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https://www.readbyqxmd.com/read/29769591/clinical-retrospective-case-control-study-on-the-mechanics-of-obstacle-in-mouth-opening-and-malocclusion-in-patients-with-maxillofacial-fractures
#1
Hai-Hua Zhou, Kun Lv, Rong-Tao Yang, Zhi Li, Xue-Wen Yang, Zu-Bing Li
This study aims to identify and distinguish various factors that may influence the clinical symptoms (limited mouth opening and malocclusion) in patients with maxillofacial fractures. From January 2000 to December 2009, 963 patients with maxillofacial fractures were enrolled in this statistical study to aid in evaluating the association between various risk factors and clinical symptoms. Patients with fractured posterior mandibles tended to experience serious limitation in mouth opening. Patients who sustained coronoid fractures have the highest risk of serious limitation in mouth opening (OR = 9...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29746842/does-the-deep-layer-of-the-deep-temporalis-fascia-really-exist
#2
Hui Li, Kaide Li, Wenhao Jia, Chaoying Han, Jinlong Chen, Lei Liu
PURPOSE: It has been widely accepted that a split of the deep temporal fascia occurs approximately 2 to 3 cm above the zygomatic arch and extends into the superficial and deep layers. The deep layer of the deep temporal fascia is between the superficial temporal fat pad and the temporal muscle. However, during procedures, the authors noted the absence of the deep layer of the deep temporal fascia between the superficial temporal fat pad and the temporal muscle. This prospective study was conducted to clarify the presence or absence of a deep layer of the deep temporal fascia...
April 14, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29745761/diagnostic-reliability-of-low-dose-multidetector-computed-tomography-and-cone-beam-computed-tomography-in-maxillofacial-trauma-an-experimental-blinded-and-randomized-study
#3
Romke Rozema, Michiel Hj Doff, Peter Ma van Ooijen, Douwe Postmus, Henriëtte E Westerlaan, Martijn F Boomsma, Baucke van Minnen
OBJECTIVE: To assess the diagnostic reliability of low dose Multidetector Computed Tomography (MDCT) and Cone Beam Computed Tomography (CBCT) for zygomaticomaxillary fracture diagnosis. METHODS: Unilateral zygomaticomaxillary fractures were inflicted on four out of six fresh frozen human cadaver head specimens. All specimens were scanned using four MDCT and two CBCT imaging protocols of which the radiation exposure was systematically reduced. A blinded diagnostic routine was simulated at which 16 radiologists and 8 oral and maxillofacial (OMF) surgeons performed randomized image assessments...
May 10, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29742580/delayed-reduction-of-zygomatic-arch-fracture-effectiveness-of-the-rowe-zygoma-elevator
#4
Jinwoo Kim, Woosuk Hwang
The zygomaticomaxillary complex fractures are common fractures among the all facial fractures, and the zygomatic arch fracture accounts for approximately 10% of all facial fractures. Various routes (Gillies app, Direct cutaneous app, Bicoronal, intraoral) and devices (Foley's ballon catheter, Rowe zygoma elevator, Langenbach, deschamps needle holder, Bone hook) for a surgical intervention of the zygomatic arch have been introduced. However, no study exists that has described an effective method of surgery for zygomatic arch fractures that have been left untreated for a long period, or for unstable reduction that have not been reduced >1 month after surgery...
May 8, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29706553/keeping-the-fat-on-the-right-spot-prevents-contour-deformity-in-temporalis-muscle-transposition
#5
Martinus M van Veen, Steven F S Korteweg, Pieter U Dijkstra, Paul M N Werker
The temporalis muscle transposition is a reliable, one-stage reanimation technique for longstanding facial paralysis. In the variation described by Rubin, the muscle is released from the temporal bone and folded over the zygomatic arch towards the modiolus. This results in unsightly temporal hollowing and zygomatic bulging. We present a modification of this technique, which preserves the temporal fat pad in its anatomical location as well as conceals temporal hollowing and prevents zygomatic bulging. The data of 23 patients treated with this modification were analysed...
