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Cephalometry

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https://www.readbyqxmd.com/read/28337564/lower-face-cephalometry-based-on-quadrilateral-analysis-with-cone-beam-computed-tomography-a-clinical-pilot-study
#1
Adrienn Dobai, Tamás Vizkelety, Zsolt Markella, Adrienne Rosta, Ágnes Kucsera, József Barabás
OBJECTIVE: As most orthognathic surgeries focus on the lower face, the aim of this study was to transfer previously developed two-dimensional cephalometry-which is useful for surgeons in the orthognathic surgery of the lower face-to three-dimensional (3D) cephalometry by using cone-beam computed tomography (CBCT). We selected the quadrilateral lower face analysis developed by the surgeon Di Paolo, who focused only for the lower face and mentioned that data in millimeters are more easy to use than angles for surgeons...
March 23, 2017: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28321987/cephalometric-findings-among-children-with-velopharyngeal-dysfunction-following-adenoidectomy-a-retrospective-study
#2
Firas Kassem, Yaniv Ebner, Ben Nageris, Nezar Watted, Ari DeRowe, Ariela Nachmani
OBJECTIVES: To characterize the craniofacial structure by cephalometry, especially the skull base and nasopharyngeal space, in children who underwent adenoidectomy and developed persistent velopharyngeal dysfunction (VPD). DESIGN: Retrospective study. SETTING: Speech and swallowing clinic of a single academic hospital. PARTICIPANTS: 39 children with persistent VPD following adenoidectomy (mean age 8.0±3.6 years) and a control group of 80 healthy children...
March 21, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28271360/evaluation-of-the-influence-of-patient-positioning-on-the-reliability-of-lateral-cephalometry
#3
Ovidiu-Tiberiu David, Robert-Angelo Tuce, Oana Munteanu, Adrian Neagu, Irinel Panainte
Two-dimensional cephalometry is widely used for monitoring orthodontic treatments and for quantifying the outcome of maxillofacial surgery. Despite careful use of a cephalostat, successive radiographs might differ due to slight differences in patient posture. This study evaluates the reliability of lateral cephalometric measurements and estimates the impact of patient positioning on this reliability. We studied cephalograms of 104 patients; 31 of them had two radiographs because the first was deemed unsuitable for cephalometric analysis...
March 7, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28235540/determination-of-the-diagnostic-value-of-the-modified-mallampati-score-upper-lip-bite-test-and-facial-angle-in-predicting-difficult-intubation-a-prospective-descriptive-study
#4
Ata Mahmoodpoor, Hassan Soleimanpour, Samad Ej Golzari, Arezoo Nejabatian, Tannaz Pourlak, Masoumeh Amani, Saeed Hajmohammadi, Hamzeh Hosseinzadeh, Robab Mehdizadeh Esfanjani
BACKGROUND: Difficult intubation is a significant cause of mortality and morbidity related to anesthesia. We decided to evaluate the value of Modified Mallampati Score, Upper Lip Bite Test and Facial Angle in the prediction of difficult intubation. METHODS: In a prospective descriptive study, data from 132 patients who were candidates for elective maxillofacial surgeries under general anesthesia were gathered. Facial Angles were measured by a maxillofacial surgeon according to cephalometry...
February 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28224280/predictors-of-success-in-combination-of-tongue-base-resection-and-lateral-pharyngoplasty-for-obstructive-sleep-apnea
#5
Chi Sang Hwang, Jin Won Kim, Sang Chul Park, Hyo Jin Chung, Chang-Hoon Kim, Joo-Heon Yoon, Hyung-Ju Cho
The base of the tongue has been recognized as a significant site of obstruction in patients with obstructive sleep apnea (OSA). Our aim was to determine the independent predictors of surgical success in tongue base resection combined with lateral pharyngoplasty for OSA. Thirty-one OSA patients who underwent endoscopie-guided coblator or transoral robotic tongue base resection in combination with lateral pharyngoplasty for the treatment of retroglossal obstruction between March 2012 and December 2015 were enrolled in this study...
