Related Experiment Video
Updated: Jun 24, 2026
A Mini-Invasive Internal Fixation Technique for Studying Immobilization-Induced Knee Flexion Contracture in Rats
Published on: May 20, 2019
Arthrodesis of the first metatarsocuneiform joint: a comparative study of fixation methods
Pierce E Scranton1, J Chris Coetzee, Dominic Carreira
1Orthopedics International, 12333 NE 130th Lane Suite 400, Kirkland, WA 98034, USA. PierceScranton@hotmail.com
Background:
The Lapidus bunionectomy is a popular procedure for severe bunion deformity where metatarsus primus varus is equal to or exceeds 15 degrees. We evaluated a new locking compression plate which may improve outcomes with the Lapidus procedure.
Methods:
Ten matched pairs of cadaver feet were used to compare the standard crossed 4.0-mm compression screw method of fixation to the LPS Lapidus plate. After performing the matched operations the cadaver constructs were stressed to failure using the INSTRON and Wavemaker software.
Results:
The LPS Lapidus plate load to failure was 108 Nm with a bending moment of 6.0 Nm. The crossed screw technique was inferior at 78 Nm with a bending moment of 4.4 Nm (p = 0.02)
Conclusion:
Unlike other H-plates or locking plates, load to failure was higher with the Lapidus plate constructs.
Clinical Relevance:
The increased rigidity provided by these plates may help to minimize the risk of nonunion or malunion.
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Synarthrosis
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