The Modified Iliac Screw: An Anatomic Comparison and Technical Guide.
Iliac screws
Lumbar pelvic fixation
Modified iliac screw
Screw prominence
Soft tissue coverage
Journal
World neurosurgery
ISSN: 1878-8769
Titre abrégé: World Neurosurg
Pays: United States
ID NLM: 101528275
Informations de publication
Date de publication:
Apr 2020
Apr 2020
Historique:
received:
17
09
2019
revised:
11
01
2020
accepted:
13
01
2020
pubmed:
26
1
2020
medline:
9
4
2020
entrez:
26
1
2020
Statut:
ppublish
Résumé
Iliac screws are a widely used sacropelvic fixation technique, which is often criticized for its impaired wound healing owing to hardware prominence. The aim of this study was to present a modified iliac screw (MIS) fixation technique that uses a different entry point more medially and caudally to the posterior superior iliac spine next to the rudimentary S1-S2 joint. Soft tissue coverage and midline distance in an MIS and a traditional iliac screw were compared. Two different variations of iliac screws were placed into 12 fresh frozen adult cadavers (9 male, 3 female, mean age at death 77.08 years, mean body mass index 23.4). The distance between the midline and the center of the screw head was measured. We also compared the angulation of the trajectories. After wound closure, we measured the distance between the iliac screw head and the skin. The mean distance from the screw tulip head to the skin was 2.43 cm (range, 1.2-4.2 cm) with the traditional iliac screw and 3.16 cm (range, 1.7-4.3 cm) with the MIS. The mean distance to the midline with the MIS was 3.1 cm (range, 2.4-4.5 cm) lateral to the midline compared with the traditional iliac screw, of which the mean was 4.2 cm lateral to the midline (range, 3.7-4.9 cm). Mean angulation was 10°. The MIS avoids the use of connectors and provides less prominent pelvic fixation. Clinically, this might help prevent prominent hardware and related wound healing impairment.
Sections du résumé
BACKGROUND
BACKGROUND
Iliac screws are a widely used sacropelvic fixation technique, which is often criticized for its impaired wound healing owing to hardware prominence. The aim of this study was to present a modified iliac screw (MIS) fixation technique that uses a different entry point more medially and caudally to the posterior superior iliac spine next to the rudimentary S1-S2 joint. Soft tissue coverage and midline distance in an MIS and a traditional iliac screw were compared.
METHODS
METHODS
Two different variations of iliac screws were placed into 12 fresh frozen adult cadavers (9 male, 3 female, mean age at death 77.08 years, mean body mass index 23.4). The distance between the midline and the center of the screw head was measured. We also compared the angulation of the trajectories. After wound closure, we measured the distance between the iliac screw head and the skin.
RESULTS
RESULTS
The mean distance from the screw tulip head to the skin was 2.43 cm (range, 1.2-4.2 cm) with the traditional iliac screw and 3.16 cm (range, 1.7-4.3 cm) with the MIS. The mean distance to the midline with the MIS was 3.1 cm (range, 2.4-4.5 cm) lateral to the midline compared with the traditional iliac screw, of which the mean was 4.2 cm lateral to the midline (range, 3.7-4.9 cm). Mean angulation was 10°.
CONCLUSIONS
CONCLUSIONS
The MIS avoids the use of connectors and provides less prominent pelvic fixation. Clinically, this might help prevent prominent hardware and related wound healing impairment.
Identifiants
pubmed: 31981785
pii: S1878-8750(20)30109-1
doi: 10.1016/j.wneu.2020.01.091
pii:
doi:
Types de publication
Comparative Study
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e608-e613Informations de copyright
Copyright © 2020 Elsevier Inc. All rights reserved.