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    7845 results match your criteria American Journal of Orthodontics and Dentofacial Orthopedics [Journal]

    1 OF 157

    Three-camera setup to record simultaneously standardized high-definition video for smile analysis.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):711-716
    Department of Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, The Netherlands.
    Introduction: Our objective was to develop a photographic setup that would simultaneously capture subjects' smiles from 3 views, both statically and dynamically, and develop a software to crop the produced video clip and slice the frames to study the smile at different stages.

    Methods: Facial images were made of 96 subjects, aged 18 to 28 years, in natural head position using a standardized setup of 3 digital single lens reflex cameras, with a reference sticker (10 × 10 mm) on the forehead of each subject. To test the reproducibility of the setup, 1 operator took 3 images of all subjects on the same day and on 3 different days in a subset of 26 subjects. Read More

    Adverse clinical events reported during Invisalign treatment: Analysis of the MAUDE database.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):706-710
    Stead Family Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, Iowa.
    Introduction: The objectives of this study were to examine adverse clinical events after the use of the Invisalign system and to provide an overview of the actions taken by the manufacturer to address these events.

    Methods: A retrospective analysis of the Manufacturer and User Facility Device Experience database of the United States Food and Drug Administration was used. All medical device reports reported to the United States Food and Drug Administration pertaining to products of Align Technology from November 1, 2006, to November 30, 2016, were analyzed. Read More

    Nonsurgical treatment of an adult with a skeletal Class II gummy smile using zygomatic temporary anchorage devices and improved superelastic nickel-titanium alloy wires.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):693-705
    Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
    Patients with a severe gummy smile and a skeletal Class II profile are difficult to treat. This case report describes an effective treatment alternative for improving a gummy smile in a patient with a severe Class II molar relationship, severe crowding, and lip protrusion using zygomatic anchorage devices and improved superelastic nickel-titanium wires. A 36-year-old woman had an excessive overjet and a deep overbite with a bilateral Angle Class II molar relationship. Read More

    Miniscrew-assisted multidisciplinary orthodontic treatment with surgical mandibular advancement and genioplasty in a brachyfacial Class II patient with mandibular asymmetry.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):679-692
    Orthodontics Department, University of Medicine and Dentistry of Valencia, Valencia, Spain.
    This article describes the complex dental treatment of a 43-year-old man with skeletal Class II, mandibular asymmetry, severe brachyfacial pattern, Class II Division 2, canting of the occlusal plane, and an increased curve of Spee. To achieve optimal results, we adopted a multidisciplinary approach to treatment, involving periodontics, oral surgery, orthodontics, maxillofacial surgery, and prosthetics specialists. After periodontal treatment, miniscrews were placed to correct the occlusal plane canting and the excessive curve of Spee with orthodontic treatment. Read More

    Children's orthodontic utilization in the United States: Socioeconomic and surveillance considerations.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):672-678
    Department of Mathematics and Statistics, Loyola University, Chicago, Ill.
    Introduction: There has been no epidemiologic study of malocclusion prevalence and treatment need in the United States since the Third National Health and Nutrition Examination Survey, conducted from 1988 to 1991. In this descriptive study, the authors sought to estimate orthodontic treatment prevalence by examining a nationally representative survey to assess current pediatric dental and orthodontic utilization.

    Methods: The 2009 and 2013 Medical Expenditure Panel Surveys were used to categorize and compare all types of pediatric dental and orthodontic procedures in children and adolescents up to 20 years old. Read More

    Long-term stability of Class II treatment with the Jasper jumper appliance.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):663-671
    Department of Orthodontics, Bauru Dental School, University of São Paulo, São Paulo, Brazil.
    Introduction: Treatment of Class II Division 1 malocclusion with orthopedic devices combined with fixed orthodontic appliances has shown excellent results when used in growing patients. We aimed to evaluate the long-term stability of the cephalometric changes obtained during Class II malocclusion correction with the Jasper jumper associated with fixed appliances.

