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https://www.readbyqxmd.com/read/28623521/exploring-for-the-optimal-structural-design-for-the-3d-printing-technology-for-cranial-reconstruction-a-biomechanical-and-histological-study-comparison-of-solid-vs-porous-structure
#1
Jun Young Lim, Namhyun Kim, Jong-Chul Park, Sun K Yoo, Dong Ah Shin, Kyu-Won Shim
PURPOSE: Cranioplasty for recovering skull defects carries the risk for a number of complications. Various materials are used, including autologous bone graft, metallic materials, and non-metallic materials, each of which has advantages and disadvantages. If the use of autologous bone is not feasible, those artificial materials also have constraints in the case of complex anatomy and/or irregular defects. MATERIAL AND METHODS: This study used metal 3D-printing technology to overcome these existing drawbacks and analyze the clinical and mechanical performance requirements...
June 16, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28619674/frontal-cranioplasty-in-fronto-metaphyseal-dysplasia
#2
A Joly, A Pare, D Goga, B Laure
INTRODUCTION: Fronto-metaphyseal dysplasia (FMD), also called Gorlin-Cohen syndrome, is a rare syndrome initially described in 1969 by Gorlin and Cohen. Patients present skeletal dysplasia, craniofacial malformations and digit abnormalities. Craniofacial phenotype of FMD is characterized by supraorbital hyperostosis, hypertelorism, down-slanting palpebral fissures, broad nasal bridge and micrognathia. Here we report the first adult case of craniofacial reconstruction with frontal cranioplasty in a patient with FMD...
June 12, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28617738/the-whitaker-classification-of-craniosynostosis-outcomes-an-assessment-of-inter-rater-reliability
#3
Ari M Wes, Sanjay Naran, James Sun, Daniel Mazzaferro, Wen Xu, Phuong Nguyen, Linton A Whitaker, Scott P Bartlett, Jesse A Taylor
PURPOSE: The Whitaker classification (WC) is a simple and widely used system for describing aesthetic outcomes after craniosynostosis surgery. The purpose of this study is to evaluate its inter-rater reliability for patients who have undergone frontal-orbital surgery. METHODS: A retrospective review of patients with craniosynostosis who underwent surgical intervention at a tertiary referral center was conducted. Inclusion criteria were: single-suture craniosynostosis, surgical intervention before age two years, and photographs taken prior to revisions between 5 and 20 years of age...
June 14, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28609471/finite-element-analysis-of-6-large-pmma-skull-reconstructions-a-multi-criteria-evaluation-approach
#4
Angela Ridwan-Pramana, Petr Marcián, Libor Borák, Nathaniel Narra, Tymour Forouzanfar, Jan Wolff
In this study 6 pre-operative designs for PMMA based reconstructions of cranial defects were evaluated for their mechanical robustness using finite element modeling. Clinical experience and engineering principles were employed to create multiple plan options, which were subsequently computationally analyzed for mechanically relevant parameters under 50N loads: stress, strain and deformation in various components of the assembly. The factors assessed were: defect size, location and shape. The major variable in the cranioplasty assembly design was the arrangement of the fixation plates...
