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[NITINOL shape memory staple for osteosynthesis of the scaphoid]
Reiner Winkel1, Michael Schlageter
1Abteilung für Hand- und wiederherstellende Plastische Chirurgie, BG-Unfallklinik, Frankfurt, Germany. reiner.winkel@bgu-frankfurt.de
Operative Orthopadie Und Traumatologie
|January 9, 2010
Summary
NITINOL shape memory staples effectively treat scaphoid fractures and nonunions. These staples aid bone healing in most cases, offering a reliable option for scaphoid reconstruction when surgical prerequisites are met.
Area of Science:
- Orthopedic surgery
- Biomaterials science
- Trauma surgery
Background:
- Scaphoid fractures and nonunions present significant challenges in orthopedic treatment.
- Traditional fixation methods can be complex and may require hardware removal.
- NITINOL shape memory staples offer a novel approach to scaphoid reconstruction.
Purpose of the Study:
- To evaluate the efficacy and outcomes of using NITINOL shape memory staples for scaphoid osteosynthesis.
- To determine the indications, contraindications, and surgical technique for NITINOL staple application in scaphoid injuries.
- To assess the complication rates and healing success associated with this fixation method.
Main Methods:
- Retrospective review of 65 scaphoid osteosynthesis cases using NITINOL staples from October 1995 to December 2006.
- Indications included unstable fractures, nonunions, and partial necroses of the scaphoid.
- Surgical technique involved open reduction, bone grafting (if necessary), and staple insertion following specific drilling parameters.
Main Results:
- 61 out of 65 scaphoid reconstructions achieved bone healing without further intervention.
- Three patients experienced delayed healing, and two nonunions were potentially related to staple use.
- Seven staples were removed, with one instance of loosening; most implants remained without issue.
Conclusions:
- NITINOL shape memory staples are a valuable tool for scaphoid osteosynthesis in cases of fracture and nonunion.
- Successful application depends on adhering to strict prerequisites regarding staple placement relative to the fracture line.
- This technique demonstrates high healing rates and a low complication profile when indications are appropriately met.
