在口腔修复过程中,为了获得外形美观、边缘密合性优良的修复体,尤其是牙预备体边缘在龈缘以下的病例,保证制备体印模有高精度是首要条件。近年来,印模材料的性能不断改进,使得精度不断提高,但操作过程中的各种因素对印模的精确度有一定的影响。故明确影响印模精度的常见因素,通 In the process of oral repair, in order to obtain aesthetically pleasing, excellent adhesion of the edge of the prosthesis, especially in the edge of the margin of the tooth preparation in the gingival margin of the case, to ensure that the preparation of high-precision impression is the primary condition. In recent years, the continuous improvement of the performance of impression materials, making the accuracy continues to improve, but the operation of various factors on the accuracy of the impression has a certain impact. Therefore, a clear impact on the accuracy of the common factors, pass