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https://www.readbyqxmd.com/read/28528378/trabeculotomy-opening-size-and-iop-reduction-after-trabectome%C3%A2-surgery
#1
Thomas Wecker, Alexandra Anton, Matthias Neuburger, Jens F Jordan, Christian van Oterendorp
BACKGROUND: Trabeculotomy with the Trabectome® is an effective surgical procedure to lower intraocular pressure (IOP). However, in some patients it does not lead to a significant IOP reduction despite a gonioscopically well visible opening of Schlemm's canal. This study investigated whether the size of the trabeculotomy opening and other parameters, including anterior chamber depth (ACD) are related to IOP reduction. METHODS: Retrospective observational case series with 93 eyes of 93 patients who underwent Trabectome surgery...
May 20, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28527961/major-aortopulmonary-collateral-arteries-with-anatomy-other-than-pulmonary-atresia-ventricular-septal-defect
#2
William L Patrick, Richard D Mainwaring, Olaf Reinhartz, Rajesh Punn, Theresa Tacy, Frank L Hanley
BACKGROUND: Major aortopulmonary collateral arteries (MAPCAs) are frequently found in association with pulmonary atresia with ventricular septal defect (PA/VSD). However, some patients with MAPCAs do not have PA/VSD but have a variety of other "atypical" anatomic diagnoses. METHODS: This was a retrospective review of patients with MAPCAs and atypical anatomy. The 50 patients with MAPCAs could be divided into two subgroups: (1) single ventricle anatomy (n = 33) and (2) two ventricle anatomy (n = 17)...
May 17, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28527852/cyclic-and-torsional-fatigue-resistance-of-reciprocating-single-files-manufactured-by-different-nickel-titanium-alloys
#3
Murilo P Alcalde, Mario Tanomaru-Filho, Clovis M Bramante, Marco Antonio H Duarte, Juliane Maria Guerreiro-Tanomaru, Jader Camilo-Pinto, Marcus Vinicius Reis Só, Rodrigo Ricci Vivan
INTRODUCTION: The aim of this study was to evaluate the cyclic and torsional fatigue resistance of the following reciprocating single-file systems: ProDesign R 25.06 (Easy Equipamentos Odontológicos, Belo Horizonte, Brazil), Reciproc R25 (VDW GmbH, Munich, Germany), and Unicone L25 (Medin SA, Nové Město in Moravě, Czech Republic). METHODS: Sixty instruments of the ProDesign R, Reciproc R25, and Unicone L25 systems (n = 20) were used. Cyclic fatigue resistance was tested measuring the time to failure in an artificial stainless steel canal with a 60° angle and a 5-mm radius of curvature (n = 10)...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527851/intentional-replantation-of-an-avulsed-immature-permanent-incisor-a-case-report
#4
Claudio Maniglia-Ferreira, Fabio de Almeida Gomes, Marcelo de Morais Vitoriano
This case report discusses the successful endodontic treatment of an open apex maxillary right permanent central incisor that had been avulsed and incorrectly replanted in a 7-year-old patient. The tooth was carefully re-extracted followed by cleaning of the alveolar socket and immediate replantation. However, pulp necrosis was diagnosed, and regenerative endodontic treatment was performed. The root canal system was disinfected by passive ultrasonic irrigation with 2.5% sodium hypochlorite. At the first visit, the tooth was repositioned and immobilized with an appropriate semirigid splint...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527848/combined-therapy-for-a-rare-case-of-type-iii-dens-invaginatus-in-a-mandibular-central-incisor-with-a-periapical-lesion-a-case-report
#5
Ping Zhang, Xin Wei
Type III dens invaginatus has a complex root canal structure that poses a greater challenge when endodontic treatment is necessary. Type III dens invaginatus rarely affects mandibular central incisors. In this case, we reported a combined therapy of type III dens invaginatus in a mandibular central incisor with a periapical lesion. Cone-beam computed tomographic (CBCT) imaging was used in the diagnosis and management of the unusual anatomy of dens invaginatus. First, the hard tissue of the dens invaginatus was removed using a dental operating microscope...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527845/cyclic-fatigue-resistance-of-oneshape-hyflex-edm-waveone-gold-and-reciproc-blue-nickel-titanium-instruments
#6
