Date : 2023-06-12 Ahmed Mohamed Kamel, Nour Eldin Tarraf, Ahmed Maher Fouda, Ahmad Mohammed Hafez, Ahmed El-Bialy, Benedict Wilmes
The introduction of bone-anchored maxillary protraction eliminated the side effects of facemask in the early treatment of patients with maxillary retrusion. This study aimed to evaluate the effects of miniscrew-anchored maxillary protraction (MAMP) and compare them with the growth changes in an untreated control group in growing patients with Class III malocclusion. Forty growing patients with Class
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Three-dimensional analysis of miniscrew position changes during bone-borne expansion in young and late adolescent patients Prog. Orthod. (IF 4.8) Pub Date : 2023-06-05 Marco Migliorati, Anna De Mari, Fabio Annarumma, Hussein Aghazada, Giovanni Battista, Alessandra Campobasso, Maria Menini, Antonino Lo Giudice, Lucia H. S. Cevidanes, Sara Drago
Maxillary expansion in patients at the end of their growth relies on the possibility to use miniscrew supported expanders to apply expansion forces directly to the midpalatal suture. Although miniscrews provide a stable anchorage unit, several studies have reported that they do not remain in exactly the same position during treatment. The aim of the present study was to analyze miniscrew position changes
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Long-term effectiveness of non-surgical open-bite treatment: a systematic review and meta-analysis Prog. Orthod. (IF 4.8) Pub Date : 2023-06-01 Maria-Zoi Theodoridou, Athanasia-Eirini Zarkadi, Vasileios F. Zymperdikas, Moschos A. Papadopoulos
The etiology of open bite is complex, involving various genetic or environmental factors. Several treatment alternatives have been suggested for the correction of open bite, yet their long-term effectiveness remains controversial. To assess the long-term effectiveness of open-bite treatment in treated with non-surgical approaches versus untreated patients, through lateral cephalometric radiographs
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Correlation between dental arch form and OSA severity in adult patients: an observational study Prog. Orthod. (IF 4.8) Pub Date : 2023-05-29 Domenico Ciavarella, Alessandra Campobasso, Elisa Conte, Giuseppe Burlon, Laura Guida, Graziano Montaruli, Michele Cassano, Michele Laurenziello, Gaetano Illuzzi, Michele Tepedino
The role of interdental widths and palatal morphology on the development of obstructive sleep apnea (OSA) has not been well investigated in adult patients yet. The aim of this paper was to assess the morphology of maxilla and mandibular dental arches on three-dimensional (3D) casts and to correlate these measurements with the severity of OSA. Sixty-four patients (8 women and 56 men, mean age 52.4)
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The effect of maxillary molar distalization with clear aligner: a 4D finite-element study with staging simulation Prog. Orthod. (IF 4.8) Pub Date : 2023-05-15 Bochun Mao, Yajing Tian, Yujia Xiao, Jing Li, Yanheng Zhou
Long-term simulation of tooth movement is crucial for clear aligner (CA) treatment. This study aimed to investigate the effect of maxillary molar distalization with CA via an automatic staging simulation. A finite-element method (FEM) model of maxillary dentition, periodontal ligaments, attachments, and corresponding CA was established, and a prescribed 2-mm distalization with 0.1 mm each step of the
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Spontaneous changes in mandibular incisor crowding from mixed to permanent dentition: a systematic review Prog. Orthod. (IF 4.8) Pub Date : 2023-05-08 Cibelle Cristina Oliveira dos Santos, Renata Travassos da Rosa Moreira Bastos, Silvio Augusto Bellini-Pereira, Daniela Garib, David Normando
Dental crowding is the most prevalent malocclusion in the mixed and permanent detitions and can have a major impact on dentofacial esthetics. However, adjustments to the development and growth of the dentition can potentiate self-correction of dental crowding during childhood. To evaluate the physiological behavior of mandibular incisor crowding in the transition from mixed to permanent dentition.
