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Journal articles on the topic 'Apical area'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Esposito, John V. "Apical Violation in Periapical "Area" Cases." Dental Clinics of North America 34, no. 1 (1990): 171–78. http://dx.doi.org/10.1016/s0011-8532(22)01175-2.

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MORALES, EDUARDO A., MARIA HELENA NOVAIS, CARLOS E. WETZEL, LUC ECTOR, and MARIA MANUELA MORAIS. "Fragilaria odeloucaensis sp. nov. (Bacillariophyta, Fragilariaceae) a diatom from temporary streams in southern Portugal." Phytotaxa 555, no. 3 (2022): 217–30. http://dx.doi.org/10.11646/phytotaxa.555.3.1.

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A new species of araphid diatom is described from a temporary stream in southern Portugal, Fragilaria odeloucaensis sp. nov., which belongs to the group of Fragilaria with widely linear to lanceolate valve outline, spaced striae, lacking spines, and with well-developed apical pore fields. The new taxon can be distinguished based on five unique features within this group, the lanceolate valves with capitate apices, the zig-zagged axial area, the central area with squared fascia, the apical pore fields clearly sunken into the valve apices and the heterovalvar frustules (with respect to striae di

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Xie, Shicong, Frank M. Mason та Adam C. Martin. "Loss of Gα12/13 exacerbates apical area dependence of actomyosin contractility". Molecular Biology of the Cell 27, № 22 (2016): 3526–36. http://dx.doi.org/10.1091/mbc.e16-05-0305.

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During development, coordinated cell shape changes alter tissue shape. In the Drosophila ventral furrow and other epithelia, apical constriction of hundreds of epithelial cells folds the tissue. Genes in the Gα12/13 pathway coordinate collective apical constriction, but the mechanism of coordination is poorly understood. Coupling live-cell imaging with a computational approach to identify contractile events, we discovered that differences in constriction behavior are biased by initial cell shape. Disrupting Gα12/13 exacerbates this relationship. Larger apical area is associated with delayed in

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Nugroho, Juni Jekti, and Aisyah Pertiwi Utami. "Apical patency as a way of preserving the apical third area of endodontic treatment." Makassar Dental Journal 9, no. 3 (2020): 181–83. http://dx.doi.org/10.35856/mdj.v9i3.350.

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Introduction: The apical third of the root canal system is very complex portion and challenging during endodontic treatment. Blockage of the root canal in the apical region by remnants of hard tissue and soft tissue debris, may cause procedural errors such as apical transportations, ledge and perforation. These debris contain bacteria inducing periradicular disease. The apical patency technique is considered as a way for maintaining the apical part free of debris by recapitulation using a small K-file through the apical foramen to assure that the canal system is predictably negotiable. Aim: To

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Kaur, H., S. Chaudhary, and P. Tangde. "MTA : Boon to Apexification." Journal of Oral Health and Community Dentistry 7, no. 2 (2013): 114–18. http://dx.doi.org/10.5005/johcd-7-2-114.

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ABSTRACT A significant problem associated with the endodontic treatment of necrotic teeth with open apices is achieving an acceptable seal in the apical area to allow compaction of root filling material. The procedure to create an apical barrier with a hard tissue at the root end is termed as Apexification. Calcium hydroxide is currently the most accepted material for the same. Because of the certain inadequacies associated with Calcium hydroxide Apexification, employing of an apical plug using MTA (Mineral Trioxide aggregate) has gained popularity in recent years. This article is thus an insi

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Hillary, Natasya, Citra Kusumasari, and Ahmed Abdou. "Bioceramic cement as a reparative material in apexification of immature permanent tooth: a case report." Jurnal Kedokteran Gigi Universitas Padjadjaran 36, no. 4 (2024): 111. http://dx.doi.org/10.24198/jkg.v36i4.49880.

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ABSTRACTIntroduction: Bioceramic cement is the latest material of choice that can be used in apexification, resorption case, perforation repair, and known as high-quality sealing material in regenerative endodontics. The treatment of apexification in immature teeth poses a considerable challenge due to the wide root canal, the absence of apical constriction, and thin dentin walls, thus requiring specialized techniques and materials for managing teeth with an open apex. The objective of this case report is to delineate the treatment of apexification in teeth with open apices using the latest bi

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Stetson, D. L. "Turtle urinary bladder: regulation of ion transport by dynamic changes in plasma membrane area." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 257, no. 5 (1989): R973—R981. http://dx.doi.org/10.1152/ajpregu.1989.257.5.r973.

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Turtle urinary bladder possesses four ion transport processes: Na+ absorption, H+ secretion, and HCO3- secretion-Cl- absorption. Each transport process is performed by a specific epithelial cell type. Granular cells absorb Na+ but they are not sensitive to antidiuretic hormone (ADH), unlike toad bladder granular cells. alpha-Carbonic anhydrase-rich (CA) cells secrete H+ via an apical H+-adenosinetriphosphatase (ATPase). Under conditions of low CO2 tension, this active pump is contained in the limiting membranes of certain cytoplasmic vesicles. The vesicles fuse with the apical membrane, and H+

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Ishiuchi, Takashi, Kazuyo Misaki, Shigenobu Yonemura, Masatoshi Takeichi, and Takuji Tanoue. "Mammalian Fat and Dachsous cadherins regulate apical membrane organization in the embryonic cerebral cortex." Journal of Cell Biology 185, no. 6 (2009): 959–67. http://dx.doi.org/10.1083/jcb.200811030.

