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Готові списки джерел за темами / Canal Deviation / Статті в журналах

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Статті в журналах з теми "Canal Deviation"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

Jamleh, Ahmed, Hajar Albanyan, Ali Alaqla, et al. "Impact of cooling on shaping ability of thermally treated files in canal models with double curvature." PeerJ 11 (August 8, 2023): e15830. http://dx.doi.org/10.7717/peerj.15830.

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Анотація:

Background This study compared the ability of thermally treated files in shaping simulated canals with double curvature. Fifty-six canals were enlarged to a final size of 25 with ProTaper Next (PTN) or ZenFlex (ZF). Materials Half of the samples were shaped with cooled files (n = 14 each). The amount of removed resin was measured and canal deviation was determined at eight levels. Shaping time and maximum shaping torque values were also recorded. Data were statistically analyzed using analysis of variance and LSD, Kruskal–Wallis, and chi-square tests at a 0.05 significance level. Results Compa

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2

Das, Panna, Mohammad Ali Asgor Moral, A. K. M. Bashar, Samir Banik, Shuvendu Saha, and Mozammal Hossain. "Deviation of Root Canal Curvature Using Three Types of Rotary Instruments: An In Vitro Study." European Journal of Dental and Oral Health 5, no. 2 (2024): 19–23. http://dx.doi.org/10.24018/ejdent.2024.5.2.326.

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One of the essential requirements for a successful endodontic treatment is efficient cleaning and shaping. Since its introduction, the nickel-titanium rotary system has gained popularity due to its elasticity and suppleness in the creation of curved root canals. To assess the deviation in root canal curvature in severely curved root canals following three different rotary file system preparations. Thirty-six human permanent mandibular first molars were chosen and stored in regular saline after being newly extracted with the curve mesial root. To standardize length at 13 mm, the mesial roots we

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3

Kong, Lei, Wang, Long, Lu, and Yang. "A Model Predictive Water-Level Difference Control Method for Automatic Control of Irrigation Canals." Water 11, no. 4 (2019): 762. http://dx.doi.org/10.3390/w11040762.

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In this paper, automatic control of the water level in an irrigation canal by automatic regulation of intermediate gates was studied. Previous scholars have proposed a water level difference control strategy that works to keep relative deviations in all pools the same for a particular situation where the operator does not have full control over the canal inflow, with the centralized linear quadratic regulator (LQR) control method used. While in practice, the deviation tolerance of pools may differ in some canals which limits the applicability of the control strategy. In this work, a weight coe

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4

Nayak, Ankit, Prashant K. Jain, PK Kankar, and Niharika Jain. "Computer-aided design–based guided endodontic: A novel approach for root canal access cavity preparation." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 232, no. 8 (2018): 787–95. http://dx.doi.org/10.1177/0954411918788104.

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In cases of teeth with unusual morphology like calcified pulp canal, guided endodontic treatment is suggested. An endodontic guide which navigates burs according to a preplanned path is used. Existing approaches of endodontic guide design are based on visual observation and analysis of tomographic scan of teeth. Hence, they are time-consuming and expert-dependent. Computer-aided design–based methodology was employed to design and fabricate a customized endodontic guide. A cone beam computed tomographic scan with MIMICS software was used to create a solid model of the teeth. The solid model gen

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5

DONAHUE, S. P. "Posterior canal predominance in bilateral skew deviation." British Journal of Ophthalmology 85, no. 11 (2001): 1394c—1394. http://dx.doi.org/10.1136/bjo.85.11.1394c.

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6

Zhang, Ting, Du Chen, Fei Zhang, et al. "Comparison of selective laser melting and stereolithography etching templates for guided endodontics." PeerJ 12 (July 23, 2024): e17646. http://dx.doi.org/10.7717/peerj.17646.

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Background With the increasing application of guided endodontics to treat complex root canal treatment, the entire process of root canal treatment has become more precise, reducing damage to tooth structure and improving success rates. However, due to the limitations of the operating space, the use of guided endodontic templates in posterior root canal treatment is less common. This study aims to compare the accuracy and reliability of selective laser melting (SLM) and traditional stereolithography etching (SLA) guided endodontic templates for posterior root canals, providing better treatment

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7

Sharawy, Wael Waheed, and Wael Hamdy El Shater. "Shaping Ability of Protaper Gold and Protaper Ultimate in Simulated Root Canals: A Comparative Study." Scholars Journal of Dental Sciences 10, no. 1 (2023): 12–19. http://dx.doi.org/10.36347/sjds.2023.v10i01.003.

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This study aimed to compare the shaping ability of ProTaper Gold (PTG) and the newly developed ProTaper Ultimate (PTU) systems in artificial S-shaped canals. Both files are manufactured via gold thermal treatment methods and have variable taper along their working part. Thirty-Two S-shaped canals in clear resin blocks were prepared up to an apical size of 25 using PTU and PTG instruments (n = 16 canals/group). Resin blocks were filled with ink and photographed before & after instrumentation to develop composite images by superimposition. The amount of removed resin was measured perpendicul

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8

Santos, Mariana Diniz Bisi dos, Marília Fagury Marceliano, and Patrícia Rodrigues de Almeida Silva e. Souza. "Evaluation of apical deviation in root canals instrumented with K3 and ProTaper systems." Journal of Applied Oral Science 14, no. 6 (2006): 460–64. http://dx.doi.org/10.1590/s1678-77572006000600013.

