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https://www.readbyqxmd.com/read/27922962/retention-and-mechanical-behavior-of-attachment-systems-for-implant-retained-auricular-prostheses
#1
Eder Alberto Sigua-Rodriguez, Douglas Rangel Goulart, Zarina Tatia Santos, Natalia Alvarez-Pinzon, Sergio Olate, José Ricardo de Albergaria-Barbosa
OBJECTIVE: Auricular prostheses are artificial substitutes for facial defects. The retention of these has often been a problem. This study aimed to evaluate the mechanical behavior of 3 retained auricular prosthetic connections when submitted to a mechanical cycling test. MATERIALS AND METHODS: Twelve samples with installed implants were obtained and divided into 3 groups according to their retention system with 4 samples in each group. I: bar-clip system; II: magnet system; and III: ball/o-ring system...
December 5, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27919842/propagation-of-seizures-in-a-case-of-lesional-mid-cingulate-gyrus-epilepsy-studied-by-stereo-eeg
#2
Rafeed Alkawadri, Jorge Gonzalez-Martinez, Nicolas Gaspard, Andreas V Alexopoulos
Little is known about the propagation of seizures arising from the cingulate gyrus, as cingulate coverage with interhemispheric subdural electrodes is usually challenging and incomplete due to inherent anatomical and vascular limitations. We present a case of lesional mid-cingulate epilepsy confirmed by stereotactically implanted intracranial depth electrodes and subsequent surgical resection. Hypermotor symptomatology was seen during the first seven seconds of seizure onset while the seizure was still confined to the mid-cingulate gyrus contacts...
December 5, 2016: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/27915156/fracture-resistance-of-zirconia-based-implant-abutments-after-artificial-long-term-aging
#3
Abdulaziz Alsahhaf, Benedikt Christopher Spies, Kirstin Vach, Ralf-Joachim Kohal
OBJECTIVE: To investigate the survival rate, fracture strength, bending moments, loading to fracture and fracture modes of different designs of zirconia abutments after dynamic loading with thermocycling, and compare these values to titanium abutments. METHODS: A total of 80 abutment samples were divided into 5 test groups of 16 samples in each group. The study included the following groups, "Group 1" CAD/CAM produced all-zirconia abutments, "Group 2" titanium abutments, "Group 3" zirconia-abutments adhesively luted to a titanium base, "Group 4" prefabricated all-zirconia abutments and "Group 5" zirconia-abutments glass soldered to a titanium base...
November 21, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27912139/repair-of-calvarial-bone-defects-in-mice-using-electrospun-polystyrene-scaffolds-combined-with-%C3%AE-tcp-or-gold-nanoparticles
#4
Lisa Terranova, Diana Maria Dragusin, Romain Mallet, Eugeniu Vasile, Izabela-Cristina Stancu, Catherine Behets, Daniel Chappard
Non-biodegradable porous polystyrene (PS) scaffolds, composed of microfibers, have been prepared by electrospinning for the reconstruction of large bone defects. PS microfibers were prepared by incorporating β-TCP grains inside the polymer or grafting gold nanoparticles surface functionalized with mercaptosuccinic acid. Cytocompatibility of the three types of scaffolds (PS, β-TCP-PS and Au-PS) was studied by seeding human mesenchymal stem cells. Biocompatibility was evaluated by implanting β-TCP-PS and Au-PS scaffolds into a critical size (4mm) calvarial defect in mice...
November 8, 2016: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/27911244/neurosurgical-management-in-lateral-meningocele-syndrome-case-report
#5
Erik C Brown, Kunal Gupta, Christina Sayama
Lateral meningocele syndrome (LMS) is a rare genetic connective tissue disorder. It is associated with morphological changes similar to those of other connective tissue disorders, with the unique distinction of multiple, often bilateral and large, lateral meningoceles herniating through the spinal foramina. In some cases, these lateral meningoceles can cause pain and discomfort due to their presence within retroperitoneal tissues or cause direct compression of the spinal nerve root exiting the foramen; in some cases compression may also involve motor weakness...
December 2, 2016: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/27904452/virtual-modelling-of-novel-applicator-prototypes-for-cervical-cancer-brachytherapy
#6
Primoz Petric, Robert Hudej, Noora Al-Hammadi, Barbara Segedin
BACKGROUND: Standard applicators for cervical cancer Brachytherapy (BT) do not always achieve acceptable balance between target volume and normal tissue irradiation. We aimed to develop an innovative method of Target-volume Density Mapping (TDM) for modelling of novel applicator prototypes with optimal coverage characteristics. Patients and methods. Development of Contour-Analysis Tool 2 (CAT-2) software for TDM generation was the core priority of our task group. Main requests regarding software functionalities were formulated and guided the coding process...
