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https://www.readbyqxmd.com/read/28318573/ophthalmic-outcomes-of-fractured-zygomas
#1
R J McGalliard, J Kimpton, N M H McLeod
In patients with fractures of the zygomatic complex, computed tomography (CT) often identifies extensive defects in the orbital floor. Some surgeons recommend routine exploration and repair of these defects during repair of the zygoma, while others advocate a more selective approach, but there is a paucity of evidence either way. We report a retrospective case series of 50 patients who had open reduction and internal fixation of zygomatic fractures by a single surgeon in the maxillofacial department at the John Radcliffe Hospital, Oxford, between 2011and 2014...
March 16, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28317556/skull-5-from-dmanisi-descriptive-anatomy-comparative-studies-and-evolutionary-significance
#2
G Philip Rightmire, Marcia S Ponce de León, David Lordkipanidze, Ann Margvelashvili, Christoph P E Zollikofer
A fifth hominin skull (cranium D4500 and mandible D2600) from Dmanisi is massively constructed, with a large face and a very small brain. Traits documented for the first time in a basal member of the Homo clade include the uniquely low ratio of endocranial volume to basicranial width, reduced vertex height, angular vault profile, smooth nasal sill coupled with a long and sloping maxillary clivus, elongated palate, and tall mandibular corpus. The convex clivus and receding symphysis of skull 5 produce a muzzle-like form similar to that of Australopithecus afarensis...
March 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28306330/effect-of-changing-the-head-position-on-accuracy-of-transverse-measurements-of-the-maxillofacial-region-made-on-cone-beam-computed-tomography-and-conventional-posterior-anterior-cephalograms
#3
Abbas Shokri, Amirfarhang Miresmaeili, Nasrin Farhadian, Sepideh Falah-Kooshki, Payam Amini, Najmeh Mollaie
OBJECTIVES: This study aimed to assess the effect of head position on the accuracy of transverse measurements of the maxillofacial region on cone beam computed tomography (CBCT) and conventional posterior-anterior (PA) cephalograms. The second objective of this study was to find skull positions with the greatest and smallest effect on transverse measurements in the maxillofacial region. METHODS: PA cephalograms and CBCT scans were obtained from 10 dry human skulls in seven positions namely the central position, 10° and 20° rotations, 10° and 20° tilts and 10° and 20° tips...
March 17, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28296982/management-of-extraoral-complications-in-a-patient-treated-with-four-zygomatic-implants
#4
Andrew Dawood, Nicholas Kalavresos
This article details the significant complications associated with treatment of a patient who underwent maxillary reconstruction based entirely on zygomatic implants. The use of zygomatic implants is becoming increasingly widespread, and treatment has been shown to be predictable and generally free of surgical complications. However, extending from the maxillary alveolus, alongside or through the maxillary antrum, toward the zygoma or orbital rim, these long implants have the potential to create a range of complications that may be more serious than those encountered with conventional dental implants...
March 15, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28296944/multiple-osteochondromas-of-the-antlers-and-cranium-in-a-free-ranging-white-tailed-deer-odocoileus-virginianus
#5
Uwe Kierdorf, Karl V Miller, Stefan Flohr, Santiago Gomez, Horst Kierdorf
This paper reports a case of multiple osteochondromas affecting the antlers and the left zygomatic bone of a free-ranging adult white-tailed buck (Odocoileus virginianus) from Georgia, USA. Along with a few postcranial bones, the antlered cranium of the individual was found in a severely weathered condition and devoid of any soft tissue. The antlers exhibited five pedunculated exostoses that were composed of cancellous bone and, in their peripheral portions, also mineralized cartilage. The largest of the exostoses, located on the right antler, had a maximum circumference of 55 cm...
2017: PloS One
https://www.readbyqxmd.com/read/28291687/structural-biomechanics-of-the-craniomaxillofacial-skeleton-under-maximal-masticatory-loading-inferences-and-critical-analysis-based-on-a-validated-computational-model
#6
Amir R Pakdel, Cari M Whyne, Jeffrey A Fialkov
BACKGROUND: The trend towards optimizing stabilization of the craniomaxillofacial skeleton (CMFS) with the minimum amount of fixation required to achieve union, and away from maximizing rigidity, requires a quantitative understanding of craniomaxillofacial biomechanics. This study uses computational modeling to quantify the structural biomechanics of the CMFS under maximal physiologic masticatory loading. METHODS: Using an experimentally validated subject-specific finite element (FE) model of the CMFS, the patterns of stress and strain distribution as a result of physiological masticatory loading were calculated...