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OBJECTIVES: this study evaluated the apical deviation of curved root canals instrumented with K3 and ProTaper systems. MATERIAL AND METHODS: twenty root canals of human maxillary and mandibular first molars were employed, which were divided into 2 groups: group A (10 teeth) was instrumented with the K3 system, and group B (10 teeth) with the ProTaper system. Evaluation of deviation was performed by double radiographic exposure. Radiographs were achieved before and after instrumentation, with 0.3-second, thus allowing superimposition of images. Three-dimensional computerized tomograph was perfo

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9

Nuchhi, Ashwini Bala Saheb, Sandhya Vikas Yatagiri, Veena Srinivas Harwalkar, and Ravi Siddanagouda Bulagouda. "Morphometric and morphological analysis of the optic canal in adult human cadavers and dry skulls." Current Medicine Research and Practice 15, no. 3 (2025): 95–99. https://doi.org/10.4103/cmrp.cmrp_59_25.

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Background: The optic canal, which connects the middle cranial fossa to the orbit, houses critical neurovascular structures. Its morphometric and morphological characteristics are essential for neurosurgical planning and anthropological studies. Aims: The objective of the study is to analyse the optic canal in adult human cadavers and compare findings with dry skulls, focusing on gender differences and anatomical variations. Materials and Methods: This osteological study included 26 cadavers and 112 dry adult human skulls. Measurements, recorded in millimetres using digital Vernier callipers,

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10

Bonet, Enrique, Beniamino Russo, Ricard González, Maria Teresa Yubero, Manuel Gómez, and Martí Sánchez-Juny. "The FC Algorithm to Estimate the Manning’s Roughness Coefficients of Irrigation Canals." Agriculture 13, no. 7 (2023): 1351. http://dx.doi.org/10.3390/agriculture13071351.

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Freshwater scarcity has driven the integration of technological advancements and automation systems in agriculture in order to attempt to improve water-use efficiency. For irrigation canals, water-use efficiency is, in great measure, limited by the performance of management systems responsible for controlling the flow and delivering water to the farmers. Recent studies show a significant sensitivity of the results obtained from irrigation canal control algorithms with respect to the Manning’s roughness coefficient value, thus, highlighting the importance of its correct estimation to ensure an

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11

Sunjoto, S. "Infiltration on Canal as a Method for Recharging Groundwater Storage." Asian Journal of Water, Environment and Pollution 5, no. 4 (2008): 1–8. http://dx.doi.org/10.3233/ajw-2008-5_4_01.

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Water losses in a designed irrigation area for paddy fields is necessary to be examined. Water losses in conveyance canal consists of evaporation and infiltration. The infiltrating water becomes groundwater storage and is distributed along the canal. Semi-empiric equation of infiltration on canal was developed by Moritz (1913) and the semi-graphic equation was developed by Bouwer (1965). Forchheimer (1930) has developed a formula based on dynamic balance of water flow to calculate the permeability coefficient value of soils and was continued by Dachler (1936) and Sunjoto (2002) that computed t

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12

Keleş, Ali, and Cangül Keskin. "Quantitative Analysis of the Anatomy of Mesial Roots of Mandibular First Molars with Vertucci Type I Root Canal Configuration by Means of Micro-Computed Tomography." International Dental Research 10, no. 1 (2020): 17–21. http://dx.doi.org/10.5577/intdentres.2020.vol10.no1.4.

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Aim: This study aimed to evaluate root canal morphology of Vertucci type I root canal configuration detected in mesial roots of mandibular first molar teeth using micro-computed tomography (Micro-CT). Methodology: Micro-CT datasets of 269 specimens were evaluated for the detection of specimens with Vertucci type I root canal configuration for further analysis. Major and minor diameter, area, perimeter and roundness of root canal cross-sections at the beginning and midline of each root thirds were measured and recorded. The presence of apical delta, accessory canals, and deviation of majo

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13

Sandra Maria Alves SAYÃO MAIA, Ana Paula Peres COSTA, Ana Tereza de Albuquerque LEMOS, Valeska Rodrigues Jacob TORRÃO, and Ana Virginia Silva VILELA. "Study of foramen openings and their concurrence with root apexes." RSBO 2, no. 1 (2006): 7–11. http://dx.doi.org/10.21726/rsbo.v2i1.1326.

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Анотація:

The present study is aimed at evaluating the anatomic concurrencebetween foramen openings and root apexes of 247 upper and lowerpermanent human molar canals, the distance between these structures,the instrument that best fits into the root canal, as well as the directionof foramen deviation. Sixty-four of the canals were partiallyimpenetrable and were discarded. The findings showed that 39.9% ofthe root canals studied had their apical foramen concurrent with theirroot apexes and 60.1% did not. Clinicians must be made aware of thisimportant anatomical detail, which could be indispensable forsuc

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14

Borges, João Henrique Sousa Melo, Fabíola Bastos de Carvalho, Maria Cristina Teixeira Cangussu, Ove Andreas Peters, Maria Guiomar de Azevedo Bahia, and Érika Sales Joviano Pereira. "Accuracy of an Endodontic Rotary Motor with Integrated Apex Locator to Determine the Root Canal Length." Arquivos em Odontologia 59 (November 30, 2023): 106–13. http://dx.doi.org/10.35699/2178-1990.2023.45739.

