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Maxillomandibular

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https://www.readbyqxmd.com/read/28071714/three-dimensional-surgical-simulation-improves-the-planning-for-correction-of-facial-prognathism-and-asymmetry-a-qualitative-and-quantitative-study
#1
Cheng-Ting Ho, Hsiu-Hsia Lin, Eric J W Liou, Lun-Jou Lo
Traditional planning method for orthognathic surgery has limitations of cephalometric analysis, especially for patients with asymmetry. The aim of this study was to assess surgical plan modification after 3-demensional (3D) simulation. The procedures were to perform traditional surgical planning, construction of 3D model for the initial surgical plan (P1), 3D model of altered surgical plan after simulation (P2), comparison between P1 and P2 models, surgical execution, and postoperative validation using superimposition and root-mean-square difference (RMSD) between postoperative 3D image and P2 simulation model...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28067977/the-effect-of-teeth-in-mandibular-fracture-lines
#2
Aylin Sipahi Calis, Candan Efeoglu, Huseyin Koca
AIM: The decision to retain or extract teeth in the line of mandibular fractures has been a subject of debate in the scientific literature and there is a need for further evidence to clear this issue. Thus, the aim of this study was to investigate the effects on healing of teeth in the line of mandibular fractures in order to contribute to the field. MATERIAL AND METHODS: The case notes of 100 patients with teeth in the line of 106 mandibular fractures were reviewed...
January 9, 2017: Dental Traumatology: Official Publication of International Association for Dental Traumatology
https://www.readbyqxmd.com/read/28063275/a-survey-of-sleep-medicine-physician-perceptions-on-the-surgical-treatment-of-obstructive-sleep-apnea
#3
Jonathan J Swope, Marcus A Couey, James W Wilson, Jonathon S Jundt
PURPOSE: Surgical treatment for obstructive sleep apnea (OSA) varies by specialty. Our survey sought to answer 3 principal questions: 1) To which surgical specialists are sleep physicians referring patients for upper airway surgery? 2) Which surgical treatment do sleep specialists find to be most effective in treating OSA? 3) Do sleep medicine physicians believe that maxillomandibular advancement (MMA) is worthwhile to patients who are surgical candidates? MATERIALS AND METHODS: We formulated a cross-sectional survey...
December 18, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28062177/maxillomandibular-advancement-for-obstructive-sleep-apnea-syndrome-treatment-long-term-results
#4
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/28005735/subtypes-of-maxillomandibular-advancement-surgery-for-patients-with-obstructive-sleep-apnea
#5
Won-June Lee, Dong-Hyun Hwang, Stanley Yung-Chuan Liu, Su-Jung Kim
Maxillomandibular advancement (MMA) surgery, which is the most effective treatment modality for patients with moderate-to-severe obstructive sleep apnea with apparent skeletal discrepancies, has been modified in conjunction with segmental osteotomies, counterclockwise rotation of maxillomandibular complex, and other adjunctive procedures. However, any single type of MMA could not treat or cure all the patients with obstructive sleep apnea showing different dentofacial and pharyngeal patterns. We aimed to suggest critical decision factors for the selective application of MMA subtypes, categorized as straight MMA with genioplasty, rotational MMA, segmental MMA, and segmental-rotational MMA, in the surgical treatment objective process: anteroposterior position of maxilla, upper lip projection, overjet, lower incisor inclination as sagittal factors, and upper incisor exposure and occlusal plane angle as vertical factors...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27997447/combined-counterclockwise-maxillomandibular-advancement-and-uvulopalatopharyngoplasty-surgeries-for-severe-obstructive-sleep-apnea
#6
Wenwen Yu, Meng Wang, Jiande He, Liyan Lu, Ming Cai, Hongxia Sun, Xiaofeng Lu
As the most effective surgical technique maxillomandibular advancement (MMA) has been used to treat severe obstructive sleep apnea (OSA) in adults, particularly for those who are intolerant of continuous positive airway pressure. Yet for large-scale advancement, it is faced with esthetic problems with marked skeletal protrusion especially for people with convex facial profile. In this study, the authors performed counterclockwise MMA combined with quantified uvulopalatopharyngoplasty (UPPP) surgeries on Chinese adult patients with severe OSA, in order to initially explore the efficacy of these procedures on Chinese populations and provide evidence for esthetic advantages...
