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Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie

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https://www.readbyqxmd.com/read/27909759/continuous-hydrostatic-pressure-induces-differentiation-phenomena-in-chondrocytes-mediated-by-changes-in-polycystins-sox9-and-runx2
#1
Konstantinos Karamesinis, Anastasia Spyropoulou, Georgia Dalagiorgou, Maria A Katsianou, Marjan Nokhbehsaim, Svenja Memmert, James Deschner, Heleni Vastardis, Christina Piperi
PURPOSE: The present study aimed to investigate the long-term effects of hydrostatic pressure on chondrocyte differentiation, as indicated by protein levels of transcription factors SOX9 and RUNX2, on transcriptional activity of SOX9, as determined by pSOX9 levels, and on the expression of polycystin-encoding genes Pkd1 and Pkd2. MATERIALS AND METHODS: ATDC5 cells were cultured in insulin-supplemented differentiation medium (ITS) and/or exposed to 14.7 kPa of hydrostatic pressure for 12, 24, 48, and 96 h...
December 1, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27909758/release-of-fluoride-from-orthodontic-adhesives-and-penetration-into-enamel
#2
Panita Suebsureekul, Smorntree Viteporn
OBJECTIVE: The purpose of this work was to compare fluoride release from three orthodontic adhesives and fluoride penetration into the enamel surface. MATERIALS AND METHODS: A total of 156 extracted human premolar teeth were randomly assigned to three experimental groups and one control group (without bonding) with 39 teeth per group. Brackets were bonded to teeth using Fuji Ortho LC(®), Illuminate(®), or Light Bond(®). The amount of fluoride released (ppm) into artificial saliva was measured by a fluoride ion-selective electrode connected to an ion analyzer on days 1, 3, 7, and 30...
December 1, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27896419/effects-of-enamel-sealing-on-shear-bond-strength-and-the-adhesive-remnant-index-study-of-three-fluoride-releasing-adhesives-in-combination-with-metal-and-ceramic-brackets
#3
Elisabeth Hofmann, Laura Elsner, Ursula Hirschfelder, Thomas Ebert, Sebastian Hanke
OBJECTIVES: Selected combinations of materials were used to create tooth-adhesive-bracket complexes to evaluate shear bond strength (SBS) and the adhesive remnant index (ARI) with regard to enamel sealing. METHODS: Four adhesive systems also appropriate for use as enamel sealants were combined with four bracket types, resulting in 16 adhesive-bracket combinations, each of which was tested on 15 permanent bovine incisors. Sealant-adhesives included two recently introduced fluoride-releasing systems (Riva bond LC(®) and go!(®)), one established primer (Opal(®) Seal™), and one commonly used adhesive as control (Transbond™ XT)...
November 28, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27896418/effects-of-two-different-removable-functional-appliances-on-depth-of-the-posterior-airway-space-a-retrospective-cephalometric-study
#4
Jan Hourfar, Gero Stefan Michael Kinzinger, Luisa Katharina Meißner, Jörg Alexander Lisson
OBJECTIVES: Aim of the study was the comparison of treatment effects upon pharyngeal depth in patients treated with either (1) S-II-appliance or (2) Activator. METHODS: Pre- and posttreatment lateral cephalograms of 73 patients were analyzed using a customized set of measurements. According to predefined criteria, patients were either treated with S-II-appliance or Activator. Pharyngeal depth was assessed from cranial to caudal at six levels (P1 to P6). Paired t tests were used for intragroup and t tests for independent samples for intergroup comparisons...
November 28, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27896417/age-assessment-based-on-third-molar-mineralisation-an-epidemiological-radiological-study-on-a-central-european-population
#5
Elisabeth Hofmann, Matthias Robold, Peter Proff, Christian Kirschneck
PURPOSE: The method published in 1973 by Demirjian et al. to assess age based on the mineralisation stage of permanent teeth is standard practice in forensic and orthodontic diagnostics. From age 14 onwards, however, this method is only applicable to third molars. No current epidemiological data on third molar mineralisation are available for Caucasian Central-Europeans. Thus, a method for assessing age in this population based on third molar mineralisation is presented, taking into account possible topographic and gender-specific differences...
November 28, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27896416/prevalence-of-isolated-maxillary-lateral-incisor-agenesis-in-syrian-adolescents
#6
Tamouh Kabbani, Nagham Abdullah, Yasser Rsheadat, Mohamed Ibrahim Abu Hassan
PURPOSE: This research is designed to obtain a better understanding and provide more insight of this phenomenon through evaluating the prevalence of congenital absence of maxillary lateral incisors in a Syrian population. METHODS: The method involved clinical examination of 8000 school children with an equal number of males and females (age range 12-15 years) to identify students only affected by bilateral or unilateral congenital absence of maxillary lateral incisors...