    Methods: The treatment group comprised 24 patients who were evaluated at 3 stages: pretreatment, posttreatment, and long-term posttreatment. Read More

    Protein and mRNA expressions of IL-6 and its key signaling factors under orthodontic forces in mice: An in-vivo study.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):654-662
    State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China. Electronic address:
    Introduction: The purpose of this study was to investigate the mechanical loading-induced changes in protein and mRNA expressions of interleukin-6 (IL-6) and its key signaling factors glycoprotein 130 (gp130), signal transducer and activator of transcription 3 (STAT3), and the Src homology phosphotyrosine phosphatase (SHP2) at the tension and compression sides of the teeth in mouse models.

    Methods: A total of 55 C57B/6 mice (10 weeks old) were divided into 3 groups. Orthodontic force was applied in group A (experimental group, n = 30); the tooth movement device was placed without activation in group B (sham control group, n = 15), and group C (blank control group, n = 10). Read More

    Clinical recognition of mouth breathers by orthodontists: A preliminary study.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):646-653
    Department of Orthodontics, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil. Electronic address:
    Introduction: A routine diagnosis of a patient's breathing status performed by an orthodontist normally includes visual assessment, medical history, clinical examination of habitual lip posture, size and shape of the nostrils, reflex control of the alar muscle and respiratory tests, and the dental mirror test. The objective of this study was to test the recognition of mouth breathers in young persons by an orthodontist and agreement with an otolaryngologist's reference diagnosis when routine assessments were carried out.

    Methods: Three independent and blind evaluations were conducted on the same day by 2 orthodontists independently (anamnesis and breathing tests, respectively) and an otolaryngologist (rhinoscopy, nasal endoscopy, and visual assessment). Read More

    ENPP1 and ESR1 genotypes associated with subclassifications of craniofacial asymmetry and severity of temporomandibular disorders.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):631-645
    Department of Orthodontics, Temple University, Philadelphia, Pa. Electronic address:
    Introduction: We investigated whether ACTN3, ENPP1, ESR1, PITX1, and PITX2 genes which contribute to sagittal and vertical malocclusions also contribute to facial asymmetries and temporomandibular disorders (TMD) before and after orthodontic and orthognathic surgery treatment.

    Methods: One hundred seventy-four patients with a dentofacial deformity were diagnosed as symmetric or subdivided into 4 asymmetric groups according to posteroanterior cephalometric measurements. TMD examination diagnosis and jaw pain and function (JPF) questionnaires assessed the presence and severity of TMD. Read More

    Effects of low-level laser irradiation on the rate of orthodontic tooth movement and associated pain with self-ligating brackets.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):622-630
    Prosthodontic Unit, School of Dental Sciences, Universiti Sains Malaysia, Health Campus, Kota Bharu, Kelantan, Malaysia.
    Introduction: The aim of this study was to evaluate the effect of low-level laser irradiation applied at 3-week intervals on orthodontic tooth movement and pain associated with orthodontic tooth movement using self-ligating brackets.

    Methods: Twenty-two patients (11 male, 11 female; mean age, 19.8 ± 3. Read More

    Perinatal health and malocclusions in preschool children: Findings from a cohort of adolescent mothers in Southern Brazil.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):613-621
    Postgraduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil. Electronic address:
    Introduction: Pregnancy in adolescence has long-term consequences that can negatively influence oral conditions. In this study, we aimed to assess malocclusion in deciduous dentition and its association with prolonged breastfeeding, pacifier use, and perinatal health indicators pertaining to the periods immediately before and after birth.

