Abstract
Objective: To compare the biomechanical properties of simulated humeral condylar fractures reduced with one of two screw fixation methods: 3.0 mm headless compression screw (HCS) or 3.5 mm cortical bone screw (CBS) placed in lag fashion. Methods: Bilateral humeri were collected from nine canine cadavers. Standardized osteotomies were stabilized with 3.0 mm HCS in one limb and 3.5 mm CBS in the contralateral limb. Condylar fragments were loaded to walk, trot, and failure loads while measuring construct properties and condylar fragment motion. Results: The 3.5 mm CBS-stabilized constructs were 36% stiffer than 3.0 mm HCS-stabilized constructs, but differences were not apparent in quality of fracture reduction nor in yield loads, which exceeded expected physiological loads during rehabilitation. Small residual fragment displacements were not different between CBS and HCS screws. Small fragment rotation was not significantly different between screws, but was weakly correlated with moment arm length (R2 = 0.25). Clinical significance: A CBS screw placed in lag fashion provides stiffer fixation than an HCS screw, although both screws provide similar anatomical reduction and yield strength to condylar fracture fixation in adult canine humeri.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 353-360 |
| Number of pages | 8 |
| Journal | Veterinary and Comparative Orthopaedics and Traumatology |
| Volume | 29 |
| Issue number | 5 |
| DOIs | |
| State | Published - 2016 |
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Keywords
- Canine
- Headless compression
- Humeral condylar fracture
- Lag screw
ASJC Scopus subject areas
- Animal Science and Zoology
- veterinary(all)
Cite this
Biomechanical comparison of 3.0 mm headless compression screw and 3.5 mm cortical bone screw in a canine humeral condylar fracture model. / Gonsalves, Mishka N.; Jankovits, Daniel A.; Huber, Michael L.; Strom, Adam M.; Garcia, Tanya C.; Stover, Susan M.
In: Veterinary and Comparative Orthopaedics and Traumatology, Vol. 29, No. 5, 2016, p. 353-360.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Biomechanical comparison of 3.0 mm headless compression screw and 3.5 mm cortical bone screw in a canine humeral condylar fracture model
AU - Gonsalves, Mishka N.
AU - Jankovits, Daniel A.
AU - Huber, Michael L.
AU - Strom, Adam M.
AU - Garcia, Tanya C.
AU - Stover, Susan M
PY - 2016
Y1 - 2016
N2 - Objective: To compare the biomechanical properties of simulated humeral condylar fractures reduced with one of two screw fixation methods: 3.0 mm headless compression screw (HCS) or 3.5 mm cortical bone screw (CBS) placed in lag fashion. Methods: Bilateral humeri were collected from nine canine cadavers. Standardized osteotomies were stabilized with 3.0 mm HCS in one limb and 3.5 mm CBS in the contralateral limb. Condylar fragments were loaded to walk, trot, and failure loads while measuring construct properties and condylar fragment motion. Results: The 3.5 mm CBS-stabilized constructs were 36% stiffer than 3.0 mm HCS-stabilized constructs, but differences were not apparent in quality of fracture reduction nor in yield loads, which exceeded expected physiological loads during rehabilitation. Small residual fragment displacements were not different between CBS and HCS screws. Small fragment rotation was not significantly different between screws, but was weakly correlated with moment arm length (R2 = 0.25). Clinical significance: A CBS screw placed in lag fashion provides stiffer fixation than an HCS screw, although both screws provide similar anatomical reduction and yield strength to condylar fracture fixation in adult canine humeri.
AB - Objective: To compare the biomechanical properties of simulated humeral condylar fractures reduced with one of two screw fixation methods: 3.0 mm headless compression screw (HCS) or 3.5 mm cortical bone screw (CBS) placed in lag fashion. Methods: Bilateral humeri were collected from nine canine cadavers. Standardized osteotomies were stabilized with 3.0 mm HCS in one limb and 3.5 mm CBS in the contralateral limb. Condylar fragments were loaded to walk, trot, and failure loads while measuring construct properties and condylar fragment motion. Results: The 3.5 mm CBS-stabilized constructs were 36% stiffer than 3.0 mm HCS-stabilized constructs, but differences were not apparent in quality of fracture reduction nor in yield loads, which exceeded expected physiological loads during rehabilitation. Small residual fragment displacements were not different between CBS and HCS screws. Small fragment rotation was not significantly different between screws, but was weakly correlated with moment arm length (R2 = 0.25). Clinical significance: A CBS screw placed in lag fashion provides stiffer fixation than an HCS screw, although both screws provide similar anatomical reduction and yield strength to condylar fracture fixation in adult canine humeri.
KW - Canine
KW - Headless compression
KW - Humeral condylar fracture
KW - Lag screw
UR - http://www.scopus.com/inward/record.url?scp=84988517661&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84988517661&partnerID=8YFLogxK
U2 - 10.3415/VCOT-15-06-0097
DO - 10.3415/VCOT-15-06-0097
M3 - Article
C2 - 27439451
AN - SCOPUS:84988517661
VL - 29
SP - 353
EP - 360
JO - Veterinary and Comparative Orthopaedics and Traumatology
JF - Veterinary and Comparative Orthopaedics and Traumatology
SN - 0932-0814
IS - 5
ER -