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Orthognathic surgery

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https://www.readbyqxmd.com/read/28538070/one-stage-treatment-for-adult-patients-with-crouzonoid-appearance-by-orthognathic-and-face-contouring-surgery
#1
Byung Jun Kim, Hahn Sol Bae, Yoonho Lee
Crouzon syndrome is a rare genetic disorder with autosomal-dominant inheritance that shows a triad of hallmark characteristics: craniosynostosis, exophthalmos, and midface retrusion. General treatment protocol for patients with Crouzon syndrome has already been established, but there is no standard treatment strategy for adult patients with Crouzonoid appearance. The authors present clinical patients of 1-stage orthognathic and face contouring surgery to achieve functional and aesthetic improvement.One-stage surgery was performed in adult patients with Crouzonoid appearance without a history of facial surgery...
May 19, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28538068/clinical-and-cephalometric-analysis-of-facial-soft-tissue
#2
Jeseok Oh, Jeong Joon Han, Sun-Youl Ryu, Hee-Kyun Oh, Min-Suk Kook, Seunggon Jung, Hong-Ju Park
OBJECTIVE: This study aimed to provide average of standard values in planning orthognathic surgery in Asians. MATERIALS AND METHODS: Thirty-three Asians with well-balanced facial profile, combined with class I occlusion and stabilized condylar head were evaluated using lateral cephalograms. RESULTS: Facial length (Nasion'-Menton') was 138.8 and 127.0 mm in male and female, respectively. Upper and lower lip length were 24.5 and 49.8 mm for male, and 22...
May 19, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28538022/surgical-orthodontics
#3
Alexis M Strohl, Lauren Vitkus
PURPOSE OF REVIEW: The article reviews some commonly used orthodontic treatments as well as new strategies to assist in the correction of malocclusion. Many techniques are used in conjunction with surgical intervention and are a necessary compliment to orthognathic surgery. Basic knowledge of these practices will aid in the surgeon's ability to adequately treat the patient. RECENT FINDINGS: Many orthodontists and surgeons are eliminating presurgical orthodontics to adopt a strategy of 'surgery first' orthodontics in orthognathic surgery...
May 22, 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
https://www.readbyqxmd.com/read/28528114/postoperative-outcomes-of-two-and-three-dimensional-planning-in-orthognathic-surgery-a-comparative-study
#4
Ting-Yu Wu, Hsiu-Hsia Lin, Lun-Jou Lo, Cheng-Ting Ho
OBJECTIVE: Compared with conventional two-dimensional (2D) planning, three-dimensional (3D) planning in orthognathic surgery yields more accurate anatomical information and enables the precise positioning of maxillary and mandibular segments, particularly for patients with facial asymmetry. Accordingly, surgical outcomes achieved using 3D planning should be superior. This study determined the differences between the 2D and 3D planning techniques by comparing their surgical outcomes. MATERIALS AND METHODS: In this retrospective study, patients who underwent surgery following the traditional 2D planning technique were classified into the 2D planning group...
April 23, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28526831/selection-of-a-horizontal-reference-plane-in-3d-evaluation-identifying-facial-asymmetry-and-occlusal-cant-in-orthognathic-surgery-planning
#5
Daniel Lonic, Ali Sundoro, Hsiu-Hsia Lin, Pei-Ju Lin, Lun-Jou Lo
Facial asymmetry and dental occlusal cant have been detected in two-dimensional cephalometry using different horizontal reference lines, but equivalent 3-dimensional (3D) reference planes have not been thoroughly investigated. In this study, 3D cone-beam computed tomography scans of 83 consecutive patients were evaluated using a standardized 3D frame and three horizontal reference planes, Supraorbitale (Sor), Frontozygomatic (Z), and Frankfurt horizontal (FH) for cant detection. Canting was defined as a vertical difference between left and right sides of 2 mm or more, and in at least two investigated planes...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28523082/three-dimensional-printing-custom-made-implants-for-craniomaxillofacial-reconstructive-surgery
#6
REVIEW
Mariana Matias, Horácio Zenha, Horácio Costa
Craniomaxillofacial reconstructive surgery is a challenging field. First it aims to restore primary functions and second to preserve craniofacial anatomical features like symmetry and harmony. Three-dimensional (3D) printed biomodels have been widely adopted in medical fields by providing tactile feedback and a superior appreciation of visuospatial relationship between anatomical structures. Craniomaxillofacial reconstructive surgery was one of the first areas to implement 3D printing technology in their practice...
June 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28515028/augmentation-of-the-infraorbital-rim-in-orthognathic-surgery
#7
T Fattahi, S Salman, B Steinberg
Mid-face augmentation via a Le Fort I osteotomy is a commonly performed operation. Advancement of the upper jaw and associated structures (nose, lower cheek areas) can certainly improve function as well as facial aesthetics and harmony. Often, in patients with severe mid-face deficiency, hypoplasia of the maxilla extends all the way up to the infraorbital rims. The receding infraorbital rim contributes to the negative vector of the globes. In patients with this level of mid-face hypoplasia, while advancing the maxilla at the Le Fort I level satisfies all of the requirements for orthognathic surgery, the deficient infraorbital rim remains unchanged and can actually accentuate the negative vector of the globes...
