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https://www.readbyqxmd.com/read/28207461/using-dental-implants-concomitant-with-onlay-bone-grafting-for-auricular-reconstruction
#1
Amin Rahpeyma, Saeedeh Khajehahmadi
Conventional dental implants have been reported for nasal and orbital regions but due to limited thickness of calvarium they are not used in mastoid region. Onlay bone grafting in skull concomitant with implants is a predictable method and experimental animal studies confirm it. Parietal bone and lateral mandibular ramus are suggested source of bone grafts and dental implants with 7 mm length can be used safely. Increased fixture length may lead to increase survival in long term.
February 15, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28190576/field-portable-xrf-reveals-the-ubiquity-of-antimony-in-plastic-consumer-products
#2
Andrew Turner, Montserrat Filella
Very little systematic information exists on the occurrence and concentrations of antimony (Sb) in consumer products. In this study, a Niton XL3t field-portable-X-ray fluorescence (FP-XRF) spectrometer was deployed in situ and in the laboratory to provide quantitative information on Sb dissipated in plastic items and fixtures (including rubber, textile and foamed materials) from the domestic, school, vehicular and office settings. The metalloid was detected in 18% of over 800 measurements performed, with concentrations ranging from about 60 to 60,000μgg(-1)...
February 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28147636/three-point-bending-setup-for-piezoresistive-gauge-factor-measurement-of-thin-film-samples-at-high-temperatures
#3
Nis Dam Madsen, Jakob Kjelstrup-Hansen
We present a new method for measuring the piezoresistive gauge factor of a thin-film resistor based on three-point bending. A ceramic fixture has been designed and manufactured to fit a state-of-the-art mechanical testing apparatus (TA Instruments Q800). The method has been developed to test thin-film samples deposited on silicon substrates with an insulating layer of SiO2. The electrical connections to the resistor are achieved through contacts in the support points. This insures that the influence of the electrical contacts is reduced to a minimum and eliminates wire-bonding or connectors attached to the sample...
January 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28114242/effect-of-ratio-of-residual-alveolar-bone-to-graft-material-in-contact-with-fixture-surface-on-marginal-bone-loss-of-implants-in-augmented-maxillary-sinuses-a-1-year-retrospective-study
#4
Chan-Ho Park, Dong-Won Lee, Jeong-Ho Yun, Ik-Sang Moon
PURPOSE: The purpose of this retrospective study was to evaluate the influences of height or area ratio of residual alveolar bone to graft material on marginal bone loss around implants in the augmented maxillary sinuses with delayed implant placement. MATERIALS AND METHODS: In this study, 42 patients with Astra implants in sinuses that had been augmented with alloplasts and allografts or xenografts (alveolar bone height ≤ 5 mm) were selected. Marginal bone level surrounding 1 implant per sinus was assessed by radiographic imaging at the time of final restoration delivery and 12 months after functional loading...
February 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28113225/system-integration-and-in-vivo-testing-of-a-robot-for-ultrasound-guidance-and-monitoring-during-radiotherapy
#5
Hasan Sen, Muyinatu Lediju Bell, Yin Zhang, Kai Ding, Emad Boctor, John Wong, Iulian Iordachita, Peter Kazanzides
We are developing a cooperatively-controlled robot system for image-guided radiation therapy (IGRT) in which a clinician and robot share control of a 3D ultrasound (US) probe. IGRT involves two main steps: (1) planning/ simulation and (2) treatment delivery. The goals of the system are to provide guidance for patient setup and realtime target monitoring during fractionated radiotherapy of soft tissue targets, especially in the upper abdomen. To compensate for soft tissue deformations created by the probe, we present a novel workflow where the robot holds the US probe on the patient during acquisition of the planning computerized tomography (CT) image, thereby ensuring that planning is performed on the deformed tissue...
