Back to Search
Start Over
Is intramedullary screw fixation biomechanically superior to locking plate fixation and/or tension band wiring in transverse olecranon fractures? A cadaveric biomechanical comparison study
- Source :
- Injury. 51(4)
- Publication Year :
- 2019
-
Abstract
- Objectives To compare clinically important mechanical properties of three techniques used to fix transverse olecranon fractures (Arbeitsgemeinschaft fur Osteosynthesefragen and Orthopaedic Trauma Association class 2U1B1): (1) intramedullary (IM) screw, (2) locking plate, and (3) tension band wire in a realistic loading protocol using a cadaveric model. Methods Fresh frozen cadaveric transverse olecranon fracture models were fixed with an IM screw (n = 6), a locking plate (n = 6), or a tension band (n = 6). Compression after fixation was recorded using a pressure sensor in the fracture before samples were loaded through the triceps tendon for 500 cycles of 0–500 N, assessing implant survival. The primary outcome measure was compression force before loading. The secondary outcome was frequency of implant failure defined as breakage of the implant itself or fracture gapping >5 mm. Binary outcomes were compared with χ2, and continuous variables were compared with unadjusted analysis of variance and a multivariable regression model adjusting for age, sex, dual-energy X-ray absorptiometry T-score, and testing order. Results No statistically significant difference was shown in fracture compression between IM screw (mean, 162 N; 95% confidence interval [CI], 27–297 N), locking plate (mean, 125 N; 95% CI, −9–260 N), and tension band (mean, 163 N; 95% CI, 29–298 N) in unadjusted (p = 0.89) and adjusted (p = 0.82) analyses. A 100% implant failure rate was observed with tension band compared with 0% implant failure with IM screw or locking plate (p Conclusion We found no statistically significant differences in compression across the fracture site among techniques. We did find a higher risk of implant failure with tension band compared with IM screw and locking plate during cyclic loading in cadaveric bone.
- Subjects :
- Male
Olecranon
Bone Screws
law.invention
Intramedullary rod
03 medical and health sciences
Fixation (surgical)
Fracture Fixation, Internal
0302 clinical medicine
law
Cadaver
Medicine
Humans
Olecranon Process
General Environmental Science
Aged
Orthodontics
Aged, 80 and over
030222 orthopedics
business.industry
Tension band wiring
Implant failure
030208 emergency & critical care medicine
Middle Aged
medicine.disease
Compression (physics)
Ulna Fractures
Biomechanical Phenomena
medicine.anatomical_structure
Olecranon fracture
General Earth and Planetary Sciences
Female
Stress, Mechanical
business
Cadaveric spasm
Bone Plates
Subjects
Details
- ISSN :
- 18790267
- Volume :
- 51
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Injury
- Accession number :
- edsair.doi.dedup.....987b0437d202a67fd9b055f5f525a331