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Aim: The purpose of this study was to evaluate the efficacy to determine the root canal length, in vitro, of both the electronic apex locator (M2) and the autostop (AS - M3) functions of the Endus Duo Gnatus endodontic motor (Gnatus, São Paulo, SP, Brazil). Methods: Thirty extracted human single-rooted premolars had their root canal lengths (TLs) up to the apical foramen determined using the Endus Duo Gnatus in two ways: (1) In the stainless steel (SS) control group, the measurement was obtained using a stainless steel hand instrument with the electronic locator mode (M2 function) connected to

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15

Santos, Suelleng Maria Cunha, Janir Alves Soares, Carlos Augusto Santos César, Manoel Brito-Júnior, Allyson Nogueira Moreira, and Cláudia Silami de Magalhães. "Radiographic quality of root canal fillings performed in a postgraduate program in endodontics." Brazilian Dental Journal 21, no. 4 (2010): 315–21. http://dx.doi.org/10.1590/s0103-64402010000400005.

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The aim of this study was to evaluate the standard quality of 1,347 root fillings performed by postgraduate students in Endodontics according to 3 radiographic quality parameters. The analyzed quality parameters included apical extension (AE), taper (TA) and homogeneity (HO), which received scores S2 (ideal standard), S1 (slight deviation) or S0 (accentuated deviation). A perfect filling (PF) received S2 for all parameters. In the absence of one or two S2 score, the fillings were deemed as satisfactory (SF) or deficient (DF), respectively. The results showed 51.7%, 41.5% and 6.8% of PF, SF, an

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16

Gong, Yi, Wenhao Zou, Xiuwei Yuan, Xiaoling Yang, and Yongfeng Chen. "Study on Water Quantity Allocation Optimization for Single Main Canal in Large-Scale Irrigation Area Based on DP Method." Water 14, no. 23 (2022): 3917. http://dx.doi.org/10.3390/w14233917.

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The mathematical model of optimal water quantity allocation for a single main canal in a large-scale irrigation area was constructed that took the minimal sum of the squared deviation of water shortage for water receiving areas controlled by the single main canal in one given irrigation period as the study target, and the total irrigation quantity of the single main canal as a constraint condition. Taking the optimal allocation of water quantity of each branch canal as decision variables, and several branch canals under the irrigation sequence of the main canal as a state variable, this model

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17

Rymsh, L. "Towards the doctrine of the normal and narrow pelvis of the Russian woman." Journal of obstetrics and women's diseases 6, no. 7-8 (2020): 718–56. http://dx.doi.org/10.17816/jowd67-8718-756.

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If you follow closely the course of the birth act consistently in many women in labor and you are critical of each deviation from the normal course, you cannot fail to notice that most of these deviations are more or less closely related to the spatial discrepancy between the capacity of the pelvic canal and the head of the fetus.

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18

FATHIMA, Ayesha S., Sahana SELVAGANESH, Ganesh JEEVANANDAN, et al. "Endodontic management of dens invaginatus using dynamic navigation system in pediatric patient: A case report." International Arab Journal of Dentistry 16, no. 1 (2025): 156–63. https://doi.org/10.70174/iajd.v16i1.1402.

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Dens invaginatus, also known as dens in dente, is a dental anomaly resulting from infolding of the enamel organ into the dental papilla. Dynamic Navigation Systems (DNS), like Navident, offer real-time guidance during endodontic procedures, proving especially useful in complex cases, such as calcified canals or pulp obliteration. This case report presents a 13-year-old female who reported the chief complaint of continuous pain in the upper left front tooth region. Based on the clinical and radiographic findings, a diagnosis of pulp necrosis and chronic periapical abscess in relation to maxilla

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19

Oget, Diane, Julien Braux, Céline Compas, and Martine Guigand. "Comparative analysis of root canal changes after preparation with three systems using Cone-Beam Computed Tomography." Giornale Italiano di Endodonzia 31, no. 2 (2017): 83–88. http://dx.doi.org/10.4081/j.gien.2017.24.

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Introduction: The aim of this study was to investigate the morphological changes in the root canal trajectory on extracted teeth after preparation with Endoflare/Revo-S1, Endoflare/ HeroShaper1 and ProTaper1 using Cone-Beam Computed Tomography (CBCT). Methods: 39 root canals with similar curvatures were divided into three homogeneous groups (n = 13). Root canals in Group 1 were shaped with Endoflare/Revo-S1; Group 2 with Endoflare/ Hero Shaper1, and Group 3 with ProTaper1. All specimens were scanned pre- and postoperatively using the Kodak1 9000C 3D imaging system. Changes in both degree and p

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20

Ferreira, Maria Claudia H., Alexandre R. Freire, Beatriz C. Ferreira-Pileggi, Felippe B. Prado, and Ana Cláudia Rossi. "Morphological study of the pterygoid canal in computed tomography scans of a population from Southeast Brazil." European Journal of Anatomy 29, no. 3 (2025): 313–22. https://doi.org/10.52083/nymu6240.

