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https://www.readbyqxmd.com/read/27894664/tomographic-osteometry-of-the-zygomatic-bone-applied-to-traumatology-of-facial-bones-preliminary-retrospective-study-of-zygomatic-summit-in-28-patients
#1
Barbara Lerhe, Sarah Alshehri, Denis Ferachon, Sébastien Dejean, Anne Sophie Salabert, Raphael Lopez
BACKGROUND: The available referential measures defining the zygomatic bone morphology are adequate enough for full determination of the zygoma positioning, especially for trauma surgery, but osteometric analysis of the zygoma positioning based on tomographic examinations could be useful in peroperative and postoperative imaging. In this study, we propose referential measures, taking into account the morphology and the symmetry of the zygoma. In addition, the reliability and reproducibility are considered...
October 28, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27894548/effects-of-zygoma-gear-appliance-for-unilateral-maxillary-molar-distalization-a-prospective-clinical-study
#2
Dogan Kilkis, Mevlut Celikoglu, Metin Nur, Mehmet Bayram, Celal Candirli
INTRODUCTION: The aim of the study was to evaluate the dentoskeletal effects of the zygoma-gear appliance used for unilateral maxillary molar distalization in patients with Class II subdivision malocclusion. METHODS: This prospective clinical study consisted of 21 patients (9 boys, 12 girls; mean age, 15.68 ± 2.18 years) with unilateral Class II malocclusion treated using the unilateral zygoma-gear appliance supported by a zygomatic miniplate inserted on the Class II malocclusion side...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27893551/mid-face-degloving-an-alternate-approach-to-extended-osteotomies-of-the-midface
#3
Anantanarayanan Parameswaran, Naveen Kumar Jayakumar, Manikandhan Ramanathan, Hermann F Sailer
Extended osteotomies for mid-face advancement require generous exposure of the anterior maxilla, nasal bones, infraorbital rims, orbital floor, zygoma, and the anterior third of the zygomatic arches. This cannot be obtained with an exclusive transoral approach. Hence, the surgeon is usually compelled to utilize supplemental cutaneous incisions that are a compromise on the purpose behind a cosmetic surgery. In order to alleviate the need for such compromise, the authors advocate the mid face degloving approach for extended osteotomies at Lefort II and Lefort III levels...
November 23, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27870348/the-anatomical-record-celebrates-its-continuing-exploration-of-the-vertebrate-skull-with-our-first-two-part-special-issue-understanding-the-zygoma
#4
Jeffrey T Laitman, Kurt H Albertine
No abstract text is available yet for this article.
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27870347/internal-bone-architecture-in-the-zygoma-of-human-and-pan
#5
Leslie Pryor McIntosh, David S Strait, Justin A Ledogar, Amanda L Smith, Callum F Ross, Qian Wang, Lynne A Opperman, Paul C Dechow
The internal and external anatomy of the primate zygoma is central to orofacial function, health, and disease. The importance of variation in its gross morphology across extinct and extant primate forms has been established using finite element analysis, but its internal structure has yet to be explored. In this study, µCT is used to characterize trabecular bone morphometry in two separate regions of the zygoma of humans and Pan. Trabecular anisotropy and orientation are compared with strain orientations observed in trabecular regions of finite element models of four Pan crania...
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27870346/divided-zygomatic-bone-in-primates-with-implications-of-skull-morphology-and-biomechanics
#6
Qian Wang, Paul C Dechow
Typically the zygoma is a single bone in the facial skeleton whose shape uniquely copes with loads associated with mastication. Rarely but naturally, the zygoma is divided into two or more parts by supernumerary sutures. These extra intrazygomatic sutures are located at an area of critical morphological and biomechanical importance, yet their impacts have not been studied. In this study, the morphological and possible biomechanical consequences of the divided zygoma (DZ) were investigated in primates including rhesus macaques (Macaca mulatta), orangutans (Pongo abelii and P...
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27870345/betwixt-and-between-intracranial-perspective-on-zygomatic-arch-plasticity-and-function-in-mammals
#7
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/27870342/the-mobility-of-the-human-face-more-than-just-the-musculature
#8
Anne M Burrows, Carolyn R Rogers-Vizena, Ly Li, Bryan Mendelson
The human face has the greatest mobility and facial display repertoire among all primates. However, the variables that account for this are not clear. Humans and other anthropoids have remarkably similar mimetic musculature. This suggests that differences among the mimetic muscles alone may not account for the increased mobility and facial display repertoire seen in humans. Furthermore, anthropoids themselves outpace prosimians in these categories: humans > other anthropoids > prosimians. This study was undertaken to clarify the morphological underpinnings of the increased mobility and display repertoire of the human face by investigating the SMAS (the superficial musculo-aponeurotic system), a connective tissue layer enclosing the mimetic musculature located between the skin and deep fascia/periosteum...
