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. 2025 May 20;56(3):778–784. [Article in Chinese] doi: 10.12182/20250560603

表 2. Comparison of the precision of different impression methods.

不同取模方法的精确度比较

Group Implant positions CI (n = 21) IOS (n = 21) PIC (n = 21) ICam4D (n = 21) η2 P
 All abbreviations are explained in the first footnote to Table 1. The precision is evaluated by measuring the intra-group standard deviation (μm) of multiple measurements under the same experimental conditions. The smaller the value, the better the precision.* P < 0.05, vs. CI; P < 0.05, vs. IOS; # P < 0.05, vs. PIC.
A Left premolar 24.50 ± 12.52 31.84 ± 18.43 14.32 ± 8.13*, △ 3.80 ± 2.32*, △, # 0.45 < 0.05
Left lateral 40.54 ± 26.26 14.06 ± 7.97* 20.56 ± 12.36* 3.64 ± 1.48*, △, # 0.46 < 0.05
Right lateral 39.27 ± 25.18 16.29 ± 7.97* 20.81 ± 9.02*, △ 4.03 ± 1.71*, △, # 0.46 < 0.05
Right premolar 39.34 ± 29.41 28.82 ± 17.50 24.11 ± 12.36 4.74 ± 1.71*, △, # 0.33 < 0.05
Global 41.10 ± 14.47 24.82 ± 13.16* 21.54 ± 7.71* 4.40 ± 0.78*, △, # 0.62 < 0.05
B Left premolar 19.77 ± 11.18 37.53 ± 25.58* 12.54 ± 4.52 2.98 ± 2.88*, △, # 0.45 < 0.05
Left lateral 15.44 ± 6.69 15.87 ± 7.87 11.83 ± 5.87 1.53 ± 1.19*, △, # 0.50 < 0.05
Right lateral 18.81 ± 13.37 18.30 ± 7.21 28.10 ± 18.73 3.31 ± 1.87*, △, # 0.36 < 0.05
Right premolar 27.64 ± 18.11 43.92 ± 34.46 18.30 ± 11.73 3.55 ± 1.95*, △, # 0.35 < 0.05
Global 23.62 ± 7.55 35.44 ± 16.22* 20.21 ± 8.75 3.31 ± 1.45*, △, # 0.58 < 0.05
C Left premolar 27.85 ± 16.37 89.32 ± 70.99* 13.23 ± 4.93*, △ 4.26 ± 2.57*, △, # 0.47 < 0.05
Left lateral 28.66 ± 15.80 33.79 ± 13.08 14.09 ± 5.21*, △ 4.43 ± 2.11*, △, # 0.56 < 0.05
Right lateral 31.30 ± 14.92 32.90 ± 12.37 15.01 ± 6.91*, △ 1.76 ± 1.20*, △, # 0.62 < 0.05
Right premolar 32.51 ± 20.10 53.62 ± 39.80 18.97 ± 8.32*, △ 3.82 ± 1.99*, △, # 0.41 < 0.05
Global 32.63 ± 13.27 63.08 ± 32.34* 16.15 ± 3.80*, △ 4.06 ± 1.37*, △, # 0.63 < 0.05
D Left premolar 45.05 ± 33.35 50.66 ± 40.18 11.67 ± 5.05*, △ 3.64 ± 1.69*, △, # 0.39 < 0.05
Left lateral 29.81 ± 19.22 19.87 ± 8.37 13.50 ± 5.25*, △ 2.89 ± 2.14*, △, # 0.46 < 0.05
Right lateral 38.67 ± 21.96 33.52 ± 24.62 12.12 ± 3.74*, △ 3.01 ± 1.98*, △, # 0.45 < 0.05
Right premolar 28.64 ± 17.68 83.60 ± 55.54* 11.57 ± 3.53*, △ 3.82 ± 1.61*, △, # 0.55 < 0.05
Global 38.39 ± 20.12 60.25 ± 23.67* 12.79 ± 2.77*, △ 3.77 ± 1.13*, △, # 0.68 < 0.05
E Left premolar 21.78 ± 9.19 85.48 ± 75.19* 14.51 ± 5.67*, △ 4.05 ± 2.02*, △, # 0.42 < 0.05
Left lateral 20.89 ± 10.22 25.76 ± 13.57 12.73 ± 5.12*, △ 4.66 ± 1.65*, △, # 0.46 < 0.05
Right lateral 17.05 ± 6.39 41.46 ± 27.99* 18.80 ± 12.26 4.65 ± 2.20*, △, # 0.43 < 0.05
Right premolar 41.75 ± 28.38 66.63 ± 43.32 16.40 ± 8.73*, △ 4.13 ± 2.84*, △, # 0.47 < 0.05
Global 29.80 ± 11.11 70.34 ± 27.76* 16.53 ± 6.17*, △ 4.82 ± 0.95*, △, # 0.73 < 0.05
F Left premolar 44.29 ± 32.60 84.81 ± 64.33 13.37 ± 7.83*, △ 5.11 ± 2.71*, △, # 0.44 < 0.05
Left lateral 27.72 ± 14.96 35.46 ± 17.13 14.64 ± 6.45*, △ 1.87 ± 1.54*, △, # 0.55 < 0.05
Right lateral 37.17 ± 21.38 34.86 ± 15.32 14.20 ± 6.83*, △ 4.61 ± 2.29*, △, # 0.52 < 0.05
Right premolar 28.32 ± 11.14 99.43 ± 74.39* 9.82 ± 4.24*, △ 4.47 ± 3.44*, △, # 0.52 < 0.05
Global 39.20 ± 12.34 80.31 ± 34.54* 13.78 ± 3.36*, △ 4.68 ± 1.60*, △, # 0.73 < 0.05