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Maxillomandibular

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https://www.readbyqxmd.com/read/29296116/a-new-method-for-surgical-treatment-of-subcondylar-fractures-a-case-report
#1
Gholamreza Shirani, Mahnaz Arshad, Kamran Rasouli, Touraj Vaezi
Subcondylar fractures are common in the maxillofacial region following direct trauma to the mandibular ramus. The literature is replete with articles written on the treatment of subcondylar fractures, encompassing a plethora of various surgical approaches; however, the best treatment procedure has remained controversial. Such fractures are either treated by open reduction with internal fixation or closed reduction with maxillomandibular fixation. In this article, we describe a new surgical method for treatment of subcondylar fractures...
September 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29291187/dentofacial-transverse-development-in-koreans-according-to-skeletal-maturation-a-cross-sectional-study
#2
Soonshin Hwang, Yoonjeong Noh, Yoon Jeong Choi, Chooryung Chung, Hye Sun Lee, Kyung-Ho Kim
Objective: The aim of this study was to establish the normative data of dentofacial transverse dimensions according to the skeletal maturation stage in Korean adolescents with good occlusion, assess gender differences and determine correlations between transverse variables. Methods: A total of 577 Korean subjects between ages 7 to 19 years and exhibiting skeletal Class I occlusion were categorized by skeletal maturation index (SMI) of Fishman using hand-wrist radiographs...
January 2018: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/29288649/posterior-airway-changes-following-orthognathic-surgery-in-obstructive-sleep-apnea
#3
REVIEW
Sophia Gottsauner-Wolf, Johannes Laimer, Emanuel Bruckmoser
PURPOSE: The purpose of this systematic review was to describe and compare the different approaches of radiologic posterior airway space (PAS) assessment in obstructive sleep apnea (OSA) and analyze the correlations of PAS changes with polysomnographically evaluated parameters after orthognathic surgery. MATERIALS AND METHODS: For this systematic review, a PubMed query was designed to search for original studies radiographically evaluating the PAS in patients before and after orthognathic surgery for treatment of their OSA...
December 6, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29261517/treatment-approach-to-severe-microgenia-cases-combined-use-of-osseous-and-implant-genioplasty
#4
Kemal Findikcioglu, Serhat Sibar, Ayse Gulsen
INTRODUCTION: As well as the chin is an important esthetic unit of the facial structure, it is also the region having a key role in the appearance of the face. Correction of cosmetic and functional deformities that may occur in this region because of serious hypoplasia (microgenia) is performed by chin augmentation. Chin augmentation is most frequently performed via implant or osseous genioplasty in the literature. Both 2 techniques have their own advantages and disadvantages. In the literature, various studies comparing these 2 techniques and their long-term results are present, but in some severe microgenia cases, these techniques can be insufficient only for augmentation...
December 19, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29246423/sequencing-of-bimaxillary-surgery-in-the-correction-of-vertical-maxillary-excess-retrospective-study
#5
F S Salmen, T F M de Oliveira, M A C Gabrielli, V A Pereira Filho, M F Real Gabrielli
The aim of this study was to evaluate the precision of bimaxillary surgery performed to correct vertical maxillary excess, when the procedure is sequenced with mandibular surgery first or maxillary surgery first. Thirty-two patients, divided into two groups, were included in this retrospective study. Group 1 comprised patients who received bimaxillary surgery following the classical sequence with repositioning of the maxilla first. Patients in group 2 received bimaxillary surgery, but the mandible was operated on first...