Mustafa Gündoğar, Taha Özyürek
INTRODUCTION: The purpose of this study was to compare the cyclic fatigue resistances of Reciproc Blue (VDW, Munich, Germany), HyFlex EDM (Coltene/Whaledent, Altstätten, Switzerland), WaveOne Gold (Dentsply Maillefer, Ballaigues, Switzerland), and OneShape (Micro Mega, Besancon, France) single-file NiTi systems. METHODS: Thirty Reciproc Blue R25 (25/.08), 30 HyFlex EDM (25/.∼), 30 WaveOne Gold Primary (25/.07), and 30 OneShape (25/.06) instruments were included in this study...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527844/evaluation-of-various-pretreatments-to-fiber-post-on-the-push-out-bond-strength-of-root-canal-dentin
#7
Ömer Kırmalı, Özlem Üstün, Alper Kapdan, Alper Kuştarcı
INTRODUCTION: The aim of this in vitro study was to compare the effect of different pretreatments (fiber post) with the laser-activated irrigation (LAI) technique (for removal of the smear layer) on root canal dentin in terms of push-out bond strength (PBS) in a fiber post. METHODS: Fifty freshly extracted mandibular single-rooted premolars were prepared, and LAI was applied to all roots (17% EDTA was 5 mL for 120 seconds with an erbium, chromium:yttrium-scandium-gallium-garnet laser [0...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527842/diagnostic-accuracy-of-periapical-radiography-and-cone-beam-computed-tomography-in-identifying-root-canal-configuration-of-human-premolars
#8
Thiago Oliveira Sousa, Francisco Haiter-Neto, Eduarda Helena Leandro Nascimento, Leonardo Vieira Peroni, Deborah Queiroz Freitas, Bassam Hassan
INTRODUCTION: The aim of this study was to assess the diagnostic accuracy of periapical radiography (PR) and cone-beam computed tomographic (CBCT) imaging in the detection of the root canal configuration (RCC) of human premolars. METHODS: PR and CBCT imaging of 114 extracted human premolars were evaluated by 2 oral radiologists. RCC was recorded according to Vertucci's classification. Micro-computed tomographic imaging served as the gold standard to determine RCC...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527840/prevalence-of-middle-mesial-canals-and-isthmi-in-the-mesial-root-of-mandibular-molars-an-in%C3%A2-vivo-cone-beam-computed-tomographic-study
#9
Mehrnaz Tahmasbi, Poorya Jalali, Madhu K Nair, Sevin Barghan, Umadevi P Nair
INTRODUCTION: Many studies have investigated the morphology of the mandibular molar, but the prevalence of the middle mesial (MM) canal in the mesial root of the mandibular molar is still the subject of controversy. In addition, in previous literature, a true MM canal has not been clearly distinguished from an isthmus between the mesiobuccal and mesiolingual canals. Therefore, the objectives of this study were 2-fold: METHODS: Ninety limited field of view cone-beam computed tomographic scans were observed...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527839/modulation-of-matrix-metalloproteinase-14-tissue-inhibitor-of-metalloproteinase-3-tissue-inhibitor-of-metalloproteinase-4-and-inducible-nitric-oxide-synthase-in-the-development-of-periapical-lesions
#10
Lorena Teodoro de Castro Cassanta, Virmondes Rodrigues, Jose Roberto Violatti-Filho, Benedito Alves Teixeira Neto, Vinícius Marques Tavares, Eduarda Castelo Branco Araujo Bernal, Danila Malheiros Souza, Marcelo Sivieri Araujo, Sanivia Aparecida de Lima Pereira, Denise Bertulucci Rocha Rodrigues
INTRODUCTION: Periapical cysts and granulomas are chronic lesions caused by an inflammatory immune response against microbial challenge in the root canal. Different cell types, cytokines, and molecules have been associated with periapical lesion formation and expansion. Therefore, because of the chronic inflammatory state of these lesions, the aim of this study was to evaluate the in situ expression of matrix metalloproteinase (MMP)-14 and -19, tissue inhibitor of metalloproteinase (TIMP)-3 and -4, CD68, and inducible nitric oxide synthase (iNOS) in periapical cysts and granulomas...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527685/optic-canal-decompression-a-comparison-of-two-surgical-techniques
#11
Paulo Moacir Mesquita, Daniel M Prevedello, Luciano Prevedello, Leo F Ditzel Filho, Mariano E Fiore, Ricardo L Dolci, Lamia Buohliqah, Bradley A Otto, Ricardo Carrau
No abstract text is available yet for this article.
