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https://www.readbyqxmd.com/read/29225649/incidence-of-dentinal-defects-and-vertical-root-fractures-after-endodontic-retreatment-and-mechanical-cycling
#1
Mariana De Carlo Bello, Rafael Pillar, Pauline Mastella Lang, Carina Michelon, Ricardo Abreu da Rosa, Carlos Alexandre Souza Bier
Introduction: The aim of this study was to evaluate the incidence of dentinal defects and vertical root fractures (VRFs) after endodontic retreatment and mechanical cycling (MC). Methods and Materials: Two hundred mandibular premolars were selected. Forty teeth were left unprepared (control group). The remaining 160 root canals were prepared with ProTaper instruments and filled by using two different techniques [eighty with lateral compaction (LC) and eighty with single-cone (SC)]...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29225358/effect-of-margin-designs-on-the-marginal-adaptation-of-zirconia-copings
#2
Syed Rashid Habib, Mohammed Ginan Al Ajmi, Mohammed Al Dhafyan, Abdulrehman Jomah, Haytham Abualsaud, Mazen Almashali
Objective: The aim of this in vitro study was to investigate the effect of Shoulder versus Chamfer margin design on the marginal adaptation of zirconia (Zr) copings. Materials and Methods: 40 extracted molar teeth were mounted in resin and prepared for zirconia crowns with two margin preparation designs (20=Shoulder and 20=Chamfer). The copings were manufactured by Cercon® (DeguDent GmbH, Germany) using the CAD/CAM system for each tooth. They were tried on each tooth, cemented, thermocycled, re-embedded in resin and were subsequently cross sectioned centrally into two equal mesial and distal halves...
September 2017: Acta Stomatologica Croatica
https://www.readbyqxmd.com/read/29224027/a-clinical-scoring-system-for-diagnosis-of-ocular-demodicosis
#3
Oktay Alver, Sertaç Argun Kıvanç, Berna Akova Budak, Nazmiye Ülkü Tüzemen, Beyza Ener, Ahmet Tuncer Özmen
BACKGROUND Demodex may cause chronic and refractory blepharitis with associated ocular surface problems, and its diagnosis and treatment can be quite challenging. In this study, our aim was to assess the efficacy of tea tree oil in Demodex treatment on caucasian patients in an industrialized region of Turkey, and to develop a systematic scoring system for extremely accurate diagnosis in the absence of advanced facilities. MATERIAL AND METHODS Charts of 412 patients with blepharitis were reviewed. A group of 39 out of 412 cases were identified as chronic and treatment-refractory, and therefore were enrolled in this study...
December 10, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29223703/the-foreign-body-response-and-morphometric-changes-associated-with-mesh-style-peripheral-nerve-cuffs
#4
Michael B Christensen, Patrick A Tresco
Nerve cuffs have been used to anchor and protect penetrating electrodes in peripheral nerves and have been used as non-penetrating electrodes for neural recording and nerve stimulation. The material of choice for such applications is silicone, an inert synthetic biomaterial which elicits a minimal chronic foreign body response (FBR). While histological studies of solid silicone cuffs are available, to the best of our knowledge a comparison to other cuff designs is not well documented. Here, we describe the FBR and morphological changes that accompany nerve cuff implantation in the rat sciatic nerve by comparing a metallic mesh with and without a parylene coating to one made of silicone...
December 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29223074/bioaccumulation-and-trophic-transfer-of-cyclic-volatile-methylsiloxanes-cvms-in-the-aquatic-marine-food-webs-of-the-oslofjord-norway
#5
David E Powell, Merete Schøyen, Sigurd Øxnevad, Reinhard Gerhards, Thomas Böhmer, Martin Koerner, Jeremy Durham, Darren W Huff
The trophic transfer of cyclic methylsiloxanes (cVMS) in aquatic ecosystems is an important criterion for assessing bioaccumulation and ecological risk. Bioaccumulation and trophic transfer of cVMS, specifically octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), and dodecamethylcyclohexasiloxane (D6), were evaluated for the marine food webs of the Inner and Outer Oslofjord, Norway. The sampled food webs included zooplankton, benthic macroinvertebrates, shellfish, and finfish species. Zooplankton, benthic macroinvertebrates, and shellfish occupied the lowest trophic levels (TL ≈2 to 3); northern shrimp (Pandalus borealis) and Atlantic herring (Clupea harengus) occupied the middle trophic levels (TL ≈3 to 4), and Atlantic cod (Gadus morhua) occupied the highest tropic level (TL>4...