February 17, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28280709/chemosis-as-complication-in-transconjunctival-approach-for-orbital-trauma
#7
Sergio Olate, Celso Palmieri, Márcio de Moraes
The aim of this report was to discuss a complication resulting from a transconjunctival approach to treating an orbital fracture. A 30-year-old male patient presented with a fracture to the zygomatic orbital complex. He was treated with transconjunctival conventional surgical treatment. Two days after surgical treatment, the patient presented with secondary chemosis which was initially slight and then subsequently worsened. The clinical situation was managed with topical and systemic corticosteroids and resolved within one postoperative month...
February 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/28280677/anatomical-variation-of-zygomatic-nerve-branches-around-zygomaticus-major-muscle-in-facelift
#8
Min-Hee Ryu, David Kahng
No abstract text is available yet for this article.
February 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28273213/reconstruction-of-face-and-scalp-after-dog-bites-in-children
#9
Jefferson Lessa Soares Macedo, Simone Corrêa Rosa, Murilo Neves DE Queiroz, Tabatha Gonçalves Andrade Castelo Branco Gomes
OBJECTIVE: to evaluate the immediate reconstruction of face and scalp after canine bites in children. METHODS: we conducted a prospective series of cases treated at the Emergency Unit of the Asa Norte Regional Hospital, Brasília - DF, from January 1999 to December 2014. At the time of patient admission to the emergency, the primary wound closure of the face and scalp bite was performed, regardless of the time or day of the event. The primary treatment of the bites was by means of direct suture, flaps rotation or grafting, depending on the type of wound and surgeon's decision...
December 2016: Revista do Colégio Brasileiro de Cirurgiões
https://www.readbyqxmd.com/read/28272152/aesthetic-reconstruction-of-the-frontotemporal-region-the-extended-a-t-plasty-a-workhorse-revisited
#10
Beniamino Brunetti, Stefania Tenna, Igor Poccia, Francesco Segreto, Paolo Persichetti
BACKGROUND: A-T plasty has long been a workhorse for defects located around the eyebrow or in the upper and lower lip. It allows like-with-like reconstruction with placement of the scars in natural creases or subunit junctions. In this article, the authors describe their refined technique to specifically address moderate to large size defects of the frontotemporal, preauricular, and zygomatic regions. MATERIALS AND METHODS: Thirty consecutive patients underwent reconstruction with the extended A-T plasty at our institution after skin cancer excision...
March 7, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28219120/accuracy-of-a-real-time-surgical-navigation-system-for-the-placement-of-quad-zygomatic-implants-in-the-severe-atrophic-maxilla-a-pilot-clinical-study
#11
Kuo-Feng Hung, Feng Wang, Hao-Wei Wang, Wen-Jie Zhou, Wei Huang, Yi-Qun Wu
BACKGROUND: A real-time surgical navigation system potentially increases the accuracy when used for quad-zygomatic implant placement. PURPOSE: To evaluate the accuracy of a real-time surgical navigation system when used for quad zygomatic implant placement. MATERIALS AND METHODS: Patients with severely atrophic maxillae were prospectively recruited. Four trajectories for implants were planned, and zygomatic implants were placed using a real-time surgical navigation system...
February 20, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28213192/trans-frontal-sinus-subcranial-approach-to-olfactory-groove-meningiomas-surgical-results-clinical-and-functional-outcome-in-a-consecutive-series-of-21-patients
#12
Lina Raffaella Barzaghi, Alfio Spina, Filippo Gagliardi, Nicola Boari, Pietro Mortini
BACKGROUND: The trans-frontal-sinus-subcranial approach (TFSSA) allows for direct exposure and removal of olfactory groove meningiomas (OGMs), without any brain retraction. Compared to other skull base approaches (like fronto-orbito-basal, transbasal, subcranial, fronto-orbito-zygomatic and one-and-half approach), it could offer the same advantages but it is less invasive. OBJECT: We report the results in a series of 21 consecutive patients harboring OGMs and operated through TFSSA, in order to propose a viable alternative approach...
February 14, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28210408/patterns-of-maxillofacial-fractures-in-uttar-pradesh-india
#13
Padmanidhi Agarwal, Divya Mehrotra, Rajul Agarwal, Sumit Kumar, Rahul Pandey
This study aimed to obtain dependable epidemiologic data of the variation in cause and characteristics of maxillofacial fractures by identifying, describing, and quantifying trauma. This retrospective study was conducted in the state of Uttar Pradesh, India, over 1 year, based on a systematic computer-assisted database search from March 2015 to March 2016 for maxillofacial fractures. The demographics, etiology, geographic distribution, date of injury, site and number of fractures, and type of intervention were recorded for each...
