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Maxillomandibular

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https://www.readbyqxmd.com/read/29142868/protrusive-maxillomandibular-fixation-for-intracapsular-condylar-fracture-a-report-of-two-cases
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
https://www.readbyqxmd.com/read/28913310/treatment-of-mandibular-angle-fractures
#12
REVIEW
Jung-Ho Lee
The management of mandibular angle fractures is often challenging and results in the highest complication rate among fractures of the mandible. In addition, the optimal treatment modality for angle fractures remains controversial. Traditional treatment protocols for angle fractures have involved rigid fixation with intraoperative maxillomandibular fixation (MMF) to ensure absolute stability. However, more recently, non-compression miniplates have gained in popularity and the use of absolute intraoperative MMF as an adjunct to internal fixation has become controversial...
June 2017: Arch Craniofac Surg
https://www.readbyqxmd.com/read/28879332/anesthetic-management-for-simultaneous-drug-induced-sleep-endoscopy-and-maxillomandibular-advancement-in-a-patient-with-obstructive-sleep-apnea
#13
Tae Seong Kuk, Eunsun So, Myong-Hwan Karm, Jimin Kim, Seong In Chi, Hyun Jeong Kim, Kwang-Suk Seo, Sung Woon On, Jin-Young Choi
Drug-induced sleep endoscopy (DISE) is used to identify areas of upper airway obstruction, which occurs when patients with obstructive sleep apnea (OSA) snore. DISE enables effective diagnosis and appropriate treatment of the obstruction site. Among surgical treatment methods for OSA, maxillomandibular advancement surgery (MMA) is performed to move a jaw forward; the surgery has a high success rate for OSA treatment. In DISE, anesthetics such as propofol and midazolam must be administered to induce snoring while the patient is deeply sedated for an accurate diagnosis to be made...
March 2017: J Dent Anesth Pain Med
https://www.readbyqxmd.com/read/28867598/intracranial-and-hierarchical-perspective-on-dietary-plasticity-in-mammals
#14
Erin M Franks, Jeremiah E Scott, Kevin R McAbee, Joseph P Scollan, Meghan M Eastman, Matthew J Ravosa
The effect of dietary properties on craniofacial form has been the focus of numerous functional studies, with increasingly more work dedicated to the importance of phenotypic plasticity. As bone is a dynamic tissue, morphological variation related to differential loading is well established for many masticatory structures. However, the adaptive osteogenic response of several cranial sites across multiple levels of bony organization remains to be investigated. Here, rabbits were obtained at weaning and raised for 48 weeks until adulthood in order to address the naturalistic influence of altered loading on the long-term development of masticatory and non-masticatory elements...
March 16, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28865605/three-dimensional-versus-standard-miniplate-fixation-in-the-management-of-mandibular-fractures-a-meta-analysis-of-randomized-controlled-trials
#15
Kubila Silajiding, Patiguli Wusiman, Bilikezi Yusufu, Adili Moming
The aim of this meta-analysis is to evaluate the efficacy of the 3-dimensional miniplate system in comparison with the standard miniplate system for the treatment of mandibular fractures (MFs). A systematic review was conducted according to PRISMA guidelines, examining Medline-Ovid, Embase, and PubMed databases. The primary search objective was to identify all papers reporting the results of randomized control trials (RCTs) for the treatment of adults with mandibular fractures, with the aim of comparing the different techniques...
September 2017: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/28861393/stability-of-dental-alveolar-and-skeletal-changes-after-miniscrew-assisted-rapid-palatal-expansion
#16
Hyun-Mook Lim, Young-Chel Park, Kee-Joon Lee, Kyung-Ho Kim, Yoon Jeong Choi
OBJECTIVE: Miniscrew-assisted rapid palatal expansion (MARPE) is a means for expanding the basal bone without surgical intervention in young adults. Here, we assessed the differences in dental, alveolar, and skeletal measurements taken before (T0), immediately after (T1), and 1 year after (T2) MARPE. METHODS: Twenty-four patients (mean age, 21.6 years) who had undergone MARPE and cone-beam computed tomography at T0, T1, and T2 were included. Changes in the following parameters were compared using paired t-tests: intercusp, interapex, alveolar, nasal floor, and nasal cavity widths; inclination of the first molar (M1) and its alveolus; and thickness and height of the alveolar bone...
September 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28843406/do-patients-with-malocclusion-have-a-higher-prevalence-of-temporomandibular-disorders-than-controls-both-before-and-after-orthognathic-surgery-a-systematic-review-and-meta-analysis
#17
Essam Ahmed Al-Moraissi, Daniel Perez, Edward Ellis
PURPOSE: The aim of this study was to identify, through meta-analysis, whether patients who require orthognathic surgery have a higher prevalence of temporomandibular disorders (TMDs) than controls, both before treatment and after. MATERIAL AND METHODS: A systematic review and meta-analysis were conducted based on PRISMA guidelines, to address the study purposes. A search of major databases through PubMed, EMBASE, and Cochrane CENTRAL was performed to locate all pertinent articles published from inception to June 2016...
October 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28834052/incidence-of-obstructive-sleep-apnea-in-elderly-edentulous-patients-and-the-possible-correlation-of-serum-serotonin-and-apnea-hypopnea-index
#18
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
https://www.readbyqxmd.com/read/28815893/the-facial-morphology-in-down-syndrome-a-3d-comparison-of-patients-with-and-without-obstructive-sleep-apnea
#19
Yasas S N Jayaratne, Ibrahim Elsharkawi, Eric A Macklin, Lauren Voelz, Gil Weintraub, Dennis Rosen, Brian G Skotko
Obstructive sleep apnea (OSA) occurs at a high prevalence in patients with Down syndrome (DS). A polysomnogram, which is often cumbersome and challenging, remains the gold standard method of diagnosing OSA. OSA in patients with DS is often attributed to skeletal and soft-tissue structural alterations that are characteristic of the DS phenotype; as such, we hypothesized that assessing anthropometric facial measurements may be predictive of OSA in patients with DS. We used the 3dMDface sterophotography system to capture and create 3D facial images, and we subsequently identified facial landmarks using a single, experienced investigator and utilizing proprietary software to calculate inter-landmark distances and angles...
November 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28803737/cone-beam-computed-tomography-based-cephalometric-norms-for-brazilian-adults
#20
R M G Santos, J M De Martino, F Haiter Neto, L A Passeri
This study established cone beam computed tomography (CBCT)-based cephalometric norms for Brazilian adults, including the assessment of sexual dimorphism. An observer performed McNamara's cephalometric analysis twice on 60 CBCT datasets acquired from patients with a normal dental occlusion, divided equally into two groups by sex. Welch's t-test was applied to assess differences between the sexes in hard tissue cephalometric measurements, and Dahlberg's formula was used to calculate measurement error introduced by the observer...
August 10, 2017: International Journal of Oral and Maxillofacial Surgery
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