Table 2. Comparison between pre and postoperative chord mu and alpha distance
Parameter (mm) Parameter (mm) Centration Point Centration Point Centration Point
Mean ± SD [95%CI] Mean ± SD [95%CI]
p value [Mean Dif 95% CI]
PC FPR
alpha distance
Preop Postop Mean Dif. ± SD p value 0.428±0.084 [0.396; 0.460] 0.355±0.057 [0.333;0.377] 0.073±0.055 [0.052;0.094] <0.001* 0.426±0.080 [0.395; 0.456] 0.358±0.053 [0.338;0.378] 0.067±0.050 [0.049;0.086] <0.001* 0.424 [-0.007; 0.003] 0.067 [0.000; 0.007] 0.111 [-0.012; 0.001]
chord mu
Preop Postop Mean Dif. ± SD p value 0.250±0.073 [0.222; 0.277] 0.158±0.032 [0.146;0.171] 0.091±0.083 [0.060;0.123] <0.001* 0.243±0.070 [0.216; 0.269] 0.165±0.039 [0.150;0.180] 0.077±0.070 [0.051; 0.104] <0.001* 0.339 [-0.022; 0.007] 0.182 [-0.004;0.017] 0.022* [-0.026; -0.002]