March 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28210406/use-of-c-arm-to-assess-reduction-of-zygomatic-complex-fractures-a-comparative-study
#14
Atmakuru Venkata Maheedhar, C Ravindran, Emmanuel D S Azariah
The aim of this study was to analyze the use of C-arm and its significance in accurate reduction of zygomaticomaxillary complex (ZMC) fractures. Orbital volume is used as parameter to compared pre- and postoperative volumes of injured orbit. Differences in orbital volume calculated in cases done with intraoperative imaging and in controls treated without the use of intraoperative imaging were evaluated using Student t-test. C-arm is definitively an effective tool in the armamentarium of oral and maxillofacial surgery in assessment of reduction of ZMC fracture...
March 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28210401/zygomatic-intraosseous-hemangioma-case-report-and-literature-review
#15
REVIEW
David B Powers, Elda Fisher, Detlev Erdmann
Intraosseous hemangiomas are uncommon intrabony lesions, representing approximately 0.5 to 1% of all intraosseous tumors. Their description varies from "benign vasoformative neoplasms" to true hamartomatous proliferations of endothelial cells forming a vascular network with intermixed fibrous connective tissue stroma. These commonly present as a firm, painless swelling. Intraosseous hemangiomas present more commonly in females than in males and most likely occur in the fourth decade of life. The most common etiology of intraosseous hemangioma is believed to be prior trauma to the area...
March 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28203510/midface-osteotomies-for-feminization-of-the-facial-skeleton
#16
T Kalle Lundgren, Filip Farnebo
Facial feminization surgery is a term to describe the surgical alteration of a masculine facial appearance to a more feminine appearance, which is most commonly performed for male-to-female transsexual individuals. To alter the midfacial relations, segmentalized osteotomies were performed in selected patients expanding on the established techniques for facial feminization surgery. All patients underwent a preoperative 3D computerized tomography scan and 3D photography before and after the surgery. The inclusion of the midface in surgery was determined based on the relative projection and angle of the zygomatic body compared with the supraorbital region (the supraorbital region was reduced in all patients)...
January 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28198771/correlation-between-facial-nerve-axonal-load-and-age-and-its-relevance-to-facial-reanimation
#17
Austin Hembd, Purushottam Nagarkar, Justin Perez, Andrew Gassman, Philip Tolley, Joan Reisch, Charles L White, Shai Rozen
PURPOSE: Two-stage facial reanimation procedures with a cross-facial nerve graft often have unsatisfactory results in the older patient. Although the cause of result variability is likely multifactorial, some studies suggest that increased donor nerve axonal load improves function of a free muscle transfer after a cross-facial nerve graft. This study attempts to characterize the relationship between age and facial nerve axonal load. METHODS: 63 fresh, cadaveric heads were dissected to expose the facial nerve...
February 13, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28128087/direct-insertion-of-muscle-fibers-is-not-restricted-to-facial-skin
#18
Uwe Wollina
Facial musculature is divided into masticatory muscles, i.e. M. masseter and M. buccalis, with bony insertions and smaller facial muscles involved in facial expression, which insert into bone and skin. There are four fixed osteocutaneous points of the face, i.e. zygomatic (Mac Gregor), mandibular (Furnas), orbital (Psillakis), and masseteric with an antigravitational effect and functional role in facial expression (1,2). In other body parts, the direct insertion of muscle fibers into skin has not been reported...
December 2016: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/28122465/clinical-profile-and-triggering-factors-for-acquired-bilateral-nevus-of-ota-like-macules
#19
Qi Zhang, Cheng Tan, Pei Jiang, Gang Yang
BACKGROUD Acquired, bilateral nevus of Ota-like macules (ABNOM) is one of the most common dermal melanocytoses. Although there are some literatures on ABNOM, its clinical features and etiopathogenetic factors have not been fully understood. OBJECTIVE To determine the prevalence and characteristics of ABNOM among the Chinese patients. METHODS A survey was carried out using the clinical examination and a questionnaire on 3,212 first-time outpatients in our dermatology department, and 102 cases of ABNOM were subsequently enrolled...
January 25, 2017: Cutaneous and Ocular Toxicology
https://www.readbyqxmd.com/read/28121883/evaluating-the-efficacy-of-monobloc-distraction-in-the-crouzon-pfeiffer-craniofacial-deformity-using-geometric-morphometrics
#20
Richard Visser, Clifford F Ruff, Freida Angullia, Allan J T Ponniah, N U Owase Jeelani, Jonathan A Britto, Maarten J Koudstaal, David J Dunaway
BACKGROUND: Crouzon-Pfeiffer syndrome is caused by mutations predominantly in the FGFR2 gene leading to syndromic craniosynostosis and midfacial hypoplasia. Monobloc distraction aims to correct both functional and aesthetic disharmony as a result of midfacial hypoplasia. This study evaluates the corrective effects and effectiveness of monobloc distraction in Crouzon-Pfeiffer patients. METHODS: Preoperative and postoperative scans were collected from 20 Crouzon and two Pfeiffer patients aged 7 to 20 years...
February 2017: Plastic and Reconstructive Surgery
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