February 21, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28129408/contribution-of-fgfr1-variants-to-craniofacial-variations-in-east-asians
#6
Mohamed Adel, Tetsutaro Yamaguchi, Daisuke Tomita, Takatoshi Nakawaki, Yong-Il Kim, Yu Hikita, Shugo Haga, Masahiro Takahashi, Mohamed A Nadim, Akira Kawaguchi, Mutsumi Isa, Walid H El-Kenany, Abbadi A El-Kadi, Soo-Byung Park, Hajime Ishida, Koutaro Maki, Ryosuke Kimura
FGFR1 plays an important role in the development of the nervous system as well as the regulation of the skeletal development and bone homeostasis. Mutations in FGFR1 genes affect skull development, specifically suture and synchondrosis, resulting in craniosynostosis and facial abnormalities. We examined subjects with normal skull morphology for genetic polymorphisms that might be associated with normal craniofacial variations. Genomic DNA was obtained from 216 Japanese and 227 Korean subjects. Four FGFR1 SNPs, namely, rs881301, rs6996321, rs4647905, and rs13317, were genotyped...
2017: PloS One
https://www.readbyqxmd.com/read/28118195/cephalometric-analysis-of-modifications-of-the-mandible-due-to-reduction-mandibuloplasty-in-patients-with-prominent-mandibular-angle
#7
Guoping Wu, Minkai Xie, Chunbing Hu, Bin Zhou, Hao Dai, Wenwen Zhang
Cephalometry has been used to measure hard and soft facial tissues as well as to conduct the ostectomy to determine the characteristics of the prominent mandibular angles (PMA). The changes produced on the mandibles by reduction mandibuloplasty are not known. The objective of the present study was to identify by cephalometric analysis the anatomical changes of the mandibles that occur in patients with PMA after reduction mandibuloplasty. Forty-two patients with PMA were submitted to cephalometric analysis before, 1 week and 6 months after surgery to evaluate the changes of the mandibles produced by reduction mandibuloplasty...
January 23, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28097213/fully-automated-quantitative-cephalometry-using-convolutional-neural-networks
#8
Sercan Ö Arık, Bulat Ibragimov, Lei Xing
Quantitative cephalometry plays an essential role in clinical diagnosis, treatment, and surgery. Development of fully automated techniques for these procedures is important to enable consistently accurate computerized analyses. We study the application of deep convolutional neural networks (CNNs) for fully automated quantitative cephalometry for the first time. The proposed framework utilizes CNNs for detection of landmarks that describe the anatomy of the depicted patient and yield quantitative estimation of pathologies in the jaws and skull base regions...
January 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28062177/maxillomandibular-advancement-for-obstructive-sleep-apnea-syndrome-treatment-long-term-results
#9
Aurélie Vigneron, Renaud Tamisier, Emmanuelle Orset, Jean-Louis Pepin, Georges Bettega
PURPOSE: We evaluated the long term effectiveness of maxillomandibular advancement (MMA) for OSAS treatment patients. This retrospective study reviewed the patients treated by MMA for OSAS between 1995 and 2009. They were evaluated by complete polysomnography, cephalometry and quality of life questionnaire. The minimum follow up was 3 years. Success rate was defined by an IAH <10 with at least a 50% reduction. MATERIAL AND METHODS: 88 patients had MMA during this period...
December 7, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28004246/reproducibility-of-three-dimensional-posterior-cranial-base-angles-using-low-dose-computed-tomography
#10
R Olszewski, L Frison, N Schoenarts, R H Khonsari, G A Odri, F Zech, H Reychler
OBJECTIVES: One of the key aspects of three-dimensional (3D) craniofacial cephalometry is the measurement of posterior cranial base angle as this area is deeply involved in craniofacial development. The purpose of our retrospective study was to define the best reproducible 3D posterior cranial base angles among five 3D angles transposed from 2D cephalometry (Cousin, BL1 of Ross and Ravosa, Bjork, Delaire, CBA4 of Liberman) and seven 3D angles based on physical anthropology studies and on new concepts (R1 to R7)...
