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Apical leakage

Marwa Abdel Hafez, Mona Elkateb, Sonia El Shabrawy, Amel Mahmoud, Omar El Meligy
AIM: To evaluate the microleakage of composite restorations following Papain-based chemo-mechanical caries removal compared to the conventional drilling method. The characteristic of the hybrid layer was also studied using scanning electron microscopy. STUDY DESIGN: The sample included thirty freshly extracted and exfoliated primary molars with open proximal carious dentin lesions. Teeth were divided into two equal groups, according to method of caries removal. Following caries removal, cavity preparations were restored with composite resin...
2017: Journal of Clinical Pediatric Dentistry
Sohrab Tour Savadkouhi, Hengameh Bakhtiar, Safoura Emami Ardestani
The aim of this study was to perform a literature review of published in-vitro and ex-vivo studies, which evaluated microbial leakage in endodontics in the past 10 years. A comprehensive electronic literature search was carried out in PubMed database for English articles published from 2005 to 2016 using the keywords "endodontics," "in vitro," "ex vivo," "microbial leakage," "microbial penetration," "saliva," "Enterococcus faecalis," "E. faecalis," "endodontic sealers," "temporary filling material," "apical plug," "mineral trioxide aggregate," and "MTA...
November 2016: Journal of International Society of Preventive & Community Dentistry
Dong An, Qiuxiang Ma, Wei Yan, Wenzhi Zhou, Guanghua Liu, Peng Zhang
Cassava is a tropical origin plant that is sensitive to chilling stress. In order to understand the CBF cold response pathway, a well-recognized regulatory mechanism in temperate plants, in cassava, overexpression of an Arabidopsis CBF3 gene is studied. This gene renders cassava increasingly tolerant to cold and drought stresses but is associated with retarded plant growth, leaf curling, reduced storage root yield, and reduced anthocyanin accumulation in a transcript abundance-dependent manner. Physiological analysis revealed that the transgenic cassava increased proline accumulation, reduced malondialdehyde production, and electrolyte leakage under cold stress...
2016: Frontiers in Plant Science
Xingwang Liu, Bin Liu, Shudan Xue, Yanlinq Cai, Wenzhu Qi, Chen Jian, Shuo Xu, Ting Wang, Huazhong Ren
Nitric oxide (NO) is a gaseous signaling molecule in plants, transducing information as a result of exposure to low temperatures. However, the underlying molecular mechanism linking NO with chilling stress is not well understood. Here, we functionally characterized the cucumber (Cucumis sativus L.) nitric oxide synthase-associated gene, NITRIC OXIDE ASSOCIATED 1 (CsNOA1). Expression analysis of CsNOA1, using quantitative real-time PCR, in situ hybridization, and a promoter::╬▓-glucuronidase (GUS) reporter assay, revealed that it is expressed mainly in the root and shoot apical meristem (SAM), and that expression is up-regulated by low temperatures...
2016: Frontiers in Plant Science
Feifei An, Genghu Li, Qing X Li, Kaimian Li, Luiz J C B Carvalho, Wenjun Ou, Songbi Chen
Cassava (Manihot esculenta Crantz) is a tropical root crop and sensitive to low temperature. However, it is poorly to know how cassava can modify its metabolism and growth to adapt to cold stress. An investigation aimed at a better understanding of cold-tolerant mechanism of cassava plantlets was carried out with the approaches of physiology and proteomics in the present study. The principal component analysis of seven physiological characteristics showed that electrolyte leakage (EL), chlorophyll content, and malondialdehyde (MDA) may be the most important physiological indexes for determining cold-resistant abilities of cassava...
2016: Plant Molecular Biology Reporter
Jane-Dar Lee, Ming-Huei Lee, Wen-Kai Yang, Kuan-Lin Wang, Tsung-Han Lee
OBJECTIVE: To investigate the changes including expression and localization of 2 potassium channels, renal outer medullary K(+) channel (ROMK) and voltage-gated K(+) channel 7.1 (KCNQ1), after increased urinary potassium leakage in patients with interstitial cystitis/painful bladder syndrome (IC/PBS). MATERIALS AND METHODS: The study group included 24 patients with IC/PBS and a control group consisting of 12 volunteers without any IC/PBS symptoms. Bladder biopsies were taken from both groups...
November 14, 2016: Urology
Takehiro Sakai, Masahiro Sawada, Yutaka Sato, Futoshi Kimura, Nobuo Yagihashi, Tadashi Iwabuchi, Daisuke Kimura, Takao Tsushima, Ryo Hatanaka
A 61-year-old man visited a physician complaining of progressive chest pain and dyspnea. The chest radiography showed complete collapse of the right lung suggesting tension pneumothorax. The patient was transferred to our hospital. A small amount of the right pleural effusion was also seen in addition to pulmonary collapse on the chest radiography. Chest drainage was performed, and continuous air leakage was seen. At 2 hours later, air leakage was disappeared but the bloody effusion was noted. The chest radiography revealed massive effusion and the enhanced computed tomography showed active bleeding...
