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Samare Mortazavi, Hamed Asghari-Moghaddam, Mahboobe Dehghani, Mohammadreza Aboutorabzade, Banafshe Yaloodbardan, Elahe Tohidi, Seyed-Hosein Hoseini-Zarch
Background: Hyoid bone plays a significant role in physiological functions of craniofacial region and it's position adapts to changes of the head. The purpose of this study was to determine the position of the hyoid bone among subjects with class I, class II and class III skeletal patterns and evaluate the gender differences. Material and Methods: One hundred and ten lateral cephalograms (59 females and 51 males) from different skeletal patterns (class I, II and III) were selected...
April 2018: Journal of Clinical and Experimental Dentistry
P Grogger, C Sacher, S Weber, G Millesi, R Seemann
Deviations in measuring dentofacial components in a lateral X-ray represent a major hurdle in the subsequent treatment of dysgnathic patients. In a retrospective study, we investigated the most prevalent source of error in the following commonly used cephalometric measurements: the angles Sella-Nasion-Point A (SNA), Sella-Nasion-Point B (SNB) and Point A-Nasion-Point B (ANB); the Wits appraisal; the anteroposterior dysplasia indicator (APDI); and the overbite depth indicator (ODI). Preoperative lateral radiographic images of patients with dentofacial deformities were collected and the landmarks digitally traced by three independent raters...
April 10, 2018: International Journal of Oral and Maxillofacial Surgery
Mohammed Ed-Dhahraouy, Hicham Riri, Manal Ezzahmouly, Farid Bourzgui, Abdelmajid El Moutaoukkil
OBJECTIVE: The aim of this study was to develop a new method for an automatic detection of reference points in 3D cephalometry to overcome the limits of 2D cephalometric analyses. MATERIALS AND METHODS: A specific application was designed using the C++ language for automatic and manual identification of 21 (reference) points on the craniofacial structures. Our algorithm is based on the implementation of an anatomical and geometrical network adapted to the craniofacial structure...
April 5, 2018: International Orthodontics
Kevin J Robertson, Bernardino M Mendez, William J Bruce, Brendan D McDonnell, Michael V Chiodo, Parit A Patel
OBJECTIVE: This study compares the change in midface position following Le Fort III advancement using either rigid external distraction (group 1) or internal distraction (group 2). We hypothesized that, with reference to right-facing cephalometry, internal distraction would result in increased clockwise rotation and inferior displacement of the midface. DESIGN: Le Fort III osteotomies and standardized distraction protocols were performed on 10 cadaveric specimens per group...
January 1, 2018: Cleft Palate-craniofacial Journal
Hsueh-Yu Li, Li-Ang Lee, Eric J Kezirian, Meiho Nakayama
Suspension palatoplasty, a new surgical technique to treat obstructive sleep apnea (OSA), has been developed to correct the retropalatal obstruction in patients with small tonsils (grade I/II) and anterior-posterior palatal (A-P) obstruction. The objecteive of this preliminary study was to investigate the effectiveness and change in retropalatal airway dimensions after suspension palatoplasty. This retrospective case series study included 25 consecutive male adults with OSA. Unique technical features of suspension palatoplasty are exposure of pterygomandibular raphe and suspension of palatopharyngeus muscle to the raphe...
March 9, 2018: Scientific Reports
Sung Chan Kim, Jin Geun Kwon, Woo Shik Jeong, Diane Na, Jong Woo Choi
BACKGROUND: Recently, the mandibular body and chin shape are known to be important issue as well as the mandibular angle. The authors have performed the one-piece mandibuloplasty from the mandibular angle to the most anterior part of chin to achieve the change of the whole mandibular shape as a one-piece. METHODS: All of 14 patients who complaint prominent mandibular angle and chin were randomly allocated into 2 groups. Group I (n = 7) was treated with conventional mandibuloplasty with narrowing genioplasty and Group II (n = 7) was treated with one-piece mandibuloplasty...
March 8, 2018: Journal of Craniofacial Surgery
Jesús Montúfar, Marcelo Romero, Rogelio J Scougall-Vilchis
INTRODUCTION: This article presents a novel technique for automatic cephalometric landmark localization on 3-dimensional (3D) cone-beam computed tomography (CBCT) volumes by using an active shape model to search for landmarks in related projections. METHODS: Twenty-four random CBCT scans from a public data set were imported and processed into Matlab (MathWorks, Natick, Mass). Orthogonal coronal and sagittal projections (digitally reconstructed radiographs) were created, and 2 trained active shape models were used to locate cephalometric landmarks on each...
