Outcomes of Low Versus High Density All Pedicle Screw Technique in Adolescent Idiopathic Scoliosis a Prospective Study | ||
| Al-Azhar University Journal of Medical and Virus Researches and Studies | ||
| Volume 7, Issue 1, December 2025, Pages 27-41 PDF (454.99 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/aujv.2025.449924 | ||
| Abstract | ||
| Recent studies have shown that pedicle screw insertion in adolescent idiopathic scoliosis (AIS) has the risk for causing injury not only to the nervous system but also to the surrounding viscera, which include the aorta, azygos vein, and esophagus. However, many consider Thoracic pedicle screw (TPS) constructs the standard of care for deformity correction. Several previous studies have demonstrated the advantage of pedicle screws in absolute and percent of curve correction in scoliotic curves compared with hook and wire constructs. Bilateral placement of pedicle screws at every level has commonly been used, and the method provides maximal rigidity to the scoliosis construct; however, it is possible that fewer screws are adequate. This is a prospective study including twenty patients of adolescent idiopathic scoliosis at the age ranging from 12 to 18 years at the time of surgical intervention all of them were managed by posterior spinal fusion all pedicle screw technique divided in two groups one group by high density technique and one by low density technique. The implant density was defined as the number of screws per spinal level fused. Patients will be divided into two groups according to the average implant density for the entire study. The low density (LD) group (n = 10) will have less than 1.61 screws per level, while the high density (HD) group (n = 10) will have more than 1.61 screws per level. All operations have been done at Al Zahraa University Hospital and Misr children’s hospital for health insurance. This study shows that there was no statistically significant difference in radiographic measurements between high density and low density at final follow up (after 2 years). This study prospectively compared low density with high density pedicle screw instrumentation in terms of the clinical, radiological and SRS-22 outcomes in AIS. The two groups achieved satisfactory deformity correction. However, the operating time and blood loss were reduced, and implant costs were decreased with the use of low screw density constructs. All pedicle screw posterior achieves significant improvement in deformity correction and quality of life using high density or low-density screw pattern without significant loss of correction in follow up. | ||
| Keywords | ||
| Adolescent Idiopathic Scoliosis; Pedicle Screw; High density; Low density | ||
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