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

Table 2

The strain resistance of Ti-24Nb-4Zr-8Sn and Ti-6A1-4V fixation groups under backward 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	−200	−189	−201	−205	−192	−197	−197 ± 6
RG	−203	−187	−197	−199	−201	−197	−197 ± 6
2
EG	−205	−196	−198	−192	−193	−201	−198 ± 5
RG	−204	−196	−193	−201	−195	−203	−199 ± 5
3
EG	−167	−174	−168	−172	−173	−169	−171 ± 3
RG	−177	−176	−168	−175	−172	−169	−173 ± 4
4
EG	−178	−169	−177	−169	−174	−170	−173 ± 4
RG	−173	−169	−175	−174	−178	−165	−172 ± 5
5
EG	−198	−202	−199	−195	−201	−197	−199 ± 3
RG	−197	−194	−192	−196	−202	−200	−197 ± 4
6
EG	−207	−209	−196	−203	−208	−195	−203 ± 6
RG	−204	−202	−197	−193	−196	−199	−199 ± 4
7
EG	−150	−162	−155	−157	−159	−161	−157 ± 4
RG	−155	−161	−157	−154	−159	−163	−158 ± 3
8
EG	−167	−178	−168	−172	−170	−169	−171 ± 4
RG	−173	−175	−166	−161	−167	−169	−169 ± 5
9
EG	−128	−136	−130	−132	−129	−135	−132 ± 3
RG	−124	−133	−131	−127	−130	−128	−129 ± 3
10
EG	−134	−137	−133	−137	−135	−130	−134 ± 3
RG	−132	−130	−137	−135	−129	−131	−132 ± 3
11
EG	−219	−216	−233	−229	−230	−227	−226 ± 7
RG	−214	−213	−225	−231	−219	−232	−222 ± 8
12
EG	−231	−227	−218	−231	−237	−226	−228 ± 6
RG	−228	−231	−221	−242	−234	−220	−229 ± 8
13
EG	−217	−241	−229	−236	−224	−238	−231 ± 9
RG	−220	−233	−231	−232	−231	−229	−229 ± 5
14
EG	−224	−223	−236	−240	−229	−237	−232 ± 7
RG	−233	−220	−231	−236	−238	−241	−233 ± 7