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The aim of this study was to evaluate the morphology of the pterygoid canal in computed tomography (CT) scans of a southeastern Brazilian population. One hundred CT scans were evaluated, 58 from male skulls and 42 from female skulls. The Mimics 18.0 software (Materialise, NV, Belgium) was used for segmentation of the images from each CT scan in the region corresponding to the sphenoid bone and the pterygopalatine fossa. After segmentation, volume (mm3) and length (mm) were obtained using a specific tool. The types of pterygoid canals were analyzed according to the following criteria: type 1 (p

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21

Haarmann, Benjamin, Wadim Leontiev, Eva Magni, et al. "Accuracy of Guided Endodontics in Posterior Teeth." Applied Sciences 13, no. 4 (2023): 2321. http://dx.doi.org/10.3390/app13042321.

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The purpose of this ex vivo study was to determine the accuracy of template-based guided endodontics for access cavity preparation and root canal detection in posterior teeth. First, three maxillary and four mandibular models were constructed using 67 premolars and molars, with a total number of 135 main root canals. Cone beam computed tomography (CBCT) and three-dimensional 3D surface scans of each model were performed and matched in order to plan access cavity preparation and design templates virtually. Template-guided access cavity preparation was then performed for each tooth, followed by

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22

Tiago André Fontoura de Melo, Luciana Dellinghausen Silveira, Vanessa Santos Simões Pires, Simone Viegas da Silva, and Luis Eduardo Duarte Irala. "Influence of root curvature’s initial position on apical deviation occurrence after oscillatory preparation in simulated root canals." RSBO 8, no. 4 (2012): 410–6. http://dx.doi.org/10.21726/rsbo.v8i4.1091.

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Introduction and objective: This study aimed to analyze the influence of root curvature’s initial position on apical deviation occurrence after oscillatory system preparation. Material and methods: For this purpose, we used twenty simulated root canals with 21 mm length and 30 degree angle, which were divided into two experimental groups according to curvature’s initial position: 8 mm (group A) and 12 mm (group B) short of the canal orifice. The canals were prepared using crown-down technique, and memory instrument was size #30. For apical deviation analysis, before and after preparation, cana

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23

Hawi, Nadine, Eugenio Pedullà, Giusy Rita Maria La Rosa, Gianluca Conte, Walid Nehme, and Prasanna Neelakantan. "Influence of Coronal Flaring on the Shaping Ability of Two Heat-Treated Nickel-Titanium Endodontic Files: A Micro-Computed Tomographic Study." Journal of Clinical Medicine 12, no. 1 (2023): 357. http://dx.doi.org/10.3390/jcm12010357.

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Nickel-titanium (NiTi) usage is associated in endodontics with some complications including canal transportation. Centering ability of a NiTi file is the ability to stay centered in the root canal system during instrumentation. Any undesirable deviation from the natural canal path is indicated as canal transportation. A possible strategy to improve the centering ability of NiTi instruments is the pre-enlargement of the coronal third of the root canal to minimize coronal interferences. This procedure is known as coronal flaring. The aim of this study was to perform a micro-computed tomographic

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24

Lebrun, Renaud, Alexandre Perier, Judith Masters, Laurent Marivaux, and Sébastien Couette. "Lower Levels of Vestibular Developmental Stability in Slow-Moving than Fast-Moving Primates." Symmetry 13, no. 12 (2021): 2305. http://dx.doi.org/10.3390/sym13122305.

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The vestibular system of the mammalian inner ear senses angular and linear velocity of the head and enables animals to maintain their balance. Vestibular anatomy has been studied extensively in order to link its structure to particular kinds of locomotion. Available evidence indicates that, in primates, slow-moving species show higher levels of vestibular variation than fast-moving taxa. We analysed intraspecific morphological variation and fluctuating asymmetry (FA) levels in the semicircular canal systems of six species of lorisiform primates: three slow-moving lorisids and three fast-moving

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25

Vicko, Kristina, Jelena Nikolic-Ivosevic, and Bojan Petrovic. "Evaluation of odontometric methods in immature permanent teeth: Research for a better practise." Vojnosanitetski pregled 76, no. 1 (2019): 19–23. http://dx.doi.org/10.2298/vsp160526057v.

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Background/Aim. Determination of correct working length is one of the keys to success in root canal treatment. It provides efficient canal cleaning and shaping, a three-dimensional chermetic obturation and an optimal healing procees following root apex formation. The aim of this work was to evaluate and compare the accuracy and applicability of working lengths determined in permanent immature teeth in vivo using different clinical methods. Methods. The research was conducted at the Dental Clinic of Vojvodina in Novi Sad, the Department of Pediatric and Preventive Dentistry. A sample of 30 cana

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26

Memon, Mahwish, Feroze Ali Kalhoro, Salman Shams, and Suneel Kumar. "ROOT CANAL DENTIN;." Professional Medical Journal 24, no. 01 (2017): 166–70. http://dx.doi.org/10.29309/tpmj/2017.24.01.415.

