不同后牙固定桥材料的临床应用

背景：在后牙固定桥材料的选择上尚存争议,氧化锆全瓷冠、金铂合金烤瓷冠与镍铬合金烤瓷冠各具优点与不足。目的：比较Lava氧化锆全瓷、金铂合金烤瓷与镍铬合金烤瓷后牙固定桥辅以纤维桩、树脂核修复后牙牙列缺损的临床效果。方法：选择120例下颌第一磨牙缺失患者,分别应用Lava氧化锆全瓷后牙固定桥、金铂合金烤瓷与镍铬合金烤瓷后牙固定桥并辅以纤维桩、树脂核修复后牙牙列缺损,比较3种修复体的修复效果。结果与结论：通过6-48个月的随访发现,在牙龈边缘着色、龈缘密合度、修复体颜色、修复体周围龋方面Lava氧化锆全瓷冠和金铂合金烤瓷冠的修复效果优于镍铬合金烤瓷冠,其中Lava氧化锆全瓷冠的牙龈边缘着色和修复体颜色优于金铂合金烤瓷冠,而金铂合金烤瓷冠的龈缘密合度好于Lava氧化锆全瓷冠。在修复体折裂程度方面镍铬合金烤瓷冠低于Lava氧化锆全瓷冠和金铂合金烤瓷冠,但镍铬合金烤瓷修复者牙龈指数和基牙松动程度最高,牙龈健康程度最差,Lava氧化锆全瓷冠和金铂合金烤瓷冠比较以上指标差异无显著性意义。由此可见,在后牙固定桥修复体种类的选择上,Lava氧化锆全瓷冠和金铂合金烤瓷冠是较为理想的修复体;前者在生物相容性方面具有一定的优越性,而后者在边缘密合性方面更具优势。

Clinical application of different posterior fixed bridge materials

BACKGROUND： Studies have shown that zirconia alloy ceramic crowns, gold-platinum alloy ceramic crowns and nickel-chromium alloy ceramic crown have certain strengths and weaknesses, so there is a controversy on the selection of the materials applied to the posterior tooth fixed restoration. OBJECTIVE： To compare the clinical effect of Lava zirconia fixed bridge, goal-platinum alloy ceramic fixed bridge and nickel-chromium alloy ceramic fixed bridge supplemented by fiber posts and resin core used in the posterior column defects. METHODS： 120 patients with mandibular first molar missing were treated with Lava zirconia, goal-platinum alloy ceramic and nickel-chromium alloy ceramic fixed bridge supplemented by fiber posts and resin core for posterior column defects. The restorative effects of three prostheses were compared. RESULTS AND CONCLUSION： Clinical indicators of test results of 6 48 months follow-up showed that the gingival edge coloring, gingival margin microleakage, the color of prosthesis and the caries around prosthesis of Lava zirconia alloy ceramic crowns and gold-platinum alloy ceramic crowns were better than those of nickel-chromium alloy ceramic crowns, and the gingival edge coloring and the color of prosthesis of Lava zirconia alloy ceramic crowns were better than those of gold-platinum alloy ceramic crowns, while the gingival margin microleakage of gold-platinum alloy ceramic crowns was better than that of Lava zirconia alloy ceramic crowns. Nickel-chromium alloy ceramic crowns were lower than Lava zirconia ceramic crowns and gold-platinum alloy ceramic crowns in the fracture extent. Gingival index clinical