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https://www.readbyqxmd.com/read/27893551/mid-face-degloving-an-alternate-approach-to-extended-osteotomies-of-the-midface
#1
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/27890546/radiological-evaluation-of-sphenozygomatic-suture-fixation-for-restoration-of-orbital-volume-a-retrospective-study
#2
Rohit Sharma, Chiyyarath Gopalan Muralidharan, Indranil Deb Roy, Narendra Kumar Jain, Seema Patrikar
PURPOSE: Lateral displacement of fracture zygomaticomaxillary complex (ZMC) can cause significant increase in orbital volume leading to enophthalmos. The aim of this study was to radiologically evaluate the efficacy of sphenozygomatic (SZ) suture fixation for restoration of orbital volume after elevation of the temporalis in cases of fracture ZMC where the fixation of zygomatic arch (ZA) was deemed necessary through latero-posterior approach. MATERIALS & METHODS: 43 operated cases of fracture ZMC using 4-point fixation were divided into two groups...
October 20, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27885569/delayed-retrieval-of-a-displaced-maxillary-third-molar-from-infratemporal-space-via-trans-sinusoidal-approach-a-case-report-and-the-review-of-the-literature
#3
REVIEW
Metin Sencimen, Aydin Gülses, Sencer Secer, Tamer Zerener, Savaş Özarslantürk
AIM: The aim of this case report is to present the trans-sinusoidal pathway used to remove a displaced maxillary third molar from the infratemporal fossa and review the English literature regarding the techniques used. CASE REPORT: A 21-year-old male patient was referred with the findings of an oroantral fistula on the left maxillary vestibular first molar region and slight restriction of mouth opening. The patient underwent a maxillary sinus surgery in order to remove a sinus retention cyst via Caldwell-Luc access in a dental clinic 4 years ago...
November 24, 2016: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27870350/the-periosteum-of-the-zygomatic-arch-vascularization-and-growth
#4
Susan W Herring, Pannee Ochareon
In addition to conveying the forces of attaching muscles and ligaments to the zygomatic and temporal bones, the arch periosteum is responsible for lateral apposition and medial resorption during the growth period. In this contribution, we describe the vasculature of the zygomatic arch in young pigs (Sus scrofa dom.) in order to understand the relationship of osseous and periosteal vessels to each other, to surrounding tissues, and to patterns of modeling. Subjects 2-6 weeks of age were perfused with vascular fill; some also received the vital bone label calcein...
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
#5
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
#6
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/27870344/elastic-properties-of-chimpanzee-craniofacial-cortical-bone
#7
Poorva Gharpure, Elias D Kontogiorgos, Lynne A Opperman, Callum F Ross, David S Strait, Amanda Smith, Leslie C Pryor, Qian Wang, Paul C Dechow
Relatively few assessments of cranial biomechanics formally take into account variation in the material properties of cranial cortical bone. Our aim was to characterize the elastic properties of chimpanzee craniofacial cortical bone and compare these to the elastic properties of dentate human craniofacial cortical bone. From seven cranial regions, 27 cylindrical samples were harvested from each of five chimpanzee crania. Assuming orthotropy, axes of maximum stiffness in the plane of the cortical plate were derived using modified equations of Hooke's law in a Mathcad program...
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27870343/the-biomechanics-of-zygomatic-arch-shape
#8
Amanda L Smith, Ian R Grosse
Mammalian zygomatic arch shape is remarkably variable, ranging from nearly cylindrical to blade-like in cross section. Based on geometry, the arch can be hypothesized to be a sub-structural beam whose ability to resist deformation is related to cross sectional shape. We expect zygomatic arches with different cross sectional shapes to vary in the degree to which they resist local bending and torsion due to the contraction of the masseter muscle. A stiffer arch may lead to an increase in the relative proportion of applied muscle load being transmitted through the arch to other cranial regions, resulting in elevated cranial stress (and thus, strain)...
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27870339/zygomatic-arch-cortical-area-and-diet-in-haplorhines
#9
Hallie Edmonds
The influence that various types of ingested foods have on the form (size and shape) of specific features of the masticatory system is an area in which many questions remain unanswered. The bony zygomatic arch, the focus of this study, is directly linked to the masticatory system because it serves as the anchor for the masseter muscle, a primary muscle of chewing and source of masticatory force. However, the influence of diet and the forces associated with different diet types on the arch's internal bone architecture is not well understood...
