Ti-24Nb-4Zr-8Sn Alloy Pedicle Screw Improves Internal Vertebral Fixation by Reducing Stress-Shielding Effects in a Porcine Model

Table 1

The strain resistance of Ti-24Nb-4Zr-8Sn and Ti-6A1-4V fixation groups under forward flexion loading before fixation (με, ×10⁻⁶).

Measuring points	Sample 1	Sample 2	Sample 3	Sample 4	Sample 5	Sample 6	Mean ± SD
1
EG	130	131	133	127	124	129	129 ± 3
RG	138	145	133	140	137	143	139 ± 4
2
EG	126	125	129	130	134	127	129 ± 3
RG	127	134	139	136	129	135	133 ± 5
3
EG	155	148	159	161	155	150	155 ± 5
RG	157	153	156	161	159	164	158 ± 4
4
EG	165	156	160	163	152	157	159 ± 5
RG	165	159	163	157	160	159	161 ± 3
5
EG	128	123	127	131	130	129	128 ± 3
RG	126	135	133	130	128	129	130 ± 3
6
EG	125	127	129	132	128	123	127 ± 3
RG	129	126	134	133	125	127	129 ± 4
7
EG	161	168	164	158	167	159	163 ± 4
RG	159	164	162	159	169	168	164 ± 4
8
EG	172	169	159	177	175	171	171 ± 6
RG	170	165	170	157	165	172	167 ± 5
9
EG	188	195	193	189	191	192	191 ± 3
RG	184	188	197	189	196	190	191 ± 5
10
EG	191	186	187	192	196	191	191 ± 4
RG	187	190	186	195	188	193	190 ± 4
11
EG	192	189	202	193	188	197	194 ± 5
RG	189	191	200	195	192	201	195 ± 5
12
EG	200	197	195	199	192	189	195 ± 4
RG	196	188	190	200	196	196	194 ± 4
13
EG	188	194	192	197	201	196	195 ± 4
RG	192	198	188	192	205	200	196 ± 6
14
EG	194	199	189	193	194	187	193 ± 4
RG	189	195	192	183	187	195	190 ± 5