Individual Lordotic Cages Implantation and Radiographic Evaluation of Segmental and Lumbar Lordosis Correction for Patients with Adult Degenerative Scoliosis

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Abstract

Relevance. The development of minimally invasive surgery has led to the development of new methods for surgical treatment of the spine. Conventional surgical technique, such as vertebrotomy is accompanied by a several number of disadvantages (high blood loss, prolonged hospital stay, long intraoperative time, postoperative neurological deficit). An alternative to improve sagittal balance in the spine is to use custom-made hyperlordotic cages, which can also be used for indirect decompression of neural structures.

The objective is to compare the degree of segmental and total lumbar lordosis using hyperlordotic cages through ALIF and TLIF with posterior instrumentation.

Materials and Methods. A single-center retrospective cohort study using 96 patients treated from 2018 to 2019 about degenerative spinal deformities. Comparison of two groups: group 1 (A) consisted of 30 patients who were held anterior spinal fusion with individual lordotic cages from minimally invasive anterior approach (MISS ALIF) without posterior fixation. Group 2 (B) consisted of 33 patients whom were performed spinal fusion from the posterior approach (TLIF) with Smith-Peterson Osteotomy (SPO) and transpedicular fixation. Measuring segmental and lumbar lordosis, teleradiographs were used in a standing position. For an accurate assessment, the non-commercial available Surgimap software, © Nemaris, was used.

Results. Segmental lordosis were superior to preoperative ones. In the intergroup comparison, the ALIF group showed an excellent increase in the enlarged lordosis segment (L3-L4 in 8 degrees; p = 0.0005, L4-L5 in 7 degrees; p = 0.0002, L5-S1 in 7 degrees; p = 0.0001). When conducting an intergroup comparison of total lumbar lordosis in the preoperative period, there was a statistically significant difference between them (p = 0.0043). At the same time, a greater degree of correction of lordosis is shown in ALIF compared to TLIF group (29,1 in comparison with 22,5; p = 0.00005).

Conclusion. The results of this study confirm that the using of custom-made lordotic cages can significantly increase segmental and total lumbar lordosis for patients with degenerative scoliosis in adults.

About the authors

A. A. Denisov

Vreden National Medical Research Center of Traumatology and Orthopedics

Author for correspondence.
Email: denisov1993@gmail.com

Anton A. Denisov — PhD Student

St. Petersburg

Russian Federation

D. A. Ptashnikov

Vreden National Medical Research Center of Traumatology and Orthopedics;
Mechnikov North-Western State Medical University

Email: fake@neicon.ru

Dmitry A. Ptashnikov — Dr. Sci. (Med.), Professor, the Head of Scientific Department of Neuroorthopedics and Bone Tumors; the Head of Traumatology and Orthopedics Department

St. Petersburg

Russian Federation

D. A. Mikhaylov

Vreden National Medical Research Center of Traumatology and Orthopedics

Email: fake@neicon.ru

Dmitry A. Mikhaylov — Cand. Sci. (Med.), Orthopedic Surgeon

St. Petersburg

Russian Federation

S. V. Masevnin

Vreden National Medical Research Center of Traumatology and Orthopedics

Email: fake@neicon.ru

Sergey V. Masevnin — Cand. Sci. (Med.), Orthopedic Surgeon

St. Petersburg

Russian Federation

O. A. Smekalenkov

Vreden National Medical Research Center of Traumatology and Orthopedics

Email: fake@neicon.ru

Oleg A. Smekalenkov — Cand. Sci. (Med.), Orthopedic Surgeon

St. Petersburg

Russian Federation

N. S. Zaborovskii

Vreden National Medical Research Center of Traumatology and Orthopedics

Email: fake@neicon.ru

Nikita S. Zaborovski — Cand. Sci. (Med.), Orthopedic Surgeon

St. Petersburg

Russian Federation

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  1. Yarikov AV, Gorbatov RO, Shpagin MV, Stolyarov II, Denisov AA, Kabardaev RM, et al. The application of three-dimensional prototyping and printing in reconstructive neurosurgery and vertebrology (literature review and own results). Vestnik nevrologii, psihiatrii i nejrohirurgii (Bulletin of Neurology, Psychiatry and Neurosurgery). 2021;(7):534. doi: 10.33920/med-01-2107-05

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