How Does Free Rod-Sliding Affect the Posterior Instrumentation for a Dynamic Stabilization Using a Bovine Calf Model?

Upper burst fracture of Th12-L1 has unique anatomy because it contains lower spinal cord, medullary cone, and diaphragm which separates between the thoracic and lumbar spine.The presence or absence of neurologic deficit is the single most important factor in the decision making. The presence of profound but incomplete neural deficit in association with canal compromise represents an urgent indication of surgical decompression. Antero-lateral direct decompression with trans-thoracic trans-pleural–retroperitoneal approach given the proximity the cord and conus is the most effective method, with inter-vertebral instrumentation with or without lateral fixation or posterior instrumentation.

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A Rare Case of Spinal Leprosy Mimicking Spinal Tuberculosis

International Journal of Human and Health Sciences (IJHHS) ◽

10.31344/ijhhs.v0i0.151 ◽

2019 ◽

pp. 33

Author(s):

K Thuraikumar ◽

V Naveen ◽

Mustaqim A ◽

Arieff AA ◽

K Shri ◽

...

Keyword(s):

Back Pain ◽

Soft Tissue ◽

Histopathological Examination ◽

Posterior Instrumentation ◽

Spinal Tuberculosis ◽

Previous History ◽

Skin Lesions ◽

Titanium Implants ◽

Paravertebral Abscess ◽

History Of

Introduction: Spinal tuberculosis is the most common manifestation of extrapulmonar y tuberculosis. A combination of leprosy and tuberculosis is a rare entity.Case report: A 44-year-old male patient working as a laborer presented to our hospital with complaints of severe back pain and swelling over the back, difficulty in walking, associated with constitutional symptoms. On admission, he was febrile and had leukocytosis. Initial spine X-ray showed end plate destruction and increase in soft tissue shadow at the level of T8-T9. CT spine revealed thoracic paravertebral collection extending from T7 to T9 levels, suggest ive of tuberculous spondylitis with cold abscess. Patient refused a transpedicular biopsy and was started on anti-tubercular therapy. Two weeks after commencement of treatment, he developed worsening back pain and weakness of the lower extremities. MRI spine showed a paravertebral abscess and posterior soft tissue edema involving level of T7 to T11. Patient underwent a posterior decompression, debridement and posterior instrumentation. He was discharged well, there was improvement of his lower limb power. Upon clinic review, he complained of multiple hyperpigmented, painless, nonpruritic skin lesions over the trunk and back. No previous history of eczema, psoriasis and Tinea corporis. Given the history of allergy, initial impression was hypersensitivity reaction towards the titanium implants, and he was started on anti-histamines. However, there was no improvements seen. Histopathological examination of skin lesions revealed presence of granuloma within the dermis layer, composed of epitheloid, histiocytes, lymphocytes and plasma cells. Wade-Fite stain for Mycobacterium leprae is positive. Slit skin smear shows multibacillary leprosy. Patient was started on multidrug therapy (rifampicin, clofazimine and dapsone) for 1 year. He has recovered well.International Journal of Human and Health Sciences Supplementary Issue: 2019 Page: 33

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Comparison of Changes in SRS-22 Values with Improvement in Cobb Angles after Posterior Fusion Surgery in Adolescent Idiopathic Scoliosis

Zeitschrift für Orthopädie und Unfallchirurgie ◽

10.1055/a-1401-0477 ◽

2021 ◽

Author(s):

Kadir Gem ◽

Sertan Hancioglu ◽

Abdulkadir Bilgiç ◽

Serkan Erkan

Keyword(s):

Adolescent Idiopathic Scoliosis ◽

Idiopathic Scoliosis ◽

Cobb Angle ◽

Posterior Instrumentation ◽

Research Society ◽

Posterior Fusion ◽

Improvement Rate ◽

Scoliosis Research Society ◽

Correction Rate ◽

Group B

Abstract Introduction The purpose of this study was to evaluate the relationship between the correction rate in Cobb angle and the improvement in quality of life profile in terms of Scoliosis Research Society (SRS)-22 values. Patients and Methods Between January 2007 and December 2013, posterior instrumentation and fusion was performed to 30 patients with adolescent idiopathic scoliosis (AIS). Patients were grouped according to their improvement rate in Cobb angles after surgery. Patients with an improvement rate of > 80% were grouped as Group A; those with an improvement rate of > 60% and ≤ 80% as Group B and those with an improvement rate of ≤ 60% were grouped as Group C. The SRS-22 questionnaire of these three groups was calculated and their relationship with the improvement in Cobb angle was evaluated. Results No statistical difference was found among the three groups in terms of pain, appearance, function, spirit, satisfaction, and SRS-22 values (all p > 0.05). Conclusion The results of this study demonstrate that the degree of correction rate does not correlate with the degree of improvement in the SRS-22 questionnaire in patients with AIS that underwent posterior fusion and instrumentation.

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Dynamic stabilization and heat transport characteristics of monolayer SnSe at finite temperature: A study by phonon quasiparticle approach

Physical Review B ◽

10.1103/physrevb.103.014304 ◽

2021 ◽

Vol 103 (1) ◽

Author(s):

Yong Lu ◽

Fa-wei Zheng ◽

Yu Yang ◽

Ping Zhang ◽

Dong-Bo Zhang

Keyword(s):

Heat Transport ◽

Finite Temperature ◽

Dynamic Stabilization

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Nonunion Rates After Anterior Cervical Discectomy and Fusion: Comparison of Polyetheretherketone vs Structural Allograft Implants

Neurosurgery ◽

10.1093/neuros/nyab079 ◽

2021 ◽

Author(s):

Won Hyung A Ryu ◽

Dominick Richards ◽

Mena G Kerolus ◽

Adewale A Bakare ◽

Ryan Khanna ◽

...

Keyword(s):

Smoking Status ◽

Posterior Instrumentation ◽

Patient Reported Outcome ◽

Anterior Cervical Discectomy ◽

Successful Outcome ◽

Cervical Discectomy ◽

Structural Allograft ◽

Modifiable Factors ◽

Patient Reported ◽

The Impact

Abstract BACKGROUND Although advances in implant materials, such as polyetheretherketone (PEEK), have been developed aimed to improve outcome after anterior cervical discectomy and fusion (ACDF), it is essential to confirm whether these changes translate into clinically important sustained benefits. OBJECTIVE To compare the radiographic and clinical outcomes of patients undergoing up to 3-level ACDF with PEEK vs structural allograft implants. METHODS In this cohort study, radiographic and symptomatic nonunion rates were compared in consecutive patients who underwent 1 to 3 level ACDF with allograft or PEEK implant. Prospectively collected clinical data and patient-reported outcome (PRO) scores were compared between the allograft and PEEK groups. Regression analysis was performed to determine the predictors of nonunion. RESULTS In total, 194 of 404 patients met the inclusion criteria (79% allograft vs 21% PEEK). Preoperative demographic variables were comparable between the 2 groups except for age. The rate of radiographic nonunion was higher with PEEK implants (39% vs 27%, P = .0035). However, a higher proportion of nonunion in the allograft cohort required posterior instrumentation (14% vs 3%, P = .039). Patients with multilevel procedures and PEEK implants had up to 5.8 times the risk of radiographic nonunion, whereas younger patients, active smokers, and multilevel procedures were at higher risk of symptomatic nonunion. CONCLUSION Along with implant material, factors such as younger age, active smoking status, and the number of operated levels were independent predictors of fusion failure. Given the impact of nonunion on PRO, perioperative optimization of modifiable factors and surgical planning are essential to ensure a successful outcome.

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