## 3 Results
The distribution of the wall pressure comparing non-stent, T-stenting, Culotte, and Kissing techniques in the arteries A and B; (**a**) Type of artery A; (**b**) Type of artery B. For further understanding the area ratio of the TAWSS in the percentage of less than 0.5 Pa, the TAWSS area of the artery with less than 0.5 Pa divided by the whole TAWSS area of the artery was calculated. The critical TAWSS (<0.5 Pa) area ratio of the two arteries with the three stenting techniques in the three bifurcation angles is shown in Figure 8. The critical TAWSS area ratio in the artery A was larger than that of the artery B. Moreover, both the arteries A and B in the critical TAWSS area ratio were significantly detected to increase when the bifurcation angles of the artery were enlarged. The largest critical TAWSS area ratio of the artery A was obtained at the T-stenting technique. The ranks of the critical TAWSS area ratio in the models of large bifurcation angles were T-stenting (25.30%) > Culotte (20.93%) > Kissing (13.80%). The largest critical TAWSS area ratio of the artery B was detected at the Kissing technique. The ranks of the critical TAWSS area ratio were Kissing (12.02%) > Culotte (7.54%) > T-stenting (7.43%). The rank of the critical TAWSS area ratio in the arteries A and B models of medium bifurcation angles were Culotte (19.11%) > T-stenting (18.52%) > Kissing (11.96%), and Kissing (10.47%) > Culotte (7.42%) > T-stenting (7.04%), respectively. The ranks of the critical TAWSS area ratio in the arteries A and B models of small bifurcation angles were Culotte (18.60%) > T-stenting (16.59%) > Kissing (9.99%), and Kissing (9.35%) > Culotte (6.76%) > T-stenting (6.59%), respectively. Figure 8: Low TAWSS area ratio. Comparisons of the low TAWSS area ratio were performed in the T-stenting, Culotte, and Kissing techniques of the arteries A and B. (TAWSS: time-averaged wall shear stress). Figure 7: The distribution of the specific low TAWSS. The colored area is the TAWSS less than 0.5 Pa. The specific low TAWSS was detected a high risk of stenting restenosis when compared with the T-stenting, Culotte, and Kissing techniques in the arteries A and B. (TAWSS: time-averaged wall shear stress). The specific regions of the OSI value larger than 0.2 were considered a higher risk of stenting restenosis after placement of a two-stent operation. The figure presentation of the specific regions was further presented in the sections of result and discussion. The results of the specific OSI distribution are shown in Figure 9. The larger 0.2 in the OSI value of the artery A by the T-stenting was mainly concentrated on the LCX branch. The larger 0.2 in the OSI value of the artery B by the T-stenting was also concentrated on the LCX branch, particularly on the proximal site of the lateral LCX branch. In the models of the Culotte stenting, the larger 0.2 in the OSI value of the artery A was mainly focused on the proximal site of the LAD and LCX branches. In contrast, the larger 0.2 in the OSI value of the artery B was concentrated on the proximal site of the lateral LCX branch. In the models of the Kissing stenting, the larger 0.2 in the OSI of the artery A was mainly concentrated on the lateral LCX branch and bifurcation carina. Likewise, the larger 0.2 in the OSI value of the artery B was also focused on the lateral LCX branch and bifurcation carina. The larger 0.2 in the OSI values of the two arteries became more pronounced when the bifurcation angles were augmented. For evaluation of the arterial OSI, the arteries selected were three perpendicular sections to the proximal LMCA, LAD, and LCX near the bifurcation region to calculate the OSI variations. Each section was uniformly picked, with 50 points of the OSI on the arterial section edge. The section contour of the arteries was further divided into four regions--A, B, C, and D regions--to evaluate the differences of the OSI. The 12 o'clock position was selected from the OSI as the initial capture point, from number 1 to number 50, in a clockwise manner (Figure 10).