Experimental assessment of changes in bone fragment position using infraread diodes on saw bone models with a hexapod fixator.
Bone fragment position
Experimental
Hexapod fixator
Tibial non-union
Journal
Orthopaedics & traumatology, surgery & research : OTSR
ISSN: 1877-0568
Titre abrégé: Orthop Traumatol Surg Res
Pays: France
ID NLM: 101494830
Informations de publication
Date de publication:
09 2022
09 2022
Historique:
received:
02
03
2021
revised:
29
10
2021
accepted:
28
01
2022
pubmed:
15
3
2022
medline:
30
8
2022
entrez:
14
3
2022
Statut:
ppublish
Résumé
The purpose of this study was an experimental assessment of changes in bone fragment position in patients with non-union of the tibia treated with a hexapod fixator. We hypothesized that the use of hexapod fixators leads to differences between the planned and actual position of bone fragments. The study was conducted in physical models of the hexapod fixator-bone fragment system. Bone fragment displacement was measured using the Optotrak Certus Motion Capture System. We assessed differences between the planned and actual position of bone fragments. Assessment of bone fragment compression demonstrated a difference between the target and actual correction ranging from 1.5% to 13.2% (depending on the force applied to bone fragments) for configuration 1, from17% to 21.3% for configuration 2, and from 13.2% to 17.9% for configuration 3. The achieved varus deformity correction constituted 93.7-98.4% of the target correction for configuration 2 and 98.3-98.9% of the target correction for configuration 3. Torsional deformity correction showed considerable discrepancies between the target and achieved correction, ranging from 65.6% to 83%. The value of the applied compression force had no marked effect on the differences between the target and achieved correction or on the magnitude of unintended rotational and transverse displacement of bone fragments. The use of hexapod fixators helped achieve complete correction of the simulated varus deformity; however, complete correction of torsional deformities was not achieved. Deformity correction in physical models with the use of a hexapod fixator yielded instances of unintended rotational and transverse bone-fragment displacement. The use of hexapod fixators in physical models leads to differences between the planned and actual position of bone fragments. IV, case series.
Sections du résumé
BACKGROUND
The purpose of this study was an experimental assessment of changes in bone fragment position in patients with non-union of the tibia treated with a hexapod fixator.
HYPOTHESIS
We hypothesized that the use of hexapod fixators leads to differences between the planned and actual position of bone fragments.
METHODS
The study was conducted in physical models of the hexapod fixator-bone fragment system. Bone fragment displacement was measured using the Optotrak Certus Motion Capture System. We assessed differences between the planned and actual position of bone fragments.
RESULTS
Assessment of bone fragment compression demonstrated a difference between the target and actual correction ranging from 1.5% to 13.2% (depending on the force applied to bone fragments) for configuration 1, from17% to 21.3% for configuration 2, and from 13.2% to 17.9% for configuration 3. The achieved varus deformity correction constituted 93.7-98.4% of the target correction for configuration 2 and 98.3-98.9% of the target correction for configuration 3. Torsional deformity correction showed considerable discrepancies between the target and achieved correction, ranging from 65.6% to 83%.
DISCUSSION
The value of the applied compression force had no marked effect on the differences between the target and achieved correction or on the magnitude of unintended rotational and transverse displacement of bone fragments. The use of hexapod fixators helped achieve complete correction of the simulated varus deformity; however, complete correction of torsional deformities was not achieved. Deformity correction in physical models with the use of a hexapod fixator yielded instances of unintended rotational and transverse bone-fragment displacement. The use of hexapod fixators in physical models leads to differences between the planned and actual position of bone fragments.
LEVEL OF EVIDENCE
IV, case series.
Identifiants
pubmed: 35283363
pii: S1877-0568(22)00080-9
doi: 10.1016/j.otsr.2022.103268
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
103268Informations de copyright
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