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27870341/development-structure-and-function-of-the-zygomatic-bones-what-is-new-and-why-do-we-care
#9
Paul C Dechow, Qian Wang
This issue of The Anatomical Record is the first of a two-volume set on the zygoma (also called the cheek bone, the zygomatic bone, the malar, or the jugal, the latter term being used in vertebrates other than mammals). The zygoma is an important component of the craniofacial skeleton, in which the zygoma is a connection between the midfacial and the cranial skeletons; has a functional role as the origin of one of the masticatory muscles, the masseter muscle, and several facial muscles; has been considered as an essential buttress of the facial skeleton for resisting masticatory forces; and has importance for determining phylogenetic relationships...
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27870340/developmental-and-evolutionary-significance-of-the-zygomatic-bone
#10
Yann Heuzé, Kazuhiko Kawasaki, Tobias Schwarz, Jeffrey J Schoenebeck, Joan T Richtsmeier
The zygomatic bone is derived evolutionarily from the orbital series. In most modern mammals the zygomatic bone forms a large part of the face and usually serves as a bridge that connects the facial skeleton to the neurocranium. Our aim is to provide information on the contribution of the zygomatic bone to variation in midfacial protrusion using three samples; humans, domesticated dogs, and monkeys. In each case, variation in midface protrusion is a heritable trait produced by one of three classes of transmission: localized dysmorphology associated with single gene dysfunction, selective breeding, or long-term evolution from a common ancestor...
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27870338/understanding-the-tie-that-binds-deciphering-the-world-of-the-zygoma
#11
Jeffrey T Laitman
No abstract text is available yet for this article.
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27868452/closed-reduction-of-zygomatic-tripod-fractures-using-a-towel-clip
#12
Anı Cinpolat, Ozlenen Ozkan, Gamze Bektas, Omer Ozkan
BACKGROUND: The zygomatic bone constitutes the prominence of the cheek. Fractures of the zygomatic bone are the second most treatment of zygomatic bone fractures and can be examined under two headings, open and closed reductions. This paper describes a new technique in the closed reduction of tripod fractures using a towel clip. METHODS: Seventeen consecutive patients (three females, 14 males) with a mean age of 35.5 years (range = 18-66 years) with zygomatic tripod fracture were treated using the towel clip technique between December 2011 and February 2014...
November 21, 2016: Journal of Plastic Surgery and Hand Surgery
https://www.readbyqxmd.com/read/27861671/real-time-surgical-navigation-system-for-the-placement-of-zygomatic-implants-with-severe-bone-deficiency
#13
Kuofeng Hung, Wei Huang, Feng Wang, Yiqun Wu
This case report describes the clinical application of a real-time surgical navigation system to guide zygomatic implants on their placement. With the assistance of this novel navigation system, constant visualization of the drilling trajectory and exact control of the drilling direction can be achieved, which could minimize the risk of penetration into critical anatomical structures. Moreover, implants might be accurately placed in accordance to the preoperative planned position. In this patient, who had previously undergone a hemimaxillectomy, three zygomatic implants were placed on the unilateral zygoma, and two conventional implants were placed on the unresected maxilla...
November 2016: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/27848082/quantitative-analysis-of-the-trajectory-of-simulated-basilar-apex-aneurysms-through-the-internal-carotid-artery-to-assess-the-need-for-an-orbitozygomatic-approach
#14
Yasushi Motoyama, Yasuo Hironaka, Fumihiko Nishimura, Pritam Gurung, Ryota Sasaki, Yasuhiro Takeshima, Ryosuke Matsuda, Kentaro Tamura, Ichiro Nakagawa, Young-Su Park, Hiroyuki Nakase
BACKGROUND: The aim of this study was to identify the correlation between the location of the internal carotid artery (ICA) and the need for an orbitozygomatic approach (OZA) when approaching a basilar apex (BX) aneurysm. MATERIALS AND METHODS: By imaging the virtual trajectory to access the basilar artery (BA) through the ICA, the correlations among the height of the BX, the height and lateral breadth of the bifurcation of the ICA, and the need for removal of the orbital rim or zygomatic arch were investigated using three-dimensional computed tomography angiography (3DCTA) data of approximately 80 random samples not limited to BX aneurysms...