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Compartmentalization of the plasma membrane in a cell is fundamental for its proper functions. In this study, we present evidence that mammalian Fat4 and Dachsous1 cadherins regulate the apical plasma membrane organization in the embryonic cerebral cortex. In neural progenitor cells of the cortex, Fat4 and Dachsous1 were concentrated together in a cell–cell contact area positioned more apically than the adherens junction (AJ). These molecules interacted in a heterophilic fashion, affecting their respective protein levels. We further found that Fat4 associated and colocalized with the Pals1 com

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Sheikh, Md Abdul Hannan, Abdul Kader Shaikh, Kamrunnahar, and Sultana Parveen. "Management of Non-vital Maxillary Central Incisors with Open Apices by MTA Plugging." Journal of Bangladesh College of Physicians and Surgeons 35, no. 4 (2017): 196–99. http://dx.doi.org/10.3329/jbcps.v35i4.34741.

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The major challenge of performing root canal treatment in an open apex pulp-less tooth is to obtain a good apical seal. An 11 year old boy was presented with pain in his upper anterior teeth. On clinical examination both the maxillary central incisors revealed slight discoloration and fracture of the crown. Radiographic evaluation revealed radiolucency and open apices of both central incisors. Apexification with MTA apical plug was carried out before obturation with gutta-percha and sealer and the treatment was completed within 3 consecutive appointments. In twelve months follow up both the te

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IJzendoorn, Sven C. D. van, Mirjam M. P. Zegers, Jan Willem Kok, and Dick Hoekstra. "Segregation of Glucosylceramide and Sphingomyelin Occurs in the Apical to Basolateral Transcytotic Route in HepG2 Cells." Journal of Cell Biology 137, no. 2 (1997): 347–57. http://dx.doi.org/10.1083/jcb.137.2.347.

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HepG2 cells are highly differentiated hepatoma cells that have retained an apical, bile canalicular (BC) plasma membrane polarity. We investigated the dynamics of two BC-associated sphingolipids, glucosylceramide (GlcCer) and sphingomyelin (SM). For this, the cells were labeled with fluorescent acyl chainlabeled 6-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)- amino]hexanoic acid (C6-NBD) derivatives of either GlcCer (C6-NBD-GlcCer) or SM (C6-NBD-SM). The pool of the fluorescent lipid analogues present in the basolateral plasma membrane domain was subsequently depleted and the apically located C6-NBD

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Carvalho, Rafael Henrique de Oliveira, Marcelo Santos Coelho, Hugo Victor Dantas, et al. "Influence of different working lengths on the shaping ability of Reciproc Blue in the apical third and apical foramen." Brazilian Journal of Oral Sciences 22 (December 19, 2023): e231400. http://dx.doi.org/10.20396/bjos.v22i00.8671400.

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Aim: This study aimed to assess the shaping ability of Reciproc Blue in the apical third and apical foramen of moderately curved canals at different working lengths (WLs), by micro-computed tomography. Methods: Thirty-six mesial roots (mesiobuccal and mesiolingual canals) were included, each with 2 separate root canals and independent apical foramina, according to type IV of Vertucci’s classification of first and second mandibular molars. The canals were instrumented at three different WLs: G-1, 1mm short of the major apical foramen; G0, at the major apical foramen; G+1, 1mm beyond the major a

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Darmawanti, Miranti Putri, Ade Prijanti Dwisaptarini, and Dina Ratnasari. "Mineral Trioxide Aggregate Apical Plug and Intracoronal Bleaching on Dental Trauma: Report of Cases." Jurnal Kedokteran Gigi Universitas Padjadjaran 36, no. 4 (2024): 139. http://dx.doi.org/10.24198/jkg.v36i4.49869.

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ABSTRAKPendahuluan: Trauma dapat menyebabkan nekrosis pulpa, resorpsi eksternal, gangguan proses penutupan bagian apikal, dan perubahan warna gigi. MTA memiliki aktivitas antimikroba, biokompatibilitas yang sangat baik, dan kemampuan sealing yang unggul. Bleaching intrakoronal dapat digunakan untuk mengembalikan warna gigi setelah perawatan endodontik. Perawatan apikal yang terbuka dapat dilakukan dengan menggunakan MTA sebagai apical plug. Kasus trauma gigi yang disertai dengan diskolorasi dapat dilakukan bleaching intrakoronal serta MTA sebagai apical plug. Laporan kasus ini bertujuan untuk

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De Assis Dansa, Claudia Valeria, Carlos Frederico, and Duarte Rocha. "An ant-membracid-plant interaction in a cerrado area of Brazil." Journal of Tropical Ecology 8, no. 3 (1992): 339–48. http://dx.doi.org/10.1017/s0266467400006635.

