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Joe Iwanaga - One of the best experts on this subject based on the ideXlab platform.

  • a rare case of trifid Mandibular Canal with bilateral retromolar foramina
    Anatomy & Cell Biology, 2020
    Co-Authors: Daniel Shen, Joe Iwanaga, Shane R Tubbs, Hiroe Ohyama
    Abstract:

    There are many reported anatomical variations of the Mandibular Canal. Consequently, there is great variation in the retromolar area, such as the quantity, size, and location of the retromolar foramen (RMF), the bony entrance of the retromolar Canal (RMC). These variations allow for different accessory innervations to the Mandibular molars and their adjacent buccal tissue because the RMC contains neurovascular bundles. Consideration of these anatomical variations is crucial for avoiding complications in anesthesia, implant placement, and surgery. However, the rarer Canal types are often only imaged by computed tomography (CT) or cone beam computed tomography (CBCT). We present a rare case with bilateral RMF and a unilateral trifid Mandibular Canal in a cadaver.

  • Mandibular Canal vs inferior alveolar Canal evidence based terminology analysis
    Clinical Anatomy, 2020
    Co-Authors: Yuki Matsushita, Soichiro Ibaragi, Joe Iwanaga, Tess Decater, Shane R Tubbs
    Abstract:

    Introduction The Mandibular Canal, as it was formerly named in Terminologia Anatomica (TA), has also been called the inferior alveolar (nerve) Canal in many scientific publications. This study was conducted to investigate how these terms have been understood in different regions and different areas of expertise and to discuss the appropriate future application of the term "Mandibular Canal." Methods A literature search was conducted using PubMed, and articles using different terms for this structure were classified into two groups, inferior alveolar Canal/inferior alveolar nerve Canal (IAC/IANC) and the Mandibular Canal (MC). The 50 most recent articles in each group were included. Publication year, journal title, country of the first author, and affiliation of all authors were recorded in both groups for all 100 articles. Results There was a significant difference between the IAC/IANC and MC groups in the numbers of anatomy journals, other journals, and anatomy affiliations. Turkey published most frequently with a total of 15 articles, followed by Iran with 10 articles, and China/India/United States with seven each. When the six countries of the first author that had three or more publications in each group were compared, only Turkey appeared in both groups; otherwise, different countries were in the two groups. Conclusions Based on the results of this analysis, and considering that the tentative new term "inferior alveolar foramen" is used in the latest TA, we suggest that the Mandibular Canal should be renamed the "inferior alveolar Canal."

  • microsurgical anatomy of the superior wall of the Mandibular Canal and surrounding structures suggestion for new classifications for dental implantology
    Clinical Anatomy, 2020
    Co-Authors: Joe Iwanaga, Mahindra Kumar Anand, Mitesh N Jain, Mizuki Nagata, Yuki Matsushita, Soichiro Ibaragi, Jingo Kusukawa, Shane R Tubbs
    Abstract:

    Our goal was to clarify the relationship between the superior wall of the Mandibular Canal and the presence of teeth. We also sought to study the structural changes of the Mandibular Canal after tooth loss. Twenty sides from 10 dry mandibles derived from six males and four females were used for this study. The age of the specimens at the time of death ranged from 57 to 91 years. The mandibles were cut in the midline resulting in 20 hemi-mandibles. The presence of teeth (from the second premolar to the third molar) was recorded for each hemi-mandible. The Mandibular Canal in the body of the mandible was divided into four areas, that is, Areas 1-4. The superior wall of the Mandibular Canal and a cancellous bone pattern above the Mandibular Canal were observed. Next, the Mandibular Canal was horizontally cut at its center and the superior wall of the Mandibular Canal observed inferiorly. A total of 75 areas (20 dentulous areas and 55 edentulous areas) were produced. The distal view was classified into three groups, Type I (trabecular pattern), Type II (osteoporotic pattern), and Type III (dense/irregular pattern). The Type I pattern was found in 60.0% (12/20) of the dentulous areas and 32.7% of the edentulous areas. While the Type II pattern was found in 15.0% (23/55) of the dentulous areas and 41.8% of the edentulous areas. The inferior view was classified into four groups depending on the surface of the superior wall of the Mandibular Canal, that is, Class I (trabecular pattern), Class II (osteoporotic pattern), Class III (dense/irregular pattern), and Class IV (smooth).The Class I pattern was seen most frequently (55.0%) in dentulous areas and the Class IV pattern (45.5%) most frequently in edentulous areas. Based on these results, we conclude that the superior wall of the Mandibular Canal could change following tooth loss. Clin. Anat. 33:223-231, 2020. © 2019 Wiley Periodicals, Inc.

