Effects of Root Canal Preparation on Apical Geometry Assessed by Micro–Computed Tomography

Paqué, Frank; Ganahl, Daniel; Peters, Ove A.

doi:10.1016/j.joen.2009.04.020

Cited by 265 publications

(301 citation statements)

References 28 publications

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“…Due to the great anatomical variations, in both mesial and distal roots, and a high frequency of accessory canals, we are also (5) of the opinion that endodontic instruments and treatment techniques should be carefully selected in order to avoid mishaps; thus, compromising success during endodontic treatment (5). With the morphology knowledge reported in this and other micro-computer tomography investigations (5,7,11,13,(16)(17)(18)(23)(24)(25), the importance of appropriate root canal preparation systems and irrigating solution selection becomes evident when considering the three dimensionality of the root canal system.…”

Section: Discussionmentioning

confidence: 84%

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Root Canal Morphology and Configuration of 118 Mandibular First Molars by Means of Micro–Computed Tomography: An Ex Vivo Study

Wolf

Paqué

Zeller

et al. 2016

Journal of Endodontics

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INTRODUCTION The aim of this study was to investigate the root canal system morphology of the mandibular first molar by means of micro-computed tomography. METHODS The root canal configuration, foramina, and accessory canals frequency of 118 mandibular first molars were investigated by means of micro-computed tomography and 3-dimensional software imaging. A 4-digit system describes the root canal configuration from the coronal to apical thirds and the main foramina number. RESULTS The most frequent root canal configurations in mesial root were 2-2-2/2 (31.4%), 2-2-1/1 (15.3%), and 2-2-2/3 (11.9%); another 24 different root canal configurations were observed in this root. A 1-1-1/1 (58.5%), 1-1-1/2 (10.2%), and 16 other root canal configurations were observed in the distal root. The mesiobuccal root canal showed 1-4 foramina in 24.6%, and the mesiolingual showed 1-3 foramina in 28.0%. One connecting canal between the mesial root canals was observed in 30.5% and 2 in 3.4%. The distolingual root canal showed 1-4 foramina in 23.7%, whereas a foramen in the distobuccal root canal was rarely detected (3.4%). The mesiobuccal, mesiolingual, and distolingual root canals showed at least 1 accessory canal (14.3, 10.2, and 4.2%, respectively), but the distobuccal had none. CONCLUSIONS The root canal configuration of mandibular first molars varies strongly. According to our expectations, both the mesial and distal roots showed a high number of morphologic diversifications. The root canal system of the mesial root showed more root canal configuration variations, connecting and accessory canals than the distal root.

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Section: Discussionmentioning

confidence: 84%

“…The teeth were scanned at an isotropic resolution of 20 µm in a desktop micro-computed tomography unit (µCT 40; Scanco Medical, Brüttisellen, Switzerland) by means of a previ-ously established method (16)(17)(18) at settings of 70 kV and 114 µA resulting in 800 to 1200 slices per tooth.…”

Section: Micro Computed Tomography Morphological Analysismentioning

confidence: 99%

Root Canal Morphology and Configuration of 118 Mandibular First Molars by Means of Micro–Computed Tomography: An Ex Vivo Study

Wolf

Paqué

Zeller

et al. 2016

Journal of Endodontics

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“…Root canal anatomy has been described and controversially discussed in literature (3). Nowadays, micro-computed tomography (µCT) combined together with a rendering software allows the imaging and three-dimensional analysis of tooth structures (5,(8)(9)(10)(11)(12). High resolution µCT not only provides a comprehensive analysis of the endodontic morphology, but it gives additional minute information of the root canal system complexity (4,8,13,14).…”

Section: Introductionmentioning

confidence: 99%

Root Canal Morphology and Configuration of 179 Maxillary First Molars by Means of Micro–computed Tomography: An Ex Vivo Study