December 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29218321/visual-assessment-of-colorectal-flat-and-depressed-lesions-by-using-narrow-band-imaging
#6
Hiroshi Nakamura, Hiroaki Ikematsu, Shozo Osera, Renma Ito, Daiki Sato, Tatsunori Minamide, Naoki Okamoto, Yoichi Yamamoto, Takuya Hombu, Kenji Takashima, Keiichiro Nakajo, Tomohiro Kadota, Yusuke Yoda, Keisuke Hori, Yasuhiro Oono, Tomonori Yano
Background and study aims:  Visual assessment of laterally spreading tumors non-granular type (LST-NG) and depressed lesions by narrow band imaging (NBI) without magnification has not been studied. We investigated the role of non-magnifying NBI in detecting LST-NG and type IIc lesions on colonoscopy. Patients and methods:  This retrospective study examined consecutive patients diagnosed as having LST-NG and/or type IIc lesions in our hospital between August 2011 and July 2013...
December 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/29218070/radiographic-evaluation-of-alignment-following-tka-a-systematic-review
#7
Serban Dragosloveanu, Bogdan Cretu, Stefan Cristea, Cristian Stoica, Calin Dragosloveanu
Postoperative assessment is of paramount importance in primary total knee arthroplasty. A thorough postoperative analysis helps the surgeon anticipate any postoperative potential issues and correlate the preoperative planning with the postoperative result, and provides better understanding of the importance of surgical principles of primary total knee arthroplasty. In addition, postoperative analysis helps the surgeon understand surgical errors and improve future outcomes. Standard radiographs, with a known magnification, should be obtained for postoperative total knee arthroplasty evaluation...
September 2017: Mædica
https://www.readbyqxmd.com/read/29217456/goblet-cell-density-estimate-differences-in-impression-cytology-samples-varies-with-different-magnification-of-images
#8
Michael J Doughty
PURPOSE: To assess the impact of using different microscope magnifications for the goblet cell density (GCD) estimates from conjunctival impression cytology (CIC) samples from healthy individuals METHODS: In a prospective study, CIC specimens were collected from the superior bulbar conjunctiva (12 o'clock, 5mm from limbus) of 20 adult subjects (average age 22 years) onto Millicell-CM membranes and Giemsa stained. A region from each CIC filter containing reasonably high numbers of goblet cells was imaged by light microscopy at a final magnification of 400X and then the same region assessed at 200X and then 100X...
December 4, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29215445/detailed-anatomy-of-osteoperiosteal-ligamentous-structures-in-the-forehead
#9
Jong Pil Choi, Hyun Gu Kang, Yong Seok Nam, In-Beom Kim
This study aimed to present the anatomic characteristics of osteoperiosteal ligamentous attachments of the forehead and provide a better understanding of lateral eyebrow descent for safe and effective foreheadplasty. Anatomic dissections of the face were performed in 10 fresh Korean adult cadavers (20 hemifaces) using 2.5× magnification surgical loupes. Supraorbital, inferomedial orbital, and frontonasal osteoperiosteal ligamentous attachments were identified as fibrous tissues originating from a bone, and their tensile strengths were measured...
December 6, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29210900/development-of-image-enhanced-endoscopy-of-the-gastrointestinal-tract-a-review-of-history-and-current-evidences
#10
Shiaw-Hooi Ho, Noriya Uedo, Akira Aso, Shuji Shimizu, Yutaka Saito, Kenshi Yao, Khean-Lee Goh
Endoscopy imaging of the gastrointestinal (GI) tract has evolved tremendously over the last few decades. Key milestones in the development of endoscopy imaging include the use of various dyes for chromoendoscopy, the application of optical magnification in endoscopy, the introduction of high-definition image capturing and display technology and the application of altered illuminating light to achieve vascular and surface enhancement. Aims of this review paper are to summarize the development and evolution of modern endoscopy imaging and in particular, imaged-enhanced endoscopy (IEE), to promote appropriate usage, and to guide future development of good endoscopy practice...