B Klinge - One of the best experts on this subject based on the ideXlab platform.

  • Measurements of distances related to the Mandibular Canal in radiographs.
    Clinical oral implants research, 1995
    Co-Authors: Christina Lindh, A Petersson, B Klinge
    Abstract:

    Before implant surgery in the Mandibular side segment, it is of utmost interest to locate the Mandibular Canal in radiographs to avoid interference with the neurovascular bundle during surgery. Six Mandibular specimens were radiographically examined with 2 panoramic and 3 tomographic techniques. The distances between the superior border of the Canal and the alveolar crest and between the Mandibular base and the inferior border of the Canal were measured. In addition, the height of the Canal was measured. The measurements were performed by 3 or 4 observers and compared with measurements on contact radiographs of the same areas. Tomography gave more accurate values of the above distances than panoramic techniaues. The variation between observers in detecting the Mandibular Canal Aas large.

  • Visualisation of the Mandibular Canal by different radiographic techniques.
    Clinical oral implants research, 1992
    Co-Authors: Christina Lindh, A Petersson, B Klinge
    Abstract:

    6 mandibles were radiographically examined bilaterally to visualise the Mandibular Canal. 5 imaging techniques were used: periapical radiography, panoramic radiography, hypocycloidal tomography, spiral tomography and computed tomography (CT). Panoramic radiographs were obtained with 2 different X-ray machines. The CT-examinations comprised direct images and standard reconstructions based on axial slices. The specimens were subsequently sectioned for contact radiography. The visibility of the Mandibular Canal was estimated by 3 observers at special reference points on all radiographs and classified as clearly visible, questionable visibility or not visible. The contact radiographs served as the "gold standard". The inter-observer and the intra-observer agreement were assessed by calculating the overall agreement and the x value. Direct coronal computed tomography, as well as spiral and hypocycloidal tomography, gave better visualisation of the Mandibular Canal than periapical and panoramic radiography.

Petros D. Damoulis - One of the best experts on this subject based on the ideXlab platform.

  • Clinical significance of the structural integrity of the superior aspect of the Mandibular Canal.
    Journal of periodontology, 2004
    Co-Authors: Gary M. Reiser, Jeremy D. Manwaring, Petros D. Damoulis
    Abstract:

    Background: Sparse data can be found regarding the structural integrity of the superior aspect of the Mandibular Canal. In many cases, the Mandibular Canal must be carefully evaluated prior to defining patient treatment. Methods: In this case report, a 54-year-old patient presented with a periapical infection involving the mesial root of the Mandibular right second molar (#31). Radiographic evaluation revealed that the periapical lesion extended from the apex of the tooth to the superior aspect of the Mandibular Canal. Upon surgical removal of the tooth, an apical communication between the extraction socket and Mandibular nerve was located. A guided bone regeneration procedure was performed to protect the nerve from subsequent damage and to prepare the site for future implant placement. Implants were placed in the area approximately 5 months following the regenerative procedure. Results: After implant placement, the patient experienced normal function and no Mandibular symptomatology. Implants have been i...

Christina Lindh - One of the best experts on this subject based on the ideXlab platform.

  • Measurements of distances related to the Mandibular Canal in radiographs.
    Clinical oral implants research, 1995
    Co-Authors: Christina Lindh, A Petersson, B Klinge
    Abstract:

    Before implant surgery in the Mandibular side segment, it is of utmost interest to locate the Mandibular Canal in radiographs to avoid interference with the neurovascular bundle during surgery. Six Mandibular specimens were radiographically examined with 2 panoramic and 3 tomographic techniques. The distances between the superior border of the Canal and the alveolar crest and between the Mandibular base and the inferior border of the Canal were measured. In addition, the height of the Canal was measured. The measurements were performed by 3 or 4 observers and compared with measurements on contact radiographs of the same areas. Tomography gave more accurate values of the above distances than panoramic techniaues. The variation between observers in detecting the Mandibular Canal Aas large.