December 12, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29231055/effect-of-anatomical-region-on-the-formation-of-metal-artifacts-produced-by-dental-implants-in-cone-beam-computed-tomographic-images
#6
Alessiana Helena Machado, Karolina Aparecida Castilho Fardim, Camila Furtado de Souza, Bruno Salles Sotto-Maior, Neuza Maria Souza Picorelli Assis, Karina Lopes Devito
OBJECTIVES: To quantitatively compare metal artifacts produced by implants in different maxillomandibular regions on cone beam computed tomography (CBCT) images. METHODS: A total of 200 implants selected from CBCT examinations were divided into four groups: Group 1 (n = 50) - implants located in the anterior maxilla; Group 2 (n = 50) - implants located in the posterior maxilla; Group 3 (n = 50) - implants located in the anterior mandible; and Group 4 (n = 50) - implants located in the posterior mandible...
December 12, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29210502/three-dimensional-static-articulation-accuracy-of-virtual-models-part-ii-effect-of-model-scanner-cad-systems-and-articulation-method
#7
Sophia Hui Xin Yee, Roxanna Jean Esguerra, Amelia Anya Qin'An Chew, Keng Mun Wong, Keson Beng Choon Tan
PURPOSE: Accurate maxillomandibular relationship transfer is important for CAD/CAM prostheses. This study compared the 3D-accuracy of virtual model static articulation in three laboratory scanner-CAD systems (Ceramill Map400 [AG], inEos X5 [SIR], Scanner S600 Arti [ZKN]) using two virtual articulation methods: mounted models (MO), interocclusal record (IR). MATERIALS AND METHODS: The master model simulated a single crown opposing a 3-unit fixed partial denture. Reference values were obtained by measuring interarch and interocclusal reference features with a coordinate measuring machine (CMM)...
December 6, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29199373/dentoskeletal-and-soft-tissue-changes-in-class-ii-subdivision-treatment-with-asymmetric-extraction-protocols
#8
Guilherme Janson, Eduardo Beaton Lenza, Rodolfo Francisco, Aron Aliaga-Del Castillo, Daniela Garib, Marcos Augusto Lenza
BACKGROUND: This study cephalometrically compared the dentoskeletal and soft tissue changes consequent to one and three-premolar extraction protocols of class II subdivision malocclusion treatment. METHODS: A sample of 126 lateral cephalometric radiographs from 63 patients was selected and divided into two groups. Group 1 consisted of 31 type 1 class II subdivision malocclusion patients treated with asymmetric extractions of two maxillary premolars and one mandibular premolar on the class I side, with an initial mean age of 13...
December 4, 2017: Progress in Orthodontics
https://www.readbyqxmd.com/read/29183699/three-dimensional-changes-to-the-upper-airway-after-maxillomandibular-advancement-with-counterclockwise-rotation-a-systematic-review-and-meta-analysis
#9
R S Louro, J A Calasans-Maia, C T Mattos, D Masterson, M D Calasans-Maia, L C Maia
The aim of this study was to evaluate the effect of counterclockwise (CCW) rotation and maxillomandibular advancement (MMA) on the upper airway space using three-dimensional images. An electronic search was performed in the PubMed, Cochrane Library, Scopus, Virtual Health Library, Web of Science, and OpenGrey databases (end date July 2016); a hand-search of primary study reference lists was also conducted. The inclusion criteria encompassed computed tomography evaluations of the upper airway spaces of adult patients undergoing orthognathic surgery with CCW rotation and MMA...
