Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)
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Review Article
Mini Review
Original Work
  • Kozue Hasegawa-Nakamura, Toshiaki Nakamura, Masato Kamitomo, Fumi Tate ...
    Volume 59 (2017) Issue 3 Pages 133-143
    Released: September 28, 2017
    JOURNALS FREE ACCESS FULL-TEXT HTML

    The present study aimed to investigate the association between periodontal conditions and abnormal glucose tolerance (GT) in pregnant women with threatened premature labor (TPL). Fifteen normal pregnant women, 14 women with TPL and abnormal GT (TPL/abnormal GT), and 16 women with TPL and normal GT (TPL/normal GT) were enrolled. Periodontal parameters, including probing pocket depth and clinical attachment level, were examined. Detection of Porphyromonas gingivalis (P. gingivalis), Fusobacterium nucleatum (F. nucleatum), Prevotella intermedia (P. intermedia), Aggregatibacter actinomycetemcomitans, Treponema denticola, and Tannerella forsythia (T. forsythia), in saliva, subgingival plaque, and chorionic tissues from women was performed by using polymerase chain reaction. There were no significant differences in periodontal parameters and detection rates of periodontal pathogens from oral samples between women with TPL/normal GT and TPL/abnormal GT. F. nucleatum, P. intermedia, and T. forsythia were detected in chorionic tissues of women with TPL/abnormal GT, whereas F. nucleatum and P. gingivalis were detected in chorionic tissues of those with TPL/normal GT. No periodontal pathogens were detected in the chorionic tissues of normal pregnant women. In conclusion, our data do not indicate that periodontal disease is a risk factor for abnormal GT in TPL. However, the presence of F. nucleatum, P. intermedia, and T. forsythia in chorionic tissues in women with TPL may be involved in abnormal GT.

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Topic
Case Report Review
Case Report
  • Michio Kubota, Yuki Nagashima
    Volume 59 (2017) Issue 3 Pages 161-171
    Released: September 28, 2017
    JOURNALS FREE ACCESS FULL-TEXT HTML

    Depending on the location of an impacted tooth, traction from the gingiva may be necessary in the absence of an attached gingiva. Herein, we report 2 cases with an impacted tooth and a tooth with lower labioversion for which the prevention of gingival recession and a stable attached gingiva were successfully obtained after free gingival grafting during traction as part of orthodontic treatment. Case 1 was a 17-year-old male patient who had gingivitis, an inversely impacted maxillary left central incisor, and severe crowding. During the treatment, we performed initial periodontal therapy for the gingivitis, orthodontic treatment for the impacted tooth and crowding, fenestration surgery for the crown of the impacted tooth, and free gingival grafting to obtain attached gingiva for the tooth. Gingival grafting for the impacted tooth was performed once the crown had sufficiently erupted as a result of traction from the orthodontic treatment so as to allow free gingival grafting to the labial cervical region. The inversely impacted central incisor was then appropriately arranged, and a sufficient width was obtained for the surrounding attached gingiva. Case 2 was a 16-year-old female patient who had localized periodontitis, skeletal maxillary protrusion, severe crowding of the mandibular anterior teeth, and crowding-induced gingival recession of the mandibular left central incisor. For this patient, we provided the same treatment as that used for Case 1, in the same order. The timing of the gingival grafting was particularly important. The periodontal surgical procedures were performed when leveling for the crowding of the mandibular anterior teeth had been completed. In both patients, free gingival grafting was performed to obtain keratinized gingiva during traction/guiding of the impacted and displaced teeth by orthodontic force, and gingival recession was prevented by successive orthodontic treatments. Furthermore, the gingival recession caused by the roll-separating force improved in Case 2.

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Educational Award
Dental Hygienist Corner
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