October 3, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28101497/the-factors-that-influence-postoperative-stability-of-the-dental-implants-in-posterior-edentulous-maxilla
#6
Yun-Ho Kim, Na-Rae Choi, Yong-Deok Kim
BACKGROUND: All clinicians are aware of the difficulty of installing a dental implant in posterior maxilla because of proximate position of maxillary sinus, insufficient bone width, and lower bone density. This study is to examine which factors will make the implantation in the posterior maxilla more difficult, and which factors will affect the postoperative implant stability in this region. METHODS: Five hundred seventy-three fixtures on the maxilla posterior were included for this study from all the patients who underwent an installation of the dental implant fixture from January 2010 to December 2014 at the Department of Oral and Maxillofacial Surgery in Pusan National University Dental Hospital (Yangsan, Korea)...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28095076/impaired-player-coach-perceptions-of-exertion-and-recovery-during-match-congestion
#7
Steven H Doeven, Michel S Brink, Wouter G P Frencken, Koen A P M Lemmink
: During intensified phases of competition, attunement of exertion and recovery is crucial to maintain performance. Although a mismatch between coach' and players' perceptions of training load is demonstrated, it is unknown if these discrepancies also exist for match exertion and recovery. PURPOSE: The aims of this study are to determine match exertion, subsequent recovery and to investigate to what extent the coach is able to estimate players' match exertion and recovery...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28095070/player-responses-to-match-and-training-demands-during-an-intensified-fixture-schedule-in-professional-rugby-league-a-case-study
#8
Craig Twist, Jamie Highton, Matthew Daniels, Nathan Mill, Graeme Close
Player loads and fatigue responses were reported in 15 professional rugby league players (24.3 ± 3.8 y) during a period of intensified fixtures. Repeated measures of internal and external loads, perceived wellbeing and jump flight time were recorded across 22 days, comprising nine training sessions and matches on days 5, 12, 15 and 21 (player exposure: 3.6 ± 0.6 matches). Mean training load (session RPE x duration) between matches was 1177, 1083, 103, and 650 AU, respectively. Relative distance in Match 1 (82 m/min) and Match 4 (79 m/min) was very likely lower in Match 2 (76 m/min) and likely higher in Match 3 (86 m/min)...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28079679/influence-of-behavior-on-complications-of-osseointegrated-bone-conduction-devices-in-children
#9
Michael E Kubala, Matthew D Cox, Kurt L Nelson, Gresham T Richter, John L Dornhoffer
OBJECTIVE: Compare incidences of complications following implantation of osseointegrated bone conduction devices (OBCD) between children with and without behavioral disorders. STUDY DESIGN: Case series with chart review. SETTING: Tertiary referral center otology and neurotology practice. PATIENTS: Pediatric patients who underwent implantation of OBCD between May 2009 and July 2014 at Arkansas Children's Hospital. INTERVENTIONS: Implantation with Cochlear BAHA 200 series, Cochlear BAHA BI300, or Oticon OBCD...
January 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28062612/cardiac-troponin-assays-guide-to-understanding-analytical-characteristics-and-their-impact-on-clinical-care
#10
REVIEW
Fred S Apple, Yader Sandoval, Allan S Jaffe, Jordi Ordonez-Llanos
BACKGROUND: Cardiac troponin I (cTnI) and cardiac troponin T (cTnT) determinations are fixtures in clinical practice and research. Cardiac troponin testing has been the standard of practice for the diagnosis of acute myocardial infarction (AMI), early rule-out, risk stratification, and outcomes assessment in patients presenting with acute coronary syndrome (ACS) and non-ACS myocardial injury. We recognize from reading the literature over the past several years how poorly understood the analytical characteristics are for cTnI and cTnT assays by laboratorians, clinicians, and scientists who use these assays...
January 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28053904/comparative-study-on-the-osseointegration-of-implants-in-dog-mandibles-according-to-the-implant-surface-treatment
#11
Wook-Jae Yoon, Su-Gwan Kim, Ji-Su Oh, Jae-Seek You, Kyung-In Jeong, Sung-Chul Lim, Mi-Ae Jeong
OBJECTIVES: This study compared the impact of implant surface treatment on the stability and osseointegration of implants in dog mandibles. MATERIALS AND METHODS: Six adult dogs received a total of 48 implants that were prepared using four different surface treatments; resorbable blast media (RBM), hydroxyapatite (HA), hydrothermal-treated HA, and sand blasting and acid etching (SLA). Implants were installed, and dogs were separated into 2- and 4-week groups. Implant stability was evaluated via Periotest M, Osstell Mentor, and removal torque analyzers...
December 2016: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/28048965/the-developing-stability-of-posterior-mandibular-implants-associated-with-bone-expansion-and-conventional-drilling-techniques
#12
Yen Ting Lin, Adrienne Hong, Ying Chin Peng, Hsiang Hsi Hong
Clinical decisions regarding the stability and osseointegration of mandibular implants positioned using the bone expansion techniques are conflicting and limited. The objective was to evaluate the stability of implants placed using two surgical techniques, selected according to the initial width of the mandibular posterior edentulous ridge, with D3 bone density, during a 12-week period. Fifty-eight implants in 33 patients were evaluated. Thirty-two implants in 24 patients were positioned using the osteotome expansion technique, and twenty-six fixtures in 17 patients were installed using the conventional drilling technique...
January 3, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28048083/su-f-t-08-brachytherapy-film-dosimetry-in-a-water-phantom-for-a-ring-and-tandem-hdr-applicator
#13
B Lee, Z Grelewicz, Z Kang, D Cutright, M Gopalakrishnan, V Sathiaseelan, H Zhang
PURPOSE: The feasibility of dose measurement using new generation EBT3 film was explored in a water phantom for a ring and tandem HDR applicator for measurements tracking mucosal dose during cervical brachytherapy. METHODS: An experimental fixture was assembled to position the applicator in a water phantom. Prior to measurement, calibration curves for EBT3 film in water and in solidwater were verified. EBT3 film was placed at different known locations around the applicator in the water tank...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28042450/removal-torque-evaluation-of-three-different-abutment-screws-for-single-implant-restorations-after-mechanical-cyclic-loading
#14
T Paepoemsin, P A Reichart, P Chaijareenont, F P Strietzel, P Khongkhunthian
PURPOSE: The aim of this study was to evaluate the removal torque of three different abutment screws and pull out strength of implant-abutment connection for single implant restorations after mechanical cyclic loading. METHODS: The study was performed in accordance with ISO 14801:2007. Three implant groups (n=15) were used: group A, PW Plus® with flat head screw; group B, PW Plus® with tapered screw; and group C, Conelog® with flat head screw. All groups had the same implant-abutment connection feature: cone with mandatory index...
