BACKGROUND:Titanium zirconium niobium tin al oy (Ti-Zr-NB-Sn al oy) has good tissue structure, mechanical properties, corrosion resistance and biocompatibility, which is an ideal dental material. OBJECTIVE:To explore the efficacy and safety of Ti-Zr-NB-Sn al oy in dental restoration. METHODS:A retrospective analysis was performed on clinical data of 87 cases of dental defects, including 43 males and 44 females, aged 22-41 years. Of the 87 cases, 43 cases were repaired with Ti-Zr-NB-Sn al oy as observation group, and the other 44 cases were treated with nichrome as control group. After 36 months of fol ow-up, the therapeutic efficacy, dental restoration conditions, dental prosthesis conditions and patient satisfaction were observed and compared. RESULTS AND CONCLUSION:Al the 87 patients were fol owed up for 36 months. After the fol ow-up, the total effective rate and patient satisfaction were higher in the observation group than the control group (P<0.05). In the control group, there were four cases of swol en gums, four cases of bleeding gums, four cases of al ergies, three cases of gum gray line, and six cases of mucosal pain;in the observation group, there was only one case of swol en gums, and the dental restoration was better in the observation group than the control group (P<0.05). For the dental prosthesis, there were 10 cases of dental stent damage and 20 cases of dental stent loosening in the control group;and only one case of dental stent damage and one case of dental stent loosening in the observation, and the observation group was superior to the control group in the dental prosthesis (P<0.05). Experimental findings suggest that Ti-Zr-NB-Sn al oy for repair of dental defects has good biocompatibility and security.%背景：钛锆铌锡合金具有良好的组织结构、力学性能、耐蚀性能及生物相容性，是一种理想的口腔修复材料。目的：观察钛锆铌锡合金和镍铬合金在口腔修复中的效果和安全性。方法：纳入牙体缺损患者87例，其中男43例，女44例，年龄22-41岁，其中43例采用钛锆铌锡合金进行修复，作为观察组；44例采用镍铬合金修复，作为对照组。修复治疗结束后随访36个月，观察两组治疗效果、口腔修复情况、修复体情况及患者满意度。结果与结论：87例患者均完成36个月随访，观察组治疗总有效率、患者满意度高于对照组(P<0.05)。对照组44例中，出现牙龈红肿4例、牙龈出血4例、过敏4例、牙龈灰线3例及黏膜疼痛6例；观察组43例中仅出现1例牙龈红肿，观察组口腔修复情况优于对照组(P <0.05)。对照组44例中，出现牙齿支架损害10例、牙齿支架松动20例；观察组43例中，出现出现牙齿支架损害1例、牙齿支架松动1例，观察组修复体情况优于对照组(P<0.05)。表明钛锆铌锡合金修复牙体缺损具有良好的生物相容性及安全性。
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