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ABSTRACTIn the Cerrado of Itirapina, Brazil, 34% of the shrubs of Didymopanax vinosum (Araliaceae) were colonized by the honeydew-producing homopteran Aconophora teligera (Membracidae) which was found exclusively on this species of plant. Correlations were made between membracid density and ant frequency, as well as between these parameters and plant damage. We found that: (1) ant frequency was higher on branches with membracids and both were more frequently found near apical meristems; (2) herbivore damage was lower on apical meristems where the membracids concentrate than on ones where they

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Campos, Marcio Jose da Silva, Helen Vidon Gomes, Paula Liparini Caetano, Marcelo Reis Fraga, and Robert Willer Farinazzo Vitral. "Is relevant the underestimation of irregular apical root resorption by periapical radiographs?" HU Revista 45, no. 3 (2019): 237–43. http://dx.doi.org/10.34019/1982-8047.2019.v45.28678.

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Introduction: Periodic control of root resorption during orthodontic treatment is frequently made by two-dimensional radiographic examinations, in which irregular resorptions are not detected buccolingually. Aim: Quantifying the resorbed root area of incisors with irregular apical root resorption underestimated by two-dimensional radiographic methods. Materials and Methods: Cone beam computed tomography images of 18 patients whose incisors presented irregular apical root resorption underestimated by two-dimensional radiographic methods and their contralateral correspondents without resorption

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Baraldi, Carlos Eduardo, and Edela Puricelli. "Estudo in vitro das alterações morfológicas da superfície de raízes submetidas à apicectomia e írradiadas com laser de Nd:YAG." Revista da Faculdade de Odontologia de Porto Alegre 40, no. 2 (2021): 29–35. http://dx.doi.org/10.22456/2177-0018.110988.

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Introduction: success rates of apical surgery are variable, and there are several causes of failure related in the literature. Among them, permeability of exposed dentin at the apical surface after apicoectomies has been receiving much attention, Nd: YAG laser irradiation can decrease this permeability, but its effects on root surface are not completely known. Objectives: evaluate morphological alterations of apical surface, specially surface smoothness, after Nd: YAG non contact laser irradiation, in different powers, in vitro. Material and Methods: thirty extracted human cuspids, maintained

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Bassvanna, R. S., and Chitra Gohil. "APEXIFICATION WITH BIODENTINE - A CASE REPORT." CODS Journal of Dentistry 5, no. 2 (2013): 3–5. http://dx.doi.org/10.5005/cods-5-2-3.

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ABSTRACT Management of non vital teeth with open apices isa challenge to the dental practitioners. In this clinical scenario, it is difficult to maintain the obturating material confine within the root canal without encroaching into periapical area. These kinds of cases cannot be managed by conventional endodontic treatment, and treatment of such cases with calcium hydroxide may take longer time for apical closure. But with this new material called BIODENTINE (Septodont) same treatment can be done in single visit with predictable result. Hence this case report present the use ofbiodentine to f

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Shakir Amory, Zainab, Hashim Mueen Hussein, Aya Nashwan Naji, and Mustafa Tariq Mutar. "Effect of academic-environmental stress on apical periodontitis of non-endodontic teeth." Medical Journal of Babylon 21, no. 1 (2024): 65–70. http://dx.doi.org/10.4103/mjbl.mjbl_103_23.

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Abstract Background: The periapical area of a tooth was diagnosed using radiography; many types of risk factors can affect the health of the apical area which is the stress during life. Objective: To analyze the prevalence of academic-environmental stress and apical periodontitis in non-endodontic teeth of dental students using cone-beam computed tomography (CBCT) X-ray, and to demonstrate the association between stress and the prevalence of apical periodontitis. Materials and Methods: Cross-sectional study was done on the 103 recruited dental students aged 22–24 years during the final examina

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T D, Geo, Saurabh Gupta, and Payal Saxena. "Non-Surgical Management of Apical Root Resorption of Maxillary Lateral Incisor with Dens in Dente - A Case Report." International Journal of Health Sciences and Research 13, no. 2 (2023): 80–84. http://dx.doi.org/10.52403/ijhsr.20230213.

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Dens in dente is a developmental anomaly which occurs as a consequence of invagination of external tooth surface of crown before the calcification is complete. Complexity of dens in dente ranges from invagination within the limit of cement-enamel junction to that penetrates through the root perforating at the apical area showing a ‘second foramen’ in the apical or periodontal area. Because of the bizarre root canal anatomy and associated peri apical pathology; the management of such teeth might end up with combination of endodontic-surgical intervention or extraction. This article describes th

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Nemes, A., Z. Kovács, Á. Kormányos, et al. "Left ventricular apical rotation is associated with mitral annular function in healthy subjects. Results from the three-dimensional speckle-tracking echocardiographic MAGYAR-Healthy Study." Physiology International 107, no. 1 (2020): 145–54. http://dx.doi.org/10.1556/2060.2020.00002.

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AbstractIntroductionLeft ventricular (LV) twist is considered an essential part of LV function due to oppositely directed LV basal and apical rotations. Several factors could play a role in determining LV rotational mechanics in normal circumstances. This study aimed to investigate the relationship between LV rotational mechanics and mitral annular (MA) size and function in healthy subjects.MethodsThe study comprised 118 healthy adult volunteers (mean age: 31.5 ± 11.8 years, 50 males). All subjects had undergone complete two-dimensional (2D) Doppler echocardiography and three-dimensional speck

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Grob, J. A., and J. N. Owens. "Techniques to study the cell cycle in conifer shoot apical meristems." Canadian Journal of Forest Research 24, no. 3 (1994): 472–82. http://dx.doi.org/10.1139/x94-064.

