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Implant restoration

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https://www.readbyqxmd.com/read/27926827/decoding-hand-gestures-from-primary-somatosensory-cortex-using-high-density-ecog
#1
Mariana P Branco, Zachary V Freudenburg, Erik J Aarnoutse, Martin G Bleichner, Mariska J Vansteensel, Nick F Ramsey
Electrocorticography (ECoG) based Brain-Computer Interfaces (BCIs) have been proposed as a way to restore and replace motor function or communication in severely paralyzed people. To date, most motor-based BCIs have either focused on the sensorimotor cortex as a whole or on the primary motor cortex (M1) as a source of signals for this purpose. Still, target areas for BCI are not confined to M1, and more brain regions may provide suitable BCI control signals. A logical candidate is the primary somatosensory cortex (S1), which not only shares similar somatotopic organization to M1, but also has been suggested to have a role beyond sensory feedback during movement execution...
December 4, 2016: NeuroImage
https://www.readbyqxmd.com/read/27924941/progressive-muscle-cell-delivery-as-a-solution-for-volumetric-muscle-defect-repair
#2
Ji Hyun Kim, In Kap Ko, Anthony Atala, James J Yoo
Reconstructing functional volumetric tissue in vivo following implantation remains a critical challenge facing cell-based approaches. Several pre-vascularization approaches have been developed to increase cell viability following implantation. Structural and functional restoration was achieved in a preclinical rodent tissue defect; however, the approach used in this model fails to repair larger (>mm) defects as observed in a clinical setting. We propose an effective cell delivery system utilizing appropriate vascularization at the site of cell implantation that results in volumetric and functional tissue reconstruction...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27914976/cementless-lateralized-stems-in-primary-tha-mid-term-survival-and-risk-factors-for-failure-in-172-stems
#3
C Courtin, A Viste, F Subtil, O Cantin, R Desmarchelier, M H Fessy
INTRODUCTION: Increasing the femoral offset when performing total hip arthroplasty (THA) theoretically increases the stresses and risks of the stem not integrating itself into bone. But this concept has not been validated for cementless stems; this led us to conduct a retrospective study to determine: (1) risk factors for the occurrence of symptomatic femoral radiological abnormalities, (2) the incidence of these abnormal radiological findings, (3) the revision rate for aseptic non-integration of a cementless lateralized stem...
November 30, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27912753/radiographic-evaluation-of-early-periprosthetic-acetabular-bone-contrast-and-prosthetic-head-acetabular-coverage-after-uncemented-and-cemented-total-hip-prosthesis-in-dogs
#4
Ayman A Mostafa, Karin Lucas, Ingo Nolte, Patrick Wefstaedt
BACKGROUND: Coxofemoral osteoarthritis is a chronic, disabling condition affecting people and dogs, with THA providing an excellent return to function in severely affected joints. The principal role of THA is to restore an adequate range of motion to the hip joint while transferring load from the acetabulum in order to improve the survival of the implant and enhance the limb function in the short and long terms. The objectives of the study reported here were, therefore, to radiographically evaluate periprosthetic acetabular bone GV and to assess prosthetic head acetabular coverage after 4 months of uncemented and cemented THA in dogs...
December 3, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27911116/finding-the-right-route-for-insulin-delivery-an-overview-of-implantable-pump-therapy
#5
Lia Bally, Hood Thabit, Roman Hovorka
Implantable pump therapy adopting the intraperitoneal route of insulin delivery has been available for the past three decades. The key rationale for implantable pump therapy is the restoration of the portal-peripheral insulin gradient of the normal physiology. Uptake in clinical practice is limited to specialized centers and selected patient populations. Areas covered: Implantable pump therapy is discussed, including technical aspects, rationale for its use, and glycemic and non-glycemic effects. Target populations, summaries of clinical studies and issues related to implantable pump therapy are highlighted...
December 2, 2016: Expert Opinion on Drug Delivery
https://www.readbyqxmd.com/read/27909513/assessment-of-sinoatrial-node-function-in-patients-with-persistent-and-long-standing-persistent-forms-of-atrial-fibrillation-after-maze-iii-procedure-combined-with-mitral-valve-operation
#6
Kulikov Aleksei A, Bokeria Leo A
RESEARCH OBJECTIVE: Assessment of sinoatrial node function after Maze III procedure combined with a mitral valve operation. METHODS: 100 patients were included in the research with persistent and long-standing persistent forms of atrial fibrillation (AF) and need of operative treatment concerning valve disease. The following preoperative preparation methods were executed to all patients: Electrocardiogram in 12 standard assignments;Two-dimensional echocardiographic with assessment of systolic and diastolic functions of the left ventricle, size of the left atrium and grade of valve disease;Transesophageal echocardiography for exclusion of blood clots in the left atrium and left atrial appendage;Coronary angiography for exclusion of coronary heart disease;Computer tomography for examination of cardiac chambers and anatomic characteristics of pulmonary veins...
