【摘要】：目的： 研究鈦合金、鈷鉻合金及純鈦在不同NaCl濃度人工唾液中的耐腐蝕性。 方法： 三種金屬各鑄造18件經(jīng)統(tǒng)一表面處理后平均分為兩大組，一組測(cè)量了3種金屬在不同NaCl濃度(0.9%、2.0%、3.0%)的人工唾液中的電化學(xué)阻抗譜，根據(jù)等效電路的擬合結(jié)果得出溶液電阻(Rs)、電荷傳遞電阻(Rct)、鈍化膜電阻（RP）、雙電層電容（CPEdl）、鈍化膜電容（CPEP）、界面雙電層彌散指數(shù)（ndl)和鈍化膜雙電層彌散指數(shù)（np）的值。另一組測(cè)量了三種金屬浸泡3周后表面粗糙度的變化，并用場(chǎng)發(fā)射掃描電鏡（FESEM）觀察腐蝕前后的表面形貌，對(duì)實(shí)驗(yàn)結(jié)果進(jìn)行單因素方差分析。 結(jié)果： 1.電化學(xué)阻抗實(shí)驗(yàn)： 1)3種金屬的Rs、Rct、Rp、np隨著氯濃度的增加而減小，CPEp隨著氯濃度的增加而增加,CPEdl、ndl無(wú)明顯規(guī)律性。 2）鈦合金組：0.9％NaCl濃度組與2.0％NaCl濃度組和3.0％NaCl濃度組的ndl值、CPEp值兩兩比較無(wú)統(tǒng)計(jì)學(xué)差異(P0.05)，其余均有統(tǒng)計(jì)學(xué)差異(P0.05)；鈷鉻合金組：0.9％NaCl濃度組與2.0％NaCl濃度組和3.0％NaCl濃度組的ndl值兩兩比較無(wú)統(tǒng)計(jì)學(xué)差異(P0.05)，0.9％NaCl濃度組與2.0％NaCl濃度組的Rct值比較無(wú)統(tǒng)計(jì)學(xué)差異(P0.05)，其余均有統(tǒng)計(jì)學(xué)差異(P0.05)；純鈦組：0.9％NaCl濃度組與2.0％NaCl濃度組和3.0％NaCl濃度組的ndl值、Rct值兩兩比較無(wú)統(tǒng)計(jì)學(xué)差異(P0.05)，其余均有統(tǒng)計(jì)學(xué)差異(P0.05)。 3)三種金屬比較，在NaCl濃度為0.9％、2.0％和3.0％的人工唾液中，鈦合金、鈷鉻合金、純鈦的Rs值、ndl值、np值兩兩比較無(wú)統(tǒng)計(jì)學(xué)差異(P0.05)，其余均有統(tǒng)計(jì)學(xué)差異(P0.05)。 2.浸泡腐蝕實(shí)驗(yàn)： 金屬試件在不同NaCl濃度人工唾液浸泡后表面均發(fā)生腐蝕，表面粗糙度均增加。在含0.9％NaCl的人工唾液中浸泡后，純鈦和鈷鉻合金的表面粗糙度與其浸泡前相比無(wú)統(tǒng)計(jì)學(xué)差異(P0.05)；鈷鉻合金與純鈦相比差異無(wú)統(tǒng)計(jì)學(xué)意義(P0.05)，，NaCl濃度為2.0%與0.9%相比，3.0%與2.0%相比，純鈦的表面粗糙度差異無(wú)統(tǒng)計(jì)學(xué)差異(P0.05)；其余均有統(tǒng)計(jì)學(xué)意義(P0.05)。 結(jié)論： 1三種金屬的耐蝕性隨NaCl濃度的升高而降低。 2在相同NaCl濃度的人工唾液中，純鈦的耐蝕性最好，鈷鉻合金次之，鈦合金最差。 3嗜咸飲食的患者，不宜選用鈦合金，可考慮選用純鈦和鈷鉻合金；口腔中有這三種金屬修復(fù)體的患者，均不宜長(zhǎng)時(shí)間嗜咸飲食。
[Abstract]:Objective: to study the corrosion resistance of titanium alloy, cobalt chromium alloy and pure titanium in artificial saliva with different concentrations of NaCl. Methods: 18 cast pieces of three kinds of metals were divided into two groups after uniform surface treatment. The electrochemical impedance spectra of three kinds of metals in artificial saliva of different NaCl concentration (0.920% ~ 3.0%) were measured. The solution resistance (Rs), charge transfer resistance (Rct), passivated film resistor (RP), double layer capacitance (CPEdl), passivated film capacitance (CPEP), is obtained according to the fitting results of equivalent circuit. The interfacial double layer dispersion index (ndl) and the passivation film double layer dispersion index (np) are obtained. Another group measured the change of surface roughness after three kinds of metal immersion for 3 weeks. The surface morphology before and after corrosion was observed by field emission scanning electron microscope (FESEM). The results were analyzed by single factor variance analysis. Results: 1. Electrochemical impedance experiment: 1) the Rs,Rct,Rp,np of the three metals decreases with the increase of chlorine concentration, and the CPEp increases with the increase of chlorine concentration. CPEdl,ndl has no obvious regularity. 2) Titanium alloy group: there was no significant difference in ndl value and CPEp value between 0.9%NaCl group and 2.0%NaCl group and 3.0%NaCl group (P0.05). Co-Cr alloy group: there was no significant difference in ndl value between 0.9%NaCl group and 2.0%NaCl group and 3.0%NaCl group (P0.05). There was no significant difference in Rct between the 0.9%NaCl group and the 2.0%NaCl group (P0.05), but there was significant difference in the rest (P0.05). Pure titanium group: the ndl value, Rct value of 0.9%NaCl group, 2.0%NaCl concentration group and 3.0%NaCl concentration group had no statistical difference (P0.05), the rest had statistical difference (P0.05). 3) in the artificial saliva with NaCl concentration of 0.9% and 3.0%, the Rs value, ndl value, np value of titanium alloy, cobalt chromium alloy, pure titanium were not significantly different (P0.05). The rest were statistically different (P0.05). 2. Immersion corrosion test: after immersion in artificial saliva with different NaCl concentration, the surface of the metal specimen was corroded and the surface roughness increased. After immersion in artificial saliva containing 0.9%NaCl, the surface roughness of pure titanium and cobalt chromium alloy was not significantly different from that before immersion (P0.05). There was no significant difference between cobalt-chromium alloy and pure titanium (P0.05), NaCl concentration was 2.0% vs 0.9%, 3.0% vs 2.0%, the surface roughness of pure titanium had no statistical difference (P0.05). The rest were statistically significant (P0.05). Conclusion: 1 the corrosion resistance of three metals decreases with the increase of NaCl concentration. 2 in the same NaCl concentration of artificial saliva, the corrosion resistance of pure titanium is the best, cobalt chromium alloy is the second, and titanium alloy is the worst. (3) Titanium alloy should not be used in salty diet, pure titanium and cobalt-chromium alloy should be considered, and those with these three metal restorations in oral cavity are not suitable for long term salty diet.
【學(xué)位授予單位】：南昌大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：R783.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 司家文;胡啟凡;張東升;劉桂軍;左書(shū)玉;;純鈦表面TiO_2、ZrO_2復(fù)合涂層在人工唾液中的電化學(xué)腐蝕[J];口腔頜面修復(fù)學(xué)雜志;2012年01期

