The Bulletin of Tokyo Dental College
Print ISSN : 0040-8891
Volume 45, Issue 2
May
Displaying 1-5 of 5 articles from this issue
Original Articles
  • RENAO HERMAN SUNDFELD, SILVIO JOSÉ MAURO, ANDRÉ LUIZ FRA ...
    Article type: Others
    Subject area: Others
    2004 Volume 45 Issue 2 Pages 67-75
    Published: 2004
    Released on J-STAGE: July 15, 2005
    JOURNAL FREE ACCESS
    The clinical behavior of Concise and Prisma Shield sealants for pit and fissure was analyzed by clinical/photographic evaluation. A hematoxylin-based staining solution was applied to the occlusal surface 7 days, 18 months, 36 months, and 11 years after the occlusal sealing, thus allowing the sealant material on the surface to be checked. At each analysis time, each occlusal surface was photographed, and the photographs corresponding to each time were submitted to clinical/photographic evaluation. Although the sealant materials showed marginal alterations over time, they did not require reapplication because the region composed of the pit and fissure remained covered.
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  • KIYOTOSHI TAKANASHI, MASATAKA KISHI, KATSUJI OKUDA, KAZUYUKI ISHIHARA
    Article type: Others
    Subject area: Others
    2004 Volume 45 Issue 2 Pages 77-85
    Published: 2004
    Released on J-STAGE: July 15, 2005
    JOURNAL FREE ACCESS
    Colonization by periodontopathic bacteria is a risk factor for peri-implantitis. The purpose of this study was to investigate the colonization by black-pigmented anaerobic bacteria that occurs between the time before fixture installation and 6 months after inserting superstructures in implant treatment in partial edentulous cases. Dental plaque was serially collected from around the natural teeth and implants in 12 patients in whom a dental implant was indicated, and Porphyromonas gingivalis and Prevotella intermedia were detected using polymerase chain reaction (PCR). One month after connecting the abutment, the detection rate of P. gingivalis per site from around the implants was 63.7% and that of P. intermedia was 50.8%. Six months after superstructure setting, the detection rate per site of P. gingivalis from around the implants was 56.8% and that of P. intermedia was 41.1%. When chromosomal DNA segmentation patterns in the isolated P. gingivalis and P. intermedia were compared using pulsed field gel electrophoresis (PFGE), the patterns in the natural teeth were in accordance with those in the implants in 3 of 4 cases (75.0%) in P. gingivalis and all cases in P. intermedia. This finding suggested that bacterial colonization around implants occurred early after the implant region was exposed to the intraoral cavity and that the bacteria were transmitted from the area around the natural teeth.
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Case Reports
  • YOSHIKO TSUCHIYA, KENJI SUEISHI, KENICHI YATABE, HIDEHARU YAMAGUCHI
    Article type: Others
    Subject area: Others
    2004 Volume 45 Issue 2 Pages 87-93
    Published: 2004
    Released on J-STAGE: July 15, 2005
    JOURNAL FREE ACCESS
    Antley-Bixler syndrome is a disorder characterized by craniosynostosis, midface hypoplasia, choana blockade, and radiohumeral synostosis. However, the features of occlusion remain unclear.
    In this paper, we report a case of Antley-Bixler syndrome, a 7-year-old boy, from the viewpoint of orthodontics. From lateral cephalometric head film analysis, remarkable retardation of the anterior subcranial base, infraorbitale, and maxilla were notable, as was vertical growth restriction of the maxilla. The choana blockade tendency was also recognized.
    Moreover, although reverse occlusion was present, a mandibular retrognathic tendency was also present, and a short ramus mandible, remarkable mandibular vertical growth pattern, and skeletal open bite were present. In the dentition, two of the lower incisors were missing, and the present lower incisors were large. Maxillary and mandibular first molars were delayed in eruption.
    For treatment, the solutions to such remarkable skeletal problems were limited by the insufficiency of recovery of cranial formation after the operation. We planned a non-surgical treatment to expand the maxilla.
    It will be necessary to continually consider the treatment of his malocclusion as he continues to grow.
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  • KENICHI MATSUZAKA, TAKAHIKO SHIBAHARA, SATOSHI MURAKAMI, DONG-HO LEE, ...
    Article type: Others
    Subject area: Others
    2004 Volume 45 Issue 2 Pages 95-98
    Published: 2004
    Released on J-STAGE: July 15, 2005
    JOURNAL FREE ACCESS
    This case report describes an acinic cell carcinoma found by a recurrence of a ranula in the sublingual gland. A 42-year-old male was admitted to the hospital of the Tokyo Dental College with a swelling in his right oral floor but without pain. The lesion was treated by windowing the same day under the diagnosis of a ranula, but the swelling appeared again at the same area eight months after the first operation. A resection was performed, and the specimen was sent to the clinical laboratory for pathological diagnosis. Proliferating serous cells were seen in part of the wall of an exudative mucous cyst. PAS staining was partially positive, and immunohistochemical staining for S-100 protein, lactoferrin, and amylase were also positive in cytoplasmic granules. This report concludes that the pathological diagnosis is beneficial in clarifying the reasons for the recurrence of a benign lesion.
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Clinical Report
  • YUKIO KITAFUSA
    Article type: Others
    Subject area: Others
    2004 Volume 45 Issue 2 Pages 99-108
    Published: 2004
    Released on J-STAGE: July 15, 2005
    JOURNAL FREE ACCESS
    We examined the feasibility of applying the Dental Prescale Occluzer SystemTM to the evaluation of occlusion in orthodontic patients. The patients were classified according to the type of malocclusion or facial pattern. The values of occlusal contact area and occlusal force obtained from these individuals differed depending on the type of occlusion or facial pattern. These values were higher in individuals with normal occlusion than in patients with malocclusion and higher in patients with the Brachyo facial pattern than in those with the Dolico facial pattern. Because this system can very easily analyze the occlusal contact area, the mean pressure on each occlusal contact point, and the occlusal force during the process of orthodontic treatments, it can be useful as an aid for the initial diagnosis of occlusal problems, the observation of the changes in occlusion during treatment, and the establishment of the final goal of orthodontic treatments.
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