June 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27904221/what-have-we-learned-from-100-success-of-press-fit-condylar-rotating-platform-posterior-stabilized-knees-a-5-10-years-followup-by-a-nondesigner
#7
Shrinand V Vaidya, Siddharth Virani, Rajendra Phunde, Abhishek Mahajan
BACKGROUND: Total joint arthroplasties of the hip and knee represent a remarkable feat of modern medicine in terms of reducing pain and restoring function to millions of patients afflicted with severe arthritis. Oftentimes, the performance and longevity of new implants and devices are based on limited data. This is the first study by a non-designer on the press fit condylar rotating platform posterior stabilized (PFC-RP-PS) design with 100' success. This has a relevance, vis-á -vis bias that one may have in terms of reproducibility of technique and funding from the manufacturer...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27902498/immediate-replacement-of-single-teeth-with-immediately-loaded-implants-retrospective-analysis-of-a-clinical-case-series
#8
Ashok Sethi, Thomas Kaus
INTRODUCTION: The purpose of this retrospective analysis of clinical data was to evaluate the predictability of replacing failing single teeth with immediately placed implants loaded via a transitional (provisional) restoration. MATERIALS AND METHODS: Implants were placed immediately at the time of extraction of failing single teeth that met predetermined inclusion criteria. A detailed protocol was followed to enable immediate loading of the implant with the use of prefabricated abutments in combination with transitional restorations...
November 29, 2016: Implant Dentistry
https://www.readbyqxmd.com/read/27898165/sinus-augmentation-and-simultaneous-implant-placement-success-pilot-study-2008-2011
#9
Melissa Tormos, Jose Morales, Natalia Guevara, Augusto R Elías, Lydia López, Omar García
OBJECTIVE: 1) To describe implant success in the posterior maxillary when a sinus augmentation procedure was performed simultaneously with implant placement and then compare differences in success when sinus augmentation was delayed in patients attending the maxillofacial surgery clinic of the University of Puerto Rico, 2008 through 2011. 2) To determine sociodemographic characteristics, ASA classification, graft material, and final restoration and, using a questionnaire, determine as well patient satisfaction...
December 2016: Puerto Rico Health Sciences Journal
https://www.readbyqxmd.com/read/27897974/delayed-coloanal-anastomosis-for-rectovaginal-fistula-after-colorectal-resection-for-deep-endometriosis
#10
Gaetano Gallo, Alberto Realis Luc, Roberta Tutino, Giuseppe Clerico, Mario Trompetto
AIM: The deep infiltrating endometriosis, defined as a subperitoneal infiltration of endometrial implants of ≥ 5 mm involving not only the colorectal tract but also rectovaginal septum, vagina and bladder often requires a challenging surgery. Endometriosis nodes of the rectovaginal septum, if symptomatic, need a resection of the involved colorectal tract with colorectal or coloanal anastomosis. Unfortunately in these cases is not uncommon the possibility of a postoperative rectovaginal fistula (RVF), caused by the weakness of the septum that must be skeletonized to completely remove the endometriosis nodes...
November 28, 2016: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/27893559/personalized-reconstruction-of-traumatic-orbital-defects-based-on-precise-three-dimensional-orientation-and-measurements-of-the-globe
#11
Li Huang, Lisong Lin, Zhihong Wang, Bin Shi, Xiaofeng Zhu, Yu Qiu, Yue Huang, Xueyuan Yu, Yunyang Liao
OBJECTIVE: The aim of the study was to precisely assess the severity of traumatic orbital defects and techniques for personalized orbital reconstruction. METHODS: A retrospective study was conducted in 97 patients with traumatic orbital defects who were treated in our hospital between July 2003 and June 2012. Pre- and postoperative spiral computed tomography scans were performed in all patients. A spatial orientation technique was used to measure the three-dimensional position of the globe and calculate the changes in the orbital volume...
November 23, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27892564/zirconia-based-dental-ceramics-structure-mechanical-properties-biocompatibility-and-applications
#12
Chandkiram Gautam, Jarin Joyner, Amarendra Gautam, Jitendra Rao, Robert Vajtai
Zirconia (ZrO2) based dental ceramics have been considered to be advantageous materials with adequate mechanical properties for the manufacturing of medical devices. Due to its very high compression strength of 2000 MPa, ZrO2 can resist differing mechanical environments. During the crack propagation on the application of stress on the surface of ZrO2, a crystalline modification diminishes the propagation of cracks. In addition, zirconia's biocompatibility has been studied in vivo, leading to the observation of no adverse response upon the insertion of ZrO2 samples into the bone or muscle...
November 28, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27886360/high-proximal-migration-in-cemented-acetabular-revisions-operated-with-bone-impaction-grafting-47-revision-cups-followed-with-rsa-for-17-years
#13
Maziar Mohaddes, Peter Herberts, Henrik Malchau, Per-Erik Johanson, Johan Kärrholm
BACKGROUND: Bone impaction grafting is a biologically and mechanically appealing option in acetabular revision surgery, allowing restitution of the bone stock and restoration of the biomechanics. We analysed differences in proximal migration of the revision acetabular components when bone impaction grafting is used together with a cemented or an uncemented cup. PATIENTS AND METHODS: 43 patients (47 hips), revised due to acetabular loosening and judged to have less than 50% host bone-implant contact were included...