May 14, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28500875/upper-airway-changes-after-mandibular-setback-and-or-advancement-genioplasty-in-obese-patients
#8
Wen Du, Dongming He, Yiyao Wang, Hanghang Liu, Chuhang Liao, Wei Fei, En Luo
PURPOSE: Orthognathic surgeries, such as bilateral sagittal split ramus osteotomy (BSSO) and genioplasty, can influence the pharyngeal airway space (PAS) and this has been supported by previous studies. The purpose of this study was to assess changes of the PAS in patients with a high body mass index (BMI) likely to have narrow airways before and after setback BSSO with or without advancement genioplasty surgery by 3-dimensional computed tomography. MATERIALS AND METHODS: Thirty-five adults with a BMI of at least 24...
April 19, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28489659/relationship-between-the-quantity-of-nerve-exposure-during-bilateral-sagittal-split-osteotomy-surgery-and-sensitive-recovery
#9
Paolo Gennaro, Maria Elisa Giovannoni, Niccolò Pini, Ikenna Valentine Aboh, Guido Gabriele, Giorgio Iannetti, Flavia Cascino
AIM AND OBJECTIVES: The purpose of this study was to evaluate how different exposures of the V3 nerves during orthognathic surgery impact neurosensory disturbances. METHODS: The study included 127 patients who underwent either bilateral sagittal split osteotomy (BSSO) or BSSO with maxillary le Fort 1. They were divided into 6 groups, identified by the quantity of V3 nerve exposure. All patients were examined in a pre-op period and again after 1, 3, 6 months post-op...
May 9, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28468173/double-anterior-segmental-osteotomy-under-local-anesthesia-for-correcting-adult-protrusion-with-thin-alveolus-and-ankylosed-tooth
#10
Byung-Joon Choi, Baek-Soo Lee, Hee-Jung Lee, Ki-Ho Park, Seong-Hun Kim
BACKGROUNDS: This paper describes an additional benefit in double anterior segmental osteotomy to correct severe anterior protrusion in adult patients with extremely thin mandibular alveolus and ankylosed tooth. For the optimal anterior segmental retraction, an ankylosed posterior tooth needed surgical inclination reposition. During anterior segmental osteotomy surgery under local anesthesia, additional single tooth osteotomy was performed without challenge. METHODS: For anterior segment retraction, osteotomy cuts were made by the surgeon to define a block of bone embedding 6 mandibular anterior teeth...
May 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28468158/velopharyngeal-insufficiency-after-le-fort-i-osteotomy-in-a-patient-with-undiagnosed-occult-submucous-cleft-palate
#11
Rushil R Dang, Bonnie L Padwa, Cory M Resnick
The authors present a 16-year-old patient with no known history of cleft palate who developed velopharyngeal insufficiency after a Le Fort I osteotomy performed for the correction of maxillary hypoplasia and a Class III malocclusion. Postoperative evaluation revealed the presence of velopharyngeal insufficiency and subtle findings of an occult submucous cleft palate. She had a pharyngeal flap 6 months later with successful correction of the velopharyngeal insufficiency. This case illustrates the need to screen for submucous cleft palate prior to orthognathic surgery...
May 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28466191/operative-time-blood-loss-hemoglobin-drop-blood-transfusion-and-hospital-stay-in-orthognathic-surgery
#12
Ra'ed Ghaleb Salma, Fahad Mohammed Al-Shammari, Bishi Abdullah Al-Garni, Mohammed Abdullah Al-Qarzaee
PURPOSE: This study was conducted to evaluate the operative time, blood loss, hemoglobin drop, blood transfusion, and length of hospital stay in orthognathic surgery. METHODS: A 10-year retrospective analysis was performed on patients who underwent bilateral sagittal split osteotomy (with or without genioplasty), Le Fort I osteotomy (with or without genioplasty), or any combination of these procedures. A total of 271 patients were included. RESULTS: The age range was 17 to 49 years, with a mean age of 24...
June 2017: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28463076/youtube%C3%A2-as-an-information-resource-for-orthognathic-surgery
#13
Emmett Hegarty, Ciara Campbell, Ektor Grammatopoulos, Andrew T DiBiase, Martyn Sherriff, Martyn T Cobourne
OBJECTIVE: To investigate video content on YouTube™ related to orthognathic surgery. MATERIALS AND METHODS: YouTube™ was searched using the terms: orthognathic surgery; orthodontic surgery; jaw surgery; jaw corrective surgery. Inclusion criteria included English language; primary content orthognathic surgery and acceptable audio-visual quality. Videos were sorted into the top 50 for each search term by view-count and into an overall top 60 from the four searches...