December 16, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27978554/technical-and-clinical-considerations-for-facial-feminization-surgery-with-rhinoplasty-and-related-procedures
#7
Raúl J Bellinga, Luis Capitán, Daniel Simon, Thiago Tenório
Importance: Together with the forehead reconstruction, feminization of the nose is one of the most common procedures in facial feminization surgery. Rhinoplasty surgical techniques, which provide correct support and stability in the midterm to long term, are essential for obtaining a predictable result. Objective: To report on the technical and clinical considerations of rhinoplasty and related procedures to feminize the nose, harmonize the nose in relation to the other modified structures (mainly the forehead and maxillomandibular complex), and achieve an aesthetic result beyond gender differences...
December 15, 2016: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/27977486/assessment-of-the-postoperative-stability-of-mandibular-orthognathic-surgery-for-correction-of-class-iii-skeletal-malocclusion
#8
Giuliano Henrique Mião Luchi, Ricardo Augusto Conci, Flavio Henrique Silveira Tomazi, Rosana da Silva Berticelli, Michel Martins Guarenti, Guilherme Genehr Fritscher, Cláiton Heitz
To assess the stability of mandible position after orthognathic surgery for correction of class III skeletal malocclusion. Twenty adult males, aged 18 to 40 years, with Angle class III skeletal malocclusion underwent preoperative orthodontic treatment for elimination of dental compensations followed by combined maxillomandibular surgery with rigid internal fixation. Lateral cephalograms from each patient, obtained in the natural head position before surgery, immediately after surgery, and at 6-month follow-up, were retrieved from the files of the Pontifical Catholic University of Rio Grande do Sul outpatient Oral and Maxillofacial Surgery clinic and compared...
December 12, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27974977/total-cad-cam-supported-method-for-manufacturing-removable-complete-dentures
#9
Arthur Furtado de Mendonça, Mario Furtado de Mendonça, George Shelby White, Georges Sara, Darren Littlefair
The incorporation of computer-aided design/computer-aided manufacturing (CAD/CAM) technology into complete denture fabrication brings about several advantages to the fabrication process, providing better predictability of the desired outcomes and high accuracy of denture fit, mainly because the milling of prepolymerized acrylic resin eliminates the shrinkage of the acrylic base. Also, there is a decrease in the porosity when compared to a conventionally processed denture, and consequently there is a decrease in the retention of Candida albicans on the denture base...
2016: Case Reports in Dentistry
https://www.readbyqxmd.com/read/27957370/refractory-obstructive-sleep-apnea-in-a-patient-with-diffuse-idiopathic-skeletal-hyperostosis
#10
Ara Darakjian, Ani B Darakjian, Edward T Chang, Macario Camacho
Diffuse Idiopathic Skeletal Hyperostosis (DISH) can cause ossification of ligaments and may affect the spine. We report a case of obstructive sleep apnea in a patient with significant upper airway narrowing secondary to cervical DISH. This patient had an initial apnea-hypopnea index (AHI) of 145 events/hour and was treated with uvulopalatopharyngoplasty, genial tubercle advancement, hyoid suspension, septoplasty, inferior turbinoplasties, and radiofrequency ablations to the tongue base which reduced his AHI to 40 events/hour...
