Medial meniscus posterior root tears (MMRTs) disrupt hoop stress transmission and biomechanically resemble total meniscectomy, accelerating medial compartm

Background/Objective: The anterior vertebral body tethering (AVBT) technique, which preserves spinal mobility and avoids possible fusion problems in adolescent idiopathic scoliosis (AIS) patients, continues to be increasingly used in spine surgery. The study aims to report the early-to-early-mid postoperative radiological results of thoracolumbar/lumbar AVBT on sagittal alignment, and the second aim is to compare AVBT with selective thoracic fusion (STF) and non-selective fusion (NSF) groups in AIS patients. Methods: Patients with a diagnosis of AIS were retrospectively evaluated in the study. All patients were categorized into three groups based on the surgical technique performed: AVBT (n = 17), NSF (n = 19), and STF (n = 15). The major curvature degree, coracoid height difference (CHD), sacral slope (SS), pelvic tilt (PT), pelvic incidence (PI), lumbar lordosis (LL), thoracic kyphosis (TK), cervical lordosis (CL), C7 tilt, sagittal vertical axis (SVA), T1 pelvic angle (TPA), and T1 spinopelvic inclination (T1SPI) were measured for radiological comparison. Scoliosis Research Society-22 (SRS-22) and Oswestry Disability Index (ODI) scores were used at the final follow-up for functional evaluation. Results: The T1SPI value of the NSF group was significantly higher than the STF group in the final follow-up (p = 0.033). The mean decrease of 8.85 ± 7.85 units in the final follow-up value compared to the postoperative CHD value of the patients in the AVBT group was found to be significant (p = 0.028). Statistically significant differences were found between preoperative and the first postoperative CL and TPA measurements (p = 0.001 and p = 0.042, respectively), as well as between preoperative and final follow-up CL measurements in the AVBT group (p = 0.001). No statistically significant differences were observed between the groups in CHD, SS, PT, PI, LL, TK, CL, C7 tilt, SVA, and TPA values (p > 0.05); similarly, the SRS-22 and ODI scores did not differ significantly among the groups (p > 0.05). Conclusions: Thoracolumbar/lumbar AVBT surgery led to significant improvements in shoulder asymmetry and cervical lordosis of AIS patients in the early to early-mid postoperative period. However, compared with spinal fusion techniques, thoracolumbar/lumbar AVBT did not demonstrate superiority in functional scores or sagittal parameters. The mid- to long-term benefits of thoracolumbar/lumbar AVBT remain uncertain and require further investigation.

Objective: This study aimed to investigate the impact of different compression magnitudes and durations on peripheral nerve conduction and the time required for recovery in a porcine model. Methods: Six adult male farm pigs (Sus scrofa) were allocated to 3 experimental groups. Transcutaneous motor-evoked potential (TcMEP) responses were recorded using surface electrodes. To assess the impact of compression on nerve conduction, compression was applied to the sciatic nerve to reduce the TcMEP by 50%, 70%, and 90% in the first, second, and third groups, respectively. Each compression was applied for durations of 1, 5, and 8 minutes, with TcMEP measurements taken at 5 seconds, 1 minute, 5 minutes, 10 minutes, 30 minutes, and 60 minutes post-compression. Results: In the first group, after 1 minute of compression, the average recovery time for TcMEP values to return to baseline was 118 Å} 25 seconds (range, 60-130 seconds). Following 5 minutes of compression, recovery occurred after an average of 28 Å} 8 minutes (range, 20-38 minutes). However, after 8 minutes of compression, TcMEP values did not return to baseline. In the second group, the recovery time after 1 minute of compression was significantly longer compared to the group with 50% TcMEP reduction (P < .001). After 5 minutes of compression, TcMEP values failed to return to baseline. In the third group, where TcMEP reduction exceeded 90%, no recovery to baseline was observed regardless of compression duration, suggesting irreversible nerve damage. Conclusion: The findings suggest that prolonged compression times result in more significant reductions in TcMEP values, indicating irreversible nerve conduction damage. Further studies are warranted to investigate the clinical implications of these findings, particularly regarding the thresholds for permanent nerve damage. Cite this article as: Karalar Ş, Bayram S, Yağci TF, Akgül T. Electrodiagnostic evaluation of the effect of compression time and intensity on the conduction and recovery time of nerves in the peripheral nervous system. Acta Orthop Traumatol Turc.2026; 60(3), 0068, doi: 10.5152/j.aott.2026.24068.