3D打印种植导板对单颗牙缺失病人的精准度及美学效果的影响

目的：研究3D打印种植导板对单颗牙缺失病人的精准度及美学效果的影响。方法：选择60例单颗牙缺损病人作为研究对象，用随机数表法将其分为观察组和对照组，各30例。对照组使用传统种植导板，观察组使用3D打印种植导板。计算2组2D平面上种植体顶部和中部在近远中向、颊舌向和垂直向的偏离距离；计算2组3D平面上种植体在近远中向、颊舌向的偏离角度；观察2组牙体颜色、形态、边缘着色和密合度的评级；观察并记录2组种植牙后2周内的不良事件发生情况。结果：观察组种植体顶部和中部在近远中向、颊舌向、垂直向的偏离距离明显比对照组小(P<0.01);观察组在近远中向、颊舌向的偏离角度均明显比对照组小(P<0.01);观察组种植牙的颜色、形态、边缘着色和密合度方面级别A的病人比对照组多(P<0.05);观察组不良事件总发生率比对照组低(P<0.05)。结论：与传统种植导板相比，使用3D打印种植导板能够缩小种植牙的偏离距离和角度，并在种植牙的颜色、形态和边缘着色方面有更高的评价，具有推广价值。

Effect of 3D printing implant guide on accuracy and aesthetic effect of patients with single tooth loss

ObjectiveTo study the effect of 3D printing implant guide on the accuracy and aesthetic effect of patients with single tooth loss.MethodsSixty patients with single tooth defect were selected, and were randomly divided into observation group and control group(30 cases in each group).The patients in the control group were treated with traditional implant guide, and the patients in the observation group were treated with 3D printing implant guide.The deviation distances of implant top and middle in mesial, distal, buccolingual and vertical directions were calculated in 2D plane, and the deviation angles of mesial, distal and buccolingual directions were calculated in 3D plane.The tooth color, shape, edge coloring and the degree of fit in the two groups were observed.The incidence of the adverse events within 2 weeks after dental implantation was observed and recorded.ResultsCompared with the control group, in the observation group, the deviation distances of the top and middle of the implant in the mesial and distal, buccolingual and vertical directions were smaller(P < 0.01);the deviation angles in the mesial, distal and buccolingual directions were smaller(P < 0.01);compared with the control group, in the observation group, there had more patients with grade A in the color, shape, edge coloring and tightness of implant teeth(P < 0.05), and the total incidence of adverse events was lower(P < 0.05).ConclusionsCompared with the traditional implant guide, the 3D printing implant guide can reduce the deviation distance and angle of the implant teeth, and has higher evaluation in the color, shape and edge coloring of the implant teeth.