2016: Case Reports in Otolaryngology
https://www.readbyqxmd.com/read/27957317/mandibular-subcondylar-fractures-a-review-on-treatment-strategies
#11
REVIEW
Mohammad Bayat, Milad Parvin, Ali Aghaei Meybodi
Condylar injuries are often subjected to discussion and controversy in maxillofacial surgery as they constitute many of the facial fractures. The condylar area has a great clinical value due to its important components. Vital components in this area are susceptible to functional disability due to either the fracture itself or the subsequent surgical intervention. Each of the strategies for the management of these fractures has its advantages and disadvantages. As there are controversies around management of condylar fractures, different treatment modalities are suggested in literature, so this paper reviews different treatment strategies of the following types of fractures in adults: 1-Closed reduction with maxillomandibular fixation, 2-Open reduction with internal fixation, 3-Endoscopic-assisted reduction with internal fixation...
October 2016: Electronic Physician
https://www.readbyqxmd.com/read/27955799/closed-treatment-of-unilateral-mandibular-condyle-fractures-in-adults-a-systematic-review
#12
REVIEW
A V J Rozeboom, L Dubois, R R M Bos, R Spijker, J de Lange
Of all mandibular fractures, 25-35% are condylar. Many studies have focused on whether to treat such fractures via open or closed modalities. A uniform protocol for closed treatment is lacking, but such a protocol could ensure good clinical practice. The aims of this systematic review were to provide an overview of the published studies exclusively pertaining to closed treatment and to summarize the existing modalities for closed treatment and their clinical outcomes. Sixteen studies were selected for detailed analysis...
December 7, 2016: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27913095/soft-hard-tissues-and-pharyngeal-airway-volume-changes-following-maxillomandibular-transverse-osteodistraction-computed-tomography-and-three-dimensional-laser-scanner-evaluation
#13
Francesca Antonella Bianchi, Giovanni Gerbino, Marina Corsico, Eleonora Schellino, Niccolò Barla, Laura Verzè, Guglielmo Ramieri
INTRODUCTION: Maxillomandibular transverse osteodistraction (MMTOD) is an alternative approach to the traditional treatment for transverse maxillary and mandibular deficiencies and crowding. The aim was to report soft and hard-tissues changes and airway volume variation. METHODS: In this study, skeletally mature, non-syndromic patients with transverse maxillary and mandibular hypoplasia, who underwent a MMTOD between 2010 and 2012, were included. Surgical changes were analysed using clinical evaluation, three-dimensional facial surface data and computed tomography analysis before (T0) and after the completion of post-op orthodontic treatment (T1)...
January 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27889535/does-temporomandibular-joint-pathology-with-or-without-surgical-management-affect-the-stability-of-counterclockwise-rotation-of-the-maxillomandibular-complex-in-orthognathic-surgery-a-systematic-review-and-meta-analysis
#14
Essam Ahmed Al-Moraissi, Larry M Wolford
PURPOSE: This study was designed to determine the stability of counterclockwise rotation (CCWR) of the maxillomandibular complex (MMC) in orthognathic surgery with or without surgical correction of coexisting temporomandibular joint (TMJ) pathology. MATERIALS AND METHODS: The authors implemented a systematic review and meta-analysis. A search of major databases through PubMed, EMBASE, and Cochrane CENTRAL was performed. Inclusion criteria were studies that analyzed CCWR of the MMC in regard to skeletal stability after orthognathic surgery in patients with or without pre-existing TMJ pathology that was or was not surgically corrected concomitantly...
November 4, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27870345/betwixt-and-between-intracranial-perspective-on-zygomatic-arch-plasticity-and-function-in-mammals
#15
Erin M Franks, Nathan E Holton, Jeremiah E Scott, Kevin R McAbee, Jason T Rink, Kazune C Pax, Adam C Pasquinelly, Joseph P Scollan, Meghan M Eastman, Matthew J Ravosa
The zygomatic arch is morphologically complex, providing a key interface between the viscerocranium and neurocranium. It also serves as an attachment site for masticatory muscles, thereby linking it to the feeding apparatus. Though morphological variation related to differential loading is well known for many craniomandibular elements, the adaptive osteogenic response of the zygomatic arch remains to be investigated. Here, experimental data are presented that address the naturalistic influence of masticatory loading on the postweaning development of the zygoma and other cranial elements...