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A method is presented to determine the mitotic index of conifer shoot apical meristems in a rapid and standardized manner using permanent Feulgen-stained squash preparations observed with a series of horizontal scans at fixed vertical intervals. Interpretation and application of mitotic index and its relationship to the cell cycle are discussed. Methods used to label nuclei within conifer apical meristems with tritiated thymidine and procedures that may improve incorporation of label and decrease cellular damage are discussed. The percentage of cells in S stage was determined using autoradiogr

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Xiang, Dong-Qin, Rui Yang, Patrick Rioual, Yan Zheng, and Bing Liu. "Ctenophora hunanensis sp. nov. (Bacillariophyta) from the Yongle River in Hunan Province, China." PhytoKeys 250 (December 27, 2024): 181–91. https://doi.org/10.3897/phytokeys.250.140576.

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A new species, <i>Ctenophora hunanensis</i> Bing Liu & Rioual, sp. nov., found in the Yongle River, a tributary of the Xiang River (Hunan Province, southern China) is described on the basis of morphological observations made under light and scanning electron microscopes. <i>Ctenophora hunanensis</i> is distinguished from other <i>Ctenophora</i> taxa by a unique combination of characters that includes its lanceolate valve outline with rostrate apices, sternum gradually becoming wider from valve apices to center, and a greater valve width than the other members of the genus. <i>Ctenophora hu

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Chandhoke, P. S., R. K. Packer, and M. A. Knepper. "Apical acidification by rabbit papillary surface epithelium." American Journal of Physiology-Renal Physiology 258, no. 4 (1990): F893—F899. http://dx.doi.org/10.1152/ajprenal.1990.258.4.f893.

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The rabbit papillary surface epithelium (PSE) is a simple cuboidal epithelium that covers the outer surface of the renal papilla and has an apical surface that faces the urinary space. We studied acid-base transport in this epithelium by dissecting it from the papilla, mounting it in a modified Ussing chamber, and following pH changes in the apical bathing solution. The experiments demonstrated that the PSE is capable of acidifying the apical solution at a substantial rate. The acidification rate was similar with 100% nitrogen and 100% oxygen (with and without 10 microM antimycin A), ruling ou

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Sugiaman, Lestari Hardianti, and Nurhayaty Natsir. "Apexification with apical plug in immature permanent maxillary incisor teeth: case report." Makassar Dental Journal 11, no. 1 (2022): 80–83. http://dx.doi.org/10.35856/mdj.v11i1.515.

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This article describes about the apexification of open apex with apical plug in immature permanent maxillary incisor teeth. A 12-year-old girl came to the Dental Hospital Hasanuddin University with a complaint of cavities in her upper front teeth. The teeth were filled one year ago, and it fell out about six months later. The right upper tooth had been swollen and sore a few days be-fore. There is a history of colliding at the age of 8 years. Radiographic examination showed a wide root canal on tooth 11 and an open apex with radiolucency in the apical area on teeth 11 and 21. So the diagnosis

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Souza, Ronaldo Araújo, Yara T. Corrêa Silva Sousa, José Antônio Poli de Figueiredo, João Da Costa Pinto Dantas, Suely Colombo, and Jesus Djalma Pécora. "Relationship between files that bind at the apical foramen and foramen openings in maxillary central incisors - a SEM study." Brazilian Dental Journal 22, no. 6 (2011): 455–59. http://dx.doi.org/10.1590/s0103-64402011000600003.

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Considering that instrumentation of the apical foramen has been suggested for root canal infection control, this study analyzed the relationship between the files that bind at the apical foramen and the foraminal openings in 50 maxillary central incisors. After preparation of the pulp chamber, access to the canal was obtained with #1 and 2 LA Axxess and K-files with tip cut were inserted up to the apical foramen until binding was felt. The files were fixed with methyl cyanoacrylate and the tooth-file sets were cross-sectioned 10 mm short of the apex. Scanning electron microscopic analysis was

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Adamyan, K. G., A. L. Chilingaryan, N. G. Mkrtchyan, and L. G. Tunyan. "Mechanisms and predictors of ischemic mitral regurgitation at rest and on exertion in patients at early stage of myocardial infarction." Russian Journal of Cardiology 25, no. 2 (2020): 52–59. http://dx.doi.org/10.15829/1560-4071-2020-2-3098.

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Aim. Determination of the mechanisms and predictors of ischemic mitral regurgitation (IMR) at rest and on exertion in patients at early stage of myocardial infarction (MI).Material and methods. Seventy-seven patients with inferoposterior MI and 79 patients with anteroseptal apical MI were examined on the 7th day at rest and after exertion. We determined the degree of IMR (according to the PISA method), posteromedial and anterolateral papillary muscle (PM) displacement, closure height of the mitral valve (MV), systolic and diastolic mitral valve orifice area, volume of the left ventricle (LV),

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Hemery, I., A. M. Durand-Schneider, G. Feldmann, J. P. Vaerman, and M. Maurice. "The transcytotic pathway of an apical plasma membrane protein (B10) in hepatocytes is similar to that of IgA and occurs via a tubular pericentriolar compartment." Journal of Cell Science 109, no. 6 (1996): 1215–27. http://dx.doi.org/10.1242/jcs.109.6.1215.

