Determination of the Accurate Tooth Length and Apical Constriction Measurements by different Methods in Mandibular Premolar Teeth

2020 ◽  
Vol 24 (5) ◽  
pp. 1774-17841
Author(s):  
Sameer Hatem Abdulhaleem
Keyword(s):  
Apical Constriction ◽  
Tooth Length

Determination of Total Length in Human Permanent Teeth - An Anthropometric Study

2016 ◽  
Vol 695 ◽  
pp. 20-24
Author(s):  
Mugur George Popescu ◽  
Diana Marian ◽  
Ramona Amina Popovici ◽  
Teodora Ștefănescu
Keyword(s):  
Root Canal ◽  
Population Group ◽  
Geographic Area ◽  
Permanent Teeth ◽  
X Ray ◽  
Working Length ◽  
Exact Determination ◽  
Anthropometric Study ◽  
Tooth Length

The correct endodontic treatment involves the exact determination of the working length. This is accomplished by combining several techniques: the tactile technique, X-ray with the needle or the endodontic probe in the root canal and comparing with the average tooth length.The determination of average tooth length depends on the geographic area. The current table used in practice contains the values gathered on a population group that is different than ours; the table has been made on Caucasian subjects.In conclusion, our study aims to determine the proper average values of our geographic zone, the table obtained by completing the equation of the endodontic therapy that will admit the proximity of the Romanian reality.

scholarly journals An in vivo Study to determine the Effects of Early Preflaring on the Working Length in Curved Mesial Canals of Mandibular Molars

2013 ◽  
Vol 14 (2) ◽  
pp. 163-167 ◽  
Author(s):  
Mahmoud K AL-Omiri ◽  
Azhar Iqbal ◽  
Iftikhar Akbar
Keyword(s):  
In Vivo Study ◽  
Tactile Sensation ◽  
Apical Constriction ◽  
Mandibular Molars ◽  
Working Length ◽  
Group A ◽  
Length Determination

ABSTRACT Aim To evaluate the effects of a preflaring method on the determination of working length in the curved mesial canals of mandibular molars. Materials and methods Ninety mandibular molars with apical curvature of 30 to 40° were selected and randomly divided into two groups; each containing 45 teeth. In the first group, the initial instrumentation was performed with preflaring on the mesiobuccal canal (preflared group), and in the second group; the instrumentation was performed without preflaring on the mesiobuccal canal (nonpreflared group). A size 15 K-file was inserted in the mesiobuccal canals until the apical constriction could be felt by tactile sensation and a radiograph was taken to identify the distance between the file tip and radiographic apex. The location of the tip was classified as (a) within 1 mm of the radiographic apex, (b) more than 1 mm of the radiographic apex, or (c) overextended beyond the radiographic apex. The collected data was statistically analyzed and probability value was set to be ≤ 0.05. Results The file tip was significantly closer to the true working length in the canals with early preflaring compared to the canals without early preflaring (p < 0.005). In the preflared group; 75.5% of the cases had the file tip in location ‘a’, 13.3% in location ‘b’, and 11.1% in location ‘c’. In the nonpreflared group; 33.3% of the cases had the file tip in location ‘a’, 53.3% in location ‘b’ and 13.3% in location ‘c’. Conclusion Preflaring the coronal portion of curved canals greatly improved the access to the apical constriction, and thus enhanced correct working length determination. If the coronal portion of the curved canals is not preflared, the clinician cannot discern the accuracy of what they feel apically. Thus, preflaring is a highly recommended procedure especially in curved canals for better determination of correct working length. How to cite this article Iqbal A, Akbar I, AL-Omiri MK. An in vivo Study to determine the Effects of Early Preflaring on the Working Length in Curved Mesial Canals of Mandibular Molars. J Contemp Dent Pract 2013;14(2):163-167.

scholarly journals Determination of Tooth Length Variation Of Maxillary Canine - An Analytical Study

2015 ◽  
Vol 3 (1) ◽  
pp. 40-45 ◽  
Author(s):  
Deependra Naulakha ◽  
Manish Agrawal ◽  
Nootan Naulakha
Keyword(s):  
Analytical Study ◽  
Length Variation ◽  
X Rays ◽  
Pulp Tissue ◽  
Maxillary Canine ◽  
Working Length ◽  
Radiographic Interpretation ◽  
Maximum Minimum ◽  
Tooth Length

