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    7800 results match your criteria American Journal of Orthodontics and Dentofacial Orthopedics [Journal]

    1 OF 156

    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

    Miniscrew biomechanics: Guidelines for the use of rigid indirect anchorage mechanics.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):413-419
    Orthopaedic Bioengineering Laboratory, Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio.
    Indirect anchorage is an established form of anchorage provided by orthodontic miniscrews. Although there are different ways to set up the mechanics, rigid indirect anchorage offers the greatest biomechanical versatility but is more difficult to install than conventional, nonrigid indirect anchorage or direct anchorage. The purpose of this article was to introduce readers to the concept of rigid indirect anchorage and provide guidelines as to its use. Read More

    Fixed-functional appliance treatment combined with growth hormone therapy.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):402-412
    Department of Orthodontics, Dental Research Institute and School of Dentistry, Seoul National University, Seoul, Korea; private practice, Seoul, Korea. Electronic address:
    The purpose of this study was to illustrate the effects of growth hormone (GH) therapy and fixed functional appliance treatment in a 13-year-old Class II malocclusion patient without GH deficiency. GH has been shown to effectively increase endochondral growth and induce a more prognathic skeletal pattern. Although a major concern in Class II retrognathic patients is chin deficiency, long-term studies have shown that the mandibular growth enhancement effects of functional appliances are clinically insignificant. Read More

    Combined orthodontic-orthopedic treatment of an adolescent Class II Division 2 patient with extreme deepbite using the Forsus Fatigue Resistant Device.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):389-401
    Department of Orthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey. Electronic address:
    Class II Division 2 malocclusion is often characterized by severe, traumatic deepbite with lingually inclined and overerupted incisors. Combined orthodontic-orthopedic treatment of this malocclusion is a challenging issue for orthodontists. This case report describes the combined orthodontic-orthopedic treatment of an adolescent Class II Division 2 patient with an extreme deepbite and a retrognathic mandible using the Forsus Fatigue Resistant Device. Read More

    Genome-wide association study for mandibular prognathism using microsatellite and pooled DNA method.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):382-388
    Department of Orthodontics, Division of Oral Functional Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.
    Introduction: The purpose of this study was to extend an association study from chromosome 1 to the whole genome (genome-wide association study) to find susceptibility loci of mandibular prognathism.

    Methods: Two hundred forty patients diagnosed with mandibular prognathism and 360 healthy controls of Japanese descent were recruited. The typing of microsatellites covering the whole genome was conducted using a pooled DNA method. Read More

    Three-dimensional evaluation of the airway spaces in patients with and without cleft lip and palate: A digital volume tomographic study.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):371-381
    Department of Orthodontics and Dentofacial Orthopedics, Vidya Shikshan Prasarak Mandal's Dental College, Nagpur, India.
    Introduction: Patients with cleft lip and palate (CLP) suffer from several esthetic and functional challenges. Comprehensive treatment of these patients involves orthognathic surgery that may lead to velopharyngeal insufficiency or reduction in lower airway. Several cases of airway insufficiency, velopharyngeal incompetence, snoring, hypopnea, and obstructive sleep apnea have been reported in subjects with CLP. Read More

    Assessment of upper airway size after orthopedic treatment for maxillary protrusion or mandibular retrusion.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):364-370
    Department of Orthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
    Introduction: The aim of this retrospective study was to find out whether different Class II treatments would affect the airway sizes of patients having maxillary protrusion or mandibular retrusion.

    Methods: The study sample comprised 57 Class II patients whose upper airway sizes were not significantly different at the start of treatment and whose sagittal skeletal jaw relationships showed that they had maxillary protrusion or mandibular retrusion. Twenty-two of them were treated with cervical headgear, 16 with activator, and 19 were selected as a control. Read More

    A simple and accurate craniofacial midsagittal plane definition.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):355-363
    School of Orthodontics, Unversity of Detroit Mercy, Detroit, Mich.
    Introduction: In this article, we aimed to establish an ideal definition for the craniofacial midsagittal plane (MSP) by first finding an optimal "plane of best fit" and then deriving a simple approximation for clinical use that is highly accurate.