April 13, 2018: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/29690583/anatomical-and-radiographic-study-on-the-skull-and-mandible-of-the-common-opossum-didelphis-marsupialis-linnaeus-1758-in-the-caribbean
#6
Reda Mohamed
Common opossums ( Didelphis marsupialis ) are found throughout the Caribbean island of Trinidad and Tobago. The present work was conducted on 10 skulls and mandibles of the common opossum to describe the osteology and foramina of these skulls and mandibles grossly and radiographically. The information that is garnered can be used to detect, diagnose, and treat head affections, as well as for comparative studies with the skulls and mandibles of other similar species. The skulls and mandibles were prepared and cleaned using standard method...
April 23, 2018: Veterinary Sciences
https://www.readbyqxmd.com/read/29684307/osteochondroma-of-the-zygomatic-arch-a-case-report-and-review-of-the-literature
#7
R Patel, G Obeid
An osteochondroma, when reported in the maxillofacial region, is a benign neoplasm that involves the skull base, maxillary sinus, zygomatic arch, or mandible. Most commonly, the osteochondroma occurs in the coronoid process and the condyle. One rare subtype of osteochondroma reported in the literature, termed Jacob disease, arises from the coronoid process and interferes with the zygomatic arch. This report describes a unique case of an isolated osteochondroma arising from the zygomatic arch and interfering with the coronoid process, which was treated through surgical excision by an intraoral approach...
March 31, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29677030/a-cadaveric-study-of-ultrasound-guided-maxillary-nerve-block-via-the-pterygopalatine-fossa-a-novel-technique-using-the-lateral-pterygoid-plate-approach
#8
Wirinaree Kampitak, Tanvaa Tansatit, Yasuyuki Shibata
BACKGROUND AND OBJECTIVES: This study aimed to describe and assess the accuracy and feasibility of a novel technique for ultrasound-guided maxillary nerve block using the lateral pterygoid plate (LPP) approach via the pterygopalatine fossa (PPF) in a soft cadaveric model. METHODS: Ten soft cadavers were studied. The curved array ultrasound transducer probe was applied over 1 side of the face of the cadavers in the open-mouth posture. It was placed transversely below the zygomatic arch for identifying the border of the maxillary tuberosity and the LPP...
April 19, 2018: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29659436/a-novel-technique-of-ultrasound-guided-selective-mandibular-nerve-block-with-a-lateral-pterygoid-plate-approach-a-cadaveric-study
#9
Wirinaree Kampitak, Tanvaa Tansatit, Yasuyuki Shibata
BACKGROUND AND OBJECTIVES: We aimed to describe a novel technique of ultrasound-guided selective mandibular nerve block with a lateral pterygoid plate (LPP) approach and to assess its feasibility and accuracy in a soft cadaver model. METHODS: Ten soft cadavers were studied. A curved array ultrasound transducer was applied over 1 side of the face of the cadaver, in an open-mouth position. The transducer was placed transversely below the zygomatic arch and tilted in the caudal-to-cranial direction to identify the boundary of the LPP...
April 14, 2018: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29609435/retained-large-glass-fragments-for-over-40-years-in-the-maxillofacial-region
#10
Woong Gyu Na, Hyoseob Lim, Sung Hoon Koh, Sung Won Jung
Foreign body (FB) impaction in the maxillofacial area could be caused by knives, glass fragments, and vegetative materials. We present the rare case of a 62-year-old man with a large glass FB in the left cheek retained for over 40 years. He had traffic accident over 40 years ago and glass fragments impacted on his left cheek. Glass fragments were retained around the zygomatic arch with dimpled scar and unclear serous discharge, but other facial motor or sensory dysfunction was not observed. We confirmed three glass fragments with radiologic examination including plain radiograph and computed tomographic image...
