Identifying Multiplanar Root Canal Curvatures Using Stainless-Steel Instruments

Jerome, Charles E.; Hanlon, Robert J.

doi:10.1097/00004770-200305000-00010

Cited by 16 publications

(10 citation statements)

References 3 publications

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“…As small stainless steel instruments are withdrawn from the canal, they are sometimes distorted into a shape that copies the multidirectional anatomy of the root canal system. The more complex anatomy would have been evident had an image been exposed with instruments in the root canal; however, file distortion provided the information necessary to minimize ledging or possible instrument fracture (Jerome & Hanlon 2003).…”

Section: Discussionmentioning

confidence: 99%

Mandibular first molars with disto‐lingual roots: review and clinical management

et al. 2012

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The purpose of this review was (i) to conduct a literature review on the prevalence and morphologic classification of mandibular first molars with disto-lingual (DL) roots, and (ii) to discuss the clinical approach to diagnosis and root canal treatment of these teeth. A search was carried out on electronic (MEDLINE, PubMed and Cochrane) and hand databases, which covered all publications from 1970 to December 2011. Two reviewers independently assessed the studies and recorded type of study, origin and sample sizes, number of teeth with three roots and type of root canal configuration. Forty-five studies were identified with a total of 19,056 mandibular first molar teeth. The frequency of DL roots was 14.4% and was associated with certain ethnic populations. The most common canal configuration of mesial and distal roots was Vertucci types IV and I, respectively. No significant differences were observed in the prevalence of DL roots according to gender. Variable results related to side were observed as well as a trend in bilateral occurrence. The root length of the DL roots was in general shorter than that of the disto-buccal roots (DB). Most DL roots had a greater angle of curvature and a smaller radius of curvature in a bucco-lingual orientation. The best methods to identify DL roots are a 25° mesial parallax periapical radiograph or cone-beam computed tomography (CBCT). A trapezoidal shape access cavity is desirable to locate the orifice of the DL canal. Clinicians should be aware of the variable furcation levels during coronal pre-flaring or post-space preparation to avoid furcal/strip perforations and a weakening of DL roots.

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Section: Discussionmentioning

confidence: 99%

Mandibular first molars with disto‐lingual roots: review and clinical management

et al. 2012

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“…Missing of anatomic information may be resulted if electronic apex locators are used exclusively. Additional anatomic information about root canals can be obtained by careful observation of positioning and deformation of instruments [20]. It is most important to be on the lookout for additional canals.…”

Section: Discussionmentioning

confidence: 99%

Healing of an Extensive Periradicular Lesion Subsequent to a Proper Endodontic Treatment of a Mandibular First Premolar with Complex Anatomy

Ashraf

Paymanpour

Bidabadi

et al. 2013

Case Reports in Dentistry

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Long-term success of endodontic treatment is strictly dependent on proper shaping and cleaning of the root canal system followed by obturation of entire prepared space. Anatomical variations should be considered during radiographic and clinical evaluation as parts of endodontic treatment. A mandibular premolar with three canals is quite rare and such a tooth requires special canal preparation and obturation techniques. An astute clinician should identify different canal configurations and treat them endodontically well, because presence of an untreated canal could be a reason for failure of endodontic treatment. This paper describes the conventional orthograde endodontic therapy on an unusual mandibular first premolar with three root canals.

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“…The reamer has an advantage when used to copy the canal curvatures, because the flutes are not twisted as the K file, has less memory and is more adaptable to a three dimensional shape (Jerome & Hanlon, 2003).…”

Section: Discussionmentioning

confidence: 99%

Piecewise Straight Line Approximation of Curve Existing in Slightly Curved Mesiobuccal Root Canal of Mandibular First Molar: A Radiographic Investigation

Prabhakar¹,

Priya²,

Doss

et al. 2013

Int. J. Morphol.

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SUMMARY:The aim of this study was to radiographically investigate the curve existing in slightly curved mesiobuccal canal of mandibular first molar by applying Piecewise straight line approximation. Extracted human mandibular molars were radiographed and one hundred radiographs were selected whose mesiobuccal canal showed slight curvature (10-20°) according to Schneider's method. The curves were traced and analyzed using Piecewise straight line method. Each curve was considered as a unit consisting of six different pieces of straight lines joining at seven specific points and the angle of curvature at these points was determined using the slope formula. All curves analyzed in this study had varying degrees of curvatures at different points on the curve. Maximum curvature (0.40°) was recorded at the middle third of the root canal. Within the limitation of the study, significant curvature occurs through out the curve existing in the mesiobuccal canal of mandibular first molar and the middle third of the curve showing greater degree of curvature. There is a possibility of greater curvature occurring in the coronal third of the curve. Though three dimensional studies would be more appropriate, Piecewise straight line approximation may be a better method than existing methods to simulate canal geometry.

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Identifying Multiplanar Root Canal Curvatures Using Stainless-Steel Instruments

Cited by 16 publications

References 3 publications

Mandibular first molars with disto‐lingual roots: review and clinical management

Mandibular first molars with disto‐lingual roots: review and clinical management

Healing of an Extensive Periradicular Lesion Subsequent to a Proper Endodontic Treatment of a Mandibular First Premolar with Complex Anatomy

Piecewise Straight Line Approximation of Curve Existing in Slightly Curved Mesiobuccal Root Canal of Mandibular First Molar: A Radiographic Investigation

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