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Accurate gingival segmentation from 3D images with artificial intelligence: an animal pilot study Prog. Orthod. (IF 4.8) Pub Date : 2023-05-01 Min Yang, Chenshuang Li, Wen Yang, Chider Chen, Chun-Hsi Chung, Nipul Tanna, Zhong Zheng
Gingival phenotype plays an important role in dental diagnosis and treatment planning. Traditionally, determining the gingival phenotype is done by manual probing of the gingival soft tissues, an invasive and time-consuming procedure. This study aims to evaluate the feasibility and accuracy of an alternatively novel, non-invasive technology based on the precise 3-dimension (3D) soft tissue reconstruction
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Accumulated biomechanical effects of mandibular molar mesialization using clear aligners with auxiliary devices: an iterative finite element analysis Prog. Orthod. (IF 4.8) Pub Date : 2023-04-10 Xinwei Lyu, Xing Cao, Luxian Chen, Yuyao Liu, Huilin Li, Cheng Hu, Jiali Tan
The biomechanics generated by the clear aligner (CA) material changes continuously during orthodontic tooth movement, but this factor remains unknown during the computer-aid design process and the predictability of molars movement is not as expected. Therefore, the purpose of this study was to propose an iterative finite element method to simulate the long-term biomechanical effects of mandibular molar
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Effectiveness of clear aligners in achieving proclination and intrusion of incisors among Class II division 2 patients: a multivariate analysis Prog. Orthod. (IF 4.8) Pub Date : 2023-04-03 Xinyu Yan, Xiaoqi Zhang, Linghuan Ren, Yi Yang, Qingxuan Wang, Yanzi Gao, Qingsong Jiang, Fan Jian, Hu Long, Wenli Lai
The predictability of incisor movement achieved by clear aligners among Class II division 2 patients is poorly understood. The aim of this retrospective study was to determine the effectiveness of clear aligners in proclining and intruding upper incisors and its influencing factors. Eligible patients with Class II division 2 malocclusion were included. For clear aligner therapy, three types of incisor
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The transparency of reporting 'harms' encountered with the surgically assisted acceleration of orthodontic tooth movement in the published randomized controlled trials: a meta-epidemiological study Prog. Orthod. (IF 4.8) Pub Date : 2023-03-21 Doa’a Tahseen Alfailany, Mohammad Younis Hajeer, Khaldoun Darwich
Surgical-assisted accelerated orthodontics (SAAO) has become very popular recently. Therefore, this study aimed to investigate the extent to which researchers adhere to Item 19 (harms) of the Consolidated Standards of Reporting Trials (CONSORT) in the published studies in the field of SAAO. In addition, the study evaluated the possible association between harm reporting and the human development index
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Incisor irregularity and dental arch dimensions changes in subjects with different severity of anterior crowding: a 37-year follow-up Prog. Orthod. (IF 4.8) Pub Date : 2023-03-20 Caroline Martins Gambardela-Tkacz, Gabriela Alcaraz, Paula Cotrin, Karina Maria Salvatore de Freitas, Willana Moura, Guilherme Janson, Daniela Garib, Marcos Roberto de Freitas
Occlusal stability is one of the goals of orthodontic treatment, and keeping teeth aligned in the long term is a challenge for the orthodontist. This study aimed to compare the long-term incisors irregularity and dental arches dimensions changes in subjects treated with 4 premolar extractions with different pretreatment Little's irregularity index (LII). The knowledge of long-term outcomes is evidence-based
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Effects of IPR by mechanical oscillating strips system on biological structures: a quantitative and qualitative evaluation Prog. Orthod. (IF 4.8) Pub Date : 2023-03-13 Francesca Gazzani, Denise Bellisario, Laura Fazi, Alessia Balboni, Silvia Licoccia, Chiara Pavoni, Paola Cozza, Roberta Lione
To evaluate by means of profilometric analysis and scanning electronic microscope (SEM) the effects on enamel surfaces of oscillating mechanical systems for interproximal enamel reduction (IPR). Fifteen complete (Group 1) oscillating IPR sequence and 15 single metallic strips (Group 2) for active IPR phase of 0.2 mm were selected and tested on 30 freshly extracted teeth by means of tribological tests
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Comparison of the effects of different rapid maxillary expansion techniques on craniofacial structures: a finite element analysis study Prog. Orthod. (IF 4.8) Pub Date : 2023-03-06 Nihal Kaya, Elif Dilara Seker, Türker Yücesoy
To compare the effects of three different maxillary expansion appliances with five different types of expansion modalities on stress distribution and displacement on the maxilla and its adjacent craniofacial structures using the finite element method (FEM). Cone-beam computed tomography data of a patient with maxillary transverse deficiency were rendered into a three-dimensional model of craniomaxillary
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Stress distribution and displacement in the maxillofacial complex during intrusion and distalization of the maxillary arch using miniplates versus mini-implants: a 3-dimensional finite element study Prog. Orthod. (IF 4.8) Pub Date : 2023-03-01 Abinaya Somaskandhan, N M. Vijay Kumar, R. Devaki Vijayalakshmi