December 21, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27858070/-evaluation-of-the-maxillary-basal-bone-and-molar-change-of-skeletal-class-ii-malocclusion-treated-by-sagittal-guidance-twin-block
#11
Ying-Yu Yi, Ning Zhao, Gang Shen
PURPOSE: To investigate the effects of sagittal-guidance Twin-block appliance on maxillary basal bone and buccal segment distalization in developing Angle Class II division 1 malocclusion. METHODS: The measurement data of anterior-posterior direction and vertical dimension between pretherapy and post-treatment, including 34 developing Angle Class II division 1 patients with sagittal-guidance Twin-block and non-extraction treatment, were quantitatively analyzed by X-ray cephalometry and Pancherz...
August 2016: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/27723632/the-reliability-of-cephalometric-measurements-in-oral-and-maxillofacial-imaging-cone-beam-computed-tomography-versus-two-dimensional-digital-cephalograms
#12
Arvind Hariharan, N R Diwakar, K Jayanthi, H M Hema, S Deepukrishna, Snehal R Ghaste
CONTEXT: This study compared digital two-dimensional (2D) lateral cephalograms and cone-beam computed tomography (CBCT) total and half-skull images for the reliability of cephalometric measurements. AIMS: (1) To compare the accuracy of cephalometric measurements and reproducibility between the digital and CBCT cephalograms in the Indian population. (2) To compare interobserver variability in landmark identification through their cephalometric measurements by comparing different imaging modalities (CBCT total skull, CBCT half-skull, and conventional lateral cephalogram)...
July 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/27639780/fronto-facial-advancement-and-bipartition-in-crouzon-pfeiffer-and-apert-syndromes-impact-of-fronto-facial-surgery-upon-orbital-and-airway-parameters-in-fgfr2-syndromes
#13
Roman H Khonsari, Benjamin Way, Johan Nysjö, Guillaume A Odri, Raphaël Olszewski, Robert D Evans, David J Dunaway, Ingela Nyström, Jonathan A Britto
A major concern in FGFR2 craniofaciosynostosis is oculo-orbital disproportion, such that orbital malformation provides poor accommodation and support for the orbital contents and peri-orbita, leading to insufficient eyelid closure, corneal exposure and eventually to functional visual impairment. Fronto-facial monobloc osteotomy followed by distraction osteogenesis aims to correct midfacial growth deficiencies in Crouzon-Pfeiffer syndrome patients. Fronto-facial bipartition osteotomy followed by distraction is a procedure of choice in Apert syndrome patients...
October 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27609391/-analysis-of-three-dimensional-stability-of-the-hypoplastic-maxilla-after-orthognathic-surgery-in-cleft-lip-and-palate-patients
#14
Jun-Zi Yingwang, Shun-Yao Shen, Biao Li, Hao Sun, Xu-Dong Wang
PURPOSE: To establish a three dimensional spacial measurement method to analyze the short-term stability of maxilla after orthognathic surgery in cleft lip and palate patients. METHODS: Twenty-five patients with maxillary hypoplasia secondary to cleft lip and palate seeking for orthognathic surgery were included in this study between January 2008 and September 2012. The spiral CT scan for the skull were taken 6 weeks preoperatively (T0), 4 days postoperatively (T1),3 months postoperatively (T2), and 6 months postoperatively (T3) and collected...
June 2016: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/27608365/effect-of-dietary-calcium-deficiency-and-altered-diet-hardness-on-the-jawbone-growth-a-micro-ct-and-bone-histomorphometric-study-in-rats
#15
Yuko Fujita, Shota Goto, Maika Ichikawa, Ayako Hamaguchi, Kenshi Maki
OBJECTIVES: We examined the effects of a low-calcium diet and altered diet hardness on bone architecture and metabolism in the maxilla and mandible. MATERIALS AND METHODS: Male rats (n=48, 3 weeks old) were divided into six groups. In total, 24 rats were given a normal-calcium diet and the others were given a low-calcium diet. Each group was then divided into three subgroups, which were fed a 'hard̕ diet for 8 weeks, a 'soft̕ die for 8 weeks, or switched from the soft diet after 4 weeks to the hard diet for 4 weeks...