November 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
Shahriar Shahriari, Farhad Faramarzi, Mohammad-Yousef Alikhani, Maryam Farhadian, Seyedeh Sareh Hendi
INTRODUCTION: This in vitro study compared the apical sealing ability of three common root end filling materials namely mineral trioxide aggregate (MTA), intermediate restorative material (IRM) and calcium-enriched mixture (CEM) cement using a bacterial leakage model. METHODS AND MATERIALS: The study was conducted on 83 single-rooted human teeth. Tooth crowns were cut and root canals were prepared using the step-back technique. Apical 3 mm of the roots were cut and a three-mm-deep cavity was prepared using an ultrasonic instrument...
2016: Iranian Endodontic Journal
Radu Campean, Matthias Hasun, Claudia St├Âllberger, Johannes Bucher, Josef Finsterer, Christoph Schnack, Franz Weidinger
BACKGROUND: Reversible left ventricular dysfunction, also termed Takotsubo cardiomyopathy, is rarely reported in Addison's disease after initiation of hormone replacement therapy. The pathogenesis of this cardiomyopathy is unknown. CASE PRESENTATION: A 41-year-old white woman with a history of autoimmune Hashimoto thyroiditis diagnosed 3 years earlier and acute adrenal insufficiency diagnosed 3 weeks earlier presented with new onset of heart failure New York Heart Association class IV, which had started shortly after initiation of hormone replacement therapy with hydrocortisone 20 mg/day and fludrocortisone 0...
October 12, 2016: Journal of Medical Case Reports
Kevin Phan, Joshua M Haswell, Joshua Xu, Yusuf Assem, Stephanie L Mick, Samir R Kapadia, Anson Cheung, Frederick S Ling, Tristan D Yan, Vakhtang Tchantchaleishvili
De novo progressive aortic insufficiency (AI) is a side effect frequently related to prolonged support with continuous-flow left ventricular assist devices (CF-LVAD). Its progression can result in recurrent clinical heart failure symptoms and significantly increased mortality. Recently, percutaneous intervention methods such as transcatheter aortic valve replacement (TAVR) and percutaneous occluder devices have emerged, However, given the very scarce global experience with these approaches, evidence in the literature is lacking...
September 22, 2016: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
Prajakta Patil, Vishnu P S Rathore, Chetan Hotkar, Snehal S Savgave, K Raghavendra, Priya Ingale
AIMS: The present study aimed to compare apical sealing ability between GuttaFlow and AH Plus. MATERIALS AND METHOD: Eighty extracted human maxillary anterior teeth with fully formed apex and straight root were collected for this study. The root canals were cleaned and shaped using a standard step back preparation to size 60# master apical file at the established working length and divided into four groups: Group 1, GuttaFlow sealer with gutta-percha; Group 2, AH Plus sealer with gutta-percha; Group 3, positive control group (Teeth were instrumented and left without obturation); Group 4, negative control group (Teeth were totally coated with nail varnish) Dye leakage was carried out...
July 2016: Journal of International Society of Preventive & Community Dentistry
Meraj Sultana, Mohammad A Musani, Iffat M Ahmed
AIMS AND OBJECTIVES: Endodontic treatment is directed to eliminate microbial challenges from the root canal system and to create a complete seal. The aim of this study was to assess the apical sealing ability of resin-based Epiphany-Resilon root canal filling system and to compare it with the sealing abilities of different combinations of AH Plus, gutta-percha, Epiphany, and Resilon. MATERIALS AND METHODS: One hundred extracted human maxillary incisor roots were treated endodontically...
July 2016: Journal of International Society of Preventive & Community Dentistry
Raheleh Emami, Sedigheh Khedmat, Salma Pirmoazen, Kiamars Honardar
OBJECTIVES: The aim of this study was to compare apical sealing ability of alpha and beta phases of gutta-percha by means of bacterial leakage model. MATERIALS AND METHODS: Fifty single-rooted human premolars were selected. The root canals were prepared with Mtwo rotary instruments up to apical #35.04. Forty teeth were randomly divided into two groups (n= 20). The root canals were obturated by alpha phase (G1) and beta phase (G2) of gutta-percha and AH26 sealer, respectively, with warm vertical compaction technique...
