Surgical technique: Simple technique for removing a locking recon plate with damaged screw heads
Nirmal Raj Gopinathan1, Mandeep Singh Dhillon, Rajesh Kumar
1Department of Orthopaedics, Postgraduate Institute of Medical Education and Research, Sector-12, Chandigarh, India.
Background:
The introduction of locking plates in the treatment of periarticular fractures was a major breakthrough in orthopaedic evolution. Removal of these implants is extremely difficult as a result of cold welding and stripping of screw heads.
Description Of Technique:
A 31-year-old man had a schwannoma of the left C5-C6 nerve roots and upper trunk of the brachial plexus. One year before presentation he had undergone excision of the lesion through an approach using a clavicular osteotomy. The osteotomy had been fixed with a titanium locking recon plate. While surgically removing the implant, only one screw could be removed. The remaining five screws could not be turned owing to cold welding; repeated attempts at removing the screws damaged the screw heads. A large bolt cutter was used to cut the plate between the holes, and the resulting rectangular sections with the screws then were unscrewed from the bone.
Review Of Literature:
Limited literature is available regarding techniques for locking screw removal. These include using a carbide drill bit or diamond-tipped burr, high-speed disc, or conical extraction screw.
Conclusions:
Not all centers have specialized instruments such as carbide drill bits to remove screw heads, but a large bolt cutter usually is available when screws cannot be unscrewed owing to cold welding. The technique of cutting is easily reproducible and does not require additional soft tissue stripping.