Briseño-Marroquín

Paqué

Maier

et al. 2015

Journal of Endodontics

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INTRODUCTION The objective of this study was to propose a root canal configuration description method and to investigate the root canal system morphology of the maxillary first molar by means of micro-computed tomographic imaging. METHODS The root canal configuration, foramina, and accessory canal frequency of 179 maxillary first molars were investigated by means of micro-computed tomographic imaging and 3-dimensional software imaging. The root canal configuration and main foramina number are described from coronal to apical with a 4-digit system. RESULTS The most frequent root canal configurations were 1-1-1/1 (45.8%), 2-2-2/2 (25.1%) and 2-2-1/1 (10.1%) in mesiobuccal roots and 1-1-1/1 in distobuccal (97.2%) and palatal (98.9%) roots. The first mesiobuccal (MB1) root canal had 1 accessory canal in 26.3% of the teeth, the distobuccal root canal had 12.3%, and the palatal root canal had 9.5%; in the second mesiobuccal root canal, there was rarely 1 accessory canal. There was 1 accessory canal in 26.3%, 12.3%, and 9.5% in the MB1, distobuccal, and palatal root canals, respectively. The MB1, distobuccal, and palatal root canals had 1 main foramen. The MB2 had 1 main foramen in 39.0% of the teeth and no main foramen in 61.0%. CONCLUSIONS The root canal configuration of maxillary first molars is quite diversified. Contrary to our expectations in this research, the mesiobuccal root has predominantly 1 root canal entrance and only 1 main foramen. Anatomic variations including connecting and accessory canals occur in any third of root.

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“…8 Finally, µCT data can be stored and worked three-dimensionally at a later time for comparative or qualitative assessment purposes. 27 The effect of the different instrument manufacturing methods-ground (ES) versus twisted (TF) -on the degree and direction of root canal transportation has been previously described.…”

Section: Discussionmentioning

confidence: 99%

Assessing apical transportation in curved canals: comparison between cross-sections and micro-computed tomography

et al. 2012

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Assessing apical transportation in curved canals: comparison between cross-sections and micro-computed tomography Abstract: The aim of this study was to compare two methods of assessing apical transportation in curved canals after rotary instrumentation, namely, cross-sections and micro-computed tomography (µCT). Thirty mandibular molars were divided into two groups and prepared according to the requirements of each method. In G1 (cross-sections), teeth were embedded in resin blocks and sectioned at 2.0, 3.5, and 5.0 mm from the anatomic apex. Pre-and postoperative sections were photographed and analyzed. In G2 (µCT), teeth were embedded in a rubber-base impression material and scanned before and after instrumentation. Mesiobuccal canals were instrumented with the Twisted File (TF) system (SybronEndo, Orange, USA), and mesiolingual canals, with the EndoSequence (ES) system (Brasseler, Savannah, USA). Images were reconstructed, and sections corresponding to distances 2.0, 3.5, and 5.0 mm from the anatomic apex were selected for comparison. Data were analyzed using Mann-Whitney's test at a 5% significance level. The TF and ES instruments produced little deviation from the root canal center, with no statistical difference between them (P > 0.05). The canal transportation results were significantly lower (0.056 mm) in G2 than in G1 (0.089 mm) (p = 0.0012). The µCT method was superior to the cross-section method, especially in view of its ability to preserve specimens and provide results that are more closely related to clinical situations.

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Effects of Root Canal Preparation on Apical Geometry Assessed by Micro–Computed Tomography

Cited by 265 publications

References 28 publications

Root Canal Morphology and Configuration of 118 Mandibular First Molars by Means of Micro–Computed Tomography: An Ex Vivo Study

Root Canal Morphology and Configuration of 118 Mandibular First Molars by Means of Micro–Computed Tomography: An Ex Vivo Study

Root Canal Morphology and Configuration of 179 Maxillary First Molars by Means of Micro–computed Tomography: An Ex Vivo Study

Assessing apical transportation in curved canals: comparison between cross-sections and micro-computed tomography

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