November 22, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/27882697/biomechanical-properties-of-an-implanted-engineered-tubular-gut-sphincter-complex
#14
Elie Zakhem, Mostafa El Bahrawy, Giuseppe Orlando, Khalil N Bitar
Neuromuscular diseases of the gut alter the normal motility patterns. Although surgical intervention remains the standard treatment, preservation of the sphincter attached to the rest of the gut is challenging. The present study aimed to evaluate a bioengineered gut-sphincter complex following its subcutaneous implantation for 4 weeks in rats. Engineered innervated human smooth muscle sheets and innervated human sphincters with a predefined alignment were placed around tubular scaffolds to create a gut-sphincter complex...
November 23, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27882310/minimal-invasive-horizontal-ridge-augmentation-using-subperiosteal-tunneling-technique
#15
Hyun-Suk Kim, Young-Kyun Kim, Pil-Young Yun
BACKGROUND: The goal of this study was to retrospectively evaluate the prognosis of minimal invasive horizontal ridge augmentation (MIHRA) technique using small incision and subperiosteal tunneling technique. METHODS: This study targeted 25 partially edentulous patients (10 males and 15 females, mean age 48.8 ± 19.7 years) who needed bone graft for installation of the implants due to alveolar bone deficiency. The patients took the radiographic exam, panoramic and periapical view at first visit, and had implant fixture installation surgery...
December 2016: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27881315/cad-cam-implant-supported-fixed-complete-dental-prosthesis-with-titanium-milled-molars-a-clinical-report
#16
Abdulaziz AlHelal, Bader AlBader, Mathew T Kattadiyil, Antoanela Garbacea, Periklis Proussaefs
Implant-supported fixed complete dental prostheses have been associated with a high implant success rate in long-term studies. However, they have also been associated with a high frequency of prosthetic complications. The most frequent and primary prosthetic complication has been the fracture or wear of the occlusal surface of acrylic resin teeth that are typically attached to a metal framework. The design of the framework in this clinical report involved the incorporation of metal occlusal surfaces for the posterior first molars to the framework...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27881313/effect-of-internal-hexagonal-index-on-removal-torque-and-tensile-removal-force-of-different-morse-taper-connection-abutments
#17
Thalisson Saymo de Oliveira Silva, Suyá Moura Mendes Alencar, Valdimar da Silva Valente, Carmem Dolores Vilarinho Soares de Moura
STATEMENT OF PROBLEM: The maintenance of the mechanical stability of implant-abutment connections is relevant to the clinical success of implant-supported restorations. However, the reduction in the conical area of abutments with an internal hexagonal index may result in a biomechanical disadvantage in Morse taper connections. PURPOSE: The purpose of this in vitro study was to evaluate the influence of an internal hexagonal index on the removal torque and tensile removal force of different Morse taper connection abutments submitted to thermomechanical cycling...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27878769/to-what-extent-residual-alveolar-ridge-can-be-preserved-by-implant-a-systematic-review
#18
REVIEW
Ahmed Khalifa Khalifa, Masahiro Wada, Kazunori Ikebe, Yoshinobu Maeda
BACKGROUND: It has been reported that the load for (or to) implant-supported restoration may lead to bone remodeling as bone resorption and/or formation. While many authors supported the process of bone resorption, others elaborated bone apposition and increasing bone density close and remote to implant body (or fixture). This may suggest the role of the implant to reserve alveolar ridge from physiologic/pathologic resorption. The aim of this systematic review was to predict to how extend dental implants can preserve the residual alveolar ridge based on previous clinical investigations...
December 2016: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/27878333/transcatheter-pulmonary-valve-replacement-and-acute-increase-in-diastolic-pressure-are-associated-with-increases-in-both-systolic-and-diastolic-pulmonary-artery-dimensions
#19
Ryan Callahan, Lisa Bergersen, James E Lock, Audrey C Marshall
Stable positioning of a transcatheter pulmonary valve (TPV) in native outflow tracts depends on a clear understanding of underlying anatomy and outflow tract dimensions. We hypothesized that restoration of pulmonary competence may acutely alter these dimensions. A retrospective single-center review of consecutive patients after TPV placement from 2007 to 2014 was performed. Patients with less than moderate pulmonary regurgitation were excluded. We reviewed acute catheterization data on 46 patients, most with tetralogy of Fallot (70%)...
November 23, 2016: Pediatric Cardiology
https://www.readbyqxmd.com/read/27875618/implant-treatment-in-the-predoctoral-clinic-a-retrospective-database-study-of-1091-patients
#20
Soni Prasad, Christopher Hambrook, Eric Reigle, Katherine Sherman, Naveen Bansal, Arthur Hefti
PURPOSE: This retrospective study was conducted at the Marquette University School of Dentistry to (1) characterize the implant patient population in a predoctoral clinic, (2) describe the implants inserted, and (3) provide information on implant failures. MATERIALS AND METHODS: The study cohort included 1091 patients who received 1918 dental implants between 2004 and 2012, and had their implants restored by a crown or a fixed dental prosthesis. Data were collected from patient records, entered in a database, and summarized in tables and figures...
November 22, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
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