Dental Journal of Iwate Medical University
Online ISSN : 2424-1822
Print ISSN : 0385-1311
ISSN-L : 0385-1311
Current issue
Displaying 1-7 of 7 articles from this issue
Case reports
  • Tadashi KAWAI, Naoko TSUNODA, Yuko KOMATSU, Taifu HIRANO, Soko NISHIHI ...
    Article type: case-report
    2021 Volume 46 Issue 2 Pages 85-90
    Published: December 06, 2021
    Released on J-STAGE: January 27, 2022
    JOURNAL FREE ACCESS

    Methemoglobinemia is a known complication of local anesthesia use in dental treatment. Methemoglobin reduces oxygen carrying capacity. This report presents a case of methemoglobinemia due to Citanest and Octapressin® use for mandibular fracture treatment. A 68-year-old man with a diagnosis of mandibular fracture received an intermaxillary fixation before fracture surgery. Then, Citanest and Octapressin® was used. A total amount of propitocaine was 324 mg. After moving to the operating room, oxygen saturation of peripheral artery decreased. Methemoglobin increased to 6.4% from arterial blood gas analysis, suggesting methemoglobinemia. After that, it improved with oxygen therapy. It is suggested that methemoglobinemia should be noted when using large amounts of propitocaine.

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  • Soko NISHIHIRA, Kenichi NABESHIMA, Taifu HIRANO, Naoko TSUNODA, Tadash ...
    Article type: case-report
    2021 Volume 46 Issue 2 Pages 91-96
    Published: December 06, 2021
    Released on J-STAGE: January 27, 2022
    JOURNAL FREE ACCESS

    Static bone cavity was first reported by Stafne in 1942. In most cases, the static bone cavity occurs in the posterior region of the mandible. We report a case of static bone cavity found in the anterior region of the mandible. A 39-year-old man was referred to our hospital for examination of radiolucency in the right mandible. On intra-oral examination, mucosal depression was found in the lingual side of the anterior mandible. The color of overlying mucosa was normal. Abnormal mobilities and percussion pains were not recognized on the right lower incisors, canine, and premolars. Electric pulp test revealed positive responses on these teeth. A panoramic radiograph showed a well-defined oval radiolucency including the apex of the right lower canine and first premolar. A finding from CT showed a bone defect on the lingual side of the anterior mandible. Based on these findings, the diagnosis of a static bone cavity was made. The patient has been followed up. Static bone cavity rarely occurs in the anterior part of the mandible. In such cases, differentiation from odontogenic cysts and neoplastic lesions is required. In the present case, we could directly see the depression of the bone, however, CT would be useful to differentiate static bone cavity from other lesions.

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  • Yuto SASAMURA, Atsushi OGAWA, Noriaki TAKAHASHI, Yumiko YOSHIDA, Shint ...
    Article type: case-report
    2021 Volume 46 Issue 2 Pages 97-105
    Published: December 06, 2021
    Released on J-STAGE: January 27, 2022
    JOURNAL FREE ACCESS

    Reports of ectopic impaction of mandibular premolars are rare. We experienced four cases of ectopically impaction of the mandibular premolars, and we report the details including a review of the literature. In the past three years, panoramic X-ray photography and dental cone-beam CT were taken at our hospital, and there were four cases of adult ectopic impacted mandibular premolars. The outline of the cases was three males and 1 female aged 33 to 64 years, 1 on the right side and three on the left side. All cases were horizontally impacted and had a movement amount of about tooth or more, and the movement direction was distal in all cases. Since it is necessary to avoid the roots of the existing teeth for movement, the roots inclination was large in cases with a large amount of movement.

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