November 28, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27858112/effects-of-sabbagh-universal-spring-2-fixed-functional-appliance-on-class-ii-1-patients-at-their-postpubertal-peak-growth-period-compared-with-the-extraction-method-a-randomized-clinical-trial
#7
Siamak Hemmatpour, Ali Mokhtar, Vahid Rakhshan
OBJECTIVE: The aim of this study was to evaluate the therapeutic effects of the Sabbagh Universal Spring 2 (SUS 2) fixed functional appliance compared to the premolar extraction method in correcting class II/1 malocclusion in patients who had passed their peak of postpubertal growth (stages 4-6 of Cervical Vertebral Maturation Index). METHODS: In all, 40 class II/1 patients were randomized to receive SUS 2 application (7 males, 13 females, age 15.75 ± 1.02 years) or maxillary premolar extraction (8 males, 12 females, age 15...
November 17, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27858111/therapeutic-accuracy-of-the-completely-customized-lingual-appliance-win-a-retrospective-cohort-study
#8
Alexander Pauls, Manuel Nienkemper, Rainer Schwestka-Polly, Dirk Wiechmann
OBJECTIVE: The aim of this retrospective cohort study was to assess the accuracy of the completely customized lingual appliance WIN (DW Lingual Systems, Bad Essen, Germany) employing a three-dimensional (3D) comparison between the setup and the final result. MATERIALS AND METHODS: The setup and final models of 20 consecutively debonded patients (40 jaws; 7 males, 13 females; mean age 15.76 ± 4.45 years) with various malocclusions of a private practice specialized in orthodontics were digitalized using a 3D scanner...
November 17, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27812721/assessment-of-facial-soft-tissue-profiles-based-on-lateral-photographs-versus-three-dimensional-face-scans
#9
Martin Fink, Ursula Hirschfelder, Veronika Hirschinger, Matthias Schmid, Caroline Spitzl, Andreas Detterbeck, Elisabeth Hofmann
OBJECTIVES: The purpose of this study was to compare two-dimensional (2D) lateral photographs versus three-dimensional (3D) face scans in analyzing facial profiles using Schwarz's concept of the jaw profile field (JPF) in its original 2D and in a modified 3D version. In addition, the distribution of the facial profile types described by Schwarz were examined. MATERIALS AND METHODS: Of 75 adult volunteers recruited specifically for this study, we obtained both photographs (Nikon D 300S; Nikon, Düsseldorf, Germany) and scans (FaceSCAN(3D) Scientific Photolab 60 Hz; 3D-Shape, Erlangen, Germany) in a standardized setting...
November 3, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27796401/geometric-morphometrics-of-different-malocclusions-in-lateral-skull-radiographs
#10
Josef Freudenthaler, Aleš Čelar, Christopher Ritt, Philipp Mitteröcker
BACKGROUND: To evaluate the role of craniofacial shape in malocclusion by application of geometric morphometrics to a set of two-dimensional landmarks and semilandmarks obtained from lateral skull radiographs. METHODS: Cephalometric radiograph tracings of 88 untreated Caucasians (age range 7-39 years) were assigned to four groups according to their occlusion: neutrocclusion, distocclusion, mesiocclusion, and anterior open bite. The geometric morphometric shape analysis incorporated 66 landmarks and semilandmarks, which underwent generalized Procrustes analysis, between-groups principal component analysis, thin-plate spline deformation grid visualization, permutation tests, and receiver operating characteristic curves...
October 31, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27778051/patient-survey-on-invisalign-%C3%A2-treatment-comparen-the-smarttrack-%C3%A2-material-to-the-previous-aligner-material
#11
Anne-Kathrin Bräscher, Dietmar Zuran, Robert E Feldmann, Justus Benrath
OBJECTIVES: In 2013, a novel material SmartTrack(®) was introduced to replace the previous material used for Invisalign(®) aligners. We conducted this study to test how this transition was accepted by patients during ongoing Invisalign(®) treatment. METHODS: We surveyed a total of 72 patients (68 % women, 32 % men, mean age: 29.3 ± 9.2 years) who had worn the new material for a mean of 6 months. They completed a questionnaire with 25 items that compared both materials in terms of pain, pressure upon insertion, comfort, mucosal irritation, phonetics, discoloration, and taste...
October 24, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27770150/upper-airway-changes-following-single-step-or-stepwise-advancement-using-the-functional-mandibular-advancer
#12
Isil Aras, Aylin Pasaoglu, Sultan Olmez, Idil Unal, Aynur Aras
OBJECTIVES: Purpose of the present study was to determine and compare possible changes in the dimensions of the pharyngeal airway, morphology of the soft palate, and position of the tongue and hyoid bone after single-step or stepwise mandibular advancement using the Functional Mandibular Advancer (FMA). PATIENTS AND METHODS: The sample included 51 peak-pubertal Class II subjects. In all, 34 patients were allocated to two groups using matched randomization: a single-step mandibular advancement group (SSG) and a stepwise mandibular advancement group (SWG)...