November 25, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29142868/protrusive-maxillomandibular-fixation-for-intracapsular-condylar-fracture-a-report-of-two-cases
#10
Yeong Kon Jeong, Won-Jong Park, Il Kyung Park, Gi Tae Kim, Eun Joo Choi
Clinical limitations following closed reduction of an intracapsular condylar fracture include a decrease in maximum mouth opening, reduced range of mandibular movements such as protrusion/lateral excursion, and reduced occlusal stability. Anteromedial and inferior displacement of the medial condyle fragment by traction of the lateral pterygoid muscle can induce bone overgrowth due to distraction osteogenesis between the medial and lateral condylar fragments, causing structural changes in the condyle. In addition, when conventional maxillomandibular fixation (MMF) is performed, persistent interdental contact sustains masticatory muscle hyperactivity, leading to a decreased vertical dimension and premature contact of the posterior teeth...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29123991/the-use-of-synthes-matrixwave-bone-anchored-arch-bars-for-closed-treatment-of-multiple-concurrent-mandibular-fractures
#11
Elizabeth Kiwanuka, Rajiv Iyengar, Charles Christopher Jehle, Raman Mehrzad, Daniel Kwan
Background: Maxillomandibular fixation (MMF) is an important tool in the treatment of facial fractures and bone-anchored arch bar systems have emerged as treatment options. This study illustrates our experience with the Synthes MatrixWAVE MMF system and the novel application in closed treatment of patients with multiple concurrent mandibular fractures. Methods: We enrolled eight patients with concurrent mandibular fractures and treated them with the MatrixWAVE MMF system...
September 2017: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/29109838/treatment-outcomes-for-isolated-maxillary-complex-fractures-with-maxillomandibular-screws
#12
Rahul Gorka, Amish Jayantilal Gohil, Ashish Kumar Gupta, Santosh Koshy
Intermaxillary fixation (IMF) is a basic and fundamental principle in the management of patients with fractures of the maxillomandibular complex. There are several shortcomings related to the conventionally recommended tooth-mounted devices that are used to achieve IMF. To circumvent these, the use of bone-borne screws has been advocated. We present a series of maxillary fractures treated with IMF screws. Over a 12-month period, 15 cases of maxillary fracture were managed with open reduction and bone plate fixation...
December 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/29046964/differences-in-maxillomandibular-morphology-among-patients-with-mucopolysaccharidoses-i-ii-iii-iv-and-vi-a-retrospective-mri-study
#13
Till Koehne, Anja Köhn, Reinhard E Friedrich, Uwe Kordes, Thorsten Schinke, Nicole Muschol, Bärbel Kahl-Nieke
OBJECTIVE: The aims of this study were to analyze the maxillomandibular morphology of patients with mucopolysaccharidosis (MPS) type I, II, III, IVa and VI and to evaluate the craniofacial effect of hematopoietic stem cell transplantation (HCST) in MPS I. MATERIALS AND METHODS: One hundred head magnetic resonance images were retrospectively analyzed from 41 MPS and 27 control individuals. The width, height and length of the maxilla and mandible were plotted against age and the means of controls, MPS I, MPS II and MPS III were statistically compared...
October 18, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29042168/autonomous-bone-reposition-around-anatomical-landmark-for-robot-assisted-orthognathic-surgery
#14
Sang-Yoon Woo, Sang-Jeong Lee, Ji-Yong Yoo, Jung-Joon Han, Soon-Jung Hwang, Kyung-Hoe Huh, Sam-Sun Lee, Min-Suk Heo, Soon-Chul Choi, Won-Jin Yi
The purpose of this study was to develop a new method for enabling a robot to assist a surgeon in repositioning a bone segment to accurately transfer a preoperative virtual plan into the intraoperative phase in orthognathic surgery. We developed a robot system consisting of an arm with six degrees of freedom, a robot motion-controller, and a PC. An end-effector at the end of the robot arm transferred the movements of the robot arm to the patient's jawbone. The registration between the robot and CT image spaces was performed completely preoperatively, and the intraoperative registration could be finished using only position changes of the tracking tools at the robot end-effector and the patient's splint...
September 19, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29016191/treatment-changes-of-hypo-and-hyperdivergent-class-ii-herbst-patients
#15
Kim Rogers, Phillip M Campbell, Larry Tadlock, Emet Schneiderman, Peter H Buschang
OBJECTIVES: To determine the relative effects of Herbst appliance therapy in hypo- and hyperdivergent patients. MATERIALS AND METHODS: The treated group included 45 growing Class II, division 1, patients treated with stainless steel crown Herbst appliances, followed by fixed edgewise appliances. The untreated control group consisted of 45 Class II, division 1, subjects, matched to the treated sample based on Angle classification, age, sex, and pretreatment mandibular plane angle (MPA)...