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
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
#10
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/27820555/sarcopenia-as-a-predictor-of-mortality-in-elderly-blunt-trauma-patients-comparing-the-masseter-to-the-psoas-using-computed-tomography
#11
James D Wallace, Richard Y Calvo, Paul R Lewis, Jason B Brill, Steven R Shackford, Michael J Sise, C Beth Sise, Vishal Bansal
BACKGROUND: Sarcopenia, or age-related loss of muscle mass, is measureable by computed tomography (CT). In elderly trauma patients, increased mortality is associated with decreased psoas muscle cross-sectional area (P-Area) on abdominal CT. Fall is the leading cause of injury in the elderly and head CT is more often obtained. Masseter muscle cross-sectional area (M-Area) is readily measured on head CT. Hypothesizing that M-Area is a satisfactory surrogate for P-Area, we compared the two as markers of sarcopenia and increased mortality in elderly trauma patients...
November 4, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27810208/retrograde-maxillary-nerve-perineural-injection-a-tomographic-and-anatomical-evaluation-of-the-infraorbital-canal-and-evaluation-of-needle-type-and-size-in-equine-cadavers
#12
S Nannarone, G Bini, M Vuerich, L Menchetti, R Arcelli, G Angeli
The aim of this study was to investigate a new approach for equine maxillary nerve blocks, which can facilitate several orofacial surgeries. Current techniques aim at the maxillary foramen and approach via the zygomatic arch, conferring the risk of injury to several delicate structures in the target area. To investigate the feasibility of a retrograde approach from the infraorbital foramen, an anatomic study of the infraorbital canal and its surrounding structures was performed on 13 cadaveric skulls using computed tomography and anatomical dissection...
November 2016: Veterinary Journal
https://www.readbyqxmd.com/read/27752216/a-modified-leclerc-procedure-with-oblique-osteotomy-and-v-shaped-notch-for-habitual-dislocation-of-the-temporomandibular-joint
#13
Satoshi Kushida, Natsuko Kakudo, Kenji Kusumoto
INTRODUCTION: In patients with habitual dislocation of the temporomandibular joint, anterior dislocation readily occurs with mouth opening in the normal range. METHODS: This short paper describes our novel procedure, modified zygomatic arch osteotomy reported by LeClerc et al., with oblique osteotomy to create a V-shaped notch at the tip for more accurate locking. CONCLUSION: The technique obtained favorable results without the recurrence of TMJ dislocation...
September 2016: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/27722226/effectiveness-of-subperiosteal-bone-anchor-onplant-placement-in-the-anterior-highly-atrophic-maxilla-for-cross-arch-prosthetic-rehabilitation-results-from-a-pilot-study
#14
Simone Heuberer, Christian Ulm, Konstantin Zauza, Werner Zechner, Georg Watzek, Gabriella Dvorak
PURPOSE: The present prospective pilot study aimed to evaluate the feasibility of Onplants (Onplant Orthodontic System) off label use in the highly atrophic edentulous maxillae of adult patients to avoid bone grafting and conventional dental or zygomatic implants. MATERIAL AND METHODS: Two Onplants were placed subperiosteally in the anterior part of the hard palate in five adult patients presenting a highly atrophic edentulous maxilla, class V or VI, according to Cawood and Howell...
2016: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/27677685/combined-use-of-facial-osteoplasty-and-orthognathic-surgery-for-treatment-of-dentofacial-deformities
#15
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
https://www.readbyqxmd.com/read/27671791/viable-ednra-y129f-mice-feature-human-mandibulofacial-dysostosis-with-alopecia-mfda-syndrome-due-to-the-homologue-mutation
#16
Sibylle Sabrautzki, Michael A Sandholzer, Bettina Lorenz-Depiereux, Robert Brommage, Gerhard Przemeck, Ingrid L Vargas Panesso, Alexandra Vernaleken, Lillian Garrett, Katharina Baron, Ali O Yildirim, Jan Rozman, Birgit Rathkolb, Christine Gau, Wolfgang Hans, Sabine M Hoelter, Susan Marschall, Claudia Stoeger, Lore Becker, Helmut Fuchs, Valerie Gailus-Durner, Martin Klingenspor, Thomas Klopstock, Christoph Lengger, Leuchtenberger Stefanie, Eckhard Wolf, Tim M Strom, Wolfgang Wurst, Martin Hrabě de Angelis
Animal models resembling human mutations are valuable tools to research the features of complex human craniofacial syndromes. This is the first report on a viable dominant mouse model carrying a non-synonymous sequence variation within the endothelin receptor type A gene (Ednra c.386A>T, p.Tyr129Phe) derived by an ENU mutagenesis program. The identical amino acid substitution was reported recently as disease causing in three individuals with the mandibulofacial dysostosis with alopecia (MFDA, OMIM 616367) syndrome...