November 15, 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27833286/diagnostic-tools-in-maxillofacial-fractures-is-there-really-a-need-of-three-dimensional-computed-tomography
#15
Sheerin Shah, Sanjeev K Uppal, Rajinder K Mittal, Ramneesh Garg, Kavita Saggar, Rishi Dhawan
INTRODUCTION: Because of its functional and cosmetic importance, facial injuries, especially bony fractures are clinically very significant. Missed and maltreated fractures might result in malocclusion and disfigurement of the face, thus making accurate diagnosis of the fracture very essential. In earlier times, conventional radiography along with clinical examination played a major role in diagnosis of maxillofacial fractures. However, it was noted that the overlapping nature of bones and the inability to visualise soft tissue swelling and fracture displacement, especially in face, makes radiography less reliable and useful...
May 2016: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/27830878/rostro-dorsal-and-rostro-lateral-skull-morphologic-variability-in-three-age-groups-of-the-egyptian-mongoose-herpestes-ichneumon-linnaeus-1758-implications-of-certain-orbital-parameters-angular-geometric-approach
#16
Michael Oluwale Samuel, Nathaniel Wanmi, Levi Usende
This study evaluated thirty skulls of the grey mongoose divided into three age groups (six pups, ten juveniles and fourteen adults) for skull shape variability determination. Specific geometric shapes were drawn from defined points. Angular geometric measurements of shapes derived from rostro-dorsal and rostro-lateral parts of the skull includes; orbital angles (with and without the mandible), comprising of viscero-cranium, skull and orbital index was calculated to evaluate the correlations if any, with angles measured...
November 10, 2016: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/27759845/post-operative-hemimaxillectomy-rehabilitation-using-prostheses-supported-by-zygoma-implants-and-remaining-natural-teeth
#17
Xing Zhou Qu, Ming Yi Wang, Hui Shan Ong, Chen Ping Zhang
OBJECTIVES: This study aimed to evaluate the stability of prostheses supported by zygoma implants and remaining teeth for subjects who had undergone hemi-maxillectomy. METHODS: Ten patients were included in the study. Oral rehabilitation was performed using a temporary prosthesis that was supported by remaining teeth for the first three months. Then, a zygoma implant was placed to provide support for a final prosthesis in addition to the remaining teeth. Each prosthesis was tailor-made according to biomechanical three-dimensional finite element analysis results...
October 1, 2016: Clinics
https://www.readbyqxmd.com/read/27747699/rehabilitation-of-a-complex-midfacial-defect-by-means-of-a-zygoma-implant-supported-prosthesis-and-nasal-epithesis-a-novel-technique
#18
Lorenzo Trevisiol, Pasquale Procacci, Antonio D'Agostino, Francesca Ferrari, Daniele De Santis, Pier Francesco Nocini
PURPOSE: Several authors have described zygoma implants as a reliable surgical option to rehabilitate severe maxillary defects in case of extreme atrophy or oncological resections. The aim of this study is to report a new technical approach to the rehabilitation of a complex oronasal defect by means of a zygoma-implant-supported full-arch dental prosthesis combined with a nasal epithesis. PATIENTS AND METHODS: The patient presented with a subtotal bilateral maxillectomy and total rhinectomy defect because of a squamous cell carcinoma of the nose...
December 2016: Int J Implant Dent
https://www.readbyqxmd.com/read/27689047/the-measurement-of-the-sensory-recovery-period-in-zygoma-and-blow-out-fractures-with-neurometer-current-perception-threshold
#19
Daemyung Oh, Taebin Yun, Junhyung Kim, Jaehoon Choi, Woonhyeok Jeong, Hojun Chu, Soyoung Lee
BACKGROUND: Facial hypoesthesia is one of the most troublesome complaints in the management of facial bone fractures. However, there is a lack of literature on facial sensory recovery after facial trauma. The purpose of this study was to evaluate the facial sensory recovery period for facial bone fractures using Neurometer. METHODS: Sixty-three patients who underwent open reduction of zygomatic and blowout fractures between December 2013 and July 2015 were included in the study...
September 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27677685/combined-use-of-facial-osteoplasty-and-orthognathic-surgery-for-treatment-of-dentofacial-deformities
#20
Yunfeng Li, Zhiai Hu, Bin Ye, Yao Liu, Xiaochun Ren, Songsong Zhu
PURPOSE: Orthognathic surgery is an efficient procedure for cosmetic and functional aims. However, when functional improvement is achieved by mandibular or maxillary operations, additional esthetic corrections may be imperative for some patients. This study aims to introduce our primary practice of simultaneous facial bone contouring and orthognathic surgery for esthetic reasons. PATIENTS AND METHODS: Ten patients with dentofacial deformities as well as a prominent angle, asymmetric deformities, or a high zygoma and zygomatic arch were recruited from West China Hospital of Stomatology, Sichuan University (Chengdu, China), between January 1, 2014, and July 31, 2015...
December 2016: Journal of Oral and Maxillofacial Surgery
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