October 10, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28987230/controversies-in-obstructive-sleep-apnea-surgery
#16
REVIEW
Carolyn C Dicus Brookes, Scott B Boyd
Obstructive sleep apnea (OSA) is a common chronic disease characterized by repetitive pharyngeal collapse during sleep. OSA is associated with cardiovascular disease and increased mortality, among other issues. Continuous positive airway pressure (CPAP) is considered first line therapy for OSA, but is not always tolerated. Both non-surgical and surgical alternative management strategies are available for the CPAP intolerant patient. This article explores controversies surrounding airway evaluation, definition of successful treatment, and surgical management of the CPAP intolerant patient with moderate to severe OSA...
November 2017: Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/28967392/cad-cam-high-density-polymer-implant-supported-fixed-diagnostic-prostheses
#17
Burak Yilmaz
Computer-aided design and computer-aided manufacturing (CAD-CAM) complete-arch implant-supported fixed prostheses have become popular in recent years and offer several advantages over traditional fabrication techniques. However, they also present challenges, and careful treatment planning is required, particularly for zirconia implant-supported fixed prostheses layered with feldspathic porcelain. This clinical report describes the use of a CAD-CAM high-density polymer implant-supported diagnostic prosthesis to verify the accuracy of the implant impression and evaluate the maxillomandibular relationship, esthetics, and phonetics of the planned CAD-CAM definitive implant-supported fixed prosthesis before CAM processing...
September 26, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28941509/current-management-of-subcondylar-fractures-of-the-mandible-including-endoscopic-repair
#18
REVIEW
Alexis M Strohl, Robert M Kellman
Treatment of subcondylar fractures has been the subject of debate for many years. Options for treatment include physical therapy, elastic maxillomandibular fixation, and open repair. Proper imaging and clinical evaluation are imperative when deciding on the best management option. In the past, most subcondylar fractures were treated with a closed approach. Recent data support open repair, when feasible. Studies show increased interincisal opening, lateral excursion, and protrusion with less mandibular shortening, jaw deviation, and pain...
November 2017: Facial Plastic Surgery Clinics of North America
https://www.readbyqxmd.com/read/28941508/updates-in-management-of-craniomaxillofacial-gunshot-wounds-and-reconstruction-of-the-mandible
#19
REVIEW
Baber Khatib, Savannah Gelesko, Melissa Amundson, Allen Cheng, Ashish Patel, Tuan Bui, Eric J Dierks, R Bryan Bell
This article includes updates in the management of mandibular trauma and reconstruction as they relate to maxillomandibular fixation screws, custom hardware, virtual surgical planning, and protocols for use of computer-aided surgery and navigation when managing composite defects from gunshot injuries to the face.
November 2017: Facial Plastic Surgery Clinics of North America
https://www.readbyqxmd.com/read/28923761/surgical-treatment-of-osa-on-cardiovascular-outcomes-a-systematic-review
#20
Tyler R Halle, Melissa S Oh, Nancy A Collop, Arshed A Quyyumi, Donald L Bliwise, Raj C Dedhia
BACKGROUND: OSA is an increasingly prevalent clinical problem with significant effects on quality of life and cardiovascular risk. Surgical therapy represents an important treatment for those unable to use positive airway pressure. This systematic review examines the available cardiovascular risk reduction data for the surgical treatment of OSA. METHODS: A comprehensive literature search was performed. Articles were included if they met the following criteria: (1) the sample population consisted of adults (age ≥ 18 years); (2) OSA was diagnosed according to a sleep study; (3) surgical intervention was performed for OSA; and (4) one or more physical or biochemical cardiovascular and/or cerebrovascular variables was measured preoperatively and at ≥ 14 days postoperatively...
September 18, 2017: Chest
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