Katic Visnja, Curkovic Lidija, Bosnjak Magdalena Ujevic, Peros Kristina, Mandic Davor, Spalj Stjepan
Department of Orthodontics, Faculty of Medicine, University of Rijeka.
Dent Mater J. 2017 Mar 31;36(2):149-156. doi: 10.4012/dmj.2016-169. Epub 2017 Jan 20.
Aim was to determine effect of pH, fluoride (F) and hydrofluoric acid concentration (HF) on dynamic of nickel (Ni) and titanium (Ti) ions release. Nickel-titanium wires with untreated surface (NiTi), rhodium (RhNiTi) and nitride (NNiTi) coating were immersed once a week for five min in remineralizing agents, followed by immersion to artificial saliva. Ion release was recorded after 3, 7, 14, 21 and 28 days. Pearson correlations and linear regression were used for statistical analysis. Release of Ni from NiTi and NNiTi wires correlated highly linearly positively with HF (r=0.948 and 0.940, respectively); for RhNiTi the correlation was lower and negative (r=-0.605; p<0.05). The prediction of Ti release was significant for NiTi (r=0.797) and NNiTi (r=0.788; p<0.05) wire. Association with F was lower; for pH it was not significant. HF predicts the release of ions from the NiTi wires better than the pH and F of the prophylactic agents.
目的是确定pH值、氟化物（F）和氢氟酸浓度（HF）对镍（Ni）和钛（Ti）离子释放动态的影响。将未经处理表面的镍钛丝（NiTi）、铑涂层镍钛丝（RhNiTi）和氮化物涂层镍钛丝（NNiTi）每周浸入再矿化剂中一次，每次5分钟，然后浸入人工唾液中。在3、7、14、21和28天后记录离子释放情况。采用Pearson相关性分析和线性回归进行统计分析。NiTi丝和NNiTi丝中Ni的释放与HF呈高度线性正相关（分别为r = 0.948和0.940）；对于RhNiTi丝，相关性较低且为负相关（r = -0.605；p < 0.05）。对于NiTi丝（r = 0.797）和NNiTi丝（r = 0.788；p < 0.05），Ti释放的预测具有显著性。与F的相关性较低；与pH值的相关性不显著。HF比预防剂的pH值和F值能更好地预测NiTi丝中离子的释放。
