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https://www.readbyqxmd.com/read/28538573/pursuing-mirror-image-reconstruction-in-unilateral-microtia-customizing-auricular-framework-by-application-of-three-dimensional-imaging-and-three-dimensional-printing
#1
Hsin-Yu Chen, Li-Shia Ng, Chun-Shin Chang, Ting-Chen Lu, Ning-Hung Chen, Zung-Chung Chen
BACKGROUND: Advances in three-dimensional imaging and three-dimensional printing technology have expanded the frontier of presurgical design for microtia reconstruction from two-dimensional curved lines to three-dimensional perspectives. This study presents an algorithm for combining three-dimensional surface imaging, computer-assisted design, and three-dimensional printing to create patient-specific auricular frameworks in unilateral microtia reconstruction. METHODS: Between January of 2015 and January of 2016, six patients with unilateral microtia were enrolled...
June 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28538022/surgical-orthodontics
#2
Alexis M Strohl, Lauren Vitkus
PURPOSE OF REVIEW: The article reviews some commonly used orthodontic treatments as well as new strategies to assist in the correction of malocclusion. Many techniques are used in conjunction with surgical intervention and are a necessary compliment to orthognathic surgery. Basic knowledge of these practices will aid in the surgeon's ability to adequately treat the patient. RECENT FINDINGS: Many orthodontists and surgeons are eliminating presurgical orthodontics to adopt a strategy of 'surgery first' orthodontics in orthognathic surgery...
May 22, 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
https://www.readbyqxmd.com/read/28518181/a-semi-automatic-algorithm-for-preliminary-assessment-of-labial-gingiva-and-alveolar-bone-thickness-of-maxillary-anterior-teeth
#3
Sheng-Hung Chen, Hsun-Liang Chan, Yongning Lu, Sim-Heng Ong, Hom-Lay Wang, Eng Hong Ko, Po-Chun Chang
PURPOSE: Soft and hard tissue volumes are critical for implant placement and long-term stability. Although the literature has adequately addressed tissue biotypes of Western populations, pertinent information about Asian populations is limited. This study aimed to evaluate the soft and hard tissue profiles of the maxillary anterior teeth of the Taiwanese population using a semi-automatic algorithm. MATERIALS AND METHODS: Cone beam computed tomography images of 11 adults with well-aligned maxillary anterior teeth were overlaid with those of cast models, based on the tooth crowns manually outlined by two independent observers...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28516364/preserving-normal-facial-nerve-function-and-improving-hearing-outcome-in-large-vestibular-schwannomas-with-a-combined-approach-planned-subtotal-resection-followed-by-gamma-knife-radiosurgery
#4
Roy Thomas Daniel, Constantin Tuleasca, Mercy George, Etienne Pralong, Luis Schiappacasse, Michele Zeverino, Raphael Maire, Marc Levivier
OBJECTIVE: To perform planned subtotal resection followed by gamma knife surgery (GKRS) in a series of patients with large vestibular schwannoma (VS), aiming at an optimal functional outcome for facial and cochlear nerves. METHODS: Patient characteristics, surgical and dosimetric features, and outcome were collected prospectively at the time of treatment and during the follow-up. RESULTS: A consecutive series of 32 patients was treated between July 2010 and June 2016...
