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In addition, we examined the pulp cavity of this tooth three dimensionally without damageing the tooth using micro focus computed tomography (following Micro- CT). A left upper first premolar was obtained from a male (aged 12 yrs 7 mths) as a convenience extraction for orthodontic purposes. The subject\u0027s medical history was unremarkable. In the subject\u0027s family history, the mother also had a convenience extraction of upper and lower first premolar for orthodontic purposes when she was 16 yrs and 6 mths of age. The details of the extracted tooth were measured using vernier calipers (1/20 mm), and compared with the Japanese mean. Cystography by Micro-CT (SMX-225CT, Shimadzu Co.) was performed in the mesio-distal direction with a canal voltage of 85KV and a canal current of 300 uA. A two dimensional slice image of 20 um thickness was obtained, and transformed into a three dimensional reconstruction image of the contours and cavity of the tooth using the volume rendering method. Our results indicate that the left upper first premolar examined in this study was larger than the Japanese mean previously reported. Although no difference was observed between average Japanese tooth form and our observation of the fundamental configuration of the anatomical tooth crown, a longitudinal sulcus on the root trunk of the buccal side had acervical enamel projection on its surface. During the development of the teeth, the root trunk is formed at the end of the enamel formation, and the configuration of the tooth root is already determined by the cervical enamel projection. Our observations do not address whether the existence of the longitudinal sulcus promotes the formation of the enamel projection or vice versa. We confirmed by Micro-CT that this premolar had three root canals, with two horns of the pulp chamber on the buccal and lingual side. Therefore, while the horns of the pulp chamber resembled an upper premolar, the floor of the pulp chamber resembled an upper molar. Our results suggest that the cervical enamel projection onto the root trunk of the buccal side may induce a bifurcation of the buccal root in a mesio-distal direction.", "subitem_description_type": "Other"}]}, "item_2_source_id_13": {"attribute_name": "雑誌書誌ID", "attribute_value_mlt": [{"subitem_source_identifier": "AN00017474", "subitem_source_identifier_type": "NCID"}]}, "item_2_text_10": {"attribute_name": "著者所属(英)", "attribute_value_mlt": [{"subitem_text_language": "en", "subitem_text_value": "First Department of Oral Anatomy, School of Dentistry, Iwate Medical University"}, {"subitem_text_language": "en", "subitem_text_value": "First Department of Oral Anatomy, School of Dentistry, Iwate Medical University"}, {"subitem_text_language": "en", "subitem_text_value": "First Department of Oral Anatomy, School of Dentistry, Iwate Medical University"}, {"subitem_text_language": "en", "subitem_text_value": "Nakano Orthodontic Clinic"}, {"subitem_text_language": "en", "subitem_text_value": "Kikuzuki Dental Office"}, {"subitem_text_language": "en", "subitem_text_value": "First Department of Oral Anatomy, School of Dentistry, Iwate Medical University"}]}, "item_2_text_2": {"attribute_name": "記事種別(日)", "attribute_value_mlt": [{"subitem_text_value": "症例"}]}, "item_2_text_3": {"attribute_name": "記事種別(英)", "attribute_value_mlt": [{"subitem_text_language": "en", "subitem_text_value": "Case report"}]}, "item_2_text_9": {"attribute_name": "著者所属(日)", "attribute_value_mlt": [{"subitem_text_value": "岩手医科大学歯学部口腔解剖学第一講座"}, {"subitem_text_value": "岩手医科大学歯学部口腔解剖学第一講座"}, {"subitem_text_value": "岩手医科大学歯学部口腔解剖学第一講座"}, {"subitem_text_value": "なかの矯正歯科"}, {"subitem_text_value": "菊月歯科医院"}, {"subitem_text_value": "岩手医科大学歯学部口腔解剖学第一講座"}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2002-08-19"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "KJ00002373848.pdf", "filesize": [{"value": "517.5 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensefree": "Creative Commons : 表示 - 非営利 - 改変禁止", "licensetype": "license_free", "mimetype": "application/pdf", "size": 517500.0, "url": {"label": "KJ00002373848", "url": "https://iwatemed.repo.nii.ac.jp/record/1630/files/KJ00002373848.pdf"}, "version_id": "b8a12087-7766-4505-9447-5f0169498218"}]}, "item_keyword": {"attribute_name": "キーワード", "attribute_value_mlt": [{"subitem_subject": "upper first premolar with three roots", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "cervical enamel projection", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "micro focus computed tomography", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "pulp cavity", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "three dimensional reconstruction", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "departmental bulletin paper", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "3根を有する上顎第一小臼歯の一例", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "3根を有する上顎第一小臼歯の一例"}, {"subitem_title": "A case report of an upper first premolar with three roots", "subitem_title_language": "en"}]}, "item_type_id": "2", "owner": "5", "path": ["124", "396"], "permalink_uri": "https://iwatemed.repo.nii.ac.jp/records/1630", "pubdate": {"attribute_name": "公開日", "attribute_value": "2002-08-19"}, "publish_date": "2002-08-19", "publish_status": "0", "recid": "1630", "relation": {}, "relation_version_is_last": true, "title": ["3根を有する上顎第一小臼歯の一例"], "weko_shared_id": 5}
3根を有する上顎第一小臼歯の一例
https://iwatemed.repo.nii.ac.jp/records/1630
https://iwatemed.repo.nii.ac.jp/records/163063426ab2-24c0-4560-8b02-af717a5014a3
名前 / ファイル | ライセンス | アクション |
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KJ00002373848 (517.5 kB)
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Creative Commons : 表示 - 非営利 - 改変禁止
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2002-08-19 | |||||
タイトル | ||||||
タイトル | 3根を有する上顎第一小臼歯の一例 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | A case report of an upper first premolar with three roots | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
記事種別(日) | ||||||
症例 | ||||||
記事種別(英) | ||||||
en | ||||||
Case report | ||||||
著者名(日) |
長門, 里美
× 長門, 里美× 小野寺, 政雄× 藤村, 朗× 中野, 廣一× 菊月, 圭吾× 野坂, 洋一郎 |
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著者名よみ |
ナガト,サトシ,オノデラ,マサオ,フジムラ,アキラ,ナカノ,ヒロカズ,キクズキ,ケイゴ,ノザカ,ヨウイチロウ
× ナガト,サトシ,オノデラ,マサオ,フジムラ,アキラ,ナカノ,ヒロカズ,キクズキ,ケイゴ,ノザカ,ヨウイチロウ |
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雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00017474 | |||||
書誌情報 |
岩手医科大学歯学雑誌 en : Dental journal of Iwate Medical University 巻 27, 号 2, p. 87-92, 発行日 2002-08-19 |