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Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie

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https://www.readbyqxmd.com/read/28091721/influence-of-tooth-dimension-on-the-initial-mobility-based-on-plaster-casts-and-x-ray-images-a-numerical-study
#1
Martin Hartmann, Cornelius Dirk, Susanne Reimann, Ludger Keilig, Anna Konermann, Andreas Jäger, Christoph Bourauel
AIMS: The goal was to determine the influence of different geometric parameters of the tooth on the initial tooth mobility and the position of the center of resistance employing numerical models based on scaled X-ray images and plaster casts. METHODS: The dimensions of tooth 21 were measured in 21 patients, using radiographs and dental casts. Length and mesiodistal width of the tooth were obtained from the X-ray image and the orovestibular diameter from the plaster cast...
January 13, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28084515/soft-tissue-effects-of-three-different-class-ii-1-camouflage-treatment-strategies
#2
Ezgi Atik, Bengisu Akarsu-Guven, Ilken Kocadereli
OBJECTIVE: Aim of this retrospective study was to compare soft tissue effects of Class II treatments with the forsus fatigue resistant device (FRD), the pendulum appliance, and the extraction of two maxillary premolars, all of which were combined with pre-adjusted fixed appliances. PATIENTS AND METHODS: The sample of 54 patients with Class II malocclusions was divided in three groups: group I patients (mean age = 15.91 years) were treated with the FRD concurrently used with fixed appliances; group II patients (mean age = 16...
January 13, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28084514/dental-angle-class-asymmetry-and-temporomandibular-disorders
#3
Daniele Manfredini, Luca Lombardo, Giuseppe Siciliani
OBJECTIVES: The aim of this study was to determine whether there is an association between the presence of asymmetric molar or canine Angle classes on the two sides and the presence of temporomandibular joint dysfunction (TMD). MATERIALS AND METHODS: Participants to the study were divided into two groups: TMD group (90 patients) or a control group (58 patients). In the TMD group, clinical assessment for TMD was performed according to the Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) guidelines by the same two trained examiners...
January 13, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28084513/erratum-to-patient-survey-on-invisalign-%C3%A2-treatment-comparing-the-smarttrack-%C3%A2-material-to-the-previously-used-aligner-material
#4
Anne-Kathrin Bräscher, Dietmar Zuran, Robert E Feldmann, Justus Benrath
No abstract text is available yet for this article.
January 13, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28074260/accuracy-and-reproducibility-of-measurements-on-plaster-models-and-digital-models-created-using-an-intraoral-scanner
#5
Leonardo Tavares Camardella, Hero Breuning, Oswaldo de Vasconcellos Vilella
AIM: The purpose of the present study was to evaluate the accuracy and reproducibility of measurements made on digital models created using an intraoral color scanner compared to measurements on dental plaster models. METHODS: This study included impressions of 28 volunteers. Alginate impressions were used to make plaster models, and each volunteers' dentition was scanned with a TRIOS Color intraoral scanner. Two examiners performed measurements on the plaster models using a digital caliper and measured the digital models using Ortho Analyzer software...
January 10, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27999895/internal-derangement-in-the-temporomandibular-joint-of-juveniles-with-clinical-signs-of-tmd-mri-assessed-association-with-skeletal-and-dental-classes
#6
Steffen Stein, Andreas Hellak, Nenad Popović, Douglas Toll, Michael Schauseil, Andreas Braun
AIM: The aim of this study was to investigate possible correlation of specific skeletal or dental class in children and adolescents with clinical signs of temporomandibular dysfunction (TMD) with the severity of internal derangement (ID) of the temporomandibular joint. MATERIALS AND METHODS: Based on MRI images, the ID of 232 juvenile temporomandibular joints in 116 patients were retrospectively recorded. The distribution of the ID stages within the skeletal and dental classes was compared by means of the χ (2) test...
December 20, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27957595/soft-tissue-changes-in-the-orofacial-region-after-rapid-maxillary-expansion-a-cone-beam-computed-tomography-study
#7
Gülşilay Sayar Torun
OBJECTIVE: Rapid maxillary expansion (RME) is usually used for expanding the maxillary bony segments. Many studies have assessed the dental and skeletal effects of the expansion treatment but few studies evaluated soft tissue changes using cone beam computed tomography (CBCT) images. This study aims to compare soft tissue changes after RME in prepubertal and postpubertal subjects using CBCT images. The null hypothesis of this study is there is no difference between prepubertal and postpubertal patients in soft tissue changes after RME treatment...
December 12, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27942768/mechanical-properties-of-different-esthetic-and-conventional-orthodontic-wires-in-bending-tests-an-in-vitro-study
#8
Ahmad Alobeid, Cornelius Dirk, Susanne Reimann, Tarek El-Bialy, Andreas Jäger, Christoph Bourauel
AIMS: The goal of this study was to determine the mechanical properties of different esthetic and conventional orthodontic wires in three-point and four-point bending tests, and in a biomechanical test employing three bracket systems. METHODS: The behavior of round wires with a diameter of 0.46 mm (0.018″) were investigated: uncoated nickel titanium (NiTi) wires, surface modified NiTi wires; FLI(®) Orthonol Wire(®) and glass fiber reinforced plastic wires. The biomechanical bending test was performed using the following bracket types: metal brackets (Discovery(®), Dentaurum), ceramic brackets (Fascination(®), Dentaurum), and plastic brackets (Elegance(®), Dentaurum)...
December 9, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27921118/can-different-occlusal-positions-instantaneously-impact-spine-and-body-posture-a-pilot-study-using-rasterstereography-for-a-three-dimensional-evaluation
#9
Karoline März, Werner Adler, Ragai-Edward Matta, Linda Wolf, Manfred Wichmann, Bastian Bergauer
PURPOSE: Orthodontists influence dental occlusion directly. To suggest any link between dental occlusion and body posture is highly contentious, as evidenced by the literature. Rasterstereography, an optical technique that enables three-dimensional (3D) body measurements to be collected, has not yet been used to impartially examine whether different occlusal positions could instantaneously alter spine and body posture. We therefore set out to use this technique to nonsubjectively evaluate this question under static conditions...
December 5, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27909759/continuous-hydrostatic-pressure-induces-differentiation-phenomena-in-chondrocytes-mediated-by-changes-in-polycystins-sox9-and-runx2
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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/27844113/mitteilungen-der-dgkfo
#20
(no author information available yet)
No abstract text is available yet for this article.
November 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
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