Foot & ankle international · 2009
Arthrodesis of the first metatarsocuneiform joint: a comparative study of fixation methods.
Сравнительное исследованиеСтатьяНазвание и аннотация: Перевод в очереди
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Scranton Pierce E, Coetzee J Chris, Carreira Dominic
Аннотация
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.
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.