March 2018: American Journal of Orthodontics and Dentofacial Orthopedics
Willian Saranholi da Silva, Ana Lúcia Pompéia Fraga de Almeida, Maria Giulia Rezende Pucciarelli, Karin Hermana Neppelenbroek, Juliana Dreyer da Silva de Menezes, Renato Yassutaka Faria Yaedú, Thais Marchini Oliveira, Flavia M R N Cintra, Simone Soares
This retrospective observational study aimed to evaluate and identify the relapse rate after orthognathic surgery for maxillary advancement (Le Fort I maxillary osteotomy) in oral cleft patients through digitized cephalograms and 3D dental models, following 2 years. Lateral cephalograms and dental casts of 17 individuals, enrolled in Orthodontics Department in Hospital of Rehabilitation of Craniofacial Anomalies, were carried out. The digital cephalometric tracings were evaluated in: T1-before surgery, T2-immediate after surgery, T3-6-month to 1-year after surgery...
March 1, 2018: Odontology
Min-Jeong Cho, Rami R Hallac, Jananie Ramesh, James R Seaward, Nuno V Hermann, Tron A Darvann, Angelo Lipira, Alex A Kane
BACKGROUND: Restoring craniofacial symmetry is an important objective in the treatment of many craniofacial conditions. Normal form has been measured using anthropometry, cephalometry, and photography, yet all of these modalities have drawbacks. In this study, the authors define normal pediatric craniofacial form and craniofacial asymmetry using stereophotogrammetric images, which capture a densely sampled set of points on the form. METHODS: After institutional review board approval, normal, healthy children (n = 533) with no known craniofacial abnormalities were recruited at well-child visits to undergo full head stereophotogrammetric imaging...
March 2018: Plastic and Reconstructive Surgery
M A Postnikov, D A Trunin, N V Pankratova, A M Nesterov, M I Sadykov, S A Ostankov
The diagnostics and treatment of malocclusion Class III in patients aged 6-12 is an vital problem in orthodontics. Method of orthodontic treatment of malocclusion Class III in patients with the help of improved and patented orthodontic construction - 'Postnikov appliance' - and face mask and bracket system is analysed in the article. Orthodontic treatment of malocclusion Class III was examined in 24 patients aged 6-12 by the suggested method. All patients were examined clinically and with the help af additional diagnostic methods: head cephalometry in lateral position with further data analysis in Dolphin Imaging (USA)...
2018: Stomatologii︠a︡
Alexandre Meireles Borba, Everton José da Silva, André Luis Fernandes da Silva, Michael D Han, Maria da Graça Naclério-Homem, Michael Miloro
PURPOSE: To verify predicted versus obtained surgical movements in 2-dimensional (2D) and 3-dimensional (3D) measurements and compare the equivalence between these methods. MATERIALS AND METHODS: A retrospective observational study of bimaxillary orthognathic surgeries was performed. Postoperative cone-beam computed tomographic (CBCT) scans were superimposed on preoperative scans and a lateral cephalometric radiograph was generated from each CBCT scan. After identification of the sella, nasion, and upper central incisor tip landmarks on 2D and 3D images, actual and planned movements were compared by cephalometric measurements...
January 12, 2018: Journal of Oral and Maxillofacial Surgery
Giacomo De Riu, Paola Ilaria Virdis, Silvio Mario Meloni, Aurea Lumbau, Luigi Angelo Vaira
INTRODUCTION: The purpose of this study was to retrospectively evaluate the difference between the planned and the actual movements of the jaws, using three-dimensional (3D) software for PC-assisted orthognathic surgery, to establish the accuracy of the procedure. MATERIAL AND METHODS: A retrospective study was performed with 49 patients who had undergone PC-guided bimaxillary surgery. The accuracy of the protocol was determined by comparing planned movements of the jaws with the actual surgical movements, analysing frontal and lateral cephalometries...
February 2018: Journal of Cranio-maxillo-facial Surgery
Julie Levasseur, Johan Nysjö, Ronak Sandy, Jonathan A Britto, Nicolas Garcelon, Samer Haber, Arnaud Picard, Pierre Corre, Guillaume A Odri, Roman H Khonsari
Orbito-palpebral reconstruction is a challenge in Treacher Collins syndrome (TCS). This study investigates orbital phenotypes in TCS using cephalometry and orbital shape analysis. Eighteen TCS and 52 control patients were included in this study, using the Dr Warehouse database. Orbital cephalometry was based on 20 landmarks, 10 planes, 16 angles, and 22 distances. Orbits were segmented. Registration-based, age-specific mean models were generated using semi-automatic segmentation, and aligned and compared using color-coded distance maps - mean absolute distance (MAD), Hausdorff distance (HD), and Dice similarity coefficient (DSC)...
