Development of artificial tooth root by the Zirconia ceramics

氧化锆陶瓷人工牙根的研制

• 批准号: 59870063
• 负责人: SEKINE Hiromu
• 金额: $ 4.22万
• 依托单位: Tokyo Dental College
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1984
• 资助国家: 日本
• 起止时间: 1984 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59870063/
• 关键词: Zirconia ceramics; Artificial tooth root; Biological compatibility; Mechanical property; Hist-pathorogical study; 病理・組織検索; インプラント; カニクイザル; 病理組織反応; 機能圧

For the sake of clearifying the fundemental property of the artificial tooth root of the zirconia-ceramics, Histo-pathorogical aspects on the zirconia-ceramics dental implant and mechanical property of the zirconia-ceramics pin were studied.1.The zirconia-ceramics pins with 3 mm in diameter and 25 mm in length were made, and they were implanted on the residual ridge of lower molar region of male monkeys two months after extraction of teeth. Pathological examination was taken two months after implantation of them.1)Peri-implant tissues were distinguished from the normal tooth periodontium by newly tissue elements. And so called thick fibrous capsulation almost never appeared at the interface of the implant body. 2)The zirconia-ceramics implant bodies directly contacted the implant supporting bone. And it is also observed that the Harvers canal were constructed with the newly bone tissue and implant body.2.The materials of the investigation were collum of 4 mm in diameter and 40 mm in length, and they grinded the screw with 0.5 mm in depth and 1.25 mm in pitch, The shapes of grinding cutter were 5 kinds. The cantilever loading and three point bending were studied on the load required to crush them. 1)The strength of the pin of 4 mm in diameter of the zirconia-ceramics decreases on the grinding to the screw with 0.5 mm in depth for about 50% of the pin of 3 mm in diameter, however, the strength is a little difference on the shapes of grinding cutter. 2)The strength showed about 16 kgf on the load of cantilever stress, and it may be bear about three times on the load of poly-crystal alumina-ceramics.

为了明确氧化锆陶瓷人工牙根的基本性质，对氧化锆陶瓷种植体的组织病理学和氧化锆陶瓷针的力学性能进行了研究。制作直径为3mm，长度为25mm的氧化锆陶瓷别针，在公猴拔牙2个月后植入其下磨牙区残脊。植入2个月后进行病理检查。1)种植体周围组织通过新生组织元素与正常牙周组织区分。而所谓的厚纤维包膜几乎从不出现在种植体的交界面。2)氧化锆陶瓷种植体直接与种植体支撑骨接触。同时观察到新生的骨组织和种植体形成了Harvers管。研究材料为直径为4mm、长度为40mm的圆柱，对螺杆进行深度为0.5 mm、节距为1.25 mm的磨削，磨削刀具形状为5种。对悬臂载荷和三点弯曲载荷进行了研究。1)直径为4mm的氧化锆陶瓷销对直径为3mm的螺杆进行磨削时，直径为0.5 mm的氧化锆陶瓷销的强度比直径为3mm的氧化锆陶瓷销的强度降低50%左右，但在磨削刀具形状上，其强度差异不大。2)在悬臂应力载荷下，其强度约为16 kgf，在多晶氧化铝陶瓷载荷下，其强度可承受约3倍。

项目成果

永井孝之,竹下信義,丸山晴義,関根弘,岸正孝,今村嘉宣: 日本補綴歯科学会雑誌. 29. 494 (1984)

Takayuki Nagai、Nobuyoshi Takeshita、Haruyoshi Maruyama、Hiroshi Sekine、Masataka Kishi、Yoshinori Imamura：日本口腔修复学会杂志 29. 494 (1984)。

N. Nagai, N. Takeshita, H. Maruyama, H. Sekine, M. Kishi and Y. Imamura: "Basic study on the application of artificial tooth root of Zirconia ceramics 2nd report, Periimplant tissues of endosseous implant" The Journal of the Japan Prosthodontic Society (

N. Nagai、N. Takeshita、H. Maruyama、H. Sekine、M. Kishi 和 Y. Imamura：“氧化锆陶瓷人工牙根应用的基础研究第二次报告，骨内种植体的种植体周围组织” The Journal of the Journal of the Journal of the

永井教之,竹下信義,林順滋,西嶋克巳,友沢基,関根弘,岸正孝,今村嘉宣: インプラント誌. 6. 111 (1984)

Noriyuki Nagai、Nobuyoshi Takeshita、Junji Hayashi、Katsumi Nishijima、Hajime Tomozawa、Hiroshi Sekine、Masataka Kishi、Yoshinori Imamura：种植杂志。 6. 111 (1984)

永井教之,竹下信義,林順滋,関根弘,岸正孝,小宮山彌太郎,今村嘉宣,藤井洋治: 歯科学報. 83. 765-766 (1983)

Noriyuki Nagai、Nobuyoshi Takeshita、Junji Hayashi、Hiroshi Sekine、Masataka Kishi、Yataro Komiyama、Yoshinobu Imamura、Yoji Fujii：牙科杂志 83. 765-766 (1983)。

永井教之,竹下信義,林順滋,秋場道保,関根弘,岸正孝,今村嘉宣: 歯科学報. 84. 721 (1984)

Noriyuki Nagai、Nobuyoshi Takeshita、Junji Hayashi、Michiyasu Akiba、Hiroshi Sekine、Masataka Kishi、Yoshinori Imamura：牙科报告 84. 721 (1984)。