May 17, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28527653/ultrasound-biomicroscopy-measurement-of-schlemm-s-canal-in-pediatric-patients-with-and-without-glaucoma
#12
Anika Tandon, Caroline Watson, Ramesh Ayyala
PURPOSE: To compare the diameter of Schlemm's canal in children with and without congenital glaucoma as measured in vivo by means of ultrasound biomicroscopy. METHODS: In this prospective single-center study of pediatric subjects (<18 years of age) the diameter of Schlemm's canal in nonglaucomatous and glaucomatous eyes was compared. An 80 MHz iUltrasound probe (iScience Interventional Inc, Menlo Park, CA) placed near the limbus was used to identify and measure the canal's diameter with special attention to the anterior segment anatomy (especially in subjects with congenital glaucoma)...
May 17, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28527594/whole-globe-biomechanics-using-high-field-mri
#13
Andrew P Voorhees, Leon C Ho, Ning-Jiun Jan, Huong Tran, Yolandi van der Merwe, Kevin Chan, Ian A Sigal
The eye is a complex structure composed of several interconnected tissues acting together, across the whole globe, to resist deformation due to intraocular pressure (IOP). However, most work in the ocular biomechanics field only examines the response to IOP over smaller regions of the eye. We used high-field MRI to measure IOP induced ocular displacements and deformations over the whole globe. Seven sheep eyes were obtained from a local abattoir and imaged within 48 h using MRI at multiple levels of IOP. IOP was controlled with a gravity perfusion system and a cannula inserted into the anterior chamber...
May 17, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28526645/carotid-falciform-optic-neuropathy-microsurgical-treatment
#14
M Neil Woodall, Cargill H Alleyne
BACKGROUND: Several recent reports have implicated vascular ectasia and vessel contact with dysfunction of the visual apparatus. A subset of patients with pre-chiasmatic visual deterioration have an ectatic internal carotid artery (ICA) that displaces and flattens the optic nerve (ON) rostrally as the ON exits the skull base. We will offer a proposed pathophysiological mechanism and describe a straightforward surgical technique for dealing with this interesting problem. METHODS: Via an ipsilateral pterional craniotomy, the bony roof of the optic canal is removed...
May 16, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28526502/hemodynamic-parameters-predict-adverse-outcomes-following-biventricular-conversion-with-single-ventricle-palliation-takedown
#15
Melissa A Herrin, David Zurakowski, Christopher W Baird, Puja Banka, Jesse J Esch, Pedro J Del Nido, Sitaram M Emani
OBJECTIVE: Patients with a borderline left ventricular hypoplasia in the hypoplastic left heart syndrome variant or an unbalanced atrioventricular canal who undergo initial single-ventricle palliation may be candidates for biventricular (BiV) conversion following left ventricle (LV) recruitment procedures. We investigated associations among preoperative parameters and postoperative outcomes in patients undergoing BiV conversion. METHODS: We performed a retrospective review of patients who underwent BiV conversion to determine variables associated with clinical outcomes...
