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European Journal of Orthodontics

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https://www.readbyqxmd.com/read/28453722/accuracy-of-mdct-and-cbct-in-three-dimensional-evaluation-of-the-oropharynx-morphology
#1
Hui Chen, Maureen van Eijnatten, Ghizlane Aarab, Tim Forouzanfar, Jan de Lange, Paul van der Stelt, Frank Lobbezoo, Jan Wolff
Objective: To assess the accuracy of five different computed tomography (CT) scanners for the evaluation of the oropharynx morphology. Methods: An existing cone-beam computed tomography (CBCT) data set was used to fabricate an anthropomorphic phantom of the upper airway volume that extended from the uvula to the epiglottis (oropharynx) with known dimensions (gold standard). This phantom was scanned using two multi-detector row computed tomography (MDCT) scanners (GE Discovery CT750 HD, Siemens Somatom Sensation) and three CBCT scanners (NewTom 5G, 3D Accuitomo 170, Vatech PaX Zenith 3D)...
April 27, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28453618/long-term-effects-of-class-ii-herbst-treatment-on-the-pharyngeal-airway-width
#2
Christoph Drosen, Niko Christian Bock, Julia von Bremen, Hans Pancherz, Sabine Ruf
Objective: The aim was to assess the long-term effects of Class II malocclusion treatment with the Herbst appliance on the pharyngeal airway (PA) width in comparison to untreated individuals with Classes I and II malocclusion. Methods: Lateral cephalometric radiographs of 13 male Class II patients from before (T1) and after (T2) treatment with the Herbst appliance as well as after the end of growth (T3) were retrospectively analyzed and compared to two untreated age- and gender-matched samples with Class I (n = 13) or Class II (n = 13) malocclusion...
April 27, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28449060/the-influence-of-miniscrew-insertion-torque
#3
Melissa V Nguyen, John Codrington, Lloyd Fletcher, Craig W Dreyer, Wayne J Sampson
Objective: The aim of this in vitro study was to evaluate the progressive development of surface microdamage produced following the insertion of orthodontic miniscrews (OMs) into 1.5 mm thick porcine tibia bone using maximum insertion torque values of 12 Ncm, 18 Ncm, and 24 Ncm. Methods: Aarhus OMs (diameter 1.5 mm; length 6 mm) were inserted into 1.5 mm porcine bone using a torque limiting hand screwdriver set at 12 Ncm, 18 Ncm, and 24 Ncm. A custom rig equipped with a compression load cell was used to record the compression force exerted during manual insertion...
April 24, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28444179/a-novel-method-for-superimposition-and-measurements-on-maxillary-digital-3d-models-studies-on-validity-and-reliability
#4
Niels Ganzer, Ingalill Feldmann, Per Liv, Lars Bondemark
Background: Serial 3D models can be used to analyze changes, but correct superimposition is crucial before measurements can be assessed. Earlier studies show that every palatal structure changes due to growth or treatment. Here, we describe a new method that uses an algorithm-based analysis to perform superimpositions and measurements in maxillary 3D models. This method can be used to identify deformations. In a second step, only unchanged areas are used for superimposition. Objectives: This study investigates the validity and reliability of this novel method...
April 22, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28444165/proinflammatory-mediators-related-to-orthodontically-induced-periapical-root-resorption-in-rat-mandibular-molars
#5
Yoshiro Matsumoto, Siripen Sringkarnboriboon, Takashi Ono
Objectives: The early phase of orthodontic tooth movement involves acute inflammatory response that may induce bone resorption. The aim of this study was to localize and quantify cells in the periodontium expressing proinflammatory mediators during orthodontically induced periapical root resorption of the rat mandibular molars. Materials and methods: The levels of proinflammatory cytokines interleukin-1 (IL-1) α and β, tumor necrosis factor-α (TNF-α), inflammatory enzymes cyclooxygenase (COX) 1 and 2, and their product prostaglandin E2 (PGE2) in the root resorption site were compared to those in the corresponding area of the untreated periodontal ligament (PDL) of physiologically drifting teeth...
April 22, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28430896/evidence-of-secular-trend-in-mandibular-pubertal-growth
#6
Raphael Patcas, Daniel B Wiedemeier, Goran Markic, Philipp Beit, Heidi Keller
Background: During puberty, mandibular growth follows a growth curve comparable to somatic growth. This study aimed to review the relationship between mandibular pubertal peak height velocity (PHV) and skeletal age, and to investigate the possibility of a secular trend. Methods: Retrospective analysis was performed of two historical craniofacial growth studies (Denver Growth Study; observational time: 1943-1965, and Zurich Growth Study; observational time: 1982-1984) of healthy untreated subjects...