May 17, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28483229/use-of-three-dimensional-cad-cam-assisted-virtual-surgical-simulation-and-planning-in-the-pediatric-craniofacial-population
#5
Rachel Gray, Alexander Gougoutas, Vinh Nguyen, Jesse Taylor, Nicholas Bastidas
OBJECTIVE: Virtual Surgical Planning (VSP) and computer-aided design/computer-aided manufacturing (CAD/CAM) have recently helped improve efficiency and accuracy in many different craniofacial surgeries. Research has mainly focused on the use in the adult population with the exception of the use for mandibular distractions and cranial vault remodeling in the pediatric population. This study aims to elucidate the role of VSP and CAD/CAM in complex pediatric craniofacial cases by exploring its use in the correction of midface hypoplasia, orbital dystopia, mandibular reconstruction, and posterior cranial vault expansion...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28480084/concomitant-central-giant-cell-granuloma-and-aneurysmal-bone-cyst-in-a-young-child
#6
Deepika Pai, Abhay Taranath Kamath, Adarsh Kudva, Monica Monica Charlotte Solomon, Saurabh Kumar, Prem Sasikumar
Although Central Giant Cell Granuloma (CGCG) is a benign tumor of the jaw and aneurysmal bone cyst seen in children, its aggressive behavior causes extensive loss of hard tissue requiring wide excision and extensive rehabilitation. We report a rare case of concomitant CGCG and aneurysmal bone cyst in a two-year-old male child, involving the coronoid and condylar process. Young age, large tumor, its aggressive nature, and future growth of orofacial region pose a significant challenge in the management of such conditions...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28473088/acr-appropriateness-criteria-%C3%A2-suspected-liver%C3%A2-metastases
#7
Harmeet Kaur, Nicole M Hindman, Waddah B Al-Refaie, Hina Arif-Tiwari, Brooks D Cash, Victoria Chernyak, James Farrell, Joseph R Grajo, Jeanne M Horowitz, Michelle M McNamara, Richard B Noto, Aliya Qayyum, Tasneem Lalani, Ihab R Kamel
Liver metastases are the most common malignant liver tumors. The accurate and early detection and characterization of liver lesions is the key to successful treatment strategies. Increasingly, surgical resection in combination with chemotherapy is effective in significantly improving survival if all metastases are successfully resected. MRI and multiphase CT are the primary imaging modalities in the assessment of liver metastasis, with the relative preference toward multiphase CT or MRI depending upon the clinical setting (ie, surveillance or presurgical planning)...
May 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28466261/endoscopic-localization-of-colon-cancer-is-frequently-inaccurate
#8
Jennifer Nayor, Stephen R Rotman, Walter W Chan, Joel E Goldberg, John R Saltzman
BACKGROUND: Colonoscopic location of a tumor can influence both the surgical procedure choice and overall treatment strategy. AIMS: To determine the accuracy of colonoscopy in determining the location of colon cancer compared to surgical localization and to elucidate factors that predict discordant colon cancer localization. METHODS: We conducted a retrospective cross-sectional study of colon cancers diagnosed on colonoscopy at two academic tertiary-care hospitals and two affiliated community hospitals from 2012 to 2014...
May 2, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28459705/numerical-correlation-of-levator-advancement-in-preoperative-planning
#9
Valeria Makeeva, Sherry S Collawn, Evelina N Pierce, Mina S Mousa, Jennifer H Yang, Peter N Davison, Elodie C Jospitre
BACKGROUND: Several procedures have been proposed for the treatment of eyelid ptosis, and both levator advancement and levator plication are widely used to shorten the levator palpebrae superioris. The purpose of this study was to quantify perioperative lid measurements in patients undergoing bilateral levator aponeurosis advancements to aid in preoperative planning. METHODS: Between July 2014 and June 2016, the authors performed a retrospective analysis of all bilateral upper eyelid levator advancement procedures for ptosis performed by the senior surgeon...
June 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28439169/the-cortical-boundary-line-as-a-guide-for-incisor-re-positioning-with-anterior-segmental-osteotomies
#10
Abraham Vinod Korath, Ratna Padmanabhan, Anantanarayanan Parameswaran
Anterior alveolar anatomical constraints involving presurgical orthodontic incisor repositioning are often unrecognized and overlooked during orthodontic-surgical treatment planning. A clear discrimination of this cortical limitation is invaluable during the planning stage as it permits the consideration of alternative approaches like the anterior maxillary osteotomy for effecting the required incisor movement. A simple reference line termed the "Cortical Boundary Line" is introduced to facilitate the clinical translation of this information and through suitable case illustrations, the construction of the reference line using the conventional lateral cephalometric radiograph and its usefulness as an adjunct in aiding decisions on orthodontic incisor decompensation is highlighted...
