Retentive force characteristics of electroformed telescope crowns
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概要
- 論文の詳細を見る
We evaluated the retentive force characteristics of electroformed telescope crowns by analyzing the retentive force-displacement curve during vertical dislodgement using a tensile testing machine. The inner crown was made of gold alloy with 0, 2, 4 or 6 degrees of taper between the axial surface and the principal axis of the abutment tooth. Five outer crowns were made by electroforming on the same inner crown, and tensile tests were done five times on each sample. We measured the displacement before (DBP) and after (DAP) the peak retentive force, and calculated the retentive energy before (EBP) and after (EAP) the peak. All measurements were performed with and without the interposition of artificial saliva. We found that the retentive force was augmented significantly by the interposition of artificial saliva. The retentive force of the electroformed telescope crown was significantly greater with 2 degrees of taper than with 6 degrees. DBP and EBP were both significantly greater at 0 degrees than at 2, 4, or 6 degrees. In addition, DAP of the 2 degree crown was significantly greater than the other values. EAP of the 0 and 2 degree crowns was significantly greater than that of the 4 and 6 degree crowns. The peak retentive force, DBP, DAP and EBP of the 2 degree crowns were comparable to magnetic attachments. We concluded that the 2 degree electroformed telescope crown could be used as an effective retainer for the protection of abutment teeth.
- 大阪歯科学会の論文
著者
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Nishizaki Hiroshi
Department of Removable Prosthodontics and Occlusion, Osaka Dental University
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Kawashima Izumi
Department of Removable Prosthodontics and Occlusion, Osaka Dental University
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INOUE Hiroshi
Department of Internal Medicine, University of Toyama
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Nishizaki Hiroshi
Department Of Removable Prosthodontics And Occlusion Osaka Dental University
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Nishizaki Hiroshi
大阪歯科大学 欠損歯列補綴咬合学
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Kawashima Izumi
Graduate School of Dentistry (Removable Prosthodontics and Occlusion), Osaka Dental University
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Nishizaki Hiroshi
Department Of Fermentation Technology Faculty Of Engineering Hiroshima University
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Kawashima Izumi
Department Of Removable Prosthodontics And Occlusion Osaka Dental University
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Inoue Hiroshi
Department Of Electrical And Electronic Engineering Akita University
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Nakamura Hiromasa
Graduate School Of Dentistry (removable Prosthodontics And Occlusion) Osaka Dental University
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Nishizaki Hiroshi
Osaka Dental Univ. Osaka Jpn
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Inoue Hiroshi
Departmcnt Of Biology Faculty Of Science Kyushu University:(present)department Of Biology Kyushu Den
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Inoue Hiroshi
Deparment of Neurosurgery, Gunma University School of Medicine and Gamma Unit Center, Hidaka Hospital
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