March 2018: Archives of Craniofacial Surgery
https://www.readbyqxmd.com/read/29602352/precision-and-reliability-of-dolphin-3-dimensional-voxel-based-superimposition
#11
Mohamed Bazina, Lucia Cevidanes, Antonio Ruellas, Manish Valiathan, Faisal Quereshy, Ali Syed, Rongning Wu, J Martin Palomo
INTRODUCTION: Superimposition of 2 cone-beam computed tomography images is possible by using landmarks, surfaces, or density information (voxel-based). Voxel-based superimposition is automated and uses the most image content, providing accurate results. Until recently, this superimposition was extremely laborious, but a user-friendly voxel-based superimposition has recently been introduced. Our aim was to evaluate the precision and reliability of Dolphin 3-dimensional voxel-based superimposition (Dolphin Imaging, Chatsworth, Calif)...
April 2018: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29570528/zygomaticofacial-zygomaticoorbital-and-zygomaticotemporal-foramina
#12
Danielle Carvalho Oliveira Coutinho, Paulo Antônio Martins-Júnior, Isabela Campos, Antônio Luís Neto Custódio, Micena Roberta Miranda Alves E Silva
This study aimed to assess the anatomical and morphometric characteristics of the main zygomaticofacial (ZFF), zygomaticoorbital (ZOF), and zygomaticotemporal (ZTF) foramina in Brazilian dry skulls. 61, 69, and 42 skulls for ZFF, ZOF, and ZTF were evaluated by a single calibrated examiner for format, transverse and vertical diameters, and distances from the foramina to anatomical landmarks. Paired t test, Wilcoxon test, Pearson and Spearman correlations were used. Circular outline was the predominant format for ZFF and ZTF, while oval format was the most frequent for ZOF...
March 22, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29557398/immediately-loaded-zygomatic-implants-vs-conventional-dental-implants-in-augmented-atrophic-maxillae-4-months-post-loading-results-from-a-multicentre-randomised-controlled-trial
#13
Marco Esposito, Rubén Davó, Carlos Marti-Pages, Ada Ferrer-Fuertes, Carlo Barausse, Roberto Pistilli, Daniela Rita Ippolito, Pietro Felice
PURPOSE: To compare the clinical outcome of immediately loaded cross-arch maxillary prostheses supported by zygomatic implants vs conventional implants placed in augmented bone. MATERIALS AND METHODS: A total of 71 edentulous patients with severely atrophic maxillas, who did not have sufficient bone volume to place dental implants or when it was possible to place only two implants in the front area (minimal diameter 3.5 mm and length of 8 mm) and less than 4.0 mm of bone height subantrally, were randomised according to a parallel group design...
2018: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/29480233/3d-reconstruction-images-of-cone-beam-computed-tomography-applied-to-maxillofacial-fractures-a-case-study-and-mini-review
#14
Liyun Bai, Linlin Li, Kexin Su, Anthony Bleyer, Yuanyuan Zhang, Ping Ji
Maxillofacial injuries can be complex and are clinically important due to their functional and cosmetic significance. Maltreated and missed fractures might cause deformity of the face; thus, accurate evaluation of the fracture provided by X-ray images is critical. In this study, we explore the application of cone-beam computed tomography (CBCT) for diagnosis of severe maxillofacial traumas. A patient with a complex fracture that affects the maxilla, mandible, wall of the maxillary sinus, zygoma, zygomatic arch and nasal bone was diagnosed using 3D reconstruction of CBCT images...
2018: Journal of X-ray Science and Technology
https://www.readbyqxmd.com/read/29438657/biocompatibility-and-efficiency-of-biodegradable-magnesium-based-plates-and-screws-in-the-facial-fracture-model-of-beagles
#15
Byung Jun Kim, Yinglan Piao, Maierdanjiang Wufuer, Woo-Chan Son, Tae Hyun Choi
PURPOSE: A biodegradable magnesium alloy system has been developed as a substitute for conventional plates and screws made of titanium or absorbable polymer. However, previous studies were limited to small animal experiments using screws or wires. In the present study, we preliminarily evaluated the biocompatibility and effectiveness of human standard-size biodegradable magnesium-based plates and screws in facial fractures of beagles. MATERIALS AND METHODS: Fracture lines were created bilaterally in the zygomatic arches of 6 beagles...