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Objectives: To compare the mean thickness of hybrid layer by using selfetchadhesive at coronal dentin and root canal dentin with scanning electronic microscope.Study Design: Experimental study. Setting: Liaquat University of Medical & Health Sciences,Jamshoro. Period: July 2009 to 31st December 2009. Material & Methods: Fifty permanentsingle rooted extracted teeth were used in this study. The sample size was divided into twoequal groups of 25 teeth each. Group 1(n=25) self etch adhesive was applied on coronal dentinthen light cured for 10seconds. Group 2(n=25)self etch adhesive to root

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27

Abur, Defne, Nicholas J. Horton, and Susan E. Voss. "Intrasubject Variability in Power Reflectance." Journal of the American Academy of Audiology 25, no. 05 (2014): 441–48. http://dx.doi.org/10.3766/jaaa.25.5.3.

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Background: Power reflectance measurements are an active area of research related to the development of noninvasive middle-ear assessment methods. There are limited data related to test-retest measures of power reflectance. Purpose: This study investigates test-retest features of power reflectance, including comparisons of intrasubject versus intersubject variability and how ear-canal measurement location affects measurements. Research Design: Repeated measurements of power reflectance were made at about weekly intervals. The subjects returned for four to eight sessions. Measurements were made

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28

BRUSCHI, Jaqueline, Luiza Bonezi BOFF, and Tiago André Fontoura de MELO. "Analysis of cutting capacity, preparation time, and apical deviation after instrumentation of artificial curved canals with the waveone ® and reciproc ® reciprocating systems." RGO - Revista Gaúcha de Odontologia 65, no. 3 (2017): 191–95. http://dx.doi.org/10.1590/1981-863720170002000013216.

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ABSTRACT Objective To analyze cutting capacity, preparation time, and occurrence of apical deviation, after instrumentation of curved canals with reciprocating Primary WaveOne ® and R25 Reciproc ® systems. Methods Twenty simulated canals with 35° bends were randomly assigned to the Primary WaveOne ® or R25 Reciproc ® . The preparations were made by a single operator. The cutting capacity was assessed by the difference in weight (on an analytical balance) of the canals before and after preparation. The time needed for the preparation was analyzed. The canals were filled with India ink and photo

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29

Saad, Abdelhamied Yousef, Farah T. Baraktat, and Mohamed I. Attia. "Comparative analysis of the efficiency of the Broken Tool Remover-Pen versus Zumax kit in the removal of fractured NiTi files from the root canal system. An in vitro study." Saudi Endodontic Journal 14, no. 3 (2024): 348–55. http://dx.doi.org/10.4103/sej.sej_33_24.

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Abstract Introduction: Removal of a broken instrument may result in excessive dentin destruction and eventual tooth extraction. Therefore, the aim of this study is to evaluate the success of the Broken Tool Remover (BTR)-Pen system versus the Zumax kit in the retrieval of separated rotary files from the root canals, root canal volume changes, and retrieval time. Materials and Methods: Forty mandibular first molars were used in this investigation. Mesiobuccal canals were instrumented by ProTaper Next Rotary System up to a standard apical size 20/40 taper. Five mm of X2 file size 25/60 taper was

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Damasceno, Ingrid Barros da Costa, João Pedro de Mello Dutra Magalhães, Paulo Henrique dos Santos Belo Júnior, et al. "USE OF GUIDED ENDODONTICS IN TREATING TEETH WITH PULP OBLITERATION DUE TO CALCIFICATION AND THE RELEVANCE OF CLINICAL SCRUTINY IN DECISION MAKING: A CLINICAL CASE REPORT." ARACÊ 7, no. 5 (2025): 22714–25. https://doi.org/10.56238/arev7n5-109.

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Endodontic treatment of teeth with pulp canal obliteration (PCO) represents a procedure of higher complexity, as it requires the professional to have precise control over access direction, considering that essential references are lost. This difficulty becomes even more critical when the PCO extends to the apical third of the tooth. In such cases, a relatively recent alternative emerges as a viable option that facilitates and provides greater control over the procedure: guided endodontics. In this process, surgical guides are designed using scans of the arch and high-resolution tomography scan

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Yadav, Hemant Kumar, A. P. Tikku, Anil Chandra, Rakesh Kumar Yadav, and Devendra Kumar Patel. "Efficacy of etidronic acid, BioPure MTAD and SmearClear in removing calcium ions from the root canal: An in vitro study." European Journal of Dentistry 09, no. 04 (2015): 523–28. http://dx.doi.org/10.4103/1305-7456.172613.

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ABSTRACT Objective: The purpose of this study was to quantify the amount of calcium ions removed from the root canal by etidronic acid (HEBP), BioPure MTAD, and SmearClear using atomic absorption spectrophotometer. Materials and Methods: Fifty (n = 50) freshly extracted human mandibular premolar teeth were collected and decoronated at the cementoenamel junction. The canals were prepared in a crown down fashion using the rotary system and copiously irrigated with 1.0% sodium hypochlorite. All specimens were rinsed with the deionized water. Based on the type of chelating agent used, the samples

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Murnane, Owen, Heather Mabrey, Amber Pearson, Stephanie Byrd, and Faith Akin. "Normative Data and Test-Retest Reliability of the SYNAPSYS Video Head Impulse Test." Journal of the American Academy of Audiology 25, no. 03 (2014): 244–52. http://dx.doi.org/10.3766/jaaa.25.3.3.