2 胡濱;陳潔;張富強(qiáng);;鈦硅涂層對(duì)鈷鉻合金耐腐蝕性能的影響[J];上�？谇会t(yī)學(xué);2011年06期

3 于衛(wèi)強(qiáng);邱憬;張富強(qiáng);;鈦表面陽(yáng)極氧化膜的腐蝕行為研究[J];華西口腔醫(yī)學(xué)雜志;2011年02期

4 司家文;胡啟凡;孫惠強(qiáng);;種植體表面抗菌涂層技術(shù)[J];口腔頜面修復(fù)學(xué)雜志;2011年02期

5 吳峻嶺;張強(qiáng);王新洪;;激光表面強(qiáng)化技術(shù)對(duì)牙用鑄造合金耐腐蝕性能影響的研究[J];華西口腔醫(yī)學(xué)雜志;2010年05期

6 蘇潤(rùn)剛;張麗娟;李春華;;氯離子濃度對(duì)牙科鉻合金耐腐蝕性能的影響[J];口腔醫(yī)學(xué);2010年08期

7 田國(guó)兵;武峰;李金陸;張并生;楊圣輝;李倩;;兩種冠修復(fù)材料與變形鏈球菌粘附的關(guān)系[J];北京口腔醫(yī)學(xué);2010年02期

8 蘇潤(rùn)剛;李春英;孫立靜;;人工唾液中氯化鈉濃度對(duì)鈷鉻、鎳鉻、含鈦鎳鉻合金腐蝕行為的影響[J];口腔醫(yī)學(xué)研究;2010年02期

9 蘇潤(rùn)剛;李春華;錢燁;;牙科用鉻合金在不同pH值的人工唾液中耐腐蝕性能的研究[J];華西口腔醫(yī)學(xué)雜志;2010年01期

10 黃麗娟;李建;景雙林;韓霖霏;;兩種表面改性方法對(duì)鈷-鉻合金耐腐蝕性能的影響[J];實(shí)用口腔醫(yī)學(xué)雜志;2009年03期

相關(guān)碩士學(xué)位論文 前1條

1 張媛媛;pH值與Cl~-濃度對(duì)純鈦及鈷鉻合金耐腐蝕性能的影響[D];中南大學(xué);2012年

本文編號(hào)：2399786