April 20, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28430887/measurement-of-forces-and-moments-around-the-maxillary-arch-for-treatment-of-a-simulated-lingual-incisor-and-high-canine-malocclusion-using-straight-and-mushroom-archwires-in-fixed-lingual-appliances
#7
Brandon Owen, Geoffry Gullion, Giseon Heo, Jason P Carey, Paul W Major, Dan L Romanyk
Introduction: An Orthodontic SIMulator (OSIM) was used to investigate the propagation of forces and moments around a simulated archform for a gingival displaced canine and lingual displaced lateral incisor using fixed lingual orthodontic appliances. Methods: In-Ovation L self-ligating lingual brackets were bonded to anatomically shaped teeth on the OSIM, and the teeth were positioned such that a G4 NiTi 0.016" large maxillary mushroom archwire could be ligated in passive position...
April 20, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28430890/acceptability-comparison-between-hawley-retainers-and-vacuum-formed-retainers-in-orthodontic-adult-patients-a-single-centre-randomized-controlled-trial
#8
Mohammed Saleh, Mohammad Y Hajeer, Dieter Muessig
Background: Hawley retainers (HRs) and vacuum formed retainers (VFRs) are the most commonly used removable retainers in the orthodontic practice. Patients' cooperation in wearing these appliances is affected by the levels of discomfort and oral impairment. The evidence regarding their acceptably among orthodontic patients is limited. Aims: To compare the acceptability of HRs and VFRs over a 6-month period in a group of fixed orthodontic patients. Trial Design: Two-arm parallel-group randomized controlled trial...
April 19, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28402521/efficiency-of-piezosurgery-technique-in-miniscrew-supported-en-masse-retraction-a-single-centre-randomized-controlled-trial
#9
Nilüfer Irem Tunçer, Ayça Arman-Özçirpici, Bahar Füsun Oduncuoglu, Jülide Sedef Göçmen, Alpdogan Kantarci
No abstract text is available yet for this article.
April 11, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28402422/introduction-and-assessment-of-orthognathic-information-clinic
#10
Nina Bergkulla, Heidi Hänninen, Outi Alanko, Martti Tuomisto, Jukka Kurimo, Aimo Miettinen, Anna-Liisa Svedström-Oristo, Susan Cunningham, Timo Peltomäki
Background/Objectives: Orthognathic treatment is routine practice to rehabilitate severe malocclusions and dentofacial deformities. Because orthognathic treatment is elective, patient's involvement in deciding whether to proceed with treatment is vital. Interaction and communication between patient and treating team plays a key role in achieving post-treatment satisfaction. To achieve satisfaction, an orthognathic 'information clinic' for prospective orthognathic patients was established at Oral and Maxillofacial Unit, Tampere University Hospital, Finland...
April 11, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28383705/an-exploratory-quality-assessment-of-orthodontic-clinical-guidelines-using-the-agree-ii-instrument
#11
Tasneem Tejani, Suhaym Mubeen, Jadbinder Seehra, Martyn T Cobourne
Objectives: Clinical guidelines act as a means of assisting clinicians in improving the quality of healthcare provided. We aim to assess the quality of currently available international orthodontic guidelines. Materials and methods: A cross-sectional systematic assessment of orthodontic clinical guidelines was undertaken. A Medline search using the keywords 'guideline', 'orthodontics', and 'dent', and search of specific dental and orthodontic organization websites for orthodontic-related clinical guidelines...
April 5, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28379334/impact-of-adenotonsillectomy-on-the-dentofacial-development-of-obstructed-children-a-systematic-review-and-meta-analysis
#12
Bibi E Becking, Jop P Verweij, Sonja M Kalf-Scholte, Cees Valkenburg, Eric W P Bakker, J P Richard van Merkesteyn
Background: Dentofacial deformities frequently require orthodontic treatment. Understanding of preventable risk factors is essential for reducing treatment need. Upper airway obstruction (for example due to hypertrophic adenoids and/or tonsils) has been hypothesized to be a risk factor. Objectives: This systematic review aimed to reflect the contemporary evidence on the risk of obstruction by hypertrophic adenoids and/or tonsils, by assessing the dentofacial changes after adeno- and/or tonsillectomy...
April 3, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28379399/the-nasopalatine-canal-a-limiting-factor-for-temporary-anchorage-devices-a-cone-beam-computed-tomography-data-study
#13
Raphael Tilen, Raphael Patcas, Michael M Bornstein, Björn Ludwig, Marc Schätzle
No abstract text is available yet for this article.
April 1, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28379386/instability-of-palatal-rugae-following-rapid-maxillary-expansion
#14
Maria Saadeh, Anthony Macari, Ramzi Haddad, Joseph Ghafari
Background: Existing evidence on changes of the palatal rugae following rapid maxillary expansion (RME) is scarce and inconclusive, particularly immediate post-expansion changes in three-dimensional assessments. Objectives: Our aims were to assess the dimensional stability of the palatal rugae in the antero-posterior and transverse dimensions following RME treatment, as well as the three-dimensional changes in palatal volume and area. Material and methods: The sample consisted of the dental casts of 30 adolescents (16 males; 14 females, age 11...
