Mechanical Properties and Failure Mode of Proximal Screw Fixation Technique Using Locking Compression Plate for Proximal Interphalangeal Arthrodesis in Horses: An Ex Vivo Study.
Vet Comp Orthop Traumatol
; 2024 Jun 04.
Article
in En
| MEDLINE
| ID: mdl-38834168
ABSTRACT
OBJECTIVE:
The aim of this study was to measure the mechanical properties and failure mode of an ex vivo model of proximal interphalangeal arthrodesis in horses with different methods of proximal screw fixation using a locking compression plate. STUDYDESIGN:
Pastern joint arthrodesis with a 3-hole 4.5-mm narrow locking compression plate was performed on 20 forelimbs of equine cadavers, randomized into four groups based on the fixation method and type of proximal screw used unicortical cortex, bicortical cortex, unicortical locking, bicortical locking. Single-cycle axial compression testing was conducted until failure. The frequency of implant plastic deformation was recorded. Bone failure analysis was performed through computed tomography examinations and fractal analysis.RESULTS:
There were no differences in the analysed mechanical variables and fractal dimension among the groups. Transarticular screws showed a higher frequency of deformation (75%) regardless of the group. Both unicortical locking and bicortical locking groups deformed the plate more frequently.CONCLUSION:
The type of screw used in the proximal hole of the locking compression plate and its method of anchoring in the proximal phalanx do not affect the mechanical properties of pastern arthrodesis in equine cadavers subjected to single-cycle axial compression tests until failure.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Vet Comp Orthop Traumatol
Journal subject:
MEDICINA VETERINARIA
/
ORTOPEDIA
/
TRAUMATOLOGIA
Year:
2024
Document type:
Article
Affiliation country:
Brazil
Country of publication:
Germany