2017: PloS One
https://www.readbyqxmd.com/read/28607825/cranioplasty-indications-procedures-and-outcome-an-institutional-experience
#5
Syed M Andrabi, Arif H Sarmast, Altaf R Kirmani, Abdul R Bhat
BACKGROUND: Cranioplasty, the repair of a skull vault defect by insertion of an object (bone or nonbiological materials such as metal or plastic plates), is a well-known procedure in modern neurosurgery. Brain protection and cosmetic aspects are the major indications of cranioplasty. A retroprospective study was conducted for evaluating the indications, materials used, complications, and outcome of cranioplasty. METHODS: This study was prospective from August 2013 to September 2015 and retrospective from August 2010 to July 2013...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28607816/recurrence-case-of-rare-scalp-dermatofibrosarcoma-protuberans-two-case-reports-of-a-wide-radical-excision-craniectomy-bone-involvement-followed-by-cranioplasty-and-reconstruction
#6
Ahmad Faried, Wargian Hadisaputra, Muhammad Z Arifin
BACKGROUND: Dermatofibrosarcoma protuberans (DFSP) is a rare low-grade sarcoma of the fibroblast originating from the dermal layer of the skin, characterized by a locally aggressive growth and high rate of local recurrence. CASE DESCRIPTION: Two patients underwent a wide radical excision of recurrent scalp DFSP which was reconstructed with translational skin flap and split-thickness skin graft. We described above cases several years ago with a local excision of the tumor; recently, they developed local recurrence of DFSP with calvarial involvement...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28593628/outcome-of-microsurgical-revascularization-in-patients-with-moyamoya-disease-first-report-from-iranian-population
#7
Abdolkarim Rahmanian, Mohammad Sadehgh Masoudi, Fariborz Ghaffarpasand, Mohammad Hossein Ashraf, Ehsanali Alibai
AIM: The aim of this study was to report the outcome of microsurgical revascularization in patients with moyamoya disease in Southern Iran. MATERIAL AND METHODS: This cross-sectional study was conducted in Southern Iran during a 7-year period from 2009 to 2016. All the patients with moyamoya disease (confirmed with digital substraction angiography) who underwent microsurgical revascularization (extracranial-intracranial bypass or synangiosis) were included. All the patients were followed for at least 1 year and the outcome was measured using Glasgow outcome scale (GOS) and modified Rankin scale (MRS)...
May 7, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28585887/symptomatic-ptosis-cerebelli-after-suboccipital-craniectomy-in-a-patient-with-severe-brain-trauma
#8
Ana M Castaño-Leon, Santiago Cepeda, Igor Paredes, Pedro A Gómez, Luis Jiménez-Roldán, Alfonso Lagares, Angel Pérez-Núñez
PRIMARY OBJECTIVE: To report the first case of symptomatic cerebellar ptosis after a large suboccipital craniectomy in a patient with severe brain trauma and a review of the literature. PATIENT AND METHODS: A 36-year-old man suffered severe traumatic brain injury after a four-metre fall. He underwent a large suboccipital craniectomy because his computed tomography scan revealed a posterior fossa subdural haematoma and cerebellar swelling. Four weeks after admission, he developed communicating hydrocephalus, and a ventriculoperitoneal shunt was placed...
June 6, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28584308/cranioplasty-as-the-return-to-work-factor-112-patients-with-cranial-defects-treated-in-the-department-of-neurosurgery-at-the-medical-university-of-lodz
#9
Piotr Kasprzak, Elżbieta Ormezowska, Dariusz Jaskólski
OBJECTIVES: The number of craniectomies and the consequent reconstructive procedures has grown during the past decades. Cranial defects and methods of their repair could have some influence on work capability of the patients and their employability. MATERIAL AND METHODS: The authors analyzed a group of 112 patients with cranial defects treated in the Department of Neurosurgery at the Medical University of Lodz, Poland, in the course of the katamnestic period longer than 6 months after reconstructive operation, and observed them between February 2008 and February 2015...
May 29, 2017: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/28582300/analyzing-the-cost-of-autogenous-cranioplasty-versus-custom-made-patient-specific-alloplastic-cranioplasty
#10
Mohamed Amir Mrad, Khalid Murrad, Oleh Antonyshyn
PURPOSE: Comparing expenses related to autogenous cranial vault reconstruction versus custom-made patient-specific alloplastic cranioplasty. METHODS: The authors retrospectively reviewed charts of a group of patients who underwent autogenous cranioplasty and poly-ether-ether ketone (PEEK) cranioplasty. The data collected from the patient files included demographic information, details of the surgery, postoperative recovery data, and also duration of surgery. The authors also added costs related to the length of surgery, utilization of intensive care unit, length of hospital stay, amount and seriousness of complications, and hardware cost...