May 2, 2017: Journal of Orthodontics
https://www.readbyqxmd.com/read/28462475/use-positional-screws-for-le-fort-i-osteotomy-fixation-technical-note
#14
Rafael Linard Avelar, Maykel Sullyvan Marinho de Souza, Eduardo Costa Studart Soares, Rodrygo Nunes Tavares
In recent years, several studies related to fixation systems have been published, but few suggest any variations of the Le Fort I osteotomy technique, and the use of plates and screws placed along the canine and zygomatic pillar are common. The 20-year-old patient with Crouzon syndrome presented with severe hypoplasia of the maxillary, mandibular prognathism, and class III facial pattern. The patient underwent orthognathic surgery and high Le Fort I osteotomy with the fixation of eight positional screws. The aim of this paper is to describe a different technique for the fixation in high maxillary osteotomies, which can be used in specific cases...
May 1, 2017: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28462192/two-dimensional-and-volumetric-airway-changes-after-bimaxillary-surgery-for-class-iii-malocclusion
#15
Toraj Vaezi, Seyed Hossein Hosseini Zarch, Majid Eshghpour, Hamed Kermani
OBJECTIVES: Any change in maxilla and mandible position can alter the upper airway, and any decrease in the upper airway can cause sleep disorders. Thus, it is necessary to assess airway changes after repositioning of the maxilla and mandible during orthognathic surgery. The purpose of this study was to evaluate linear and volumetric changes in the upper airway after bimaxillary surgery to correct class III malocclusion via cone-beam computed tomography (CBCT) and to identify correlations between linear and volumetric changes...
April 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/28462187/timing-of-orthognathic-surgery-paradigm-shift-by-surgery-first-approach
#16
EDITORIAL
Ju-Hong Jeon
No abstract text is available yet for this article.
April 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/28462182/evaluation-of-temporomandibular-disorders-before-and-after-orthognathic-surgery-therapeutic-considerations-on-a-sample-of-76-patients
#17
Carlo di Paolo, Giorgio Pompa, Paolo Arangio, Anna di Nunno, Stefano Di Carlo, Daniele Rosella, Piero Papi, Piero Cascone
OBJECTIVES: Temporomandibular disorders may be associated with dental and facial malformations. The aim of this study is to record the prevalence of TMDs in patients scheduled for orthognathic surgery, reporting the development of TMDs and symptoms during the entire period of the treatment, and demonstrating the benefits of a team effort on this population. MATERIALS AND METHODS: Assessment of temporomandibular status was performed using the RDC/TMD criteria at T0 (prior to orthodontic therapy), T1 (3 months after the surgery), and T2 post-therapeutic cycle (6 to 12 months postoperatively)...
March 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28459284/chin-throat-anatomy-normal-relations-and-changes-following-orthognathic-surgery-and-growth-modification
#18
Ramzi V Haddad, Joseph G Ghafari
OBJECTIVES: To determine if a new facial line (T), tangent to the throat, intersects the mandibular border in anterior (ANT) and posterior (POST) parts in proportions varying with facial configuration, and to evaluate the association between chin projection and throat inclination and the potential for the T-line to reflect this association. MATERIALS AND METHODS: Measurements on profile photographs and cephalograms of 135 adults (aged 18-50 years)-45 each of Class I, II, and III (CI, CII, CIII) malocclusions-included ANT and POST, chin-throat (CTA), and mento-cervical (MCA) angles...
May 1, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28457824/surgical-correction-of-mandibular-hypoplasia-in-hemifacial-microsomia-a-retrospective-study-in-39-patients
#19
H Bertin, J Mercier, A Cohen, J Giordanetto, N Cohen, S H Lee, J P Perrin, P Corre
PURPOSE: Repair of the mandibular deformity in hemifacial microsomia (HFM) remains controversial, and there is scant information in the literature regarding the late outcomes. The aim of this study was to evaluate architectural and aesthetic long-term outcomes for primary mandibular surgery in patients with HFM. MATERIALS AND METHODS: Thirty-nine patients with types II and type III HFM were included in this retrospective study. Depending on the nature of the mandibular deformity, patients were treated using a costochondral graft (CCG) or a vertical ramus osteotomy (VRO)...
March 30, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28457590/accuracy-of-maxillary-repositioning-by-computer-aided-orthognathic-surgery-in-patients-with-normal-temporomandibular-joints
#20
Xiaozhen Lin, Biao Li, Xudong Wang, Steve G F Shen
Our aim was to assess the accuracy of computer-aided orthognathic surgery for maxillary repositioning in 15 patients with mandibular hyperplasia and normal temporomandibular joints (TMJ). We aligned preoperative and postoperative virtual skulls at the cranium using surface superimposition then recorded and calibrated three 3-dimensional coordinates (maxillary dental landmarks U0, 6R, and 6L) on the skulls. Errors between these preoperative and postoperative landmarks were calculated and the largest error of every patient was chosen for assessment...
April 27, 2017: British Journal of Oral & Maxillofacial Surgery
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