June 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28419843/a-review-of-in-office-dynamic-image-navigation-for-extraction-of-complex-mandibular-third-molars
#11
Robert W Emery, Oxana Korj, Ravi Agarwal
PURPOSE: We performed a retrospective review of in-office removal of complex mandibular third molars with a dynamic image navigation system (DINS). MATERIALS AND METHODS: A retrospective review was conducted of cases completed from 2010 to 2014 by a single oral and maxillofacial surgeon. The average age of the patients was 47 years (range, 27 to 72 years). Extraction complexity was classified with Juodzbalys and Daugela's classification system. The included study cases had complexity scores of 9 or greater...
March 25, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28412109/reengineering-valve-patients-postdischarge-management-for-adapting-to-bundled-payment-models
#12
Michael S Koeckert, Patricia A Ursomanno, Mathew R Williams, Michael Querijero, Elias A Zias, Didier F Loulmet, Kevin Kirchen, Eugene A Grossi, Aubrey C Galloway
BACKGROUND: Bundled Payments for Care Improvement (BPCI) initiatives were developed by Medicare in an effort to reduce expenditures while preserving quality of care. Payment model 2 reimburses based on a target price for 90-day episode of care postprocedure. The challenge for valve patients is the historically high (>35%) 90-day readmission rate. We analyzed our institutional cardiac surgical service line adaptation to this initiative. METHODS: On May 1, 2015, we instituted a readmission reduction initiative (RRI) that included presurgical risk stratification, comprehensive predischarge planning, and standardized postdischarge management led by cardiac nurse practitioners (CNPs) who attempt to guide any postdischarge encounters (PDEs)...
March 10, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28363248/the-resting-state-functional-magnetic-resonance-imaging-regional-homogeneity-metrics-kendall-s-coefficient-of-concordance-regional-homogeneity-and-coherence-regional-homogeneity-are-valid-indicators-of-tumor-related-neurovascular-uncoupling
#13
Shruti Agarwal, Haris I Sair, Jay J Pillai
The aim of this study is to determine whether regional homogeneity (ReHo) of resting-state blood oxygenation level-dependent (BOLD) functional magnetic resonance imaging (rsfMRI) data based on Kendall's coefficient of concordance (KCC-ReHo) and coherence (Cohe-ReHo) metrics may allow detection of brain tumor-induced neurovascular uncoupling (NVU) in the sensorimotor network similar to findings in standard motor task-based BOLD fMRI (tbfMRI) activation. Twelve de novo brain tumor patients undergoing clinical fMRI exams (tbfMRI and rsfMRI) were included in this Institutional Review Board (IRB)-approved study...
May 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28337564/lower-face-cephalometry-based-on-quadrilateral-analysis-with-cone-beam-computed-tomography-a-clinical-pilot-study
#14
Adrienn Dobai, Tamás Vizkelety, Zsolt Markella, Adrienne Rosta, Ágnes Kucsera, József Barabás
OBJECTIVE: As most orthognathic surgeries focus on the lower face, the aim of this study was to transfer previously developed two-dimensional cephalometry-which is useful for surgeons in the orthognathic surgery of the lower face-to three-dimensional (3D) cephalometry by using cone-beam computed tomography (CBCT). We selected the quadrilateral lower face analysis developed by the surgeon Di Paolo, who focused only for the lower face and mentioned that data in millimeters are more easy to use than angles for surgeons...
June 2017: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28321965/robust-presurgical-functional-mri-at-7-t-using-response-consistency
#15
Pedro Lima Cardoso, Florian Ph S Fischmeister, Barbara Dymerska, Alexander Geißler, Moritz Wurnig, Siegfried Trattnig, Roland Beisteiner, Simon Daniel Robinson
Functional MRI is valuable in presurgical planning due to its non-invasive nature, repeatability, and broad availability. Using ultra-high field MRI increases the specificity and sensitivity, increasing the localization reliability and reducing scan time. Ideally, fMRI analysis for this application should identify unreliable runs and work even if the patient deviates from the prescribed task timing or if there are changes to the hemodynamic response due to pathology. In this study, a model-free analysis method-UNBIASED-based on the consistency of fMRI responses over runs was applied, to ultra-high field fMRI localizations of the hand area...