February 2018: Journal of Cranio-maxillo-facial Surgery
Susanne Nahles, Martin Klein, Anke Yacoub, Julia Neyer
BACKGROUND: The incidence of plagiocephaly has increased in the 25 years since the "Back to Sleep" campaign in 1991 to prevent sudden infant death. Plagiocephaly is not considered to be a pathological condition. It is more of an esthetic impairment and could have potentially negative psychological or psychosocial consequences; therefore, treatment is recommended. The aim of this study is to compare conventional anthropometry and laser scanning - two different measurement methods - as diagnostic instruments for plagiocephaly...
January 2018: Journal of Cranio-maxillo-facial Surgery
Pisha Pittayapat, Reinhilde Jacobs, Michael M Bornstein, Guillaume A Odri, Ivo Lambrichts, Guy Willems, Constantinus Politis, Raphael Olszewski
Background: To assess the reproducibility of landmarks in three dimensions that determine the Frankfort horizontal plane (FH) as well as two new landmarks, and to evaluate the angular differences of newly introduced planes to the FH. Methods: Three-dimensional (3D) surface models were created from CBCT scans of 26 dry human skulls. Porion (Po), orbitale (Or), internal acoustic foramen (IAF), and zygomatico-maxillary suture (ZyMS) were indicated in the software by three observers twice with a 4-week interval...
September 7, 2017: European Journal of Orthodontics
K M Shishkin, O I Arsenina, M K Shishkin, N V Popova
The aim of the study was to assess the efficacy of cephalometry in planning of orthodontic patients with teeth crowding (TC) and Angle Class I molar relationship (MR). Cephalometric values of 70 patients with TC and class I MR were analyzed before and after orthodontic treatment. Cephalometric study of correlations proved to be more relevant than comparing with mean values. In patients with TC and class I MR statistically significant were correlations with: facial profile (ÐN-A-B) and jaws relationship in anterio-posterior direction (ÐA-N-B); ÐN-A-B and type of maxillary growth (ÐPn-Mp, ÐB); ÐB and maxillary incisors inclination (Ðis-SpP); ÐPn-Mp and mandibular incisors inclination (Ðii-Mp)...
2017: Stomatologii︠a︡
Arvind Tripathi, Soumyojeet Bagchi, Juhi Singh, Suryakant Tripathi, Narendra Kumar Gupta, Varun Arora
PURPOSE: To estimate the incidence of obstructive sleep apnea (OSA) in elderly edentulous patients (aged 60-65 years) and investigate a correlation of serum serotonin levels with the apnea-hypopnea index (AHI), respiratory effort-related arousal (RERA), and respiratory disturbance index (RDI). MATERIALS AND METHODS: 381 elderly completely edentulous patients (307 male, 74 female) aged 60 to 65 years with a history of edentulism of 12 to 15 months, seeking oral rehabilitation at the prosthodontic clinic at Saraswati Dental College & Hospital, Lucknow, India, between January 2014 and January 2016 were enrolled for the present study...
August 21, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Pooja Mehta, Roshan M Sagarkar, Silju Mathew
INTRODUCTION: Cephalometry has many limitations of which radiation exposure is most important. Hence, there is a need to resort to other safer methods which could give equal if not better results. AIM: The purpose of this study was to compare and correlate the craniofacial measurements obtained from cephalometric radiographs and analogous measurements from standardized facial profile photographs in skeletal class II cases. MATERIALS AND METHODS: A total of 30 lateral cephalograms and profile photographs of patients exhibiting skeletal class II malocclusion, in the age group of 19-25 years of age, were examined in this study using Dolphin software (version 11...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
Roselaine Sprenger, Luciano Augusto Cano Martins, Júlio Cesar Bento Dos Santos, Carolina Carmo de Menezes, Giovana Cherubini Venezian, Viviane Veroni Degan
BACKGROUND: Craniofacial growth pattern has been correlated with variations in size of the upper airway spaces. The objective of this study was to evaluate the nasopharyngeal, oropharyngeal, and hypopharyngeal airway spaces variations according to the craniofacial growth pattern, by comparing brachyfacial, mesofacial, and dolichofacial in Angle Class I individuals. METHODS: To measure the spaces, 45 lateral teleradiographs were used and divided into 3 groups per the craniofacial growth pattern, determined by the Tweed cephalometry angular measurements: FMA and Y-axis...
December 2017: Progress in Orthodontics
Rodrigo Mologni Gonçalves Dos Santos, José Mario De Martino, Francisco Haiter Neto, Luis Augusto Passeri
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. We investigated the validity of this hypothesis. METHODS: The material included cone-beam computed tomography data sets of 82 adult subjects with Class I molar relationship...
August 2017: American Journal of Orthodontics and Dentofacial Orthopedics
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