J Jpn Prosthodont Soc 51: 11-21, 2007 Analysis of Polished Surfaces of Titanium Castings Miura Eiji, Takayama Yasuko, Kawai Yoshiyuki, Hosoi Toshio an

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J Jpn Prosthodont Soc 51: 11-21, 2007 Analysis of Polished Surfaces of Titanium Castings Miura Eiji, Takayama Yasuko, Kawai Yoshiyuki, Hosoi Toshio and Mizuno Yukihiro* The First Department of Prosthetic Dentistry, Tsurumi University School of Dental Medicine * D ental Technician Training Institute, Tsurumi University School of Dental Medicine Received on April 28, 2006/Accepted on November 6, 2006

Polishing methods of Titanium

Polishing methods of control for mirror finishing Polishing methods of control for inner

The roughness (Ra) Qualitative analysis of abrasive materials Qualitative analysis of each specimens

sections specimen Vickers hardness cross section as cast Ti

7) Jang KS, Youn SJ, KimYS. Comparison of Castability and Surface Roughness of Commercially Pure Titanium and Cobalt-chromium Denture Frameworks. J Prothet Dent. 86: 93-98, 2001. 8) Guilherme AS, Henriques GEP, Zavanelli RA et al. Surface roughness and fatigue performance of commercially pure titanium and Ti-6A1-4V alloy after different polishing protocols. J Prothet Dent. 93: 378-385, 2005. FAX: 045-573-9599 E-mail: miura-e@tsurumi-u. ac. jp

チ タン研 磨面 の表 面分析 図4 map analysis チ タ ンas cast試 Ti as casts 図5 段 左 か らSi,P,Caの map analysis を示す map analysis Ti inner 上 段 左 か らCOMPO像,Ti,下 段 左 か らNa,Mg, Ti mirror finishing 段 左 か らAl,Siの 分析像 を示 す 分 析 像 を示 す チ タ ン鏡 面 研 磨 面 の 面 分 析 像 上 段 左 か らCOMPO像,Ti,下 チ タ ン適 合 研 磨 面 の 面 分 析 像 料 の面 分析像 上 段 左 か らCOMPO像,Ti,O,中 Al,下 図6 specimen 19 図7 map analysis Au-Pt inner 白 金 加 金 適 合研 磨 面 の 面 分 析 像 段 左 か らAl,Siの 分析像 上 段 左 か らCOMPO像,C,O,中 Ag,下 段 左 か らPt,Auの 段 左 か らCu,Pd, 分 析 像 を示 す

20 図8 補 綴 誌51巻1号(2007) map analysis Co-Cr inner コ バ ル トク ロ ム 適 合 研 磨 面 の 面 分 析 像 上 段 左 か らC0MPO像,N,F,中 図10 Ti mirror 段 左 か らAl,Si,P, 下 段 左 か らCr,Co,Moの map and line analysis finishing cross section チ タ ン鏡 面 研 磨 面 の 断 面 試 料 の 面 お よ び 線 分 析 像 上 段 左 か らCOMPO像,Ti,下 分 析 像 を示 す 段 左 は0の 右 に 各 元 素 の 線 分 析 結 果 を 示 す.黄 分 析 で あ り,ラ イ ンがMINに で あ る.チ タ ン表 面 に は0も 面 分 析 像 で, 色 い ラ イ ン はTiの 線 なっ た とこ ろが 金属 最 表面 認 め られ な い.チ タ ン表 面 よ り右 側 は 包 埋 樹 脂 で あ る. 図9 map and line analysis cross sections Ti as casts 断面 試料 の面お よび線分析 像 上 段 左 か らCOMPO像,Ti,O,中 段 左 か らSi,Pの お い てAは Ti inner チ タ ンascastの Al,下 図11 チ タ ン,Bは 面 分 析 像 を 示 す.COMPO像 に示 され い ラ イ ン はTiの 線 分 析 で あ り,ラ イ ンがMINに なっ た とこ ろが金 属 最表 面 で あ る.こ の 境 界 部 に はMg,Al,O,Si等 の ラ イ ンの 上 昇 が み ら れ る. line analysis 上 段 左 か らTi,O,下 に て い る そ れ ぞ れ の 色 の ラ イ ン 間 の 線 分 析 を行 っ て い る.下 段 右 に 各 元 素 の 線 分 析 結 果 を 示 す.青 and cross section チ タ ン適 合 研 磨 面 の 断 面 試 料 の 面 お よび 線 分 析 像 段 左 か らNa,Mg, 埋 没 材 で あ る.Map上 map 段 左 はPの 面 分 析 像 で,右 素 の 線 分 析 結 果 を 示 す.青 い ラ イ ン はTiの ラ イ ンがMINに に各元 線 分 析 で あ り, な っ た と こ ろ が 金 属 最 表 面 で あ る,チ ン 表 面 に は わ ず か に0,Pの ラ イ ンの 上 昇 が 見 ら れ る. タ

Analysis of Polished Surfaces of Titanium Castings Miura Eiji, Takayama Yasuko, Kawai Yoshiyuki, Hosoi Toshio and Mizuno Yukihiro* The First Department of Prosthetic Dentistry, Tsurumi University School of Dental Medicine, *Dental Technician Training Institute, Tsurumi University School of Dental Medicine J Jpn Prosthodont Soc 51: 11-21, 2007 ABSTRACT Purpose The aim of this research was to obtain an objective grasp properties of titanium castings which are polished using a titanium polishing method developed by our university. Methods The specimens were cast conventionally using commercially pure (CP) titanium (Grade 3, T-alloy H, GC). The cast s were polished using two methods ; a conventional procedure for mirror s and a modified procedure consisting of minimal grinding foracceptable fit inner. The center line average roughness (Ra) wasmeasured, and then qualitative analysis and map analysis were performed using Electron Probe X-ray Microanalysis. In addition, map and line analysis on sections as-cast titanium specimens was performed, and the Vickers hardness was measured. As controls, Au-Pt alloy and Co-Cr alloy specimens were analyzed. Results The Ra on the titanium inner was 1.52,um, which was approximately four times higher than that on the mirror, and approximately two times higher than that for the Au-Pt alloy and Co-Cr alloy. The qualitative analysis titanium mirror detected elements such as C, Si, and Al as well as the ingot element. In addition, P was also detected on the titanium inner. The Vickers hardness was highest on the outermost layer, which decreased remarkably until a depth of 100-150 gm. Conclusions It was considered that the mirror formed by the titanium polishing method in our university obtained a level equivalent to that of precious metals. However, a reaction layer and elements derived from the investment material remained in the titanium inner. Key words polishing, titanium castings, inner,