November 28, 2017: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/29208400/influence-of-cervical-preflaring-on-the-incidence-of-root-dentin-defects
#11
Álvaro Henrique Borges, Monique Sobral Damião, Thiago Machado Pereira, Gilberto Siebert Filho, Fabio Luis Miranda-Pedro, Welligton Luiz de Oliveira da Rosa, Evandro Piva, Orlando Aguirre Guedes
INTRODUCTION: This study evaluated the influence of cervical preflaring on the incidence of root dentin defects after root canal preparation. METHODS: Extracted human maxillary central incisors were selected and allocated to 1 control group and 12 experimental groups (n = 15). Teeth in the control group were left unprepared, whereas the others were prepared using 2 reciprocating single-file systems (Reciproc and WaveOne [WO]), 3 full-sequence rotary systems (ProTaper Universal, ProTaper Next [PTN], and ProFile), and K-files driven by an oscillatory system, with and without cervical preflaring...
December 2, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29208311/bonding-strategies-for-mih-affected-enamel-and-dentin
#12
Norbert Krämer, Ngoc-Han Nana Bui Khac, Susanne Lücker, Vitus Stachniss, Roland Frankenberger
OBJECTIVES: Aim of the present study was to evaluate resin composite adhesion to dental hard tissues affected by molar incisor hypomineralisation (MIH). METHODS: 94 freshly extracted human molars and incisors (53 suffering MIH) were used. 68 teeth (35 with MIH) were used for μ-TBS tests in enamel and dentin, 26 (18 with MIH) for qualitative evaluation. Specimens were bonded with Clearfil SE Bond, Scotchbond Universal, and OptiBond FL. For MIH affected enamel, additional OptiBond FL groups with NaOCl and NaOCl+Icon were investigated...
December 2, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29199047/egg-laying-behavior-and-morphological-and-chemical-characterization-of-egg-surface-and-egg-attachment-glue-of-the-digger-wasp-ampulex-compressa-hymenoptera-ampulicidae
#13
Werner Gnatzy, Walter Volknandt, Anja Dzwoneck
For providing their offspring females of the digger wasp species Ampulex compressa hunt cockroaches paralyze them and attach as a rule one egg to the coxa of one of the mid legs of their prey. We observed the egg-laying behavior and examined with light- and scanning microscopy (i) nearly mature eggs from ovaries of freshly dissected females and (ii) eggs immediately after their deposition on the coxae of their prey. The length of the white bean-shaped eggs varied between 2.2 and 3.0 mm, their diameter between 0...
November 30, 2017: Arthropod Structure & Development
https://www.readbyqxmd.com/read/29198352/editorial-commentary-the-wake-of-the-dragon-will-the-orthopaedic-community-adopt-the-shoulder-arthroscopic-latarjet-procedure-as-we-adopted-the-arthroscopic-rotator-cuff-repair
#14
EDITORIAL
Pascal Boileau, David Saliken
The Latarjet procedure is a complex and difficult operation when performed both with an open approach and arthroscopically. The difficulties come from the fact that it is a combined intra- and extra-articular procedure, and that working close to the brachial plexus may be frightening for surgeons. Because of the high complication and reoperation rates reported in the literature, this procedure is, at the moment, rejected by a large part of the orthopaedic community, specifically in North America. The Chinese experience shows, after the European one, that arthroscopic Latarjet is an efficient and irreplaceable option for the treatment of recurrent anterior shoulder instability in the context of capsular and/or glenoid deficiency...
December 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29194924/microleakage-around-zirconia-crown-margins-after-ultrasonic-scaling-with-self-adhesive-resin-or-resin-modified-glass-ionomer-cement
#15
Bright Chang, Ronald Goldstein, Chee Paul Lin, Sudha Byreddy, Nathaniel C Lawson
OBJECTIVES: To measure microleakage around zirconia crown margins cemented with self-adhesive resin or resin modified glass ionomer (RMGI) cement after ultrasonic scaling. METHODS: 16 molars were prepared for crowns (margin 0.5 mm coronal of cementum-enamel junction). Preparations were digitally scanned and zirconia crowns milled. Specimens were divided into two groups (n = 8): self-adhesive resin (RelyX Unicem 2) or resin modified glass ionomer (RMGI) (RelyX Luting Plus) cements...