June 2, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28562569/traumatic-open-depressed-cranial-fracture-causing-occlusion-of-posterior-superior-sagittal-sinus-case-report
#11
Han-Song Sheng, Fang Shen, Jian Lin, Guang-Hui Bai, Fen-Chun Lin, Dan-Dong Li, Nu Zhang
RATIONALE: The superior sagittal sinus (SSS) is the major dural sinuses that receive a considerable amount of venous drainage. Interruption of its posterior third has been suggested to cause intracranial hypertension and lead to potentially fatal consequences. PATIENT CONCERNS: We presented a 22-year-old man with a severe headache and scalp bleeding after a head chop wound. Physical examination identified a 20-cm straight laceration in his parietooccipital scalp...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28559947/visual-and-quantitative-analysis-of-cisternography-for-the-detection-of-cerebrospinal-fluid-leakage
#12
Eun Kyoung Choi, Jin Kyoung Oh, Sonya Youngju Park, Ikdong Yoo, Dong-Hyun Kim, Yong-An Chung
We herein present a case of a 29-year-old man with clear rhinorrhea, which persisted for 8 years following a myringotomy. After cotton pledgets were placed in several different regions of the nasal cavity, cisternography using Tc-99m DTPA was performed to measure the radioactivity of each pledget. Cisternography showed subtle uptake in the nasal cavity. However, intense uptake was detected in the pledget placed in the right eustachian tube orifice, where the pledget:serum count ratio was 10.3:1. The patient underwent duroplasty and cranioplasty, and the rhinorrhea resolved...
June 2017: Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28550406/statistical-shape-modelling-to-aid-surgical-planning-associations-between-surgical-parameters-and-head-shapes-following-spring-assisted-cranioplasty
#13
Naiara Rodriguez-Florez, Jan L Bruse, Alessandro Borghi, Herman Vercruysse, Juling Ong, Greg James, Xavier Pennec, David J Dunaway, N U Owase Jeelani, Silvia Schievano
PURPOSE: Spring-assisted cranioplasty is performed to correct the long and narrow head shape of children with sagittal synostosis. Such corrective surgery involves osteotomies and the placement of spring-like distractors, which gradually expand to widen the skull until removal about 4 months later. Due to its dynamic nature, associations between surgical parameters and post-operative 3D head shape features are difficult to comprehend. The current study aimed at applying population-based statistical shape modelling to gain insight into how the choice of surgical parameters such as craniotomy size and spring positioning affects post-surgical head shape...
May 26, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28514018/salvage-of-postcranioplasty-implant-exposure-using-free-tissue-transfer
#14
Pang-Yun Chou, Cheng-Hung Lin, Chung-Chen Hsu, Wei-Hsun Yang, Alex A Kane, Chih-Hung Lin
BACKGROUND: Refractory implant exposure is frustrating after cranioplasty. The purpose of this study was for the authors to present their experience with free tissue transfer for salvage of postcranioplasty implant exposure. METHODS: A retrospective medical chart review was conducted on all free tissue transfers performed for exposed implant coverage after cranioplasty between January 2004 and February 2016. RESULTS: Twelve free flaps were performed in 11 patients who underwent postcranioplasty with implant exposure, and whose attempted implant coverage using locoregional flaps had failed...
May 17, 2017: Head & Neck
https://www.readbyqxmd.com/read/28512613/comparison-of-complications-following-cranioplasty-using-a-sterilized-autologous-bone-flap-or-polymethyl-methacrylate
#15
Sung Hoon Kim, Dong Soo Kang, Jin Hwan Cheong, Jung Hee Kim, Kwan Young Song, Min Ho Kong
OBJECTIVE: The aims of current study are to compare complications following cranioplasty (CP) using either sterilized autologous bone or polymethyl methacrylate (PMMA), and to identify the risk factors for two of the most common complications: bone flap resorption (BFR) and surgical site infection (SSI). METHODS: Between January 2004 and December 2013, 127 patients underwent CP and were followed at least 12 months. Variables, including sex, age, initial diagnosis, time interval between decompressive craniectomy (DC) and CP, operation time, size of bone flap, and presence of ventriculo-peritoneal shunt, were analyzed to identify the risk factors for BFR and SSI...
