Related Experiment Videos
[Dorsal oblique pelvic fixator: development and biomechanical testing].
1Unfall- und Wiederherstellungschirurgie, Universitätsklinikum Charité, Campus Virchow, Humboldt Universität zu Berlin. ulrich.stoeckle@charite.de
Der Unfallchirurg
|September 15, 2000
Summary
A new dorsal oblique pelvic external fixator offers comparable stability to the pelvic C-clamp for unstable pelvic ring injuries. This minimally invasive device aims for definitive posterior pelvic ring stabilization, outperforming supraacetabular fixators.
Area of Science:
- Orthopedic surgery
- Traumatology
- Biomechanics
Background:
- Unstable pelvic ring injuries require prompt pelvic stabilization to reduce pelvic volume.
- Current emergency devices like the pelvic C-clamp necessitate secondary procedures, increasing wound complication risks.
- Ventral external fixators offer less soft tissue damage but often lack sufficient posterior pelvic ring stability for mobilization.
Purpose of the Study:
- To develop and biomechanically evaluate a novel dorsal oblique pelvic external fixator for pelvic C-type injuries.
- To achieve primary, definitive, and minimally invasive stabilization of the posterior pelvic ring.
- To compare the stability of the new fixator against existing methods like the pelvic C-clamp and supraacetabular fixator.
Main Methods:
- Biomechanical testing was conducted using artificial pelves in a one-leg stance model within a material testing machine.
- Initial testing involved variations of the asymmetric dorsal oblique fixator with different Schanz screw configurations.
- A second series compared the optimal dorsal oblique fixator against the supraacetabular fixator and the pelvic C-clamp, using SI disruption and sacral fracture models.
Main Results:
- The novel dorsal oblique pelvic external fixator demonstrated no statistically significant difference in stability compared to the pelvic C-clamp.
- The new fixator was significantly more stable than the supraacetabular fixator.
- Stability was significantly reduced in the new fixator without pretension, highlighting the importance of this feature.
Conclusions:
- The developed dorsal oblique pelvic external fixator provides biomechanic stability comparable to the pelvic C-clamp for unstable pelvic ring injuries.
- This device represents a promising option for primary and definitive minimally invasive stabilization of the posterior pelvic ring.
- Further clinical evaluation is warranted to confirm its efficacy and safety in treating pelvic C-type injuries.