Aim: The Aim of this study was to assess the variation in anatomical tooth length of maxillary canine, irrespective of sex, in patient's presenting at NMCTH, Biratnagar, Nepal.   Methodology: A total of 30 Endodontically treated maxillary canine were included in this study. Preoperative radiographs were taken initially for finding the canal length. Radiographic interpretation (IOPA X-rays) and mathematical calculation, proposed by Ingles and messing, were used to observe and measure the length of individual root canal for tooth length. An endodontic access was prepared and pulp tissue was extirpated. A working length radiograph was taken with a file in the canal and the radiographic working length was established. Results: This study revealed that the maximum, minimum and average tooth length of maxillary canine is 30mm, 18mm and 22.91 mm respectively. Conclusion: The result indicates that the study previously performed by different researchers and those given in the different textbook of endodontics showed that the tooth length is shorter than the caucasoid counterpart.DOI: http://dx.doi.org/10.3126/jonmc.v3i1.12236Journal of Nobel Medical CollegeVol. 3, No.1 Issue 6, 2014, Page: 40-45

scholarly journals Guía para el uso del Localizador de foramen

2015 ◽  
Vol 17 (1) ◽  
pp. 31
Author(s):  
Marco Meza DDS
Keyword(s):  
Apical Constriction ◽  
Left Behind ◽  
Total Length ◽  
Length Measure ◽  
Working Length

Now days is more the trust we can have to the Apex-locator in endodontics. Now we can expect more accuracy results working length measure, not only of the apical constriction but the total length of the roots. Endodontics can’t left behind the use of the Apex-locator, because of its useful work, not only on the determination of the works length, also in the diagnostic of perforations or fractures. Even do, this article displays a reliable and simple guide in the use of apex locator during enodontic treatment.  

scholarly journals Digital Radiography for Determination of Primary Tooth Length:In VivoandEx VivoStudies

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Maria D. Basso ◽  
Fabiano Jeremias ◽  
Rita C. L. Cordeiro ◽  
Lourdes Santos-Pinto
Keyword(s):  
Digital Radiography ◽  
Ex Vivo ◽  
Clinical Situation ◽  
Primary Tooth ◽  
Digital Radiographs ◽  
Digital Radiograph ◽  
Tooth Length

Background.Methods for determining the root canal length of the primary tooth should yield accurate and reproducible results.In vitrostudies show some limitations, which do not allow their findings to be directly transferred to a clinical situation.Aim.To compare the accuracy of radiographic tooth length obtained fromin vivodigital radiograph with that obtained fromex vivodigital radiograph.Method.Direct digital radiographs of 20 upper primary incisors were performed in teeth (2/3 radicular resorption) that were radiographed by an intraoral sensor, according to the long-cone technique. Teeth were extracted, measured, and mounted in a resin block, and then radiographic template was used to standardise the sensor-target distance (30 cm). The apparent tooth length (APTL) was obtained from the computer screen by means of an electronic ruler accompanying the digital radiography software (CDR 2.0), whereas the actual tooth length (ACTL) was obtained by means of a digital calliper following extraction. Data were compared to the ACTL by variance analysis and Pearson’s correlation test.Results.The values for APTL obtained fromin vivoradiography were slightly underestimated, whereas those values obtained fromex vivowere slightly overestimated. No significance was observed(P≤0.48)between APTL and ACTL.Conclusion.The length of primary teeth estimated byin vivoandex vivocomparisons using digital radiography was found to be similar to the actual tooth length.

Determination of apical constriction and apical foramen using electronic apex locator in vivo: Comparison between vital and nonvital teeth

2018 ◽  
Vol 8 (2) ◽  
pp. 99
Author(s):  
Gaurav Aggarwal ◽  
Poonam Bogra ◽  
Saurabh Gupta ◽  
Ayushi Jindal ◽  
Nitesh Jain
Keyword(s):  
Apical Constriction ◽  
Electronic Apex Locator

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

Distance to SN 1987A and the LMC

1999 ◽  
Vol 190 ◽  
pp. 549-554
Author(s):  
Nino Panagia
Keyword(s):  
Angular Size ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Light Curves ◽  
Distance Modulus ◽  
Absolute Size ◽  
Sn 1987A

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.

International determination of the total motion of the pole

1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  
Secular Motion ◽  
The Future

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).

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