为了探索应用激光快速成形(LRF)技术制作纯钛基底冠的可行性,通过激光扫描测量模拟了基牙的铝合金代型并三维重建其数字化外形,采用计算机辅助设计了基底冠。通过正交实验优化基底冠加工参数,将基底冠数据与加工参数导入快速成形系统加工10个纯钛基底冠。将完成的纯钛基底冠在铝合金代型上就位粘接,进行边缘适合性检测,评估加工精度。得到激光快速成形技术可以进行纯钛基底冠的加工,边缘适合性检测结果表明10个基底冠的各点间隙大小与临床120 μm可接受的标准相比,均显著小于120 μm。

To evaluate the feasibility of the laser rapid forming (LRF) technology for fabricating titanium coping, laser scanner was used to measure aluminium alloy die of abutment tooth and reconstruct its three-dimensional digital profile. The shape of coping was designed by computer based on the digital abutment tooth models. The processing parameters were established by employing orthogonal experimental design. Ten titanium copings were fabricated with LRF based on the coping data and the processing parameters, adhesive test of the titanium coping on the aluminium alloy die was made, and the fabricating precision of the LRF was evaluated through marginal adaptation test. Results showed that LRF technology could be used to fabricate titanium coping. Marginal adaptation test showed that the experimental data of gaps between fabricated copings were less than 120 μm which was accepted by clinical.