    Methods: This cross-sectional study was nested in a cohort of adolescent mothers who became pregnant from 13 to 19 years of age (mean age, 17. Read More

    Numeric simulation model for long-term orthodontic tooth movement with contact boundary conditions using the finite element method.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):601-612
    Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
    Introduction: Although many attempts have been made to simulate orthodontic tooth movement using the finite element method, most were limited to analyses of the initial displacement in the periodontal ligament and were insufficient to evaluate the effect of orthodontic appliances on long-term tooth movement. Numeric simulation of long-term tooth movement was performed in some studies; however, neither the play between the brackets and archwire nor the interproximal contact forces were considered. The objectives of this study were to simulate long-term orthodontic tooth movement with the edgewise appliance by incorporating those contact conditions into the finite element model and to determine the force system when the space is closed with sliding mechanics. Read More

    In-vivo determination of critical force levels using an intraoral electromechanical device to measure nonpathologic tooth mobility.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):592-600
    Private practice, Okahandja, Namibia.
    Introduction: An electromechanical device was used to experimentally characterize the movement of a single tooth within the periodontal ligament space. The force magnitude leading to the complete compression of the periodontal ligament is considered a critical force and is designated Fc. We investigated the effectiveness of the electromechanical device to repeatedly determine the critical force magnitude Fc. Read More

    Effectiveness of pulsed electromagnetic field for pain caused by placement of initial orthodontic wire in female orthodontic patients: A preliminary single-blind randomized clinical trial.
    Am J Orthod Dentofacial Orthop 2017 Nov;152(5):582-591
    Department of Orthodontics, School of Dentistry, University of Wonkwang, Wonkwang Dental Research Institute, Iksan, Korea; Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A. T. Still University, Mesa, Ariz. Electronic address:
    Introduction: The purpose of this 2-arm parallel trial was to assess the effects of pulsed electromagnetic field (PEMF) on the reduction of pain caused by initial orthodontic tooth movement.

    Methods: Thirty-three female patients (mean age, 16.8 ± 3. Read More

    Effect of print layer height and printer type on the accuracy of 3-dimensional printed orthodontic models.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):557-565
    Department of Orthodontics, School of Dentistry; Graduate School of Biomedical Sciences, University of Texas Health Science Center at Houston, Houston, Tex. Electronic address:
    Introduction: Three-dimensional (3D) printing technologies enable production of orthodontic models from digital files; yet a range of variables associated with the process could impact the accuracy and clinical utility of the models. The objective of this study was to investigate the effect of print layer height on the accuracy of orthodontic models printed 3 dimensionally using a stereolithography format printer and to compare the accuracy of orthodontic models fabricated with several commercially available 3D printers.

    Methods: Thirty-six identical models were produced with a stereolithography-based 3D printer using 3 layer heights (n = 12 per group): 25, 50, and 100 μm. Read More

    Odontogenic keratocyst: The role of the orthodontist in the diagnosis of initial lesions.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):553-556
    Department of Clinical and Preventive Dentistry, School of Dentistry, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil. Electronic address:
    Odontogenic keratocysts (OKCs) are locally infiltrative odontogenic cysts that are usually diagnosed during routine radiographic examinations. Therefore, it is critical that dental practitioners, in particular orthodontists, recognize and diagnose OKCs to recommend appropriate treatment. This report describes a patient whose OKC was not initially identified during orthodontic pretreatment. Read More

    Maxillary and mandibular dentoalveolar expansion with an auxiliary beta-titanium arch.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):543-552
    Division of Pediatric Dentistry, School of Dentistry, University of Minnesota, Minneapolis, Minn.
    Traditionally, adult patients with mild to moderate transverse discrepancies are treated with a combination of slow maxillary expansion with palatal appliances and expanded archwires. In this case report, we describe an alternative approach for anterior crowding and excessive buccal corridors in a 20-year-old man who was treated using a beta-titanium auxiliary expansion archwire. The perceived benefit of this approach was related not only to the esthetic improvement of the smile resulting from elimination of the anterior crowding and reduction of the buccal corridors, but also to the minimal disruption of the patient's speech, which was his main functional concern. Read More