October 2016: Oral & Implantology
https://www.readbyqxmd.com/read/28042445/guided-bone-regeneration-via-a-preformed-titanium-foil-clinical-histological-and-histomorphometric-outcome-of-a-case-series
#15
M Andreasi Bassi, C Andrisani, S Lico, Z Ormanier, L Ottria, M Gargari
PURPOSE: The aim of this paper was to evaluate the histological and histomorphometric outcome of Preformed Titanium Foil (PTF) to perform Guided Bone Regeneration (GBR) in posterior mandibular atrophies. MATERIALS AND METHODS: 10 subjects (1 male; 9 females; mean age 58±11.37 years), with distal mandibular atrophies were selected to perform GBR by means of PTF, using a moldable allograft paste as graft material. The devices, made of a 0,2 mm thick pure titanium foil, were pre-shaped using stereolithographic models obtained from CT-scan of the patients' recipient site...
October 2016: Oral & Implantology
https://www.readbyqxmd.com/read/28042432/upper-full-arch-rehabilitation-with-sinus-by-pass-with-tilted-implants-via-tapered-threaded-expanders-in-low-density-bone-a-clinical-trial
#16
M Andreasi Bassi, C Andrisani, S Lico, Z Ormanier, C Arcuri
PURPOSE: In the present paper the use of tapered-screw bone expanders (TSBEs) is proposed, in combination with the placement of tilted implants, in close proximity to the anterior sinus wall, solving the problem of the reduced height of the alveolar bone in the sub-antral area. The Authors present a case series of full-arch rehabilitations performed with this procedure named: Tilted Implant Expansion Osteotomy (TIEO). MATERIALS AND METHODS: 12 patients (5 males and 7 females, average age 58...
April 2016: Oral & Implantology
https://www.readbyqxmd.com/read/28018564/evaluation-of-stability-of-interface-between-ccm-co-cr-mo-ucla-abutment-and-external-hex-implant
#17
Ki-Joon Yoon, Young-Bum Park, Hyunmin Choi, Youngsung Cho, Jae-Hoon Lee, Keun-Woo Lee
PURPOSE: The purpose of this study is to evaluate the stability of interface between Co-Cr-Mo (CCM) UCLA abutment and external hex implant. MATERIALS AND METHODS: Sixteen external hex implant fixtures were assigned to two groups (CCM and Gold group) and were embedded in molds using clear acrylic resin. Screw-retained prostheses were constructed using CCM UCLA abutment and Gold UCLA abutment. The external implant fixture and screw-retained prostheses were connected using abutment screws...
December 2016: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28018003/refuge-alternatives-relief-valve-testing-and-design
#18
T J Lutz, P T Bissert, G T Homce, J A Yonkey
The U.S. National Institute for Occupational Safety and Health (NIOSH) has been researching refuge alternatives (RAs) since 2007. RAs typically have built-in pressure relief valves (PRVs) to prevent the unit from reaching unsafe pressures. The U.S. Mine Safety and Health Administration requires that these valves vent the chamber at a maximum pressure of 1.25 kPa (0.18 psi, 5.0 in. H2O), or as specified by the manufacturer, above mine atmospheric pressure in the RA. To facilitate PRV testing, an instrumented benchtop test fixture was developed using an off-the-shelf centrifugal blower and ductwork...
October 2016: Mining Engineering
https://www.readbyqxmd.com/read/27995901/human-in-the-loop-active-electrosense
#19
Sandra Fang, Michael Peshkin, Malcolm A MacIver
Active electrosense is a non-visual, short range sensing system used by weakly electric fish, enabling such fish to locate and identify objects in total darkness. Here we report initial findings from the use of active electrosense for object localization during underwater teleoperation with a virtual reality (VR) head-mounted display (HMD). The advantage of electrolocating with a VR system is that it naturally allows for aspects of the task that are difficult for a person to perform to be allocated to the computer...
December 20, 2016: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/27909818/presto-lift-a-facelift-that-preserves-the-retaining-ligaments-and-smas-tethering
#20
Wolfgang Funk
BACKGROUND: Producing youthful facial appearance by face-lifting often comes along with an undesired loss of patient's individual phenotype. This may result from insufficient preservation of retaining ligaments, the "guardians of facial identify," and from severance of the intersegmental connections of the superficial musculo-aponeurotic system (SMAS), which tether, structure, and compartmentalize facial soft tissue into defined, relevant anatomical zones. METHODS: The technique reported here preserves most retaining ligaments...
December 2, 2016: Oral and Maxillofacial Surgery
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