Abstract
Background: Triple-threaded, cannulated headless screws of varying thread diameters and pitch are designed to maintain thread length across the arthrodesis plane, provide joint compression, and reduce countersinking. This study tested the biomechanical fixation strength of conventional partially threaded lag screws compared to triple-threaded headless screws in first metatarsophalangeal joint arthrodesis. Methods: First metatarsophalangeal joint arthrodesis using a crossed screw technique was performed on 11 paired, preserved cadaver first rays with two 4.0-mm triple-threaded, cannulated headless screws or two 4.0-mm partially threaded, cannulated lag screws. The constructs were tested to failure through dorsally directed cantilever bending. Results: The triple-threaded, cannulated headless screws displayed significantly greater bending stiffness (p= 0.017) and failure load (p= 0.040) during load-to-failure testing compared to the partially threaded, cannulated lag screws. Conclusions: Triple-threaded, cannulated headless screws may be a viable alternative to partially threaded lag screws in first metatarsophalangeal arthrodesis.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 144-148 |
| Number of pages | 5 |
| Journal | Foot and Ankle Surgery |
| Volume | 20 |
| Issue number | 2 |
| DOIs | |
| State | Published - 2014 |
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Keywords
- Arthrodesis
- Fusion
- Hallux rigidus
- Hallux valgus
- Rheumatoid arthritis
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
Cite this
Biomechanical comparison of first metatarsophalangeal joint arthrodeses using triple-threaded headless screws versus partially threaded lag screws. / Lucas, Kurt J.; Morris, Randal P.; Buford, William L.; Panchbhavi, Vinod.
In: Foot and Ankle Surgery, Vol. 20, No. 2, 2014, p. 144-148.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Biomechanical comparison of first metatarsophalangeal joint arthrodeses using triple-threaded headless screws versus partially threaded lag screws
AU - Lucas, Kurt J.
AU - Morris, Randal P.
AU - Buford, William L.
AU - Panchbhavi, Vinod
PY - 2014
Y1 - 2014
N2 - Background: Triple-threaded, cannulated headless screws of varying thread diameters and pitch are designed to maintain thread length across the arthrodesis plane, provide joint compression, and reduce countersinking. This study tested the biomechanical fixation strength of conventional partially threaded lag screws compared to triple-threaded headless screws in first metatarsophalangeal joint arthrodesis. Methods: First metatarsophalangeal joint arthrodesis using a crossed screw technique was performed on 11 paired, preserved cadaver first rays with two 4.0-mm triple-threaded, cannulated headless screws or two 4.0-mm partially threaded, cannulated lag screws. The constructs were tested to failure through dorsally directed cantilever bending. Results: The triple-threaded, cannulated headless screws displayed significantly greater bending stiffness (p= 0.017) and failure load (p= 0.040) during load-to-failure testing compared to the partially threaded, cannulated lag screws. Conclusions: Triple-threaded, cannulated headless screws may be a viable alternative to partially threaded lag screws in first metatarsophalangeal arthrodesis.
AB - Background: Triple-threaded, cannulated headless screws of varying thread diameters and pitch are designed to maintain thread length across the arthrodesis plane, provide joint compression, and reduce countersinking. This study tested the biomechanical fixation strength of conventional partially threaded lag screws compared to triple-threaded headless screws in first metatarsophalangeal joint arthrodesis. Methods: First metatarsophalangeal joint arthrodesis using a crossed screw technique was performed on 11 paired, preserved cadaver first rays with two 4.0-mm triple-threaded, cannulated headless screws or two 4.0-mm partially threaded, cannulated lag screws. The constructs were tested to failure through dorsally directed cantilever bending. Results: The triple-threaded, cannulated headless screws displayed significantly greater bending stiffness (p= 0.017) and failure load (p= 0.040) during load-to-failure testing compared to the partially threaded, cannulated lag screws. Conclusions: Triple-threaded, cannulated headless screws may be a viable alternative to partially threaded lag screws in first metatarsophalangeal arthrodesis.
KW - Arthrodesis
KW - Fusion
KW - Hallux rigidus
KW - Hallux valgus
KW - Rheumatoid arthritis
UR - http://www.scopus.com/inward/record.url?scp=84899947206&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84899947206&partnerID=8YFLogxK
U2 - 10.1016/j.fas.2014.02.009
DO - 10.1016/j.fas.2014.02.009
M3 - Article
VL - 20
SP - 144
EP - 148
JO - Foot and Ankle Surgery
JF - Foot and Ankle Surgery
SN - 1268-7731
IS - 2
ER -