June 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28321342/presurgical-cone-beam-computed-tomography-bone-quality-evaluation-for-predictable-immediate-implant-placement-and-restoration-in-esthetic-zone
#16
Corina Marilena Cristache
Despite numerous advantages over multislice computed tomography (MSCT), including a lower radiation dose to the patient, shorter acquisition times, affordable cost, and sometimes greater detail with isotropic voxels used in reconstruction, allowing precise measurements, cone beam computed tomography (CBCT) is still controversial regarding bone quality evaluation. This paper presents a brief review of the literature on accuracy and reliability of bone quality assessment with CBCT and a case report with step-by-step predictable treatment planning in esthetic zone, based on CBCT scans which enabled the clinician to evaluate, depending on bone volume and quality, whether immediate restoration with CAD-CAM manufactured temporary crown and flapless surgery may be a treatment option...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28303317/evaluation-of-the-applicability-of-territorial-arterial-spin-labeling-in-meningiomas-for-presurgical-assessments-compared-with-3-dimensional-time-of-flight-magnetic-resonance-angiography
#17
Yiping Lu, Shihai Luan, Li Liu, Ji Xiong, Jianbo Wen, Jianxun Qu, Daoying Geng, Bo Yin
OBJECTIVES: To prospectively evaluate the application of territorial arterial spin labelling (t-ASL) in comparison with unenhanced three-dimensional time-of-flight magnetic resonance angiography (3D-TOF-MRA) in the identification of the feeding vasculature of meningiomas. METHODS: Thirty consecutive patients with suspected meningiomas underwent conventional MR imaging, unenhanced 3D-TOF-MRA and t-ASL scanning. Four experienced neuro-radiologists assessed the feeding vessels with different techniques separately...
March 16, 2017: European Radiology
https://www.readbyqxmd.com/read/28298819/diagnostic-accuracy-of-cone-beam-computed-tomography-in-identification-and-postoperative-evaluation-of-furcation-defects
#18
Natasha Pajnigara, Abhay Kolte, Rajashri Kolte, Nilufer Pajnigara, Vrushali Lathiya
BACKGROUND: Decision-making in periodontal therapeutics is critical and is influenced by accurate diagnosis of osseous defects, especially furcation involvement. Commonly used diagnostic methods such as clinical probing and conventional radiography have their own limitations. Hence, this study was planned to evaluate the dimensions of furcation defects clinically (pre- and post-surgery), intra-surgically, and by cone beam computed tomography (CBCT) (pre- and post-surgery). MATERIALS AND METHODS: The study comprised a total of 200 Grade II furcation defects in forty patients, with a mean age of 38...
July 2016: Journal of Indian Society of Periodontology
https://www.readbyqxmd.com/read/28281493/use-of-resting-state-fmri-in-planning-epilepsy-surgery
#19
REVIEW
Sharon Chiang, Zulfi Haneef, John M Stern, Jerome Engel
Epileptic seizures result from abnormal neuronal excitability and synchronization, affecting 0.5-1% of the population worldwide. Although anti-seizure drugs are often effective, a significant number of patients with epilepsy continue to experience refractory seizures and are candidates for surgical resection. Whereas standard presurgical evaluation has relied on intracranial electroencephalography (icEEG) and direct cortical stimulation to identify epileptogenic tissue and areas of cortex for which resection would produce clinical deficits, the invasive nature and limited spatial extent of icEEG has led to the investigation of less invasive imaging modalities as adjunctive tools in the presurgical workup...
2017: Neurology India
https://www.readbyqxmd.com/read/28261785/accuracy-of-intracranial-electrode-placement-for-stereoencephalography-a-systematic-review-and-meta-analysis
#20
REVIEW
Vejay N Vakharia, Rachel Sparks, Aidan G O'Keeffe, Roman Rodionov, Anna Miserocchi, Andrew McEvoy, Sebastien Ourselin, John Duncan
OBJECTIVE: Stereoencephalography (SEEG) is a procedure in which electrodes are inserted into the brain to help define the epileptogenic zone. This is performed prior to definitive epilepsy surgery in patients with drug-resistant focal epilepsy when noninvasive data are inconclusive. The main risk of the procedure is hemorrhage, which occurs in 1-2% of patients. This may result from inaccurate electrode placement or a planned electrode damaging a blood vessel that was not detected on the preoperative vascular imaging...
March 6, 2017: Epilepsia
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