金属面与应力中断设计在龈距不足游离端牙齿缺失修复中的应用

1 资料和方法

1.1 病例资料

患者，女性，51 岁，陕西西安人，因双侧下颌后牙缺失3 年，来我院要求修复治疗。患者无吸烟、酗酒史。全身健康状况良好，否认有高血压、心脏病等系统性疾病，否认有乙肝、艾滋病等传染性疾病，无药物过敏史。患者自述“5 年前两侧下后牙因严重龋坏于外院拔除，曾于外院行活动义齿修复2 次，均半年内折断。最近一次活动义齿损坏至今1 年时间内，未对缺失牙进行修复。以往修复过程中曾因缺牙区对颌牙伸长，对右侧上后牙进行调磨，右侧上后牙进食过冷过热食物有不适感”。临床检查：37 牙缺失，邻缺隙牙无倾斜、无扭转，对

2.金融转换效率指标。一个地区储蓄转换为贷款的比率越高，反映该地区金融机构在提供金融服务、日常经营以及金融体系中资金配置的效率越高。本研究用县域金融机构贷款总额占存款总额的比值（SLR）表示广西县域金融转换效率指标。

1.2 治疗计划

治疗计划：可摘局部义齿修复缺失牙。

甲基莲心碱与荷叶碱作用HepG2细胞对其上清液中LDH、TGF-β1、VEGF 的比较…………………………………… 李 娜，宋金春（2·89）

1.3 治疗过程

1.3.1 初模型分析与支架设计 取初模型，利用导线观测仪进行分析，进行义齿初步设计，完成义齿设计图（图3）。

1.3.2 基牙预备与精细印模 依据义齿就位道方向制备备牙导板，并利用备牙导板进行基牙预备，消除基牙过大倒凹，制备导平面及支托窝。并用个别托盘与流动性更好的聚醚橡胶，两步法制取精细印模（图4）。

1.3.4 功能性印模 1 周后复诊，支架调改，口内试戴合适后，用光敏树脂在支架上制作缺牙区局部个别托盘，并进行边缘整塑，利用聚醚橡胶制取功能性印模后，进行模型切割、围模灌注及模型修整。重新上架后，送交技工室（图6）。

1.3.5 义齿完成与试戴 义齿初戴时，首先对义齿组织面、基托边缘进行调磨。义齿完全就位后，用咬合纸辅助进行咬合调改。T-scan 检测调改后患者口内咬合状态（图7）。

2 结 果

3 讨 论

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】 Luo JT, Wang YM collected, analyzed the data and revised the article. Sun GY, Qin T analyzed the data and re-vised the article. Wu GF designed the study and revised the article. Ba RK designed the study and wrote the article. All authors read and ap-proved the final manuscript as submitted.

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