April 11, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28526468/-a-comparison-of-three-different-needles-used-for-spinal-anesthesia-in-terms-of-squamous-epithelial-cell-transport-risk
#16
Ünal Kantekin Çiğdem, Şahin Sevinç, Bolat Esef, Öztürk Süreyya, Gencer Muzaffer, Demirel Akif
BACKGROUND AND OBJECTIVES: To investigate the differences in the number of squamous epithelial cells carried to the spinal canal by three different types of spinal needle tip of the same size. METHODS: Patients were allocated into three groups (Group I, Group II, Group III). Spinal anesthesia was administered to Group I (n=50) using a 25G Quincke needle, to Group II (n=50) using a 25G pencil point spinal needle, and to Group III (n=50) using a non-cutting atraumatic needle with special bending...
May 16, 2017: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/28525480/a-new-entrance-technique-for-c2-pedicle-screw-placement-and-the-use-in-patients-with-atlantoaxial-instability
#17
Jia-Ming Liu, Jian Jiang, Zhi-Li Liu, Xin-Hua Long, Wen-Zhao Chen, Yang Zhou, Song Gao, Lai-Chang He, Shan-Hu Huang
STUDY DESIGN: A prospective study and a technique note. OBJECTIVES: To introduce a new entrance technique for C2 pedicle screw placement and to measure the related linear and angular parameters about the entrance point on computed tomography (CT) images. The safety of this technique for patients with atlantoaxial instability was also evaluated. BACKGROUND DATA: Although earlier studies have introduced different methods for C2 pedicle screw placement, the entry points and the angular parameters may be variable...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28525466/facet-preserving-technique-by-en-bloc-flavectomy-in-microscopic-posterior-decompression-surgery-for-lumbar-spinal-stenosis-semicircumferential-decompression-scd
#18
Yasushi Fujiwara, Hideki Manabe, Tadayoshi Sumida, Bunichiro Izumi, Kazuyoshi Nakanishi, Nobuhiro Tanaka, Nobuo Adachi
Posterior decompression surgery which enlarges the spinal canal in cases with lumbar spinal stenosis is the most fundamental technique in spine surgery, but controversy still remains for the exact technique. Because nerve roots run under the ventral side on the superior articular process (SAP), achieving both facet joint preservation and nerve root decompression is problematic. In conventional laminotomies or laminectomies, medial facetectomies are performed to decompress the nerve root, but it is ideal to preserve the facet joints completely for preserving joint stability...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28524249/telomere-attrition-and-growth-a-life-history-framework-and-case-study-in-common-terns
#19
Oscar Vedder, Simon Verhulst, Christina Bauch, Sandra Bouwhuis
The relationship between growth and age-specific telomere length, as a proxy of somatic state, is increasingly investigated, but observed patterns vary and a predictive framework is lacking. We outline expectations based on the assumption that telomere maintenance is costly and argue that individual heterogeneity in resource acquisition is predicted to lead to positive covariance between growth and telomere length. However, canalization of resource allocation to the trait with a larger effect on fitness, rendering that trait relatively invariant, can cause the absence of covariance...
May 19, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28523740/new-data-about-semicircular-canal-morphology-and-locomotion-in-modern-hominoids
#20
Anne Le Maître, Philipp Schuetz, Patrick Vignaud, Michel Brunet
The labyrinth has two functional parts: the cochlea for audition and the vestibular system for equilibrioception. In the latter, the semicircular ducts and the otolithic organs are sensitive to rotational and linear accelerations of the head, respectively. The labyrinthine morphology influences perception accuracy, hence the adaptation to a specific locomotor pattern. The aim of this study is to determine the relationship between locomotion and semicircular canal morphology using geometric morphometrics, and to explain these links with existing functional models...
May 19, 2017: Journal of Anatomy
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