三种扫描流程制作氧化锆修复体的临床效果比较研究

目的 比较三种不同的模型数据获取方式所制作氧化锆修复体的临床效果，研究它们的特点。方法 选取201例患者，282单位。随机分成三种扫描流程制作：(1)TRIOS口扫仪扫描石膏模型，制作全瓷冠桥149单位(模型扫描组);(2)分割模型后仓扫，制作全瓷冠桥62单位(分割仓扫组);(3)TRIOS口扫仪直接口内扫描制作全瓷冠桥71单位(直接口扫组)。记录三组流程患者的模型获取时间，根据改良USPHS评价标准评估临床修复效果。结果 模型扫描、分割仓扫、直接口扫组的模型处理操作时间分别为(71.779±4.536)、(133.500±6.174)和(71.253±3.668)min,三组用时差异有统计学意义(F=4.499,P=0.000),模型扫描组、直接口扫组操作快于分割仓扫组；三组修复体的颜色、表面质地和外形的临床效果差异无统计学意义；直接口扫、模型扫描组的边缘适合性高于分割仓扫组，差异有统计学意义(χ²=7.893,P=0.019)。结论 口扫模型和直接口内扫描方式简化制作流程，缩短模型处理时间，节约人力和物力成本，同时较传统分割仓扫有更高的取模精度，能获得优良的修...

Comparative study on clinical effects of three scanning processes for zirconia restoration

Objective To compare the clinical effects of zirconia restorations manufactured through 3 model data acquisition Methods and to study their characteristics. Methods Two hundred and one patients with 282 units were selected. Three scanning processes were randomly selected for production: ① plaster models were scanned by TRIOS scanning instrument and 149 units of all-porcelain crown and bridge were made (model scanning group); ② after segmenting the model, 62 units of all-porcelain crown bridge were made (divided bin scanning group); ③ 71 units of all-porcelain crown bridge (direct oral scanning group) were made by TRIOS oral scanning instrument. The model acquisition time of patients in the three groups was recorded, and the clinical efficacy was evaluated according to the modified USPHS evaluation criteria. Results The operation time of model scanning group, split bin scanning group and direct oral scanning group were (71.779±4.536), (133.500±6.174), (71.253±3.668) min, respectively. The time difference among the three groups was statistically significant (F=4.499, P=0.000). The operation of model scanning group and direct oral scanning group was faster than that of split bin scanning group. There were no statistically significant differences in the clinical effects on color, surface texture and shape among the three groups. The edge fitness of direct oral scanning and model scanning was higher than that of split warehouse scanning, and the difference was statistically significant (χ²=7.893, P=0.019). Conclusion The oral scanning model and the oral direct scanning method can simplify the manufacturing process, shorten the model processing time, save labor and material costs, and have a higher mold accuracy than the traditional segmented bin scanning method, which can obtain excellent fitness of restoration edge.