    Methods: For 60 adolescent patients, 3-dimensional coordinates of 8 central landmarks and 6 pairs of lateral landmarks were collected. Across all patients, the coplanarity of the central landmarks was compared with that of the midpoints of the lateral landmarks. Read More

    Root resorptions associated with canine retraction treatment.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):348-354
    Department of Biostatistics, Indiana University, Indianapolis, Ind.
    Introduction: The hypothesis of this study was that multiple factors are dominant in causing external apical root resorption (EARR). The objective of this investigation was to better understand the clinical factors that may lead to EARR.

    Methods: Maxillary cone-beam computed tomography scans of 18 subjects who were treated with bilateral canine retractions during orthodontics were used to calculate EARR. Read More

    Three-dimensional assessment of soft tissue changes associated with bone-anchored maxillary protraction protocols.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):336-347
    Department of Orthodontics, College of Dentistry, University of Illinois at Chicago, Chicago, Ill.
    Introduction: The aim of this study was to assess the 3-dimensional soft tissue changes in growing Class III patients with maxillary deficiency associated with 2 bone-anchored maxillary protraction protocols in relation to an untreated control group of Class III patients.

    Methods: Growing skeletal Class III patients between the ages of 10 and 14 years participated in this study. In group 1 (n = 10), skeletally anchored facemasks were used with miniplates placed at the zygomatic buttress. Read More

    Bone-anchored maxillary protraction therapy in patients with unilateral complete cleft lip and palate: 3-dimensional assessment of maxillary effects.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):327-335
    Department of Orthodontics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil.
    Introduction: The aim of this study was to 3-dimensionally assess the treatment outcomes of bone-anchored maxillary protraction (BAMP) in patients with unilateral cleft lip and palate.

    Methods: The cleft group comprised 24 patients with unilateral cleft lip and palate and Class III malocclusion with mean initial and final ages of 11.8 and 13. Read More

    Prevalence of extraction space reopening in different orthodontic treatment protocols.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):320-326
    Department of Orthodontics, Ingá Dental School, Maringá, Paraná, Brazil.
    Introduction: In this study, we aimed to compare the amount and frequency of extraction space reopening after 2- and 4-premolar extraction treatments in Class II and 4-premolar extractions in Class I malocclusion patients.

    Methods: The sample comprised 105 subjects with full-cusp Class II and Class I malocclusions, divided into 3 groups. Group 1 consisted of 33 full-cusp Class II malocclusion patients treated with a 2-premolar extraction protocol. Read More

    Quantitative analysis of enamel on debonded orthodontic brackets.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):312-319
    Orthodontic Unit, Melbourne Dental School, University of Melbourne, Melbourne, Australia; private practice, Melbourne, Australia. Electronic address:
    Introduction: Iatrogenic damage to the tooth surface in the form of enamel tearouts can occur during removal of fixed orthodontic appliances. The aim of this study was to assess debonded metal and ceramic brackets attached with a variety of bonding materials to determine how frequently this type of damage occurs.

    Methods: Eighty-one patients close to finishing fixed orthodontic treatment were recruited. Read More

    Influence of cortical bone thickness on miniscrew microcrack formation.
    Am J Orthod Dentofacial Orthop 2017 Sep;152(3):301-311
    Department of Orthodontics, University of Adelaide, Adelaide, South Australia, Australia.
    Introduction: The aim of this in-vitro study was to investigate the influence of cortical bone thickness on the amount of surface microdamage produced after insertion of orthodontic miniscrews (OM) in porcine tibia bone.