    Facial improvement after mandibular midline distraction and surgically assisted rapid maxillary expansion.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):523-542
    Department of Orthodontics and Craniofacial Biology, Radboud University Medical Centre, Nijmegen, The Netherlands. Electronic address:
    This case report describes the retreatment of a 49-year-old woman with severe crowding in the mandibular incisor region and tapered maxillary and mandibular arches. Treatment consisted of mandibular midline distraction and surgically assisted rapid maxillary expansion to increase arch length. The need for proper presurgical orthodontics is described, and the complications during treatment are discussed. Read More

    What are people tweeting about orthodontic retention? A cross-sectional content analysis.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):516-522
    Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom. Electronic address:
    Introduction: Social media can offer valuable insights in relation to the perceptions and impact of medical treatments on patient groups. There is also a lack of information concerning patient experiences with orthodontic retainers and little appreciation of barriers to optimal compliance with orthodontic retention. The aim of this study was to describe the content of Twitter posts related to orthodontic retainers. Read More

    Extraction of maxillary canines: Esthetic perceptions of patient smiles among dental professionals and laypeople.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):509-515
    Department of Orthodontics, Chesterfield Royal Hospital, Chesterfield, United Kingdom.
    Introduction: Maxillary canines are generally considered important both cosmetically and functionally. Most claims on the importance of maxillary canines, however, have been based on expert opinions and clinician-based studies. There are no scientific studies in the literature reporting on their cosmetic importance or how laypeople perceive a smile treated by maxillary canine extractions. Read More

    Alveolar bone morphology of maxillary central incisors near grafted alveolar clefts after orthodontic treatment.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):501-508.e1
    Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.
    Introduction: The aim of this study was to evaluate the thickness and the height of the maxillary central incisors' alveolar bone near the grafted alveolar cleft area, after comprehensive orthodontic treatment.

    Methods: The sample comprised 30 patients with unilateral alveolar cleft with a mean age of 20.5 years (range, 17-25. Read More

    Efficacy of combined orthodontic-periodontic treatment for patients with periodontitis and its effect on inflammatory cytokines: A comparative study.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):494-500
    Department of Stomatology, Dongying People's Hospital, Dongying, China.
    Introduction: In this study, we aimed to investigate the efficacy of combined orthodontic-periodontic treatment in the treatment of patients with periodontitis and its effects on the levels of inflammatory cytokines.

    Methods: A total of 117 patients with periodontitis were randomly assigned to the basic group (receiving basic periodontic treatment, n = 58) and the combined group (receiving combined orthodontic-periodontic treatment, n = 59). In addition, 52 healthy people without periodontal disease were selected as the normal group. Read More

    Assessment of the root apex position of impacted maxillary canines on panoramic films.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):489-493
    Department of Orthodontics, Dental Research Institute, Pusan National University Dental Hospital, Yangsan, South Korea; Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Busan, South Korea; and Department of Orthodontics, Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea. Electronic address:
    Introduction: In this study, we aimed to analyze the root apex positions of impacted maxillary canines on panoramic radiographs according to their labiopalatal positions and to propose a new panoramic radiographic predictor of impacted maxillary canines.

    Methods: Paired panoramic films and cone-beam computed tomography images of 104 patients with unilateral impacted maxillary canines were selected. The sector locations of the impacted canine root apices on the panoramic radiographs were compared with the labiopalatal positions of impacted maxillary canines on cone-beam computed tomography. Read More

    Insertion torque and Periotest values are important factors predicting outcome after orthodontic miniscrew placement.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):483-488
    Department of Orthodontics, School of Dentistry, Aichi Gakuin University, Nagoya, Japan.
    Introduction: Approximately 14% of orthodontic anchor screws (miniscrews) become dislodged regardless of the accuracy of placement. It is therefore important to investigate the factors causing dislodgement. We evaluated the stability of miniscrews after placement to identify factors influencing outcome in orthodontic treatment using miniscrews. Read More

    Gingival enlargement in orthodontic patients: Effect of treatment duration.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):477-482
    Department of Social and Preventive Dentistry, Faculty of Odontology, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
    Introduction: In this study, we aimed to assess the effect of the duration of fixed orthodontic treatment on gingival enlargement (GE) in adolescents and young adults.