  • Visualisation of the Mandibular Canal by different radiographic techniques.
    Clinical oral implants research, 1992
    Co-Authors: Christina Lindh, A Petersson, B Klinge
    Abstract:

    6 mandibles were radiographically examined bilaterally to visualise the Mandibular Canal. 5 imaging techniques were used: periapical radiography, panoramic radiography, hypocycloidal tomography, spiral tomography and computed tomography (CT). Panoramic radiographs were obtained with 2 different X-ray machines. The CT-examinations comprised direct images and standard reconstructions based on axial slices. The specimens were subsequently sectioned for contact radiography. The visibility of the Mandibular Canal was estimated by 3 observers at special reference points on all radiographs and classified as clearly visible, questionable visibility or not visible. The contact radiographs served as the "gold standard". The inter-observer and the intra-observer agreement were assessed by calculating the overall agreement and the x value. Direct coronal computed tomography, as well as spiral and hypocycloidal tomography, gave better visualisation of the Mandibular Canal than periapical and panoramic radiography.

Christian Ulm - One of the best experts on this subject based on the ideXlab platform.

  • A histomorphometric analysis of the nature of the Mandibular Canal in the anterior molar region
    Clinical Oral Investigations, 2014
    Co-Authors: Kristina Bertl, Patrick Heimel, Karoline Maria Reich, Uwe Yacine Schwarze, Christian Ulm
    Abstract:

    Objectives Knowledge of the position and configuration of the Mandibular Canal is a basic requirement before implant placement in the mandible. Radiological studies suggest a positive correlation between alveolar trabecular bone quality and Mandibular Canal corticalization. The aim of this study was to test this assumption histomorphometrically in the anterior molar region, which is one of the most frequent places for implantation. Materials and methods Fifty thin ground sections (from 28 male and 22 female cadavers) of the first molar region were investigated for trabecular bone volume and thickness and the presence of a Mandibular Canal wall. Results Trabecular bone volume was significantly higher in males ( p  = 0.009). Further, it correlated significantly with the presence of a Canal wall (rho = 0.585, p  

  • A histomorphometric analysis of the nature of the Mandibular Canal in the anterior molar region
    Clinical oral investigations, 2013
    Co-Authors: Kristina Bertl, Patrick Heimel, Karoline Maria Reich, Uwe Yacine Schwarze, Christian Ulm
    Abstract:

    Objectives Knowledge of the position and configuration of the Mandibular Canal is a basic requirement before implant placement in the mandible. Radiological studies suggest a positive correlation between alveolar trabecular bone quality and Mandibular Canal corticalization. The aim of this study was to test this assumption histomorphometrically in the anterior molar region, which is one of the most frequent places for implantation.

  • Location of the Mandibular Canal within the atrophic mandible
    The British journal of oral & maxillofacial surgery, 1993
    Co-Authors: Christian Ulm, P. Solar, R. Blahout, M. Matejka, Georg Watzek, Helmut Gruber
    Abstract:

    Abstract In 43 edentulous, lower jaw halves, sections were carried out in the area between the mental foramen and the third molar. The relative changes in the location and course of the Mandibular Canal which are caused by atrophy were analysed. For this purpose, the mandibles were classified according to so-called residual ridge orders which describe the different stages of alveolar ridge resorption. The following findings were obtained: The distance between the Mandibular Canal and the lingual and buccal external border does not change in any stage of the atrophic process, i.e. it remains conspicuously constant. However, the distance between the Mandibular Canal and the cranial and caudal borders of the body of the mandible partly changes to a statistically highly-significant extent, the distance between the Canal and the atrophic alveolar ridge being affected more strongly than that between the Canal and the base of the mandible. These changes were most clearly pronounced in the area of the first molar.