October 21, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27761588/post-treatment-changes-in-permanent-retention
#13
Michael Wolf, U Schulte, K Küpper, C Bourauel, L Keilig, S N Papageorgiou, C Dirk, C Kirschneck, N Daratsianos, A Jäger
OBJECTIVES: While permanent retention is today the method of choice to stabilize orthodontic treatment outcomes, recent studies have increasingly reported posttreatment changes in tooth position during permanent retention. We conducted this study to analyze changes in the anterior mandible, whether the changes follow an underlying movement pattern, and, aiming for a preventive strategy, whether any risk factors could be identified comparing findings with the pretreatment situations. METHODS: We included 30 patients who had worn fixed Twistflex retainers (UK 3-3) extending from canine to canine in the mandible...
October 19, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27752709/skeletal-effects-in-angle-class-ii-1-patients-treated-with-the-functional-regulator-type-ii-cephalometric-and-tensor-analysis
#14
Simone Schulz, Bernd Koos, Kathrin Duske, Franka Stahl
OBJECTIVES: The purpose of this work was to employ both cephalometric and tensor analysis in characterizing the skeletal changes experienced by patients with Angle Class II/1 malocclusion during functional orthodontic treatment with the functional regulator type II. METHODS: A total of 23 patients with Class II/1 malocclusion based on lateral cephalograms obtained before and after treatment with the functional regulator type II were analyzed. Another 23 patients with Angle Class II/1 malocclusion who had not undergone treatment were included as controls...
October 17, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27734089/efficacy-of-a-new-sealant-to-prevent-white-spot-lesions-during-fixed-orthodontic-treatment-a-12-month-single-center-randomized-controlled-clinical-trial
#15
Shaza M Hammad, Michael Knösel
BACKGROUND AND OBJECTIVE: White spot lesions (WSLs) are an undesirable side effect of fixed orthodontic appliance therapy and are reported to occur in 2-96 % of orthodontic patients. In this study, the efficacy of a new sealant to prevent WSLs during fixed orthodontic treatment was compared to a control group that did not receive sealant. PATIENTS AND METHODS: For this 2-arm parallel-group randomized trial, 50 subjects aged 12-18 years (mean age 14.57 ± 2...
October 12, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27844113/mitteilungen-der-dgkfo
#16
(no author information available yet)
No abstract text is available yet for this article.
November 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27595882/virtual-setup-application-in-orthodontic-practice
#17
Leonardo T Camardella, Eduardo Kant C Rothier, Oswaldo V Vilella, Edwin M Ongkosuwito, Karel Hero Breuning
BACKGROUND: A plaster dental model is a patient's traditional three-dimensional (3D) record. If the dental crowns from a plaster model are separated and positioned in wax, this setup of the crowns can be used to simulate orthodontic treatment. The traditional way to make this dental setup requires significant time by the orthodontist and in the orthodontic lab. New developments in dentistry and orthodontics include the possibility of virtual setups. AIM: In this article, the differences between conventional setups with plaster models and virtual setups are discussed...
September 5, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27535750/mitteilungen-der-dgkfo
#18
(no author information available yet)
No abstract text is available yet for this article.
September 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27502792/landmarks-of-the-frankfort-horizontal-plane-reliability-in-a-three-dimensional-cartesian-coordinate-system
#19
Elisabeth Hofmann, Rolf Fimmers, Matthias Schmid, Ursula Hirschfelder, Andreas Detterbeck, Klaus Hertrich
OBJECTIVES: The goal was to investigate whether the three-dimensional (3D) reliability of the landmarks defining the Frankfort horizontal plane (FH) can be enhanced by reducing variance with the help of nearby anatomical structures. METHODS: Twenty multislice computed tomography (MSCT) datasets of evidently symmetrical patients (11 female and 9 male patients, 6.1-16 years old) were selected from 695 datasets archived at our department. In the 3D reconstructions, we located the anthropometric landmarks orbitale and porion, then these were modified with the help of frontomalare temporale, radiculare and the most anterior border of the left and right external acoustic pore...
September 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27457710/dental-calcification-stages-as-determinants-of-the-peak-growth-period
#20
George Litsas, Athanasios E Athanasiou, Moschos A Papadopoulos, Ioulia Ioannidou-Marathiotou, Vassilis Karagiannis
OBJECTIVE: The objective of this study was to investigate the diagnostic accuracy of dental maturation stages for identifying individual-specific skeletal maturation phases. SUBJECTS AND METHODS: Prior to initiating this study, 255 orthodontic patients comprising 145 girls and 110 boys from the Department of Orthodontics, Aristotle University of Thessaloniki, Greece were identified. Lateral cephalometric and panoramic radiographs were evaluated. Dental calcification stages were assessed according to the Demirjian method and skeletal maturation according to the cervical vertebral maturation stage (CVMS) method...
September 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
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