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In hepatocytes, newly synthesized apical plasma membrane proteins are first delivered to the basolateral surface and are supposed to reach the apical surface by transcytosis. The transcytotic pathway of apical membrane proteins and its relationship with other endosomal pathways has not been demonstrated morphologically. We compared the intracellular route of an apical plasma membrane protein, B10, with that of polymeric IgA (pIgA), which is transcytosed, transferrin (Tf) which is recycled, and asialoorosomucoid (ASOR) which is delivered to lysosomes. Ligands and anti-B10 monoclonal IgG were li

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Albino Souza, Matheus, João Paulo De Carli, Fernando Tolfo Rodrigues, et al. "Evaluation of apical transportation and apical root sealing in root canals prepared with mtwo rotary system with and without apical enlargement – an in vitro study." Bioscience Journal 37 (January 12, 2021): e37004. http://dx.doi.org/10.14393/bj-v37n0a2021-56141.

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The aim of this study was to evaluate apical transportation and apical root canal sealing after root canal filling in human teeth prepared with MTwo® Rotary System with and without apical foramen enlargement. Twenty mandibular premolars were divided into two groups (n=10). Group 1 had root canals prepared 1mm beyond the apical foramen. Group 2 had root canals prepared 1mm below the root canal length. After chemo-mechanical preparation, samples were submitted to scanning electronic microscopy. Apical foramen images had 75x magnification at standardized positions, allowing measurements from the

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Ayoub, AA, and GSP Cheung. "Management of C-shaped canals using “Membrane-Barrier Technique”: A Case report." Compendium of Oral Science 9, no. 1 (2022): 80. http://dx.doi.org/10.24191/cos.v9i1.16912.

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A 61-year old Chinese female was referred from a general private practitioner for persistent buccal abscess after completion of root canal treatment of tooth 37. On clinical examination, tooth 37 presented with a metal-ceramic crown (CMC) with 2mm of gingival recession noted at the buccal region. The overlying amalgam core was overhanging on distal and grade 2 mobility. The 37 CMC have no contact point at the distal. Tooth 37 was not tender to palpation but tender to percussion. No periodontal pocketing was detected. The periapical radiograph revealed a periapical radiolucent area associated e

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B. Al-Saffar, Farah, and Hikmet A. Al-Gharrawi. "The Influence of NiTi File Design Features on the Apically Extruded Debris During Endodontic Treatment A concise reviews." Mustansiria Dental Journal 19, no. 2 (2023): 290–300. http://dx.doi.org/10.32828/mdj.v19i2.985.

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Expelling debris and irrigating solution during cleaning and shaping is an inevitable incidence during endodontic treatment. Any irritation of the periapical area can initiate a flareup situation which can affect the prognosis of endodontic treatment. Thus, Controlling the amount of apically extruded debris increases the success rate of endodontic treatment. Furthermore, the incidence of flare-ups during endodontic treatment can be reduced by selecting the NiTi file system with the lowest apically extruded debris. Despite the advances in endodontic file design that aims to conservatively prepa

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Lo Giudice, Giuseppe, Giuseppina Cutroneo, Antonio Centofanti, et al. "Dentin Morphology of Root Canal Surface: A Quantitative Evaluation Based on a Scanning Electronic Microscopy Study." BioMed Research International 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/164065.

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Dentin is a vital, hydrated composite tissue with structural components and properties that vary in the different topographic portions of the teeth. These variations have a significant implication for biomechanical teeth properties and for the adhesive systems utilized in conservative dentistry. The aim of this study is to analyse the root canal dentin going from coronal to apical zone to find the ratio between the intertubular dentin area and the surface occupied by dentin tubules varies. Observations were conducted on 30 healthy premolar teeth extracted for orthodontic reasons in patients ag

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Jawami, Afiq Azizi, Eason Soo, Dalia Abdullah, and Wong Lishen. "Surgical Management of Extruded Fractured Instrument Beyond the Periapical Area: A Case Report with Two-year Follow-up." Archives of Orofacial Sciences 18, no. 2 (2023): 167–77. http://dx.doi.org/10.21315/aos2023.1802.cr01.

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A fractured instrument is an undesirable endodontic mishap that can prevent complete root canal disinfection, thereby affecting the root canal treatment outcome. The present case discussed the surgical management of an extruded fractured barbed broach at the apical third of maxillary right first premolar. A 28-year-old female presented with an endodontic failure on tooth 14 and was diagnosed as previously root canal treated with symptomatic apical periodontitis. Radiographic examination revealed a straightline radiopacity structure that was 2 mm in length extruded from the apical root-end, sug

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Araki, Ângela Toshie, Yuji Ibraki, Tomofumi Kawakami, and José Luiz Lage-Marques. "Er:Yag laser irradiation of the microbiological apical biofilm." Brazilian Dental Journal 17, no. 4 (2006): 296–99. http://dx.doi.org/10.1590/s0103-64402006000400006.