March 31, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28371880/the-impact-of-premature-birth-on-the-permanent-tooth-size-of-incisors-and-first-molars
#15
Eman Ebrahim, Liselotte Paulsson
Background: Scientific evidence is insufficient to answer the question of whether premature birth causes altered tooth-crown dimensions. Objective: To evaluate permanent tooth-crown dimensions in prematurely born children and to compare the findings with full-term born controls. Subjects and Methods: Preterm children of 8-10 years of age were selected from the Swedish Medical Birth Register. One group consisted of 36 extremely preterm children (born before the 29th gestational week); the other group included 37 very preterm children (born during gestational weeks 29-32)...
March 25, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28371848/negative-effect-of-malocclusion-on-the-emotional-and-social-well-being-of-brazilian-adolescents-a-population-based-study
#16
Jéssica Madeira Bittencourt, Letícia Pereira Martins, Cristiane Baccin Bendo, Miriam Pimenta Vale, Saul Martins Paiva
Background/objectives: The aesthetic impact of malocclusion can have negative repercussions on quality of life, social interaction, interpersonal relationships, and psychological well-being. The aim of this study was to evaluate the impact of malocclusion on the quality of life of Brazilian adolescents. Methods: A representative cross-sectional study of 1612 adolescents from Belo Horizonte, Minas Gerais was conducted. The adolescents responded to the Brazilian version of the Child Perception Questionnaire (CPQ11-14-ISF:16) to assess the impact of the condition on quality of life...
March 25, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28371800/three-dimensional-evaluation-of-the-maxillary-arch-and-palate-in-unilateral-cleft-lip-and-palate-subjects-using-digital-dental-casts
#17
Chiara Generali, Jasmina Primozic, Stephen Richmond, Maria Bizzarro, Carlos Flores-Mir, Maja Ovsenik, Letizia Perillo
Objectives: To assess arch width, palatal surface area, and volume in surgically treated unilateral cleft lip and palate (UCLP) in mixed dentition children in comparison with non-cleft lip and palate (NCLP) children using a 3D laser scanning. Materials and Methods: 38 subjects (Caucasian origin), 5.63-11.9 years of age (mean, 9.33 ± 1.67 years), were included. 19 in each group (UCLP and NCLP). Digital dental casts were obtained using a 3 Shape R700 laser scanner...
March 25, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28371839/excellent-versus-unacceptable-orthodontic-results-influencing-factors
#18
Katharina Klaus, Philipp Stark, Tara Suzan Paula Serbesis, Hans Pancherz, Sabine Ruf
Aim: To retrospectively compare patients with excellent and unacceptable orthodontic treatment results with respect to possible prognostic factors. Material and methods: All patients, who completed treatment at the Department of Orthodontics of the Justus-Liebig-University Giessen, Germany between 1993 and 2009 with an excellent or unacceptable outcome according to the Ahlgren index. Possibly influencing factors regarding case history, treatment, cephalometrics, and plaster casts were analyzed...
March 24, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28371882/efficiency-of-piezotome-corticision-assisted-orthodontics-in-alleviating-mandibular-anterior-crowding-a-randomized-clinical-trial
#19
Flavio Uribe, Leyla Davoody, Rana Mehr, Yasas S N Jayaratne, Khalid Almas, Takanori Sobue, Veerasathpurush Allareddy, Ravindra Nanda
Objectives: The aim of this clinical trial was to investigate the duration of mandibular-crowding alleviation with piezotome-corticision orthodontics compared with conventional orthodontics. Design: Single-centre, two-arm parallel group randomized controlled trial. Setting: Orthodontic clinic at the University of Connecticut. Ethical approval: The study was approved by the Institutional Review Board (IRB # 12-0147-2)...
March 20, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28340249/orthodontic-strain-affects-the-hippo-pathway-effector-yap-concomitant-with-proliferation-in-human-periodontal-ligament-fibroblasts
#20
Diana Huelter-Hassler, Pascal Tomakidi, Thorsten Steinberg, Britta A Jung
Objectives: During orthodontic tooth movement (OTM), human periodontal ligament fibroblasts (hPDLFs) sense, and respond to mechanical forces. Since the molecular constituents involved in these processes are not fully elucidated, the objective of the present study was to identify further key molecules of the cellular strain response. Materials and Methods: Primary hPDLFs were strained with a static equiaxial strain of 2.5 per cent for 15 minutes, 1 hour, 6 hours, and 24 hours...
March 17, 2017: European Journal of Orthodontics
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