December 1, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29194841/marginal-and-internal-fit-of-cad-cam-crowns-fabricated-over-reverse-tapered-preparations
#16
Jeison B Carbajal Mejía, Hirofumi Yatani, Kazumichi Wakabayashi, Takashi Nakamura
PURPOSE: Intraoral digital scanning can accurately record single abutment tooth preparations despite their geometry, and the algorithms of the CAD software can be set to manage different abutment forms. The purpose of this in vitro study was to evaluate the marginal and internal fit of CAD/CAM zirconia crowns fabricated over conventional and reverse-tapered preparations. MATERIALS AND METHODS: Crown preparations with known total occlusal convergence (TOC) angles (-8°, -4°, 0°, 8°, 12°, 16°, and 22°) were digitally created from a maxillary left central incisor and printed in acrylic resin...
November 30, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29190787/magnification-of-digital-hip-radiographs-differs-between-clinical-workplaces
#17
Jana Hornová, Pavel Růžička, Maroš Hrubina, Eduard Šťastný, Andrea Košková, Petr Fulín, Jiří Gallo, Matej Daniel
Preoperative planning for total hip arthroplasty includes templating on anteroposterior radiographs. It is necessary to consider radiographic magnification in order to scale templates accurately. Studies dealing with hip templating report different values of radiographic magnification. It is not clear if the observed difference in magnification between the studies is caused by variability in studied groups, methodology or instrumentation. We hypothesize that there is a difference in magnification between clinical workplaces...
2017: PloS One
https://www.readbyqxmd.com/read/29186741/-french-comment-on-article-systematic-assessment-with-i-scan-magnification-endoscopy-and-acetic-acid-improves-dysplasia-detection-in-patients-with-barrett-s-esophagus
#18
(no author information available yet)
No abstract text is available yet for this article.
December 2017: Endoscopy
https://www.readbyqxmd.com/read/29182648/the-neural-response-properties-and-cortical-organization-of-a-rapidly-adapting-muscle-sensory-group-response-that-overlaps-with-the-frequencies-that-elicit-the-kinesthetic-illusion
#19
Paul D Marasco, Dennis J Bourbeau, Courtney E Shell, Rafael Granja-Vazquez, Jason G Ina
Kinesthesia is the sense of limb movement. It is fundamental to efficient motor control, yet its neurophysiological components remain poorly understood. The contributions of primary muscle spindles and cutaneous afferents to the kinesthetic sense have been well studied; however, potential contributions from muscle sensory group responses that are different than the muscle spindles have not been ruled out. Electrophysiological recordings in peripheral nerves and brains of male Sprague Dawley rats with a degloved forelimb preparation provide evidence of a rapidly adapting muscle sensory group response that overlaps with vibratory inputs known to generate illusionary perceptions of limb movement in humans (kinesthetic illusion)...
2017: PloS One
https://www.readbyqxmd.com/read/29180251/renal-cell-carcinoma-with-angioleiomyoma-like-stroma-and-clear-cell-papillary-renal-cell-carcinoma-exploring-sdhb-protein-immunohistochemistry-and-the-relationship-to-tuberous-sclerosis-complex
#20
Sean R Williamson, Jason L Hornick, John N Eble, Nilesh S Gupta, Craig G Rogers, Lawrence True, David J Grignon, Liang Cheng
Renal cell carcinoma (RCC) with angioleiomyoma-like stroma appears to be molecularly distinct from clear cell RCC; however, its relationship to clear cell papillary RCC remains debated. Recent studies have found that similar tumors sometimes occur in patients with tuberous sclerosis complex (TSC), of which one study found unexpectedly negative succinate dehydrogenase (SDH) B immunostaining. We evaluated immunohistochemistry for SDHB in 12 apparently sporadic RCCs with angioleiomyoma-like stroma and correlated with clinical information for stigmata of TSC...
November 24, 2017: Human Pathology
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