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One problem in cases of healing-resistant periapical lesions is to eradicate the contamination at the periapical area. This contamination is due to the microbiological biofilm formed by microorganisms and their subproducts lodged in apical third of the root, on both cementum and dentin surface. Paraendodontic surgery consists of the mechanical removal of harmful agents to promote healing and periapical health. The purpose of this study was to assess the results of Er:YAG laser irradiation on the apical root third of newly extracted teeth to eliminate microbial contamination on root apex surfac

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Chieruzzi, Manila, Stefano Pagano, Carlo De Carolis, Stefano Eramo, and José M. Kenny. "Scanning Electron Microscopy Evaluation of Dental Root Resorption Associated With Granuloma." Microscopy and Microanalysis 21, no. 5 (2015): 1264–70. http://dx.doi.org/10.1017/s1431927615014713.

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AbstractThe inflammatory resorption of dental root apex (i.e., the process of removal of cementum and/or dentine through the activity of resorbing cells) may show different configurations and damage the apical root structure. As knowing the morphology of resorption areas of human teeth is essential for the success of endodontic treatments, we investigated the apical resorption by scanning electron microscopy, focusing on roots with granulomas. A total of 30 teeth (with penetrating carious lesions and chronic periapical lesions) were examined, the apical third of the roots were removed and anal

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Nemes, Attila, Nóra Ambrus, and Csaba Lengyel. "Does Left Ventricular Rotational Mechanics Depend on Aortic Valve Annular Dimensions in Healthy Adults?—A Three-Dimensional Speckle-Tracking Echocardiography-Derived Analysis from the MAGYAR-Healthy Study." Biomedicines 13, no. 4 (2025): 817. https://doi.org/10.3390/biomedicines13040817.

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Introduction. There is a balanced relationship between the left ventricle (LV), the aortic valve and the aorta, the functioning of which is essential for optimal circulation. Associations between simultaneously assessed LV rotational mechanics and aortic valve annular (AVA) dimensions respecting the cardiac cycle have never been assessed in clinical circumstances in healthy individuals by three-dimensional speckle-tracking echocardiography (3DSTE). The present study aimed to perform an extensive investigation in order to clarify their possible associations. Methods. The present study comprised

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Crossley, Aaron M., Phillip M. Campbell, Larry P. Tadlock, Emet Schneiderman, and Peter H. Buschang. "Is there a relationship between dental crowding and the size of the maxillary or mandibular apical base?" Angle Orthodontist 90, no. 2 (2019): 216–23. http://dx.doi.org/10.2319/051019-324.1.

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ABSTRACT Objective: To determine whether apical base size is related to dental crowding. Materials and Methods: Digital scans of dental casts were taken of 75 untreated Class I adults to measure maxillary and mandibular tooth size, dental arch perimeters, intermolar widths, and intercanine widths. Cone beam computed tomography (CBCT) images were used to measure the apical base of the maxilla and mandible, including the total cross-sectional area, five basal arch perimeters and five basal arch widths. Principal components factor analyses were performed to evaluate the relationships between the

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Hill, Warren G., John C. Mathai, Rebekah H. Gensure, et al. "Permeabilities of teleost and elasmobranch gill apical membranes: evidence that lipid bilayers alone do not account for barrier function." American Journal of Physiology-Cell Physiology 287, no. 1 (2004): C235—C242. http://dx.doi.org/10.1152/ajpcell.00017.2004.

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Teleosts and elasmobranchs faced with considerable osmotic challenges living in sea water, use compensatory mechanisms to survive the loss of water (teleosts) and urea (elasmobranchs) across epithelial surfaces. We hypothesized that the gill, with a high surface area for gas exchange must have an apical membrane of exceptionally low permeability to prevent equilibration between seawater and plasma. We isolated apical membrane vesicles from the gills of Pleuronectes americanus (winter flounder) and Squalus acanthias (dogfish shark) and demonstrated approximately sixfold enrichment of the apical

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Barrington, Rupert. "The influence of artificial selection on wing spot sizes, and the relationship between forewing and hindwing spots in the Meadow Brown Butterfly Maniola jurtina (Linnaeus, 1758), ssp. cassiteridum Graves, 1930 ab. anticrassipuncta Leeds, 1950 (Lepidoptera: Nymphalidae, Satyrinae)." Entomologist's Gazette 72, no. 3 (2021): 163–72. http://dx.doi.org/10.31184/g00138894.723.1796.

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Four generations of butterflies were reared from two female Maniola jurtina (Linnaeus, 1758) with enlarged apical spots (ab. anticrassipuncta Leeds, 1950) captured on St Mary's, Isles of Scilly, UK in 2013. The aim was to see how far this character could be developed through inbreeding. Previous work by Brakefield & van Noordwijk (1985) has looked at the relationship between forewing and hindwing spotting. The specimens retained from this experiment offered an opportunity to assess the correlation between the forewing spot size, additional forewing spots and hindwing spot size and number.

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Glinkin, V. V., and I. A. Voronov. "Regeneration of the apical region of the tooth after the treatment of destructive periodontitis with cement resorption." Endodontics Today 21, no. 4 (2024): 268–75. http://dx.doi.org/10.36377/1683-2981-2023-21-4-268-275.