December 1, 2016: Radiology and Oncology
https://www.readbyqxmd.com/read/27904088/the-effect-of-implant-diameter-on-strain-around-implants-retaining-a-mandibular-overdenture-with-locator-attachments-an-in-vitro-study
#7
Moustafa Abdou Elsyad, Ahmed Abdelsalam Elhddad, Ahmed Samir Khirallah
This study evaluated the effect of implant diameter on strain around implants retaining mandibular overdentures with Locator attachments. Three mandibular acrylic resin models were constructed with 2 implants inserted in canine areas and classified according to implant diameter into 3 groups: large (4.2 mm), medium (3.7 mm), and small (3.3 mm) diameter implants. Duplicate dentures were connected to the implants with Locator attachments. Four strain gauges were bonded to the acrylic resin at mesial, distal, buccal and lingual surfaces of each implant and strain was measured at loading and non-loading sides during 1st premolar and 1st molar loading...
2016: Dental Materials Journal
https://www.readbyqxmd.com/read/27903476/rapid-aneurysmal-sac-expansion-following-endovascular-repair-of-a-dissecting-thoracoabdominal-aneurysm
#8
Pau Bargay-Juan, Teresa Martin-Gonzalez, Rachel Clough, Rafaëlle Spear, Jonathan Sobocinski, Stephan Haulon
Endovascular repair of dissecting thoracoabdominal aneurysms (TAAA) is challenging and often requires multiple procedures. A 61-year-old man with a dissecting type-II TAAA treated first by placement of a thoracic endograft, and subsequently implantation of a fenestrated endograft. Six months postoperatively, a 10mm increase of the aorta was observed. A re-entry tear in left external iliac artery(EIA) was perfusing the false lumen in a retrograde fashion connecting with the endoleak caused by the inferior mesenteric artery and lumbar arteries...
November 26, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27890843/total-endovascular-aortic-repair-in-a-patient-with-marfan-syndrome
#9
Mau Amako, Rafaëlle Spear, Rachel E Clough, Adrien Hertault, Richard Azzaoui, Teresa Martin Gonzalez, Jonathan Sobocinski, Stéphan Haulon
OBJECTIVE: To describe a total endovascular aortic repair with branched and fenestrated endografts in a young patient with Marfan syndrome and a chronic aortic dissection. Open surgery is the gold standard to treat aortic dissections in patients with aortic disease and Marfan syndrome. METHODS: In 2000, a 38-year-old man with Marfan syndrome underwent open ascending aorta repair for an acute type A aortic dissection. One year later, a redo sternotomy was performed for aortic valve replacement...
November 24, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27883203/impact-of-platform-switching-on-interproximal-bone-levels-around-8-5-mm-implants-in-the-posterior-region-5-year-results-from-a-randomized-clinical-trial
#10
Gerdien Telleman, Gerry M Raghoebar, Arjan Vissink, Henny J A Meijer
AIM: To assess the medium-term results of 8.5 mm implants supplied with a conventional platform-matched implant-abutment connection or a platform-switched design. MATERIALS & METHODS: Eighty patients with 1 or more missing teeth in the maxillary or mandibular posterior zone were randomly assigned for treatment with implants with a conventional (control group) or platform-switched (test group) implant-abutment connection. Follow-up visits were conducted 1 month, 1 year and 5 years after functional loading...
November 24, 2016: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/27882311/retrospective-clinical-study-of-an-implant-with-a-sandblasted-large-grit-acid-etched-surface-and-internal-connection-analysis-of-short-term-success-rate-and-marginal-bone-loss
#11
Jae-Wang Lee, Jun Hyeong An, Sang-Hoon Park, Jong-Hyon Chong, Gwang-Seok Kim, JeongJoon Han, Seunggon Jung, Min-Suk Kook, Hee-Kyun Oh, Sun-Youl Ryu, Hong-Ju Park
BACKGROUND: The purpose of this retrospective study was to evaluate the clinical utility of an implant with a sandblasted, large-grit, acid-etched (SLA) surface and internal connection. METHODS: Six patients who received dental implants in the Department of Oral and Maxillofacial Surgery, Chonnam National University Dental Hospital, were analyzed by factors influencing the success rate and marginal bone loss. Factors included patient's age, sex, implant installation site, whether bone graft was done, type of bone graft materials, approaching method if sinus lift was done, and the size of the fixture...
December 2016: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27882310/minimal-invasive-horizontal-ridge-augmentation-using-subperiosteal-tunneling-technique
#12
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/27881327/accuracy-of-impression-scanning-compared-with-stone-casts-of-implant-impressions
#13
Ragai Edward Matta, Werner Adler, Manfred Wichmann, Siegfried Martin Heckmann
STATEMENT OF PROBLEM: Accurate virtual implant models are a necessity for the fabrication of precisely fitting superstructures. PURPOSE: The purpose of this in vitro study was to evaluate different methods with which to build an accurate virtual model of a 3-dimensional implant in the oral cavity; this model would then be used for iterative computer-aided design and computer-aided manufacturing (CAD-CAM) procedures. MATERIAL AND METHODS: A titanium master model with 3 rigidly connected implants was manufactured and digitized with a noncontact industrial scanner to obtain a virtual master model...