November 2015: Journal of Dentistry of Tehran University of Medical Sciences
Saskia Pokorny, Katharina Huenges, Jan Hinerk Hansen, Yannik Schadow, Gunther Fischer, Michael M Morlock, Jochen Cremer, Georg Lutter
OBJECTIVES: A large cohort of patients suffering from severe mitral regurgitation does not meet the indications for conventional surgery and would greatly benefit from a transcatheter approach in the beating heart. Consequently, off-pump transcatheter mitral valve procedures have been the focus of recent research. The aim of this study was the in vivo evaluation and comparison of subannular versus apical fixation of mitral valved stents to show the feasibility of subannular anchorage...
July 29, 2016: European Journal of Cardio-thoracic Surgery
Fatemeh Ayatollahi, Mahdi Tabrizizadeh, Milad Hazeri Baqdad Abad, Reza Ayatollahi, Fatemeh Zarebidoki
INTRODUCTION: Microleakage is of the causes of endodontic treatment failure. The aim of this in vitro study, was to compare the microleakage of mineral trioxide aggregate (MTA) and calcium-enriched mixture (CEM) cement apical plugs in three environments. METHODS AND MATERIALS: A total of 130 human extracted single rooted teeth were collected. After decoronation, preparation of the root canal space and simulation of open apices, 5 teeth were selected as positive and negative control groups and the rest of the samples were randomly divided into two groups (MTA plug and CEM cement plug) and each group was divided into 3 subgroups (dry, contaminated with saliva and contaminated with blood)...
2016: Iranian Endodontic Journal
Manoj S Likhitkar, Shantaram V Kulkarni, Aravind Burande, Vishal Solanke, C Sushil Kumar, Babasaheb Kamble
AIMS AND OBJECTIVES: The success of root canal treatment depends on proper debridement, instrumentation, proper accessibility, and proper restoration. The presence of a smear layer is considered to be a significant factor. This in vitro study was conducted to assess the effect of the presence/absence of a smear layer on the microleakage of root canal filled teeth using different instruments and obturation methods. MATERIALS AND METHODS: One hundred extracted mandibular premolars with closed apices and single roots were chosen and then divided into six groups, A to F, consisting of 15 teeth each...
May 2016: Journal of International Society of Preventive & Community Dentistry
Korbinian Benz, Ljubisa Markovic, R A Jordan, Claudia Novacek, Jochen Jackowski
To determine whether the selection of retrograde filling material or the choice of instruments in root tip resection influences the seal of the retrograde root filling. Seventy-two single-rooted teeth were used. Root resection was performed using a Lindemann bone cutter, a Lindemann bone cutter with A-shaped cutting design or a diamond-coated bur. Retro-cavities were prepared by piezo-tips and filled with Super-EBA or MTA. Teeth were made transparent and dye penetration was assessed. Teeth filled with MTA, irrespective of the resection instrument, showed no measurable dye penetration...
May 30, 2016: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
Yasunobu Funakoshi, Kenichi Ohmori, Shinichi Takeda
Severe subcutaneous emphysema sometimes develops after pulmonary resection. We report our management of ten patients who were treated with subcutaneous Penrose drainage. Water seal test at chest closure showed no air leakage in 5, and a small amount in 5. Chest X-ray at the progression of massive subcutaneous emphysema showed no obvious pneumothorax in 2, and slight apical pneumothorax in 8. Subcutaneous emphysema developed after removal of chest tubes in 6, and before removal in 4. Subcutaneous drains were inserted at the midclavicular line or the side chest in 8, and both in 2...
May 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
Vineeta Nikhil, Padmanabh Jha, Navleen Kaur Suri
AIM: The purpose of the study was to evaluate and compare the sealing ability of mineral trioxide aggregate (MTA) with three different methods. MATERIALS AND METHODS: Forty single canal teeth were decoronated, and root canals were enlarged to simulate immature apex. The samples were randomly divided into Group MD = MTA-angelus mixed with distilled water and Group MC = MTA-angelus mixed with 2% chlorhexidine, and apical seal was recorded with glucose penetration method, fluid filtration method, and dye penetration methods and compared...
May 2016: Journal of Conservative Dentistry: JCD
Rambabu Tanikonda, Prasanthi N V D Nalam, Girija S Sajjan, B H Vijaya Lakshmi, K Madhu Varma, R Kalyan Satish
INTRODUCTION: Obturation of the root canal system is required to prevent recontamination of the root canal after cleaning and shaping procedures and to seal the root canal completely, both the apical and coronal avenues of potential leakage and to maintain the disinfected status. AIM: The aim of this study was to determine the microleakage by dye leakage method at 1mm, 3mm and 5mm short of the apex with different sizes of apical preparation, obturated by Obtura...
April 2016: Journal of Clinical and Diagnostic Research: JCDR
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