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Aim. Destructive changes in the tissues of the tooth and periodontium entail resorption of the hard tissues of the tooth in the apical region. The goal is to identify morphological changes in root tissues with destructive periodontitis and resorption phenomena after the treatment of the tooth with calcium-containing preparations using a scanning electron microscope. Materials and methods. Examination of teeth treated for destructive forms of periodontitis with apical resorption was performed using a JSM-6490LV scanning electron microscope (JEOL, Japan) with an energy-dispersive attachment INCA

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Islam, Mohammad Aminul, Tasnim Wakia, Shamima Afroz, and Md Ali Asgor Moral. "Management of an upper central incisor having periapical pathology with unusual presentation." Update Dental College Journal 3, no. 2 (2014): 39–42. http://dx.doi.org/10.3329/updcj.v3i2.17998.

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The aim of this report is to discuss a case about a traumatized upper left central incisor presented with chronic periapical pathology with unusual presentation. In this case, the apical area of the tooth was exposed for a long period and the apex was open due to loss of affected tooth materials and its surrounding bone and soft tissue loss. The apical area was corrected with apical curettage and retrograde filling with Mineral Trioxide Aggregate (MTA) as well as soft tissue managed with pedicle flap design. The discolouration and mild shortening of the crown due to intrusive effect was manage

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Todea, Carmen, Daliana Mocuta, Adrian Manescu, et al. "Laser Use in Endodontic for Increase the Adhesion of Root Canal Filling. A synchrotron radiation micro tomography study." Revista de Chimie 69, no. 8 (2018): 2144–49. http://dx.doi.org/10.37358/rc.18.8.6489.

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The aim of the present paper is to explore, through a high-resolution synchrotron radiation-based micro computed tomography experiment, the efficiency of the Er:YAG laser involvement in the debridement of the root canal of pathologic teeth, applied after the chemo-mechanical treatment of the canal. The adhesion quality of root canal filling is the consequence of the root canal cleaning and shaping, thus preventing the leakage. Twelve extracted single-rooted teeth were considered. The first 5 mm of the roots, corresponding to the apical region of the teeth, were initially investigated through h

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Balestreire, Elena M., and Gerard Apodaca. "Apical Epidermal Growth Factor Receptor Signaling: Regulation of Stretch-dependent Exocytosis in Bladder Umbrella Cells." Molecular Biology of the Cell 18, no. 4 (2007): 1312–23. http://dx.doi.org/10.1091/mbc.e06-09-0842.

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The apical surface of polarized epithelial cells receives input from mediators, growth factors, and mechanical stimuli. How these stimuli are coordinated to regulate complex cellular functions such as polarized membrane traffic is not understood. We analyzed the requirement for growth factor signaling and mechanical stimuli in umbrella cells, which line the mucosal surface of the bladder and dynamically insert and remove apical membrane in response to stretch. We observed that stretch-stimulated exocytosis required apical epidermal growth factor (EGF) receptor activation and that activation oc

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Asgary, Saeed, Mahta Fazlyab, and Ali Nosrat. "Regenerative Endodontic Treatment versus Apical Plug in Immature Teeth: Three-Year Follow-Up." Journal of Clinical Pediatric Dentistry 40, no. 5 (2016): 356–60. http://dx.doi.org/10.17796/1053-4628-40.5.356.

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This report compares and evaluates the treatment outcomes of regenerative endodontic treatment and apical plug as two accepted treatment protocols in a pair of necrotic immature maxillary central incisors of a 12-year old female. The patient was referred complaining of a dull pain and swelling in her upper lip area. She had a history of trauma to the anterior maxilla two years earlier. Both teeth were clinically diagnosed with pulp necrosis and periapical radiographs revealed that separate periapical radiolucent lesions surrounded the immature apices of both teeth. The left and right incisors

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Rom, Curt R., and Bruce Barritt. "Spur Development of `Delicious' Apple as Influenced by Position, Wood Age, Strain, and Pruning." HortScience 25, no. 12 (1990): 1578–81. http://dx.doi.org/10.21273/hortsci.25.12.1578.

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The role of spur leaves in bud and fruit development on two spur-type `Delicious' apple strains (Malus domestica Borkh.) and factors affecting spur development were studied. Reducing spur leaf area on vegetative spurs in August reduced the number of spurs that flowered the following year but did not affect flower size. On spurs that did flower, leaf area reduction the previous year did not influence leaf number or area, but the bourse shoot leaf area was reduced. Spur bud diameter, leaf area, size, specific leaf weight (SLW), and leaf dry weight were larger on 2-year-old vegetative spurs than

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Tubbs, R. Shane, Paul Grabb, Alan Spooner, Wally Wilson, and W. Jerry Oakes. "The apical ligament: anatomy and functional significance." Journal of Neurosurgery: Spine 92, no. 2 (2000): 197–200. http://dx.doi.org/10.3171/spi.2000.92.2.0197.

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Object. The authors conducted a study to describe the detailed anatomy of the apical ligament and to acknowledge or refute its historical description as a functionally significant contributor to craniocervical stability. Methods. In 20 adult human cadavers measurements of the apical ligament were obtained, and its detailed anatomy was observed. Ranges of motion were also assessed to discern the function of the apical ligament. Conclusions. Results of the study support the concept that the apical ligament is best described as a vestigial structure that offers no significant added stability to t

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Panainte, Irinel, Claudia –. Georgeta Grancea, Valentina –. Tamara Zamfir – Buta, and Mariana Pacurar. "Apical Root Resorption After Orthodontic Treatment." European Scientific Journal, ESJ 12, no. 24 (2016): 43. http://dx.doi.org/10.19044/esj.2016.v12n24p43.