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
#14
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/27875227/a-stretchable-microneedle-electrode-array-for-stimulating-and-measuring-intramuscular-electromyographic-activity
#15
Gareth S Guvanasen, Liang Guo, Ricardo J Aguilar, Ashton L Cheek, Chancellor S Shafor, Swaminathan Rajaraman, T Richard Nichols, Stephen P DeWeerth
We have developed a stretchable microneedle electrode array (sMEA) to stimulate and measure the electrical activity of muscle across multiple sites. The technology provides the signal fidelity and spatial resolution of intramuscular electrodes across a large area of tissue. Our sMEA is composed of a polydimethylsiloxane (PDMS) substrate, conductive-PDMS traces, and stainless-steel penetrating electrodes. The traces and microneedles maintain a resistance of less than 10 kΩ when stretched up to a ~63% tensile strain, which allows for the full range of physiological motion of feline muscle...
November 16, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27873018/soft-tissue-augmentation-around-osseointegrated-and-uncovered-dental-implants-a-systematic-review
#16
REVIEW
Renzo G Bassetti, Alexandra Stähli, Mario A Bassetti, Anton Sculean
OBJECTIVES: The aim was to compile the current knowledge about the efficacy of different soft tissue correction methods around osseointegrated, already uncovered and/or loaded (OU/L) implants with insufficient soft tissue conditions. Procedures to increase peri-implant keratinized mucosa (KM) width and/or soft tissue volume were considered. MATERIALS AND METHODS: Screening of two databases: MEDLINE (PubMed) and EMBASE (OVID), and manual search of articles were performed...
November 21, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27869054/percutaneous-closure-of-an-aortopulmonary-window-using-amplatzer-duct-occluder-ii-additional-sizes-the-first-reported-case
#17
Roland Fiszer, Karol Zbroński, Małgorzata Szkutnik
To date, there are no reported cases of the Amplatzer Duct Occluder II: Additional Sizes' use in percutaneous closure of an aortopulmonary window. We report a case of percutaneous closure of an aortopulmonary window in a 4.5-month-old, 6 kg child. Owing to the patient's low weight, high risk of damage to the pulmonary valve, as well as the possibility of aortic and pulmonary artery obstruction, classic implants were deemed unsuitable and a decision was made to use the Amplatzer Duct Occluder II: Additional Sizes...
November 21, 2016: Cardiology in the Young
https://www.readbyqxmd.com/read/27864641/an-open-prospective-single-cohort-multicenter-study-evaluating-the-novel-tapered-conical-connection-implants-supporting-single-crowns-in-the-anterior-and-premolar-maxilla-interim-1-year-results
#18
Alexander Fügl, Werner Zechner, Alessandro Pozzi, Guido Heydecke, Christine Mirzakhanian, Nikolaus Behneke, Alexandra Behneke, Russell A Baer, Robert Nölken, Edward Gottesman, Snjezana Colic
OBJECTIVES: The aim of this multicenter prospective clinical study was to evaluate anodized tapered implants with a conical connection and integrated platform shifting placed in the anterior and premolar maxilla. MATERIALS AND METHODS: The study enrolled patients requiring single-tooth restorations in healed sites of maxillary anterior and premolar teeth. All implants were immediately temporized. Clinical and radiographic evaluations were conducted at implant insertion, 6 months, and 1 year...
November 18, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27861672/a-two-year-evaluation-of-a-sloped-marginal-contour-implant-system-placed-in-healed-sites
#19
Philip Km Lee, Adam Sc Siu
PURPOSE: The purpose of this clinical trial was to evaluate the survival rate, bone remodeling, and soft tissue health around sloped marginal contour implants when placed in healed sites posteriorly in the mouth. MATERIALS AND METHODS: Implants were placed in healed sites at premolar and molar regions. After a 3-month osseointegration period, definitive prostheses were connected. Clinical and radiographic examinations were performed at implant placement and then 1, 3, 6, 12, and 24 months after implant placement...
November 2016: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/27861666/internal-vs-external-connection-single-implants-a-retrospective-study-in-an-italian-population-treated-by-certified-prosthodontists
#20
Paolo Vigolo, Stefano Gracis, Fabio Carboncini, Sabrina Mutinelli
PURPOSE: The design of an implant connection that allows prosthetic suprastructures to be attached to implants has long been debated in the dental literature. The goal of this retrospective study was to evaluate the 5-year clinical results for a large number of single implants restored by certified prosthodontists in an attempt to establish whether different clinical outcomes could be detected for external- or internal-connection implants. MATERIALS AND METHODS: All single implants with internal or external connections inserted in 27 private dental practices from January 1, 2003 to December 31, 2007 were evaluated...
November 2016: International Journal of Oral & Maxillofacial Implants
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