To three-dimensionally analyse the stress distribution and displacement pattern in the maxillofacial complex following intrusion and distalization of the maxillary arch using finite element analysis in skeletal class II malocclusion with prognathic maxilla and vertical maxillary excess using miniplates and mini-implants. Finite Element models of a skull, Y-shaped stainless steel miniplate, mini-implant
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A quantitative three-dimensional comparative study of alveolar bone changes and apical root resorption between clear aligners and fixed orthodontic appliances Prog. Orthod. (IF 4.8) Pub Date : 2023-02-27 Ibtehal Almagrami, Abeer A. Almashraqi, Bushra Sufyan Almaqrami, Amin S. Mohamed, Khaled Wafaie, Maher Al-Balaa, Yiqiang Qiao
This study aimed to evaluate and compare the alveolar bone changes and to investigate the prevalence and severity of orthodontically induced inflammatory root resorption (OIIRR) of maxillary incisors in patients who received treatment with clear aligners (CA) versus conventional fixed appliances (FA), using cone-beam computed tomography (CBCT). One hundred sixty maxillary incisors from 40 patients
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Stress and movement trend of lower incisors with different IMPA intruded by clear aligner: a three-dimensional finite element analysis Prog. Orthod. (IF 4.8) Pub Date : 2023-02-13 Yixin Li, Shengzhao Xiao, Yu Jin, Cheng Zhu, Ruomei Li, Yikan Zheng, Rongjing Chen, Lunguo Xia, Bing Fang
During the intrusion of lower incisors with clear aligners (CAs), root disengagement from the alveolar bone often occurs, resulting in serious complications. This study aimed to determine the potential force mechanism of the mandibular anterior teeth under the pressure of CA, providing theoretical data for clinical practice. In this study, a 3D finite element model was established, including the CA
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The effect of orthodontic treatment on smile attractiveness: a systematic review Prog. Orthod. (IF 4.8) Pub Date : 2023-02-06 G. Coppola, I. Christopoulou, N. Gkantidis, C. Verna, N. Pandis, G. Kanavakis
Smile attractiveness is a primary factor for patients to seek orthodontic treatment, however, there is yet no systematic evaluation of this topic in the literature. To assess the current evidence on the effect of orthodontic treatment on smile attractiveness. Seven electronic databases (MEDLINE, Cochrane Library, Virtual Health Library, SCOPUS, Web of Science, Google Scholar and Embase) were searched
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A retrospective comparison of two protocols for correction of skeletal Class III malocclusion in prepubertal children: hybrid hyrax expander with mandibular miniplates and rapid maxillary expansion with face mask Prog. Orthod. (IF 4.8) Pub Date : 2023-01-23 Nour Eldin Tarraf, Oyku Dalci, Kerem Dalci, Ayse Tuba Altug, M. Ali Darendeliler
This study compared the skeletal and dental effects of a hybrid maxillary expander with mandibular miniplates (HE-MP) and Class III elastics to conventional tooth-borne rapid maxillary expander and face mask (RME–FM) in skeletal Class III treatment. This retrospective study included 36 skeletal Class III patients. Eighteen patients (mean age 10.24 ± 1.31 years) were treated with a hybrid expander,
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Predictability of orthodontic tooth movement with aligners: effect of treatment design Prog. Orthod. (IF 4.8) Pub Date : 2023-01-16 Castroflorio, Tommaso, Sedran, Ambra, Parrini, Simone, Garino, Francesco, Reverdito, Matteo, Capuozzo, Riccardo, Mutinelli, Sabrina, Grybauskas, Simonas, Vaitiekūnas, Mantas, Deregibus, Andrea
The present study was designed to define: (1) which are the less predictable OTM with Invisalign aligners when the treatment plan is designed by expert operators, (2) if the presence and shape of attachments influence the predictability of OTM and (3) if patients’ demographics influence OTM predictability. The sample comprises 79 prospectively recruited patients (mean age 30.8 years; SD 12.0; 23 M
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IPR treatment and attachments design in clear aligner therapy and risk of open gingival embrasures in adults Prog. Orthod. (IF 4.8) Pub Date : 2023-01-09 Zhang, Yubohan, Wang, Xu, Wang, Jihong, Gao, Jie, Liu, Xulin, Jin, Zuolin, Ma, Yanning
The incidence of open gingival embrasures (OGE) in patients after fixed appliance treatment is relatively high, while there are no detailed reports on patients after clear aligner therapy. Also, no clinical studies with large sample size have investigated whether interproximal enamel reduction (IPR) can actually avoid OGE. The purpose of this study was to determine the prevalence of OGE in adults after
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Role of mechano-sensitive non-coding RNAs in bone remodeling of orthodontic tooth movement: recent advances Prog. Orthod. (IF 4.8) Pub Date : 2022-12-30 Yan, Lichao, Liao, Li, Su, Xiaoxia
Orthodontic tooth movement relies on bone remodeling and periodontal tissue regeneration in response to the complicated mechanical cues on the compressive and tensive side. In general, mechanical stimulus regulates the expression of mechano-sensitive coding and non-coding genes, which in turn affects how cells are involved in bone remodeling. Growing numbers of non-coding RNAs, particularly mechano-sensitive