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Aim of the studyː to find if apical root resorption is related to orthodontic treatment time, type of appliance used and which are the most susceptible teeth to develop this type of resorption. Material and methodsː 70 patients (27 males and 43 females) selected from patients reffered for an orthodontic treatment at the Orthodontic Department of Faculty of Dentistry, University of Medicine and Pharmacy from TirguMures. The mean age at the beginning of treatment was 15.11 years for males and 14.67 years for females subjects. At the end of treatment, on their panormaic radiographs it was measure

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Alkhalidi, Emad Farhan, and Zena A. Ahmad. "Bond Strength of New Fiber Post-system (Rebilda GT)." Open Access Macedonian Journal of Medical Sciences 10, no. D (2022): 347–51. http://dx.doi.org/10.3889/oamjms.2022.10174.

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AIM: The aim of this in vitro study is to determine the push-out bond strength of bundle glass fiber post (Rebilda GT) and tapered glass fiber post (Rebilda fiber post). MATERIALS AND METHODS: Twenty freshly extracted human single rooted premolar teeth were used, all teeth were endodontically treated, after 24 h from obturation the gutta-percha removed leaving 5 mm apically to ensure clinically acceptable apical seal. Finally, all canals were flushed with 2 ml NaOcl 5.25% and 2 ml distilled water, respectively, then the canals were dried using paper points. The roots were divided randomly into

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Wiguna, Stephanie, Risti Saptarini Primarti, and Iwan Ahmad Musnamirwan. "<p>Efektifitas quad-helix dalam perawatan defisiensi transversal maksila pada anak<p></p>Effectiveness of quad-helix for transverse maxillary deficiency treatment in children<p>." Jurnal Kedokteran Gigi Universitas Padjadjaran 33, no. 3 (2021): 180. http://dx.doi.org/10.24198/jkg.v33i3.27967.

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Pendahuluan: Periodontitis apikalis adalah peradangan dan kerusakan jaringan pada daerah apikal jaringan periodonsium. Terjadi akibat pulpa nekrosis mengalami perluasan infeksi dari bakteri saluran akar menuju apeks gigi. Penelitian terdahulu membuktikan bahwa periodontitis apikalis dapat dikaitkan dengan peningkatan kadar interleukin-6. Interleukin-6 adalah salah satu sitokin pro-inflamatori yang mempunyai peran penting dalam respon inflamasi. Tujuan penelitian menganalisis perbedaan kadar interleukin-6 dalam darah vena antara pasien dengan periodontitis apikalis dan pasien tanpa periodontiti

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Jafarzadeh, Hamid, Zahed Mohammadi, Sousan Shalavi, and Jun-Ichiro Kinoshita. "Establishing Apical Patency: To be or not to be?" Journal of Contemporary Dental Practice 18, no. 4 (2017): 326–29. http://dx.doi.org/10.5005/jp-journals-10024-2040.

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ABSTRACT Introduction The apical portion of the root canal is very complex and challenging during endodontic treatment. Root canal preparation and obturation to the apical constriction may provide the best prognosis. Incomplete debridement, foramen transportation, and inadequate seal in the apical portion are considered to be responsible for treatment failure. The technique “apical patency” is considered as a way for maintaining the apical part the free of the debris by recapitulation, using a small K-file through the area of the apical foramen. This term was firstly proposed by Buchanan. In t

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Langer, Rebecca C., Rhian E. Hayward, Takafumi Tsuboi, Mayumi Tachibana, Motomi Torii, and Joseph M. Vinetz. "Micronemal Transport of Plasmodium Ookinete Chitinases to the Electron-Dense Area of the Apical Complex for Extracellular Secretion." Infection and Immunity 68, no. 11 (2000): 6461–65. http://dx.doi.org/10.1128/iai.68.11.6461-6465.2000.

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ABSTRACT Plasmodium ookinetes secrete chitinases to penetrate the acellular, chitin-containing peritrophic matrix of the mosquito midgut en route to invasion of the epithelium. Chitinases are potentially targets that can be used to block malaria transmission. We demonstrate here that chitinases of Plasmodium falciparumand P. gallinaceum are concentrated at the apical end of ookinetes. The chitinase PgCHT1 of P. gallinaceum is present within ookinete micronemes and subsequently becomes localized in the electron-dense area of the apical complex. These observations suggest a pathway by which ooki

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Stefopoulos, Spyridon, Giorgos N. Tzanetakis, and Evangelos G. Kontakiotis. "Non-surgical retreatment of a failed apicoectomy without retrofilling using white mineral trioxide aggregate as an apical barrier." Brazilian Dental Journal 23, no. 2 (2012): 167–71. http://dx.doi.org/10.1590/s0103-64402012000200013.

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Root-end resected teeth with persistent apical periodontitis are usually retreated surgically or a combination of non-surgical and surgical retreatment is employed. However, patients are sometimes unwilling to be subjected to a second surgical procedure. The apical barrier technique that is used for apical closure of immature teeth with necrotic pulps may be an alternative to non-surgically retreat a failed apicoectomy. Mineral trioxide aggregate (MTA) has become the material of choice in such cases because of its excellent biocompatibility, sealing ability and osseoinductive properties. This

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