May 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29438203/does-periosteal-graft-combined-with-platelet-rich-plasma-enhance-the-healing-of-bone-defect
#16
Arzu Türkseven, Derya Özçelik, Mert Çaliş, Hakan Hamdi Celik, Fahri Yilmaz, Ömer Önbaş, Alper Vatansever, Gaye Toplu
INTRODUCTION: This study investigated the effect of periosteal graft + platelet-rich plasma (PRP) combination on facial bone defect healing. METHODS: Five-millimeter critical sized defects in zygomatic arches of 12 adult New Zealand rabbits were created. Rabbits were randomly divided into 3 groups: First group (control group): bone defects of left zygomatic arches of 6 rabbits were wrapped with a silicone tube. Second group (periosteal graft group): bone defects of left zygomatic arches of 6 rabbits were wrapped with periosteal graft...
February 12, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29429255/-a-study-of-the-relations-of-foramen-rotundum-structure-direction-and-the-approach-of-percutaneous-puncturing-of-radiofrequency-thermocoagulation-for-treating-v2-of-primary-trigeminal-neuralgia
#17
Z W Chen, J B Ma, K Y Xie, B Huang, M Yao, Y Fei, L Zhang
Objective: To investigate the relations of foramen rotundum structure direction and surrounding structure systematically in order to choose the best approach of percutaneous puncturing of radiofrequency thermocoagulation for treating V2 of primary trigeminal neuralgia. Methods: A total of 122 patients with V2 of primary trigeminal neuralgia for radiofrequency thermocoagulation were enrolled from August 2012 to May 2017 at the First Hospital of Jiaxing. CT scan images were observed retrospectively, to find the inside and outside of the foramen rotundum...
February 6, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29423138/developmental-constraint-through-negative-pleiotropy-in-the-zygomatic-arch
#18
Christopher J Percival, Rebecca Green, Charles C Roseman, Daniel M Gatti, Judith L Morgan, Stephen A Murray, Leah Rae Donahue, Jessica M Mayeux, K Michael Pollard, Kunjie Hua, Daniel Pomp, Ralph Marcucio, Benedikt Hallgrímsson
Background: Previous analysis suggested that the relative contribution of individual bones to regional skull lengths differ between inbred mouse strains. If the negative correlation of adjacent bone lengths is associated with genetic variation in a heterogeneous population, it would be an example of negative pleiotropy, which occurs when a genetic factor leads to opposite effects in two phenotypes. Confirming negative pleiotropy and determining its basis may reveal important information about the maintenance of overall skull integration and developmental constraint on skull morphology...
2018: EvoDevo
https://www.readbyqxmd.com/read/29407505/role-of-cone-beam-computed-tomography-with-a-large-field-of-view-in-goldenhar-syndrome
#19
Cosimo Nardi, Luisa De Falco, Valeria Selvi, Chiara Lorini, Linda Calistri, Stefano Colagrande
INTRODUCTION: Goldenhar syndrome is a rare disease with hemifacial microsomia and craniofacial disorders originating from the first and second branchial arches, such as ocular, auricular, and vertebral anomalies. The complexity and variety of the ways in which the disease presents itself usually need several examinations. In this study, we aimed to evaluate both craniofacial and vertebral skeletal anomalies and asymmetries between the nonaffected and affected sides in patients with Goldenhar syndrome by using cone-beam computed tomography...
February 2018: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29381608/treatment-of-sagittal-fracture-of-the-zygomatic-arch-root-assisted-by-surgical-navigation-technology
#20
Jin-Hong Dai, Dong-Dong Xu, Chang-Yuan Yang, Zu-Bing Li, Zhi Li
Sagittal fracture at the temporal root of the zygomatic arch often occurs as a part of zygomaticomaxillary fractures. The authors described the application of computer-assisted navigation in the lag screw insertion for the fixation of sagittal fracture at the temporal root of zygomatic arch. Using the presurgical planning of the computer-assisted navigation system, the trajectory of lag screw insertion was designed, and the insertion depth was calculated. In the presurgical planning, the trajectory of screw insertion was placed with an anterior inclination of 10° to 15° (mean: 12...
January 29, 2018: Journal of Craniofacial Surgery
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