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Background: The observation or measurement of eye movement can aid in the detection and localization of vestibular pathology due to the relationship between the function of the vestibular sensory receptors in the inner ear and the eye movements produced by the vestibulo-ocular reflex (VOR). The majority of bedside and laboratory tests of vestibular function involve the observation or measurement of horizontal eye movements (i.e., horizontal VOR) produced by stimuli that activate the horizontal semicircular canals (SCCs) and the superior vestibular nerve. The video head impulse test (vHIT) is a

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Souza, Bianca Katsumata de, Murilo Priori Alcalde, Marco Antonio Hungaro Duarte, Maria Aparecida Andrade Moreira Machado, Thais Marchini Oliveira, and Natalino Lourenço Neto. "Shaping ability of a pediatric motor-driven instrumentation system in primary molar root canal prototypes." Brazilian Dental Journal 34, no. 5 (2023): 36–42. http://dx.doi.org/10.1590/0103-6440202305372.

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Abstract Evaluate the shaping ability and preparation time using a pediatric motor-driven rotary instrumentation compared to other systems in resin prototypes of primary molars. Methods: Thirty specimens were scanned in micro-CT and divided into three groups according to the instrumentation type: pediatric motor-driven Sequence baby File (SBF); conventional motor-driven (Sequence Rotary File - SRF); manual K file. Instrumentation time was timed. After preparation, the specimens were scanned again. The pre- and post-instrumentation images were superimposed to measure the amount of root canal de

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Karimnejad, K., M. S. Czerny, S. Lookabaugh, D. J. Lee, and A. A. Mikulec. "Gender and laterality in semicircular canal dehiscence syndrome." Journal of Laryngology & Otology 130, no. 8 (2016): 712–16. http://dx.doi.org/10.1017/s0022215116008185.

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AbstractObjective:To determine if there is gender or laterality predilection in patients with semicircular canal dehiscence syndrome.Methods:A multi-institutional chart review was performed to identify patients diagnosed with semicircular canal dehiscence between 2000 and 2015. A systematic literature search was conducted using PubMed to further identify patients with semicircular canal dehiscence. Age, gender and laterality data were collected. Statistical analysis was performed to evaluate for gender or laterality preponderance.Results:A total of 682 patients with semicircular canal dehiscen

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Xia, Yuanxin, Zhihan Guo, Elisabet Tiana-Roig, Vicente Cutanda Henriquez, and Frieder Lucklum. "Effect of curvature on sound propagation in the ear canal." Journal of the Acoustical Society of America 155, no. 1 (2024): 695–706. http://dx.doi.org/10.1121/10.0024495.

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In this paper, we investigate the effect of the curvature and torsion of the ear canal on its resonance through a comparison between several ear canal models. Utilizing Stinson's ear canal geometries as a reference, we build and analyze several ear canal models using both transmission matrix and numerical methods for the purpose of comparative assessment. A conical transmission unit, which considers visco-thermal effects, is employed for the modeling of the human ear canal. While the transfer matrix and numerical method agree well for a straight axis model, this simplification results in up to

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Chen, Mo, Jiacan Wang, Jing Sun, Fang Ye, and Hongyan Zhang. "Spatio-Temporal Distribution Characteristics of Intangible Cultural Heritage and Tourism Response in the Beijing–Hangzhou Grand Canal Basin in China." Sustainability 15, no. 13 (2023): 10348. http://dx.doi.org/10.3390/su151310348.

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The Beijing–Hangzhou Grand Canal is renowned for being one of the longest and largest canals in the world. Running from Beijing to Hangzhou (north to south), it connects China’s five major water systems and has an important impact on the ecological environment and economy of northern and southern China. It also boasts a large quantity of intangible cultural heritage (ICH). Clarifying the spatio-temporal distribution pattern of ICH in the Beijing–Hangzhou Grand Canal Basin and its influencing factors is essential for the protection and utilization of heritage resources and the formulation of ma

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Maki, Keiichiro, Arata Ebihara, Hayate Unno, et al. "Effect of Different Downward Loads on Canal Centering Ability, Vertical Force, and Torque Generation during Nickel–Titanium Rotary Instrumentation." Materials 15, no. 8 (2022): 2724. http://dx.doi.org/10.3390/ma15082724.

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This study aimed to examine how downward loads influence the torque/force and shaping outcome of ProTaper NEXT (PTN) rotary instrumentation. PTN X1, X2, and X3 were used to prepare J-shaped resin canals employing a load-controlled automated instrumentation and torque/force measuring device. Depending on the torque values, the handpiece was programmed to move as follows: up and down; downward at a preset downward load of 1 N, 2 N or 3 N (Group 1N, 2N, and 3N, respectively; each n = 10); or upward. The torque/force values and instrumentation time were recorded, and the canal centering ratio was

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Chaudhary, Govind Kumar, and Sanjeeb Chaudhary. "ENDODONTIC MANAGEMENT OF CALCIFIC METAMORPHOSIS IN MAXILLARY CENTRAL INCISOR: A CASE REPORT." Journal of Chitwan Medical College 12, no. 2 (2022): 147–50. http://dx.doi.org/10.54530/jcmc.643.