April 2017: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/28512612/review-of-cranioplasty-after-decompressive-craniectomy
#16
REVIEW
Yong Jun Cho, Suk Hyung Kang
Cranioplasty is an in evitable operation conducted after decompressive craniectomy (DC). The primary goals of cranioplasty after DC are to protect the brain, achieve a natural appearance and prevent sinking skin flap syndrome (or syndrome of the trephined). Furthermore, restoring patients' functional outcome and supplementing external defects helps patients improve their self-esteem. Although early cranioplasty is preferred in recent year, optimal timing for cranioplasty remains a controversial topic. Autologous bone flaps are the most ideal substitute for cranioplasty...
April 2017: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/28505594/the-rheological-behavior-of-a-fast-setting-calcium-phosphate-bone-cement-and-its-dependence-on-deformation-conditions
#17
Erdem Şahin, Dilhan M Kalyon
Calcium phosphate cements are osteoconductive biomaterials that are widely used for bone repair and regeneration applications, including spinal fusion, vertebroplasty, khyphoplasty, cranioplasty and periodontal surgeries. The flow and deformation behavior (rheology) and injectability of the calcium phosphate bone cements to the treatment site are governed by the setting kinetics of the cement during which the initially flowable, viscous cement paste transforms into a rigid elastic solid. Here time-dependent development of the linear viscoelastic properties of a brushite-forming calcium phosphate cement are characterized and linked to the mechanism and kinetics of the setting reaction and to the injectability window available during the surgical applications of the cement...
May 10, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28504874/cranioplasty-with-adipose-derived-stem-cells-beta-tricalcium-phosphate-granules-and-supporting-mesh-six-year-clinical-follow-up-results
#18
Tuomo Thesleff, Kai Lehtimäki, Tero Niskakangas, Sanna Huovinen, Bettina Mannerström, Susanna Miettinen, Riitta Seppänen-Kaijansinkko, Juha Öhman
Several alternative techniques exist to reconstruct skull defects. The complication rate of the cranioplasty procedure is high and the search for optimal materials and techniques continues. To report long-term results of patients who have received a cranioplasty using autologous adipose-derived stem cells (ASCs) seeded on beta-tricalcium phosphate (betaTCP) granules. Between 10/2008 and 3/2010, five cranioplasties were performed (four females, one male; average age 62.0 years) using ASCs, betaTCP granules and titanium or resorbable meshes...
May 15, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28502686/customized-polymethylmethacrylate-cranioplasty-implants-using-3d-printed-polylactic-acid-molds-technical-note-with-2-illustrative-cases
#19
Joe Abdel Hay, Tarek Smayra, Ronald Moussa
OBJECTIVE: Prefabricated customized cranioplasty implants are anatomically more accurate than manually shaped acrylic implants but remain costly. The authors describe a new cost-effective technique of producing customized polymethylmethacrylate (PMMA) cranioplasty implants using prefabricated 3D printed molds. METHODS: The first patient had a left frontal cranial defect following a craniotomy for a glial tumor. A 3D image of his skull was obtained from axial 0.6mm computed tomography (CT) scan images...
May 11, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28498056/risk-factors-for-surgical-site-infections-and-assessment-of-vancomycin-powder-as-a-preventive-measure-in-patients-undergoing-first-time-cranioplasty
#20
Kingsley O Abode-Iyamah, Hsiu-Yin Chiang, Nolan Winslow, Brian Park, Mario Zanaty, Brian J Dlouhy, Oliver E Flouty, Zachary D Rasmussen, Loreen A Herwaldt, Jeremy D Greenlee
OBJECTIVE Craniectomy is often performed to decrease intracranial pressure following trauma and vascular injuries. The subsequent cranioplasty procedures may be complicated by surgical site infections (SSIs) due to prior trauma, foreign implants, and multiple surgeries through a common incision. Several studies have found that intrawound vancomycin powder (VP) is associated with decreased risk of SSIs after spine operations. However, no previously published study has evaluated the effectiveness of VP in cranioplasty procedures...
May 12, 2017: Journal of Neurosurgery
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