Dental Journal of Iwate Medical University
Online ISSN : 2424-1822
Print ISSN : 0385-1311
ISSN-L : 0385-1311
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Volume 35, Issue 3
Displaying 1-11 of 11 articles from this issue
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Originals
  • Usefullness of cone beam CT "3D Accuitomo F17(R)" for the visualization of temporomandibular joint structures
    Satoru SHOJI, Mitsuru IZUMISAWA, Noriaki TAKAHASHI, Keisuke SAITOH, Hi ...
    Article type: Article
    2010 Volume 35 Issue 3 Pages 127-134
    Published: December 20, 2010
    Released on J-STAGE: March 07, 2017
    DOIhttps://doi.org/10.20663/iwateshigakukaishi.35.3_127
    JOURNAL FREE ACCESS
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    3D Accuitomo F17 is cone beam computed tomography (CT) unit for examination of maxillofacial area. It adopts five kinds of field of view (FOV) (40×40mm, 60×60mm, 80×80mm, 100×100mm, 170×120mm) and developed "zoom reconstruction" function that provides five kinds of voxel size (80μm, 125μm, 160μm, 200μm, 250μm) to change the image resolution. The purpose of this study is to evaluate the usefulness of this unit for visualization of temporomandibular joint (TMJ) structures. Firstly, we scanned one dry human skull by all of FOV, and underwent zoom reconstruction by all of voxel size using image data were obtained in largest FOV (170×120mm). Secondary, we performed similar examination to three patients were suspected osteoarthrosis of TMJ. As the results, the image quality of TMJ structures were good so that FOV was small, and clear images were obtained when we reconstructed them at small pixel size even if we we scanned it in large FOV. Therefore, it seems that we can evaluate of coordination of in the condylar movement by scanning bilateral movement in large FOV, and we can obtain clear images at small voxel size. This results of this study suggest that 3D Accuitomo F17 is very useful cone beam unit for the visualization of TMJ region.
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  • Evaluation of bolus formation in masticatory function by using videoendoscopy
    Risako Abe, Junichi Furuya
    Article type: Article
    2010 Volume 35 Issue 3 Pages 135-145
    Published: December 20, 2010
    Released on J-STAGE: March 07, 2017
    DOIhttps://doi.org/10.20663/iwateshigakukaishi.35.3_135
    JOURNAL FREE ACCESS
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    In the field of prosthodontics, many methods for evaluating the masticatory function were carried out by ejection of the food bolus from the mouth. Yet, these methods could not evaluate mastication and swallowing function comprehensively. The purpose of present study is to evaluate masticatory functions during a series of masticatory and swallowing movements by using videoendoscopy (VE). Subjects are ten healthy dentulous adults without dysphagia. The test foods used were two-colored (green and white) molded rice and uirou. The test foods were consumed under the restriction on the number of mastication (10, 15, 20, and 30). The food bolus in the oropharynx was evaluated qualitatively by using VE in terms of the degree of grindability, cohesiveness, and mixing. In addition, the degree of easiness of swallowing was measured with visual analogue scale (VAS). In both rice and uirou, degree of cohesiveness showed a constant high value under all conditions. The significant correlation coefficients were observed between the number of mastication, the degree of grindability, and mixing. In addition, the significant correlation coefficients were observed between the value of VAS, degree of grindability, mixing, and the number of mastication. The present study demonstrates that VE can be applicable for evaluating the masticatory function, although the aim of VE has so far been limited to the evaluation of swallowing in the pharyngeal stage. And also, although these results suggest that adequate mastication induces smooth swallowing, it could be adjusted to the degree of grindability and mixing of food bolus by mastication.
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Case reports
  • A Case Report of Severe Chronic Periodontitis Evaluated by Serum IgG Antibody Titer Test against Periodontal Pathogens
    Koji Naruishi, Kazushi Kunimatsu
    Article type: Article
    2010 Volume 35 Issue 3 Pages 146-152
    Published: December 20, 2010
    Released on J-STAGE: March 07, 2017
    DOIhttps://doi.org/10.20663/iwateshigakukaishi.35.3_146
    JOURNAL FREE ACCESS
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    Chronic periodontitis is a polymicrobial infectious disease which may result in loss of teeth by inflammation-mediated bone resorption. More than 500 individual cultivable species of microbes have been identified in the human mouth, and the microbiological examinations for periodontitis have been available to dental clinicians since the late 1980s. Infection with periodontal pathogens leads to humoral immunological responses and elevates the levels of serum IgG antibody to the antigens. Since serum IgG antibodies levels correspond to the amount of periodontal bacteria, the effects of treatments focused on elimination of bacteria could be evaluated by decrease of serum IgG titer to the pathogens. In the present case report, we propose the clinical usefulness of serum IgG antibody levels as a marker for periodontal treatment effects.
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Index Vol. 35
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