    Methods: Aarhus OMs (Medicon, Tuttlingen, Germany; diameter, 1.5 mm; length, 6 mm) were inserted into 1. Read More

    Orthodontic-surgical retreatment of facial asymmetry with occlusal cant and severe root resorption: A 3-year follow-up.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):268-280
    Department of Orthodontics, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
    Our objective was to report the orthodontic and surgical retreatment of a patient who had undergone a prolonged orthodontic treatment with extractions, but who had unsatisfactory results and persistent side effects. The man, aged 25 years 3 months, sought treatment with major complaints of facial and smile asymmetries. The clinical examination showed a mandibular deviation to the right and a maxillary occlusal cant. Read More

    Surgery-first approach in correcting skeletal Class III malocclusion with mandibular asymmetry.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):255-267
    Department of Orthodontics, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, Calif. Electronic address:
    This case report describes a surgical orthodontic case that used the recently introduced surgery-first approach to correct a severe skeletal Class III malocclusion. A 19-year-old woman presented with severe mandibular prognathism and facial asymmetry; she had been waiting for growth completion in order to pursue surgical correction. After prediction of the postsurgical tooth movement and surgical simulation, 2-jaw surgery that included maxillary advancement and differential mandibular setback was performed using a surgery-first approach. Read More

    Surgery-first orthognathic approach vs traditional orthognathic approach: Oral health-related quality of life assessed with 2 questionnaires.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):250-254
    Maxillo-Facial Unit, Complesso Integrato Columbus, Catholic University of Sacred Heart, Rome, Italy.
    Introduction: The purposes of the study were to investigate and evaluate the differences detected by the patients between the traditional orthognathic approach and the surgery-first one in terms of level of satisfaction and quality of life.

    Methods: A total of 30 patients who underwent orthognathic surgery for correction of malocclusions were selected and included in this study. Fifteen patients were treated with the conventional orthognathic surgery approach, and 15 patients with the surgery-first approach. Read More

    Influence of different setups of the Frankfort horizontal plane on 3-dimensional cephalometric measurements.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):242-249
    Department of Surgery, School of Medical Sciences, University of Campinas, Campinas, São Paulo, Brazil.
    Introduction: The Frankfort horizontal (FH) is a plane that intersects both porions and the left orbitale. However, other combinations of points have also been used to define this plane in 3-dimensional cephalometry. These variations are based on the hypothesis that they do not affect the cephalometric analysis. Read More

    Effects of unilateral premolar extraction treatment on the dental arch forms of Class II subdivision malocclusions.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):232-241
    Department of Orthodontics, Boston University, Boston, Mass. Electronic address:
    Introduction: A retrospective study evaluating posttreatment symmetry in dental arch form and midlines was carried out in Class II subdivision patients treated with unilateral and bilateral maxillary premolar extractions.

    Methods: Using Geomagic (version 14; Geomagic, Research Triangle Park, NC) and MATLAB (version 8.4; MathWorks, Natick, Mass) software, best-fit curves expressed as quartic polynomials were generated for 13 Class II subdivisions treated with unilateral extractions and 20 treated with bilateral maxillary premolar extractions. Read More

    Prognosis of primary and secondary insertions of orthodontic miniscrews: What we have learned from 500 implants.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):224-231
    Department of Orthodontic Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
    Introduction: Although the success of using orthodontic miniscrews for primary insertion has been reported in the literature, few studies have followed up on secondary insertions after failure of the first insertion. In this study, we investigated not only the primary but also secondary success rates of miniscrews and considered the risk factors influencing their stability.

    Methods: Five hundred miniscrews were inserted for orthodontic anchorage in 240 patients. Read More

    Idiopathic condylar resorptions: 3-dimensional condylar bony deformation, signs and symptoms.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):214-223
    Section of Orthodontics, Faculty of Health Sciences, Aarhus University, Aarhus, Denmark; Department of Oral and Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Denmark.
    Introduction: Our aim was to describe 3-dimensional condylar deformation of the temporomandibular joint (TMJ) and symptoms and signs of temporomandibular dysfunction (TMD) in patients with idiopathic condylar resorption (ICR).