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Calcific metamorphosis is a pulpal reaction to dental trauma where the root canal gets obliterated by the deposition of hard tissue within the root canal space. Calcified root canal possesses a great challenge to the endodontist as negotiating such canal is very much difficult and tiring job along with risk of iatrogenic root perforation. Negotiation of root canal during endodontic treatment is very much crucial for its success as it could affect the cleaning, shaping, disinfection and finally 3 dimensional obturation of the root canal. This case report demonstrates the clinical management of

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Saberi, Eshagh Ali, Narges Farhad Mollashahi, and Forugh Farahi. "Canal transportation caused by one single-file and two multiple-file rotary systems: A comparative study using cone-beam computed tomography." Giornale Italiano di Endodonzia 32, no. 2 (2019): 57–62. http://dx.doi.org/10.4081/j.gien.2018.3.

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Aim: This ex-vivo study aimed to compare canal transportation in mesio-buccal canal of mandibular first molars prepared with Mtwo and Revo-S multi-file and Neoniti single-file nickel[18TD$DIF]—titanium (Ni—Ti) rotary systems using cone-beam computed tomography (CBCT). Methodology: CBCTscans were obtained from 60 extracted mandibular first molars and the teeth were randomly divided into three groups. Mesio-buccal canal of mesial root was prepared with Revo-S, Neoniti or Mtwo rotary systems according to the instructions of the manufacturers. Postoperative CBCT scans were also obtained. A single

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Shrestha, Iju. "Mean Canal-body Ratio among Specimens of Dried Lumbar Vertebrae in the Department of Anatomy of a Medical College: A Descriptive Cross-sectional Study." Journal of Nepal Medical Association 60, no. 248 (2022): 389–92. http://dx.doi.org/10.31729/jnma.7328.

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Introduction: Lumbar spinal canal stenosis is assumed to be one of the chief causative factors for low back pain. The measurement of lumbar canal and body dimensions has thus become an important tool for the diagnosis and treatment of spinal stenosis. This study aims to find out the mean canal-body ratio among specimens of dried lumbar vertebrae in a medical college. Methods: A descriptive cross-sectional study was done in a medical college from May, 2021 to July, 2021. Ethical clearance was taken from the Institutional Review Committee (Reference number: 0502202103) and whole sampling was don

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Casadei, Bruna de Athayde, Sônia T. de O. Lara‐Mendes, Camila de Freitas M. Barbosa, et al. "Access to original canal trajectory after deviation and perforation with guided endodontic assistance." Australian Endodontic Journal 46, no. 1 (2019): 101–6. http://dx.doi.org/10.1111/aej.12360.

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Omori, Satoshi, Arata Ebihara, Keiko Hirano, et al. "Effect of Rotational Modes on Torque/Force Generation and Canal Centering Ability during Rotary Root Canal Instrumentation with Differently Heat-Treated Nickel–Titanium Instruments." Materials 15, no. 19 (2022): 6850. http://dx.doi.org/10.3390/ma15196850.

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This study aimed to evaluate how various rotational modes influence the torque/force production and shaping ability of ProTaper Universal (PTU; non-heat-treated) and ProTaper Gold (PTG; heat-treated) nickel–titanium instruments. J-shaped resin canals were instrumented with PTU or PTG using an automated instrumentation device operated with reciprocating rotation [150° clockwise and 30° counterclockwise (R150/30) or 240° clockwise and 120° counterclockwise (R240/120)], optimum torque reverse motion (OTR), or continuous rotation (CR) (n = 10 each). Maximum force and torque were recorded, and cana

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Pereira Meireles, Milena Rodrigues, Polliane Olívia Leão, Maria De Lourdes Vieira Frujeri, Alyne Michelle Oliveira Moraes, and Poliana Amanda Oliveira Silva. "Pulp Calcification and External Reabsortion Resulting from Dental Trauma in Childhood, Associated with the Applicability of Guided Endodontic Treatment – Endoguide: Case Report." Journal of Dentists 12 (December 28, 2024): 62–71. https://doi.org/10.12974/2311-8695.2024.12.08.

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Introduction: Pulp canal calcification is characterized by the deposition of calcified tissue along the canal walls. As a result, the root canal can become completely obliterated, making endodontic treatment and its chemical- mechanical preparation difficult and contributing to accidents and complications. The objective of this case report is to understand that digital dentistry has added value in several dental situations. Endoguide provides safety, precision, efficiency, minimizes operative time, and reduces the chances of root canal deviation and damage to surrounding tissues. Methodology:

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Yang, Jiayi, Di Hu, Zihan Chen, Yicheng Xu, Zewei Zou, and Ying Zhu. "Analysis of Spatial and Temporal Distribution Patterns of Traditional Opera Culture along the Beijing–Hangzhou Grand Canal." ISPRS International Journal of Geo-Information 12, no. 12 (2023): 477. http://dx.doi.org/10.3390/ijgi12120477.

