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Foot Ankle Int. 2009 Apr;30(4):341-5. doi: 10.3113/FAI.2009.0341.

Arthrodesis of the first metatarsocuneiform joint: a comparative study of fixation methods.

Author information

1
Orthopedics International, 12333 NE 130th Lane Suite 400, Kirkland, WA 98034, USA. PierceScranton@hotmail.com

Abstract

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.

PMID:
19356359
DOI:
10.3113/FAI.2009.0341
[Indexed for MEDLINE]

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