    Methods: The sample consisted of 260 subjects (ages, 10-30 years) divided into 4 groups: patients with no fixed orthodontic appliances (G0) and patients undergoing orthodontic treatment for 1 year (G1), 2 years (G2), or 3 years (G3). Participants completed a structured questionnaire on sociodemographic characteristics and oral hygiene habits. Read More

    Differences in attractiveness comparing female profile modifications of Class II Division 1 malocclusion.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):471-476
    Discipline of Orthodontics, Faculty of Dentistry, University of Sydney, Sydney, Australia.
    Introduction: Our objective was to study the perceptions of laypeople for digital alterations and the amount of nasolabial angle increase that is tolerable and how much chin-neck length increase is needed to achieve a desirable profile in Class II Division 1 women with mandibular retrognathia.

    Methods: The profile image of a white woman with a Class II Division 1 mandibular rethrognatic profile was digitally modified to create 6 images: 3 with stepwise increased nasolabial angles of 113°, 121°, and 129°, and 3 with stepwise increased chin-neck distances of 51, 54, and 57 mm. These images were assessed and ranked by 155 white laypeople. Read More

    Relationship between root resorption and individual variation in the calcium/phosphorous ratio of cementum.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):465-470
    Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan.
    Introduction: The purpose of this study was to investigate whether individual variation in the hardness and chemical composition of the cementum in the root apex affects the degree of root resorption.

    Methods: In a previous study, we evaluated the Vickers hardness scale of 50 extracted teeth. For this study, we classified the 50 extracted teeth into soft, moderate, and hard groups according to the Vickers hardness scale. Read More

    Evaluation of dehiscence and fenestration in adolescents affected by bilateral cleft lip and palate using cone-beam computed tomography.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):458-464
    Private practice, Antalya, Turkey.
    Introduction: We evaluated the dehiscence and fenestration presence in maxillary and mandibular anterior teeth of patients affected by bilateral cleft lip and palate (BCLP) and compared the findings with a well-matched control group of noncleft patients using cone-beam computed tomography.

    Methods: Cone-beam computed tomography images of 51 patients were divided into 2 groups (group 1, 21 patients affected by BCLP; mean age; 14.62 ± 2. Read More

    Comparison of in-vivo failure of single-thread and dual-thread temporary anchorage devices over 18 months: A split-mouth randomized controlled trial.
    Am J Orthod Dentofacial Orthop 2017 Oct;152(4):451-457
    Department of Orthodontics, Riphah International University, Islamabad, Pakistan.
    Introduction: The purpose of this study was to compare the in-vivo failure rates of single-thread and dual-thread temporary anchorage device (TAD) designs over 18 months.

    Methods: Thirty patients with skeletal Class II Division 1 malocclusion requiring anchorage from TADs for retraction of maxillary incisors into the extracted premolar space were recruited in this parallel group, split-mouth, randomized controlled trial. A block randomization sequence was generated with Random Allocation Software (version 2. Read More

    Accuracy of 3-dimensional curvilinear measurements on digital models with intraoral scanners.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):420-425
    School of Dental Medicine, Tufts University, Boston, Mass. Electronic address:
    Introduction: Our objectives were to evaluate and compare the digital dental models generated from 2 commercial intraoral scanners with manual measurements when performing 3-dimensional surface measurements along a curved line (curvilinear).

    Methods: Dry mandibles (n = 61) with intact dentition were used. The mandibles were digitized using 2 chair-side intraoral scanners: Cadent iTero (Align Technology, San Jose, Calif) and Lythos Digital Impression system (Ormco, Orange, Calif). Read More

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