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As an exquisite asset of Chinese traditional culture, traditional opera occupies a place of high esteem within the world’s cultural and artistic treasury. The impact of emerging cultures has threatened the future of traditional opera culture, necessitating a thorough examination of the historical context of the Grand Canal and traditional opera. There is insufficient research on the spatial evolution of the traditional opera culture along the Grand Canal; thus, this study takes ancient opera stages, a representative cultural relic of traditional opera, as an entry point and employs methods suc

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Mai, Zhibin, Zilong Deng, and Wanghong Zhao. "A CBCT-Based Comparative Study of Alveolar Bone Parameters and Implant Outcomes Among Patients Suffering the Mandibular First and Second Molar Defects." Annali Italiani di Chirurgia 96, no. 5 (2025): 644–53. https://doi.org/10.62713/aic.3951.

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AIM: This study aimed to evaluate the anatomical differences in the alveolar bone at edentulous sites of the mandibular first and second molars using cone-beam computed tomography (CBCT) and to assess their impact on implant outcomes, thereby providing clinical insights to improve implant success in the mandibular second molar region. METHODS: A total of 504 patients with missing mandibular first or second molars were recruited in the Department of Stomatology at Foshan Fosun Chancheng Hospital between June 2020 and June 2023. These patients were divided into two groups: mandibular first molar

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Tsutsumi, Takeshi, and Atsushi Komatsuzaki. "An adequate parameter evaluating the galvanic body sway test: comparison with the caloric test in patients with vestibular schwannomas." Journal of Laryngology & Otology 113, no. 2 (1999): 118–21. http://dx.doi.org/10.1017/s002221510014335x.

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AbstractIt has been reported that the galvanic body sway test does not correlate with the caloric test. We evaluated the galvanic body sway test in patients with vestibular schwannomas using three parameters: the angle of deviation response onset, the maximum value of the deviation response, and the area of deviation. These parameters reflect velocity, position, and locus of the centre of pressure respectively. Among these parameters, only the angle of deviation response onset showed unilateral weakness of the response correlating with the canal paresis value, which indicates that velocity is

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Dr., Shivani Raghuvanshi. "Craniovertebral Junction Anomalies Evaluation by CT Head in Asymptomatic Individuals with MRI Correlation." International Journal of Medical and Pharmaceutical Research 4, no. 5 (2023): 167–72. https://doi.org/10.5281/zenodo.8373625.

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<strong>Objective</strong>: To measure cranio-vertebral parameters in asymptomatic individual in CT head and to study the deviation from the normal range in Indian population with their MRI correlation. <strong>Materials & Methods</strong>: The present study was carried out as a prospective cross-sectional comparative study at Department of Radiodiagnosis, Gandhi Medical College & associated Hamidia Hospital Bhopal during the study period of one year. Data collection was done & information was recorded on a proforma. The patients then underwent NCCT head. Parameters such as Welcher

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Voth, B. L., J. P. Sheppard, N. E. Barnette, et al. "The Gopen–Yang Superior Semicircular Canal Dehiscence Questionnaire: development and validation of a clinical questionnaire to assess subjective symptoms in patients undergoing surgical repair of superior semicircular canal dehiscence." Journal of Laryngology & Otology 132, no. 12 (2018): 1110–18. http://dx.doi.org/10.1017/s0022215118002219.

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AbstractObjectiveTo characterise subjective symptoms in patients undergoing surgical repair of superior semicircular canal dehiscence.MethodsQuestionnaires assessing symptom severity and impact on function and quality of life were administered to patients before superior semicircular canal dehiscence surgery, between June 2011 and March 2016. Questionnaire sections included general quality of life, internal amplified sounds, dizziness and tinnitus, with scores of 0–100 points.ResultsTwenty-three patients completed the questionnaire before surgery. Section scores (mean±standard deviation) were:

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Wilson, Bayard, Erik Curtis, Brian Hirshman, et al. "Lateral mass screw stimulation thresholds in posterior cervical instrumentation surgery: a predictor of medial deviation." Journal of Neurosurgery: Spine 26, no. 3 (2017): 346–52. http://dx.doi.org/10.3171/2016.8.spine16580.

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OBJECTIVE Normative data exists for stimulus-evoked pedicle screw electromyography (EMG) current thresholds in the lumbar spine, and is routinely referenced during spine surgeries to detect a screw breach, prevent injury of neural elements, and ensure the most biomechanically sound instrumentation construct. To date, similar normative data for cervical lateral mass screws is limited, thus the utility of lateral mass screw testing remains unclear. To address this disparity, in this study the authors describe cumulative lateral mass screw stimulation threshold data in patients undergoing posteri

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Lei, Hejie, Xingke Chen, and Ling Jian. "Canal-LASSO: A sparse noise-resilient online linear regression model." Intelligent Data Analysis 24, no. 5 (2020): 993–1010. http://dx.doi.org/10.3233/ida-194672.

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Least absolute shrinkage and selection operator (LASSO) is one of the most commonly used methods for shrinkage estimation and variable selection. Robust variable selection methods via penalized regression, such as least absolute deviation LASSO (LAD-LASSO), etc., have gained growing attention in works of literature. However those penalized regression procedures are still sensitive to noisy data. Furthermore, “concept drift” makes learning from streaming data fundamentally different from the traditional batch learning. Focusing on the shrinkage estimation and variable selection tasks on noisy s

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