Early flaring and crown-down shaping influences the first file bind to the canal apical third

Silveira, Luiz Fernando Machado; Martos, Josué; Pintado, Laura Siqueira; Teixeira, Rejane A.; Neto, João Batista César

doi:10.1016/j.tripleo.2008.04.010

Cited by 16 publications

(12 citation statements)

References 13 publications

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“…This is very important when the location of the major apical foramen or root apex is buccal or lingual because it may result in overinstrumentation. The clinical determination of this limit is based on the operator's tactile sensitivity and the subjective interpretation of the bidimensional radiographic image (27). Small but quite important variations of apical micromorphology, which may not be detected radiographically, require the use of auxiliary methods like electronic methods, an operating microscope, and cone-beam computed tomography scanning (1).…”

Section: Discussionmentioning

confidence: 99%

Morphologic Analysis of the Root Apex in Human Teeth

Martos¹,

Lubian²,

Silveira³

et al. 2010

Journal of Endodontics

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Section: Discussionmentioning

confidence: 99%

Morphologic Analysis of the Root Apex in Human Teeth

Martos¹,

Lubian²,

Silveira³

et al. 2010

Journal of Endodontics

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“…However, morphologic analyses have shown that apical foramen often does not have a round shape and to achieve a more accurate estimate of the apical diameter, removal of the interferences along the coronal and middle thirds of the root canal is necessary. [10111213]…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the apical adaptation performance of various root canal instruments

et al. 2013

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Objective:The aim of this study was to evaluate the apical root canal adaptation performance of various root canal instruments.Materials and Methods:A total of 40 freshly extracted single-rooted mandibular incisors were used in this study. Coroner parts of all teeth were removed from cemento-enamel junction and root canal of each tooth was explored with a size 8 K-file until the tip of the file was just visible at the apex. Working lengths (WLs) were determined as 1 mm short of these measurements. ProTaper, K-file, profile and hedstroem files were inserted into the root canals of 10 teeth to the WL following the flaring of the coronal and middle thirds. Instruments were fixed in the root canals with acrylic resin. The apical 1 mm of each root tip was ground on wet sandpaper to expose the canal and the instrument at the WL and the apical region of each tooth was examined under stereomicroscope. The stereoscopic images of the teeth were digitized and analyzed with software in order to determine the differences between the areas of root canals and file tips. Result data were analyzed using the one-way analysis of variance test (P = 0.05).Results:There were no significant differences between apical file/root canal areas of the evaluated instruments (P > 0.05).Conclusions:None of the evaluated instruments performed a perfect adaptation with the apical root canal surface at the WL in mandibular incisors. Therefore, total removal of the debris from the apical canal surface may not be achieved when these filing instruments are used.

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“…We should take greater care in preparing biomechanics when it comes to oval canals, because the extent of apical extension is based on the estimate of the apical canal diameter given by the adaptation of the endodontic file in its original working length; however, this manual detection of the apical zone will depend crucially on their shape and narrowing (Silveira et al 2008). Paqué et al (2010) analyzed two-and three-dimensional adaptation of apical files in molars, and observed that its apical adaptation was poor and did not correspond to their original anatomy.…”

Section: Discussionmentioning

confidence: 99%

Anatomical evaluation of the root canal diameter and root thickness on the apical third of mesial roots of molars

Martos

Tatsch

et al. 2011

Anat Sci Int

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The purpose was to determine the diameter of the main root canal and wall thickness in the apical dentin in mesial roots of maxillary and mandibular molars. Forty mesiobuccal and mesial root specimens were sectioned horizontally at 1, 2 and 3 mm from the apex, and measured at each top surface by using optical microscopy to an accuracy of ×20 magnification. The anatomical parameters were established as the following points of reference: AB, two points connected by a line from the outer edge of the mesial wall to the outer edge of the distal one through the center of the root canal to measure the thickness of the root and mesiodistal diameter of the root canal (CD). A second line (EF) was designed to evaluate the diameter of the root canal in the buccolingual direction. All data were summarized, and values were assessed statistically by ANOVA and Bonferroni multiple comparisons. The buccolingual (BL) root canal diameters at 1, 2 and 3 mm in the mandibular and maxillary molars were greater than in the mesiodistal (MD), showing statistically significant differences (p < 0.05). The MD root thicknesses at 1, 2 and 3 mm in mandibular and maxillary molars were statistically significant (p < 0.05). The lowest value to 1 mm from the apex in the mandibular molars was 1.219 mm and the highest at 3 mm from the root apex in maxillary molars was 1.741 mm. The BL diameters in maxillary and mandibular molars were higher than the MD diameter. The thickness (MD) of maxillary and mandibular molars decreased as a function of apical proximity.

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Early flaring and crown-down shaping influences the first file bind to the canal apical third

Cited by 16 publications

References 13 publications

Morphologic Analysis of the Root Apex in Human Teeth

Morphologic Analysis of the Root Apex in Human Teeth

Evaluation of the apical adaptation performance of various root canal instruments

Anatomical evaluation of the root canal diameter and root thickness on the apical third of mesial roots of molars

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