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27865790/maxillomandibular-advancement-surgery-for-patients-who-are-refractory-to-continuous-positive-airway-pressure-are-there-predictors-of-success
#16
Igor Makovey, Anita Valanju Shelgikar, Jeffrey J Stanley, Adina Robinson, Sharon Aronovich
PURPOSE: This pilot study was conducted to determine the effectiveness of maxillomandibular advancement (MMA) in the treatment of patients with moderate to severe obstructive sleep apnea (OSA). The predictive value of clinical, radiographic, and treatment-related variables also was investigated in relation to the success or failure of MMA as treatment for OSA. MATERIALS AND METHODS: A retrospective study design was used to assess the outcomes of MMA in patients with moderate to severe OSA (apnea hypopnea index [AHI] >15 events per hour) at the University of Michigan (Ann Arbor, MI)...
October 26, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27820122/tumor-induced-osteomalacia-in-a-3-year-old-with-unresectable-central-giant-cell-lesions
#17
Stephanie S Crossen, Eduardo Zambrano, Beverley Newman, Jonathan A Bernstein, Anna H Messner, Laura K Bachrach, Clare J Twist
Tumor-induced osteomalacia (TIO) is a rare cause of hypophosphatemia involving overproduction of fibroblast growth factor 23. TIO has been described largely in adults with small mesenchymal tumors. We report a case of TIO in a child who presented with knee pain and radiographic findings concerning for rickets, and was found to have maxillomandibular giant cell lesions. The patient was treated with oral phosphorus and calcitriol, surgical debulking, and intralesional corticosteroids, which resulted in tumor regression and normalization of serum fibroblast growth factor 23 and phosphorus...
January 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/27796401/geometric-morphometrics-of-different-malocclusions-in-lateral-skull-radiographs
#18
Josef Freudenthaler, Aleš Čelar, Christopher Ritt, Philipp Mitteröcker
BACKGROUND: To evaluate the role of craniofacial shape in malocclusion by application of geometric morphometrics to a set of two-dimensional landmarks and semilandmarks obtained from lateral skull radiographs. METHODS: Cephalometric radiograph tracings of 88 untreated Caucasians (age range 7-39 years) were assigned to four groups according to their occlusion: neutrocclusion, distocclusion, mesiocclusion, and anterior open bite. The geometric morphometric shape analysis incorporated 66 landmarks and semilandmarks, which underwent generalized Procrustes analysis, between-groups principal component analysis, thin-plate spline deformation grid visualization, permutation tests, and receiver operating characteristic curves...
January 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27774440/frontal-augmentation-as-an-adjunct-to-orthognathic-or-facial-contouring-surgery
#19
Young-Wook Park
BACKGROUND: The dimensions and shape of the forehead determine the esthetics of the upper third of the face. Korean young people consider a broad and smooth, rounded forehead more attractive. As a result, frontal augmentation becomes more popular in patients with dentofacial deformities. Various surgical procedures and materials have been used in frontal augmentation surgery, with associated advantages and disadvantages. Silicone is a good candidate for frontal augmentation. The author presents two cases of esthetic frontal augmentation with a prefabricated silicone implant in female patients with dentofacial deformities...
December 2016: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27756109/separate-development-of-the-maxilla-and-mandible-is-controlled-by-regional-signaling-of-the-maxillomandibular-junction-during-avian-development
#20
Hye-Jin Tak, Tae-Jin Park, Zhenngu Piao, Sang-Hwy Lee
BACKGROUND: Syngnathia is a congenital craniofacial disorder characterized by bony or soft tissue fusion of upper and lower jaws. Previous studies suggested some causative signals, such as Foxc1 or Bmp4, cause the disruption of maxillomandibular identity, but their location and the interactive signals involved remain unexplored. We wanted to examine the embryonic origin of syngnathia based on the assumption that it may be located at the separation between the maxillary and mandibular processes...
January 2017: Developmental Dynamics: An Official Publication of the American Association of Anatomists
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