December 2016: Mammalian Genome: Official Journal of the International Mammalian Genome Society
https://www.readbyqxmd.com/read/27663677/implant-prosthetic-rehabilitation-of-hemimaxillectomy-defects-with-cad-cam-suprastructures
#17
Christian Mertens, Jose de San Jose Gonzalez, Christian Freudlsperger, Jens Bodem, Johannes Krisam, Jürgen Hoffmann, Michael Engel
BACKGROUND: Patients with hemimaxillectomy defects after tumor surgery can alternatively be rehabilitated with dental obturators or microvascular flaps. When general medical or oncologic conditions do not permit microvascular surgery, dental obturators are the only solution, yet retention for edentulous patients is often poor. The aim of this study was to evaluate whether CAD/CAM suprastructures supported by implants placed in both residual alveolar ridges and contralateral zygomatic bone could enhance obturator stability and improve functional outcomes...
November 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27636184/is-less-always-better-keyhole-and-standard-subtemporal-approaches-evaluation-of-temporal-lobe-retraction-and-surgical-volume-with-and-without-zygomatic-osteotomy-in-a-cadaveric-model
#18
Serdar Ercan, Alba Scerrati, Phengfei Wu, Jun Zhang, Mario Ammirati
OBJECTIVE The subtemporal approach is one of the surgical routes used to reach the interpeduncular fossa. Keyhole subtemporal approaches and zygomatic arch osteotomy have been proposed in an effort to decrease the amount of temporal lobe retraction. However, the effects of these modified subtemporal approaches on temporal lobe retraction have never been objectively validated. METHODS A keyhole and a classic subtemporal craniotomy were executed in 4 fresh-frozen silicone-injected cadaver heads. The target was defined as the area bordered by the superior cerebellar artery, the anterior clinoid process, supraclinoid internal carotid artery, and the posterior cerebral artery...
September 16, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27632395/facial-nerve-axonal-analysis-and-anatomic-localization-in-donor-nerve-optimizing-axonal-load-for-cross-facial-nerve-grafting-in-facial-reanimation
#19
Austin Hembd, Purushottam A Nagarkar, Salim Saba, Dinah Wan, J Walter Kutz, Brandon Isaacson, Sachin Gupta, Charles L White, Rod J Rohrich, Shai M Rozen
PURPOSE: Donor nerve axonal count over 900 in two-stage reconstructions using cross facial nerve grafts is possibly associated with improved outcomes in facial reanimation. Facial nerve axonal analysis was performed to determine the ideal location for optimizing axonal load. Correlation between axonal number, branch diameter, and age was also assessed. METHODS: 28 fresh unpreserved cadaveric hemi-faces were dissected exposing the extracranial facial nerve branches...
September 14, 2016: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27631881/anatomical-recommendations-for-safe-botulinum-toxin-injection-into-temporalis-muscle-a-simplified-reproducible-approach
#20
Won-Kang Lee, Jung-Hee Bae, Kyung-Seok Hu, Takafumi Kato, Seong-Taek Kim
PURPOSE: The objective of this study was to simplify the anatomically safe and reproducible approach for BoNT injection and to generate a detailed topographic map of the important anatomical structures of the temporal region by dividing the temporalis into nine equally sized compartments. METHODS: Nineteen sides of temporalis muscle were used. The topographies of the superficial temporal artery, middle temporal vein, temporalis tendon, and the temporalis muscle were evaluated...
September 8, 2016: Surgical and Radiologic Anatomy: SRA
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