December 2016: Archives of Oral Biology
https://www.readbyqxmd.com/read/27555732/applicability-of-the-ricketts-posteroanterior-cephalometry-for-sex-determination-using-logistic-regression-analysis-in-hispano-american-peruvians
#16
Ivan Perez, Allison K Chavez, Dario Ponce
BACKGROUND: The Ricketts' posteroanterior (PA) cephalometry seems to be the most widely used and it has not been tested by multivariate statistics for sex determination. OBJECTIVE: The objective was to determine the applicability of Ricketts' PA cephalometry for sex determination using the logistic regression analysis. MATERIALS AND METHODS: The logistic models were estimated at distinct age cutoffs (all ages, 11 years, 13 years, and 15 years) in a database from 1,296 Hispano American Peruvians between 5 years and 44 years of age...
May 2016: Journal of Forensic Dental Sciences
https://www.readbyqxmd.com/read/27544963/-di-paolo-s-cephalometrical-analysis-of-lower-face-by-means-of-cone-beam-ct
#17
Adrienn Dobai, Tamás Vizkelety, Zsolt Markella, Adrienne Rosta, Ágnes Kucserá, József Barabás
OBJECT: 3D cephalometry is often the only way to set up accurate diagnosis and treatment plan in the field of reconstructive surgery. In these cases complement exposures are needed beyond common cephalograms with higher accuracy than conventional Cone-Beam CT. Consequently the aim of our study was to perform a complex 3D cephalometry. As the first step of this approach, was the 3D adaptation of DiPaolo's Quadrilateral technique, and to determine norms of references in lower face by means of CBCT...
June 2016: Fogorvosi Szemle
https://www.readbyqxmd.com/read/27450468/total-analysis-of-clinical-factors-for-surgical-success-of-adenotonsillectomy-in-pediatric-osas
#18
Ting-So Chang, Rayleigh Ping-Ying Chiang
The objective of this study is the total evaluation of most common clinical factors influencing the successful rate of adenotonsillectomy for pediatric obstructive sleep apnea syndrome (OSAS). Retrospectively, 63 pediatric patients ranged from 2 to 16 years old were included. Syndromics and patients who had received orthodontic treatment or orthognathic surgery were excluded. All patients received pre-operative and postoperative polysomnography and cephalometry. Each patient received adenotonsillectomy by single surgeon...
January 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27413397/craniocervical-posture-in-patients-with-obstructive-sleep-apnea
#19
Chaiane Facco Piccin, Daniela Pozzebon, Fabricio Scapini, Eliane Castilhos Rodrigues Corrêa
INTRODUCTION: Obstructive Sleep Apnea (OSA) is characterized by repeated episodes of upper airway obstruction during sleep. OBJECTIVE: The objective of this study is to verify the craniofacial characteristics and craniocervical posture of OSA and healthy subjects, determining possible relationships with the apnea/hypopnea index (AHI). METHODS: This case-control study evaluated 21 subjects with OSA, who comprised the OSA group (OSAG), and 21 healthy subjects, who constituted the control group (CG)...
July 2016: International Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/27377110/electromyographic-evaluation-of-a-patient-treated-with-extraoral-traction-a-case-report
#20
E Ortu, M Lacarbonara, R Cattaneo, G Marzo, R Gatto, A Monaco
BACKGROUND: This work seeks to provide information on the utility of surface electromyography (SEMG) as an aid for diagnosing orthodontic conditions. Classic orthodontic monitoring by radiography, plaster models, cephalometry, and photography can be improved by using SEMG before and during treatment, to prevent clinical worsening and relapses. CASE REPORT: This paper presents the SEMG results for a 10-year-old female patient, orthodontically treated by extraoral traction (EOT)...
June 2016: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
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