    Methods: We included 25 patients with ICR and 25 controls. We performed cone-beam computed tomographic scans and analyzed condylar width, length, and height as well as the condylar axial angle and the condylar neck angle. Read More

    Rate of tooth movement and dentoskeletal effects of rapid canine retraction by dentoalveolar distraction osteogenesis: A prospective study.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):204-213
    Private practice, Antalya, Turkey.
    Introduction: The purpose of this study was to test the null hypothesis that duration of orthodontic treatment can be significantly reduced by accelerating canine retraction using dentoalveolar distraction (DAD).

    Methods: Thirty-six maxillary canines of 19 patients comprised the DAD group, and 28 canines of 14 patients were included in the distalization group (DG). The initial mean ages were 15. Read More

    Prediction of long-term success of orthopedic treatment in skeletal Class III malocclusions.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):193-203
    Department of Orthodontics, Gangnam Severance Dental Hospital, Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea. Electronic address:
    Introduction: We investigated the long-term success of orthopedic treatment in skeletal Class III malocclusions, established a model to predict its long-term success, and verified previously reported success rates and prediction models.

    Methods: Fifty-nine patients who underwent successful facemask treatment and were followed until growth completion were evaluated. After completion of growth, the patients were divided into successful and unsuccessful groups according to overjet, overbite, and facial profile. Read More

    Effects of Case Western Reserve University's transverse analysis on the quality of orthodontic treatment.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):178-192
    Department of Orthodontics, School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio. Electronic address:
    Introduction: The purpose of this study was to evaluate the effect of using the transverse analysis developed at Case Western Reserve University (CWRU) in Cleveland, Ohio. The hypotheses were based on the following: (1) Does following CWRU's transverse analysis improve the orthodontic results? (2) Does following CWRU's transverse analysis minimize the active treatment duration?

    Methods: A retrospective cohort research study was conducted on a randomly selected sample of 100 subjects. The sample had CWRU's analysis performed retrospectively, and the sample was divided according to whether the subjects followed what CWRU's transverse analysis would have suggested. Read More

    Risk factors for tobacco susceptibility in an orthodontic population: An exploratory study.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):171-177
    Center for Behavioral Epidemiology and Community Health, San Diego State University Research Foundation, San Diego, Calif.
    Introduction: Tobacco use is related to increased periodontal disease, tooth loss, and decreased success of orthodontic appliances, and it may inhibit orthodontic tooth movement. Most smokers start during adolescence. Since most cessation attempts fail, prevention appears necessary. Read More

    Individualized intervention to reduce anxiety in adult orthodontic patients based on Q methodology.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):161-170
    School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China; Discipline of Orthodontics, Oral Health Centre, University of Queensland, Brisbane, Queensland, Australia.
    Introduction: In this study, we used Q methodology to assess the concerns of adults seeking orthodontic treatment and to determine individualized interventions to reduce their anxiety.

    Methods: Statements of concern were derived by in-depth interviews with 70 adult patients. Q sorting methodology was then used to identify the main factors associated with anxiety in a cohort of 40 adults who had not been involved in the first part of the study. Read More

    Randomized controlled trial of a patient decision-making aid for orthodontics.
    Am J Orthod Dentofacial Orthop 2017 Aug;152(2):154-160
    Eastman Dental Hospital, University College London Hospitals Foundation Trust, London, United Kingdom.
    Introduction: Patient decision-making aids (PDAs) are instruments that facilitate shared decision making and enable patients to reach informed, individual decisions regarding health care. The objective of this study was to assess the efficacy of a PDA compared with traditional information provision for adolescent patients considering fixed appliance orthodontic treatment.

    Methods: Before treatment, orthodontic patients were randomly allocated into 2 groups: the intervention group received the PDA and standard information regarding fixed appliances, and the control group received the standard information only. Read More

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